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authorCVS to git conversion script <webmaster@postgresql.org>2002-06-20 20:29:55 +0000
committerCVS to git conversion script <webmaster@postgresql.org>2002-06-20 20:29:55 +0000
commit05dedace84ef8c93fea5309c3ac55f889011429b (patch)
tree4c7f513afbbc03060039a165d1770e11be711773 /src/backend/utils/cache/relcache.c
parentd84fe82230c593f3dc5d7f427849b99d1efa8a0a (diff)
This commit was manufactured by cvs2git to create branch 'ecpg_big_bison'.
Sprout from master 2002-06-20 20:29:54 UTC Bruce Momjian <bruce@momjian.us> 'Update copyright to 2002.' 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src/include/storage/buf.h src/include/storage/buf_internals.h src/include/storage/buffile.h src/include/storage/bufmgr.h src/include/storage/bufpage.h src/include/storage/fd.h src/include/storage/freespace.h src/include/storage/ipc.h src/include/storage/item.h src/include/storage/itemid.h src/include/storage/itempos.h src/include/storage/itemptr.h src/include/storage/large_object.h src/include/storage/lmgr.h src/include/storage/lock.h src/include/storage/lwlock.h src/include/storage/off.h src/include/storage/page.h src/include/storage/pg_sema.h src/include/storage/pg_shmem.h src/include/storage/pmsignal.h src/include/storage/pos.h src/include/storage/proc.h src/include/storage/relfilenode.h src/include/storage/s_lock.h src/include/storage/shmem.h src/include/storage/sinval.h src/include/storage/sinvaladt.h src/include/storage/smgr.h src/include/storage/spin.h src/include/strdup.h src/include/tcop/dest.h src/include/tcop/fastpath.h src/include/tcop/pquery.h src/include/tcop/tcopdebug.h src/include/tcop/tcopprot.h src/include/tcop/utility.h src/include/utils/acl.h src/include/utils/array.h src/include/utils/ascii.h src/include/utils/bit.h src/include/utils/builtins.h src/include/utils/cash.h src/include/utils/catcache.h src/include/utils/date.h src/include/utils/datetime.h src/include/utils/datum.h src/include/utils/dynahash.h src/include/utils/dynamic_loader.h src/include/utils/elog.h src/include/utils/exc.h src/include/utils/excid.h src/include/utils/fcache.h src/include/utils/fmgrtab.h src/include/utils/formatting.h src/include/utils/geo_decls.h src/include/utils/guc.h src/include/utils/hsearch.h src/include/utils/inet.h src/include/utils/int8.h src/include/utils/inval.h src/include/utils/logtape.h src/include/utils/lsyscache.h src/include/utils/memutils.h src/include/utils/nabstime.h src/include/utils/numeric.h src/include/utils/palloc.h src/include/utils/pg_crc.h src/include/utils/pg_locale.h src/include/utils/pg_lzcompress.h src/include/utils/portal.h src/include/utils/ps_status.h src/include/utils/rel.h src/include/utils/relcache.h src/include/utils/selfuncs.h src/include/utils/sets.h src/include/utils/syscache.h src/include/utils/timestamp.h src/include/utils/tqual.h src/include/utils/tuplesort.h src/include/utils/tuplestore.h src/include/utils/varbit.h src/interfaces/Makefile src/interfaces/cli/example1.c src/interfaces/cli/example2.c src/interfaces/cli/sqlcli.h src/interfaces/jdbc/CHANGELOG src/interfaces/jdbc/Implementation src/interfaces/jdbc/Makefile src/interfaces/jdbc/README src/interfaces/jdbc/build.xml src/interfaces/jdbc/example/ImageViewer.java src/interfaces/jdbc/example/Unicode.java src/interfaces/jdbc/example/basic.java src/interfaces/jdbc/example/blobtest.java src/interfaces/jdbc/example/corba/StockClient.java src/interfaces/jdbc/example/corba/StockDB.java src/interfaces/jdbc/example/corba/StockDispenserImpl.java src/interfaces/jdbc/example/corba/StockItemImpl.java src/interfaces/jdbc/example/corba/StockServer.java src/interfaces/jdbc/example/corba/readme src/interfaces/jdbc/example/corba/stock.idl src/interfaces/jdbc/example/corba/stock.sql src/interfaces/jdbc/example/datestyle.java src/interfaces/jdbc/example/metadata.java src/interfaces/jdbc/example/psql.java src/interfaces/jdbc/example/threadsafe.java src/interfaces/jdbc/jdbc.jpx src/interfaces/jdbc/org/postgresql/Connection.java src/interfaces/jdbc/org/postgresql/Driver.java.in src/interfaces/jdbc/org/postgresql/Field.java src/interfaces/jdbc/org/postgresql/PG_Stream.java src/interfaces/jdbc/org/postgresql/PostgresqlDataSource.java src/interfaces/jdbc/org/postgresql/ResultSet.java src/interfaces/jdbc/org/postgresql/Statement.java src/interfaces/jdbc/org/postgresql/core/BytePoolDim1.java src/interfaces/jdbc/org/postgresql/core/BytePoolDim2.java src/interfaces/jdbc/org/postgresql/core/Encoding.java src/interfaces/jdbc/org/postgresql/core/MemoryPool.java src/interfaces/jdbc/org/postgresql/core/ObjectPool.java src/interfaces/jdbc/org/postgresql/core/QueryExecutor.java src/interfaces/jdbc/org/postgresql/core/SimpleObjectPool.java src/interfaces/jdbc/org/postgresql/core/StartupPacket.java src/interfaces/jdbc/org/postgresql/errors.properties src/interfaces/jdbc/org/postgresql/errors_de.properties src/interfaces/jdbc/org/postgresql/errors_fr.properties src/interfaces/jdbc/org/postgresql/errors_it.properties src/interfaces/jdbc/org/postgresql/errors_nl.properties src/interfaces/jdbc/org/postgresql/errors_zh_TW.properties src/interfaces/jdbc/org/postgresql/fastpath/Fastpath.java src/interfaces/jdbc/org/postgresql/fastpath/FastpathArg.java src/interfaces/jdbc/org/postgresql/geometric/PGbox.java src/interfaces/jdbc/org/postgresql/geometric/PGcircle.java src/interfaces/jdbc/org/postgresql/geometric/PGline.java src/interfaces/jdbc/org/postgresql/geometric/PGlseg.java src/interfaces/jdbc/org/postgresql/geometric/PGpath.java src/interfaces/jdbc/org/postgresql/geometric/PGpoint.java src/interfaces/jdbc/org/postgresql/geometric/PGpolygon.java src/interfaces/jdbc/org/postgresql/jdbc1/CallableStatement.java src/interfaces/jdbc/org/postgresql/jdbc1/Connection.java src/interfaces/jdbc/org/postgresql/jdbc1/DatabaseMetaData.java src/interfaces/jdbc/org/postgresql/jdbc1/PreparedStatement.java src/interfaces/jdbc/org/postgresql/jdbc1/ResultSet.java src/interfaces/jdbc/org/postgresql/jdbc1/ResultSetMetaData.java src/interfaces/jdbc/org/postgresql/jdbc1/Statement.java src/interfaces/jdbc/org/postgresql/jdbc2/Array.java src/interfaces/jdbc/org/postgresql/jdbc2/CallableStatement.java src/interfaces/jdbc/org/postgresql/jdbc2/Connection.java src/interfaces/jdbc/org/postgresql/jdbc2/DatabaseMetaData.java src/interfaces/jdbc/org/postgresql/jdbc2/PBatchUpdateException.java src/interfaces/jdbc/org/postgresql/jdbc2/PreparedStatement.java src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java src/interfaces/jdbc/org/postgresql/jdbc2/ResultSetMetaData.java src/interfaces/jdbc/org/postgresql/jdbc2/Statement.java src/interfaces/jdbc/org/postgresql/jdbc2/UpdateableResultSet.java src/interfaces/jdbc/org/postgresql/largeobject/BlobInputStream.java src/interfaces/jdbc/org/postgresql/largeobject/BlobOutputStream.java src/interfaces/jdbc/org/postgresql/largeobject/LargeObject.java src/interfaces/jdbc/org/postgresql/largeobject/LargeObjectManager.java src/interfaces/jdbc/org/postgresql/largeobject/PGblob.java src/interfaces/jdbc/org/postgresql/largeobject/PGclob.java src/interfaces/jdbc/org/postgresql/test/JDBC2Tests.java src/interfaces/jdbc/org/postgresql/test/README src/interfaces/jdbc/org/postgresql/test/jdbc2/ANTTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/BatchExecuteTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/BlobTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/ConnectionTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/DatabaseMetaDataTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/DateTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/DriverTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/EncodingTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/JBuilderTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/MiscTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/ResultSetTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/TimeTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/TimestampTest.java src/interfaces/jdbc/org/postgresql/test/jdbc2/UpdateableResultTest.java src/interfaces/jdbc/org/postgresql/util/MD5Digest.java src/interfaces/jdbc/org/postgresql/util/MessageTranslator.java src/interfaces/jdbc/org/postgresql/util/PGbytea.java src/interfaces/jdbc/org/postgresql/util/PGmoney.java src/interfaces/jdbc/org/postgresql/util/PGobject.java src/interfaces/jdbc/org/postgresql/util/PGtokenizer.java src/interfaces/jdbc/org/postgresql/util/PSQLException.java src/interfaces/jdbc/org/postgresql/util/Serialize.java src/interfaces/jdbc/org/postgresql/util/UnixCrypt.java src/interfaces/jdbc/org/postgresql/xa/ClientConnection.java src/interfaces/jdbc/org/postgresql/xa/TwoPhaseConnection.java src/interfaces/jdbc/org/postgresql/xa/TxConnection.java src/interfaces/jdbc/org/postgresql/xa/XAConnectionImpl.java src/interfaces/jdbc/org/postgresql/xa/XADataSourceImpl.java src/interfaces/jdbc/utils/CheckVersion.java src/interfaces/jdbc/utils/buildDriver src/interfaces/jdbc/utils/changelog.pl src/interfaces/libpgeasy/Makefile src/interfaces/libpgeasy/README src/interfaces/libpgeasy/examples/Makefile src/interfaces/libpgeasy/examples/pginsert.c src/interfaces/libpgeasy/examples/pgmultiresult.c src/interfaces/libpgeasy/examples/pgnulltest.c src/interfaces/libpgeasy/examples/pgwordcount.c src/interfaces/libpgeasy/halt.c src/interfaces/libpgeasy/halt.h src/interfaces/libpgeasy/libpgeasy.c src/interfaces/libpgeasy/libpgeasy.h src/interfaces/libpgtcl/Makefile src/interfaces/libpgtcl/README 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src/interfaces/libpq/ru.po src/interfaces/libpq/sv.po src/interfaces/libpq/win32.c src/interfaces/libpq/win32.h src/interfaces/libpq/win32.mak src/interfaces/libpq/zh_CN.po src/interfaces/libpq/zh_TW.po src/interfaces/libpq++/CHANGES src/interfaces/libpq++/Makefile src/interfaces/libpq++/README src/interfaces/libpq++/TODO src/interfaces/libpq++/examples/Makefile src/interfaces/libpq++/examples/testlibpq0.cc src/interfaces/libpq++/examples/testlibpq1.cc src/interfaces/libpq++/examples/testlibpq2.cc src/interfaces/libpq++/examples/testlibpq2.sql src/interfaces/libpq++/examples/testlibpq3.cc src/interfaces/libpq++/examples/testlibpq3.sql src/interfaces/libpq++/examples/testlibpq4.cc src/interfaces/libpq++/examples/testlibpq4.sql src/interfaces/libpq++/examples/testlibpq5.cc src/interfaces/libpq++/examples/testlibpq5.sql src/interfaces/libpq++/examples/testlibpq6.cc src/interfaces/libpq++/examples/testlo.cc src/interfaces/libpq++/libpq++.h src/interfaces/libpq++/libpq++dll.rc src/interfaces/libpq++/pgconnection.cc src/interfaces/libpq++/pgconnection.h src/interfaces/libpq++/pgcursordb.cc src/interfaces/libpq++/pgcursordb.h src/interfaces/libpq++/pgdatabase.cc src/interfaces/libpq++/pgdatabase.h src/interfaces/libpq++/pglobject.cc src/interfaces/libpq++/pglobject.h src/interfaces/libpq++/pgtransdb.cc src/interfaces/libpq++/pgtransdb.h src/interfaces/libpq++/win32.mak src/interfaces/odbc/GNUmakefile src/interfaces/odbc/bind.c src/interfaces/odbc/bind.h src/interfaces/odbc/columninfo.c src/interfaces/odbc/columninfo.h src/interfaces/odbc/connection.c src/interfaces/odbc/connection.h src/interfaces/odbc/convert.c src/interfaces/odbc/convert.h src/interfaces/odbc/descriptor.h src/interfaces/odbc/dlg_specific.c src/interfaces/odbc/dlg_specific.h src/interfaces/odbc/dlg_wingui.c src/interfaces/odbc/drvconn.c src/interfaces/odbc/environ.c src/interfaces/odbc/environ.h src/interfaces/odbc/execute.c src/interfaces/odbc/gpps.c src/interfaces/odbc/gpps.h src/interfaces/odbc/info.c src/interfaces/odbc/info30.c src/interfaces/odbc/iodbc.h src/interfaces/odbc/isql.h src/interfaces/odbc/isqlext.h src/interfaces/odbc/license.txt src/interfaces/odbc/lobj.c src/interfaces/odbc/lobj.h src/interfaces/odbc/md5.c src/interfaces/odbc/md5.h src/interfaces/odbc/misc.c src/interfaces/odbc/misc.h src/interfaces/odbc/multibyte.c src/interfaces/odbc/multibyte.h src/interfaces/odbc/notice.txt src/interfaces/odbc/odbc.sql src/interfaces/odbc/odbcapi.c src/interfaces/odbc/odbcapi25w.c src/interfaces/odbc/odbcapi30.c src/interfaces/odbc/odbcapi30w.c src/interfaces/odbc/odbcapiw.c src/interfaces/odbc/odbcinst.ini src/interfaces/odbc/options.c src/interfaces/odbc/parse.c src/interfaces/odbc/pgapi30.c src/interfaces/odbc/pgapifunc.h src/interfaces/odbc/pgtypes.c src/interfaces/odbc/pgtypes.h src/interfaces/odbc/psqlodbc.c src/interfaces/odbc/psqlodbc.h src/interfaces/odbc/psqlodbc.rc src/interfaces/odbc/psqlodbc.reg src/interfaces/odbc/psqlodbc30.reg src/interfaces/odbc/psqlodbc30w.reg src/interfaces/odbc/psqlodbc_api30.def src/interfaces/odbc/psqlodbc_api30w.def src/interfaces/odbc/psqlodbc_apiw.def src/interfaces/odbc/psqlodbc_win32.def src/interfaces/odbc/qresult.c src/interfaces/odbc/qresult.h src/interfaces/odbc/readme.txt src/interfaces/odbc/resource.h src/interfaces/odbc/results.c src/interfaces/odbc/setup.c src/interfaces/odbc/setup.rul src/interfaces/odbc/socket.c src/interfaces/odbc/socket.h src/interfaces/odbc/statement.c src/interfaces/odbc/statement.h src/interfaces/odbc/tuple.c src/interfaces/odbc/tuple.h src/interfaces/odbc/tuplelist.c src/interfaces/odbc/tuplelist.h src/interfaces/odbc/version.h src/interfaces/odbc/win32.mak src/interfaces/odbc/win32_30.mak src/interfaces/odbc/win32_30w.mak src/interfaces/odbc/win32w.mak src/interfaces/odbc/win_md5.c src/interfaces/odbc/win_setup.h src/interfaces/odbc/win_unicode.c src/interfaces/perl5/Changes src/interfaces/perl5/GNUmakefile src/interfaces/perl5/MANIFEST src/interfaces/perl5/Makefile.PL src/interfaces/perl5/Pg.pm src/interfaces/perl5/Pg.xs src/interfaces/perl5/README src/interfaces/perl5/examples/ApachePg.pl src/interfaces/perl5/examples/example.newstyle src/interfaces/perl5/examples/example.oldstyle src/interfaces/perl5/ppport.h src/interfaces/perl5/test.pl src/interfaces/perl5/typemap src/interfaces/python/Announce src/interfaces/python/ChangeLog src/interfaces/python/GNUmakefile src/interfaces/python/PyGreSQL.spec src/interfaces/python/README src/interfaces/python/README.linux src/interfaces/python/Setup.in.raw src/interfaces/python/pg.py src/interfaces/python/pgdb.py src/interfaces/python/pgmodule.c src/interfaces/python/setup.py src/interfaces/python/tutorial/advanced.py src/interfaces/python/tutorial/basics.py src/interfaces/python/tutorial/func.py src/interfaces/python/tutorial/syscat.py src/interfaces/ssl/client.conf src/interfaces/ssl/mkcert.sh src/interfaces/ssl/pgkeygen.sh src/interfaces/ssl/root.conf src/interfaces/ssl/server.conf src/makefiles/Makefile.aix src/makefiles/Makefile.beos src/makefiles/Makefile.bsdi src/makefiles/Makefile.darwin src/makefiles/Makefile.dgux src/makefiles/Makefile.freebsd src/makefiles/Makefile.hpux src/makefiles/Makefile.irix5 src/makefiles/Makefile.linux src/makefiles/Makefile.netbsd src/makefiles/Makefile.openbsd src/makefiles/Makefile.osf src/makefiles/Makefile.qnx4 src/makefiles/Makefile.sco src/makefiles/Makefile.solaris src/makefiles/Makefile.sunos4 src/makefiles/Makefile.svr4 src/makefiles/Makefile.ultrix4 src/makefiles/Makefile.univel src/makefiles/Makefile.unixware src/makefiles/Makefile.win src/nls-global.mk src/pl/Makefile src/pl/plperl/GNUmakefile src/pl/plperl/README src/pl/plperl/SPI.xs src/pl/plperl/eloglvl.c src/pl/plperl/eloglvl.h src/pl/plperl/plperl.c src/pl/plperl/ppport.h src/pl/plpgsql/Makefile src/pl/plpgsql/src/.cvsignore src/pl/plpgsql/src/INSTALL src/pl/plpgsql/src/Makefile src/pl/plpgsql/src/gram.y src/pl/plpgsql/src/pl_comp.c 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src/test/bench/query01 src/test/bench/query02 src/test/bench/query03 src/test/bench/query04 src/test/bench/query05 src/test/bench/query06 src/test/bench/query07 src/test/bench/query08 src/test/bench/query09 src/test/bench/query10 src/test/bench/query11 src/test/bench/query12 src/test/bench/query13 src/test/bench/query14 src/test/bench/query15 src/test/bench/query16 src/test/bench/query17 src/test/bench/query18 src/test/bench/query19 src/test/bench/query20 src/test/bench/query21 src/test/bench/query22 src/test/bench/query23 src/test/bench/query24 src/test/bench/query25 src/test/bench/query26 src/test/bench/query27 src/test/bench/query28 src/test/bench/query29 src/test/bench/query30 src/test/bench/query31 src/test/bench/query32 src/test/bench/runwisc.sh src/test/bench/wholebench.sh src/test/examples/Makefile src/test/examples/testlibpq.c src/test/examples/testlibpq2.c src/test/examples/testlibpq2.sql src/test/examples/testlibpq3.c src/test/examples/testlibpq3.sql src/test/examples/testlibpq4.c src/test/examples/testlo.c src/test/locale/Makefile src/test/locale/README src/test/locale/de_DE.ISO8859-1/Makefile src/test/locale/de_DE.ISO8859-1/README src/test/locale/de_DE.ISO8859-1/expected/de-ctype.out src/test/locale/de_DE.ISO8859-1/expected/test-de-char.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-select.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-sort.out src/test/locale/de_DE.ISO8859-1/expected/test-de-text.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-upper-char.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-upper-text.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-upper-varchar.sql.out src/test/locale/de_DE.ISO8859-1/expected/test-de-varchar.sql.out src/test/locale/de_DE.ISO8859-1/runall src/test/locale/de_DE.ISO8859-1/test-de-select.sql.in src/test/locale/de_DE.ISO8859-1/test-de-sort.in src/test/locale/de_DE.ISO8859-1/test-de-upper.sql.in src/test/locale/de_DE.ISO8859-1/test-de.sql.in src/test/locale/gr_GR.ISO8859-7/Makefile src/test/locale/gr_GR.ISO8859-7/README src/test/locale/gr_GR.ISO8859-7/expected/gr-ctype.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-char.sql.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-select.sql.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-sort.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-text.sql.out src/test/locale/gr_GR.ISO8859-7/expected/test-gr-varchar.sql.out src/test/locale/gr_GR.ISO8859-7/runall src/test/locale/gr_GR.ISO8859-7/test-gr-select.sql.in src/test/locale/gr_GR.ISO8859-7/test-gr-sort.in src/test/locale/gr_GR.ISO8859-7/test-gr.sql.in src/test/locale/koi8-r/Makefile src/test/locale/koi8-r/expected/koi8-ctype.out src/test/locale/koi8-r/expected/test-koi8-char.sql.out src/test/locale/koi8-r/expected/test-koi8-select.sql.out src/test/locale/koi8-r/expected/test-koi8-sort.out src/test/locale/koi8-r/expected/test-koi8-text.sql.out src/test/locale/koi8-r/expected/test-koi8-varchar.sql.out src/test/locale/koi8-r/runall src/test/locale/koi8-r/test-koi8-select.sql.in src/test/locale/koi8-r/test-koi8-sort.in src/test/locale/koi8-r/test-koi8.sql.in src/test/locale/koi8-to-win1251/Makefile src/test/locale/koi8-to-win1251/README src/test/locale/koi8-to-win1251/expected/test-koi8-char.sql.out src/test/locale/koi8-to-win1251/expected/test-koi8-select.sql.out src/test/locale/koi8-to-win1251/expected/test-koi8-sort.out src/test/locale/koi8-to-win1251/expected/test-koi8-text.sql.out src/test/locale/koi8-to-win1251/expected/test-koi8-varchar.sql.out src/test/locale/koi8-to-win1251/runall src/test/locale/koi8-to-win1251/test-koi8-select.sql.in src/test/locale/koi8-to-win1251/test-koi8-sort.in src/test/locale/koi8-to-win1251/test-koi8.sql.in src/test/locale/sort-test.pl src/test/locale/sort-test.py src/test/locale/test-ctype.c src/test/locale/test-pgsql-locale.c src/test/mb/README src/test/mb/expected/big5.out src/test/mb/expected/euc_cn.out src/test/mb/expected/euc_jp.out src/test/mb/expected/euc_kr.out src/test/mb/expected/euc_tw.out src/test/mb/expected/mule_internal.out src/test/mb/expected/sjis.out src/test/mb/expected/unicode.out src/test/mb/mbregress.sh src/test/mb/sql/big5.sql src/test/mb/sql/euc_cn.sql src/test/mb/sql/euc_jp.sql src/test/mb/sql/euc_kr.sql src/test/mb/sql/euc_tw.sql src/test/mb/sql/mule_internal.sql src/test/mb/sql/sjis.sql src/test/mb/sql/unicode.sql src/test/performance/results/PgSQL.970926 src/test/performance/runtests.pl src/test/performance/sqls/connection src/test/performance/sqls/crtsimple src/test/performance/sqls/crtsimpleidx src/test/performance/sqls/drpsimple src/test/performance/sqls/inssimple src/test/performance/sqls/inssimple.data src/test/performance/sqls/orbsimple src/test/performance/sqls/slcsimple src/test/performance/sqls/slcsimple.data src/test/performance/sqls/vacuum src/test/performance/start-pgsql.sh src/test/regress/GNUmakefile src/test/regress/Makefile src/test/regress/README src/test/regress/data/agg.data src/test/regress/data/constrf.data src/test/regress/data/constro.data src/test/regress/data/dept.data src/test/regress/data/desc.data src/test/regress/data/emp.data src/test/regress/data/hash.data src/test/regress/data/onek.data src/test/regress/data/person.data src/test/regress/data/real_city.data src/test/regress/data/rect.data src/test/regress/data/streets.data src/test/regress/data/stud_emp.data src/test/regress/data/student.data src/test/regress/data/tenk.data src/test/regress/expected/abstime-solaris-1947.out src/test/regress/expected/abstime.out src/test/regress/expected/aggregates.out src/test/regress/expected/alter_table.out src/test/regress/expected/arrays.out src/test/regress/expected/bit.out src/test/regress/expected/boolean.out src/test/regress/expected/box.out src/test/regress/expected/btree_index.out src/test/regress/expected/case.out src/test/regress/expected/char.out src/test/regress/expected/char_1.out src/test/regress/expected/circle.out src/test/regress/expected/comments.out src/test/regress/expected/create_aggregate.out src/test/regress/expected/create_index.out src/test/regress/expected/create_misc.out src/test/regress/expected/create_operator.out src/test/regress/expected/create_table.out src/test/regress/expected/create_type.out src/test/regress/expected/create_view.out src/test/regress/expected/date.out src/test/regress/expected/domain.out src/test/regress/expected/errors.out src/test/regress/expected/euc_cn.out src/test/regress/expected/euc_jp.out src/test/regress/expected/euc_kr.out src/test/regress/expected/euc_tw.out src/test/regress/expected/float4-exp-three-digits.out src/test/regress/expected/float4.out src/test/regress/expected/float8-exp-three-digits.out src/test/regress/expected/float8-fp-exception.out src/test/regress/expected/float8-small-is-zero.out src/test/regress/expected/float8.out src/test/regress/expected/foreign_key.out src/test/regress/expected/geometry-alpha-precision.out src/test/regress/expected/geometry-bsdi-precision.out src/test/regress/expected/geometry-i86-gnulibc.out src/test/regress/expected/geometry-intel-beos.out src/test/regress/expected/geometry-irix.out src/test/regress/expected/geometry-positive-zeros-bsd.out src/test/regress/expected/geometry-positive-zeros.out src/test/regress/expected/geometry-powerpc-aix4.out src/test/regress/expected/geometry-powerpc-darwin.out src/test/regress/expected/geometry-powerpc-linux-gnulibc1.out src/test/regress/expected/geometry-solaris-i386-pc.out src/test/regress/expected/geometry-solaris-precision.out src/test/regress/expected/geometry-uw7-cc.out src/test/regress/expected/geometry-uw7-gcc.out src/test/regress/expected/geometry.out src/test/regress/expected/hash_index.out src/test/regress/expected/horology-no-DST-before-1970.out src/test/regress/expected/horology-solaris-1947.out src/test/regress/expected/horology.out src/test/regress/expected/inet.out src/test/regress/expected/inherit.out src/test/regress/expected/insert.out src/test/regress/expected/int2.out src/test/regress/expected/int4.out src/test/regress/expected/int8-exp-three-digits.out src/test/regress/expected/int8.out src/test/regress/expected/interval.out src/test/regress/expected/join.out src/test/regress/expected/limit.out src/test/regress/expected/lseg.out src/test/regress/expected/mule_internal.out src/test/regress/expected/name.out src/test/regress/expected/numeric.out src/test/regress/expected/numeric_big.out src/test/regress/expected/numerology.out src/test/regress/expected/oid.out src/test/regress/expected/oidjoins.out src/test/regress/expected/opr_sanity.out src/test/regress/expected/path.out src/test/regress/expected/plpgsql.out src/test/regress/expected/point.out src/test/regress/expected/polygon.out src/test/regress/expected/portals.out src/test/regress/expected/portals_p2.out src/test/regress/expected/privileges.out src/test/regress/expected/random.out src/test/regress/expected/reltime.out src/test/regress/expected/rules.out src/test/regress/expected/sanity_check.out src/test/regress/expected/select.out src/test/regress/expected/select_distinct.out src/test/regress/expected/select_distinct_on.out src/test/regress/expected/select_having.out src/test/regress/expected/select_having_1.out src/test/regress/expected/select_implicit.out src/test/regress/expected/select_implicit_1.out src/test/regress/expected/select_into.out src/test/regress/expected/select_views.out src/test/regress/expected/select_views_1.out src/test/regress/expected/sql_ascii.out src/test/regress/expected/strings.out src/test/regress/expected/subselect.out src/test/regress/expected/temp.out src/test/regress/expected/text.out src/test/regress/expected/time.out src/test/regress/expected/timestamp.out src/test/regress/expected/timestamptz.out src/test/regress/expected/timetz.out src/test/regress/expected/tinterval-solaris-1947.out src/test/regress/expected/tinterval.out src/test/regress/expected/transactions.out src/test/regress/expected/triggers.out src/test/regress/expected/type_sanity.out src/test/regress/expected/union.out src/test/regress/expected/varchar.out src/test/regress/expected/varchar_1.out src/test/regress/input/constraints.source src/test/regress/input/copy.source src/test/regress/input/create_function_1.source src/test/regress/input/create_function_2.source src/test/regress/input/misc.source src/test/regress/output/constraints.source src/test/regress/output/copy.source src/test/regress/output/create_function_1.source src/test/regress/output/create_function_2.source src/test/regress/output/misc.source src/test/regress/parallel_schedule src/test/regress/pg_regress.sh src/test/regress/regress.c src/test/regress/regressplans.sh src/test/regress/resultmap src/test/regress/serial_schedule src/test/regress/sql/abstime.sql src/test/regress/sql/aggregates.sql src/test/regress/sql/alter_table.sql src/test/regress/sql/arrays.sql src/test/regress/sql/bit.sql src/test/regress/sql/boolean.sql src/test/regress/sql/box.sql src/test/regress/sql/btree_index.sql src/test/regress/sql/case.sql src/test/regress/sql/char.sql src/test/regress/sql/circle.sql src/test/regress/sql/comments.sql src/test/regress/sql/create_aggregate.sql src/test/regress/sql/create_index.sql src/test/regress/sql/create_misc.sql src/test/regress/sql/create_operator.sql src/test/regress/sql/create_table.sql src/test/regress/sql/create_type.sql src/test/regress/sql/create_view.sql src/test/regress/sql/date.sql src/test/regress/sql/domain.sql src/test/regress/sql/drop.sql src/test/regress/sql/errors.sql src/test/regress/sql/euc_cn.sql src/test/regress/sql/euc_jp.sql src/test/regress/sql/euc_kr.sql src/test/regress/sql/euc_tw.sql src/test/regress/sql/float4.sql src/test/regress/sql/float8.sql src/test/regress/sql/foreign_key.sql src/test/regress/sql/geometry.sql src/test/regress/sql/hash_index.sql src/test/regress/sql/horology.sql src/test/regress/sql/inet.sql src/test/regress/sql/inherit.sql src/test/regress/sql/insert.sql src/test/regress/sql/int2.sql src/test/regress/sql/int4.sql src/test/regress/sql/int8.sql src/test/regress/sql/interval.sql src/test/regress/sql/join.sql src/test/regress/sql/limit.sql src/test/regress/sql/lseg.sql src/test/regress/sql/mule_internal.sql src/test/regress/sql/name.sql src/test/regress/sql/numeric.sql src/test/regress/sql/numeric_big.sql src/test/regress/sql/numerology.sql src/test/regress/sql/oid.sql src/test/regress/sql/oidjoins.sql src/test/regress/sql/opr_sanity.sql src/test/regress/sql/path.sql src/test/regress/sql/plpgsql.sql src/test/regress/sql/point.sql src/test/regress/sql/polygon.sql src/test/regress/sql/portals.sql src/test/regress/sql/portals_p2.sql src/test/regress/sql/privileges.sql src/test/regress/sql/random.sql src/test/regress/sql/reltime.sql src/test/regress/sql/rules.sql src/test/regress/sql/sanity_check.sql src/test/regress/sql/select.sql src/test/regress/sql/select_distinct.sql src/test/regress/sql/select_distinct_on.sql src/test/regress/sql/select_having.sql src/test/regress/sql/select_implicit.sql src/test/regress/sql/select_into.sql src/test/regress/sql/select_views.sql src/test/regress/sql/sql_ascii.sql src/test/regress/sql/strings.sql src/test/regress/sql/subselect.sql src/test/regress/sql/temp.sql src/test/regress/sql/text.sql src/test/regress/sql/time.sql src/test/regress/sql/timestamp.sql src/test/regress/sql/timestamptz.sql src/test/regress/sql/timetz.sql src/test/regress/sql/tinterval.sql src/test/regress/sql/transactions.sql src/test/regress/sql/triggers.sql src/test/regress/sql/type_sanity.sql src/test/regress/sql/union.sql src/test/regress/sql/varchar.sql src/tools/RELEASE_CHANGES src/tools/backend/README src/tools/backend/backend_dirs.html src/tools/backend/flow.fig src/tools/backend/flow.gif src/tools/backend/index.html src/tools/ccsym src/tools/copyright src/tools/entab/Makefile src/tools/entab/entab.c src/tools/entab/entab.man src/tools/entab/halt.c src/tools/find_badmacros src/tools/find_static src/tools/find_typedef src/tools/make_ctags src/tools/make_diff/README src/tools/make_diff/cporig src/tools/make_diff/difforig src/tools/make_diff/rmorig src/tools/make_etags src/tools/make_keywords src/tools/make_mkid src/tools/pgcvslog src/tools/pginclude/README src/tools/pginclude/pgcompinclude src/tools/pginclude/pgdefine src/tools/pginclude/pgfixinclude src/tools/pginclude/pgrminclude src/tools/pgindent/README src/tools/pgindent/indent.bsd.patch src/tools/pgindent/pgcppindent src/tools/pgindent/pgindent src/tools/pgindent/pgjindent src/tutorial/Makefile src/tutorial/README src/tutorial/advanced.source src/tutorial/basics.source src/tutorial/beard.c src/tutorial/complex.c src/tutorial/complex.source src/tutorial/funcs.c src/tutorial/funcs.source src/tutorial/funcs_new.c src/tutorial/syscat.source src/utils/Makefile src/utils/README src/utils/dllinit.c src/utils/getopt.c src/utils/strdup.c src/win32.mak
Diffstat (limited to 'src/backend/utils/cache/relcache.c')
-rw-r--r--src/backend/utils/cache/relcache.c3229
1 files changed, 0 insertions, 3229 deletions
diff --git a/src/backend/utils/cache/relcache.c b/src/backend/utils/cache/relcache.c
deleted file mode 100644
index ec70be31b67..00000000000
--- a/src/backend/utils/cache/relcache.c
+++ /dev/null
@@ -1,3229 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * relcache.c
- * POSTGRES relation descriptor cache code
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/cache/relcache.c,v 1.165 2002/06/20 20:29:39 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-/*
- * INTERFACE ROUTINES
- * RelationCacheInitialize - initialize relcache
- * RelationCacheInitializePhase2 - finish initializing relcache
- * RelationIdGetRelation - get a reldesc by relation id
- * RelationSysNameGetRelation - get a reldesc by system rel name
- * RelationIdCacheGetRelation - get a cached reldesc by relid
- * RelationClose - close an open relation
- *
- * NOTES
- * The following code contains many undocumented hacks. Please be
- * careful....
- */
-#include "postgres.h"
-
-#include <sys/types.h>
-#include <errno.h>
-#include <sys/file.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#include "access/genam.h"
-#include "access/heapam.h"
-#include "access/istrat.h"
-#include "catalog/catalog.h"
-#include "catalog/catname.h"
-#include "catalog/indexing.h"
-#include "catalog/pg_amop.h"
-#include "catalog/pg_amproc.h"
-#include "catalog/pg_attrdef.h"
-#include "catalog/pg_attribute.h"
-#include "catalog/pg_index.h"
-#include "catalog/pg_namespace.h"
-#include "catalog/pg_opclass.h"
-#include "catalog/pg_proc.h"
-#include "catalog/pg_relcheck.h"
-#include "catalog/pg_rewrite.h"
-#include "catalog/pg_type.h"
-#include "commands/trigger.h"
-#include "miscadmin.h"
-#include "storage/smgr.h"
-#include "utils/builtins.h"
-#include "utils/catcache.h"
-#include "utils/fmgroids.h"
-#include "utils/inval.h"
-#include "utils/lsyscache.h"
-#include "utils/relcache.h"
-#include "utils/syscache.h"
-
-
-/*
- * name of relcache init file, used to speed up backend startup
- */
-#define RELCACHE_INIT_FILENAME "pg_internal.init"
-
-/*
- * hardcoded tuple descriptors. see include/catalog/pg_attribute.h
- */
-static FormData_pg_attribute Desc_pg_class[Natts_pg_class] = {Schema_pg_class};
-static FormData_pg_attribute Desc_pg_attribute[Natts_pg_attribute] = {Schema_pg_attribute};
-static FormData_pg_attribute Desc_pg_proc[Natts_pg_proc] = {Schema_pg_proc};
-static FormData_pg_attribute Desc_pg_type[Natts_pg_type] = {Schema_pg_type};
-
-/*
- * Hash tables that index the relation cache
- *
- * Relations are looked up two ways, by OID and by name,
- * thus there are two hash tables for referencing them.
- *
- * The OID index covers all relcache entries. The name index
- * covers *only* system relations (only those in PG_CATALOG_NAMESPACE).
- */
-static HTAB *RelationIdCache;
-static HTAB *RelationSysNameCache;
-
-/*
- * Bufmgr uses RelFileNode for lookup. Actually, I would like to do
- * not pass Relation to bufmgr & beyond at all and keep some cache
- * in smgr, but no time to do it right way now. -- vadim 10/22/2000
- */
-static HTAB *RelationNodeCache;
-
-/*
- * newlyCreatedRelns -
- * relations created during this transaction. We need to keep track of
- * these.
- */
-static List *newlyCreatedRelns = NIL;
-
-/*
- * This flag is false until we have prepared the critical relcache entries
- * that are needed to do indexscans on the tables read by relcache building.
- */
-bool criticalRelcachesBuilt = false;
-
-/*
- * This flag is set if we discover that we need to write a new relcache
- * cache file at the end of startup.
- */
-static bool needNewCacheFile = false;
-
-/*
- * This counter counts relcache inval events received since backend startup
- * (but only for rels that are actually in cache). Presently, we use it only
- * to detect whether data about to be written by write_relcache_init_file()
- * might already be obsolete.
- */
-static long relcacheInvalsReceived = 0L;
-
-/*
- * This list remembers the OIDs of the relations cached in the relcache
- * init file.
- */
-static List *initFileRelationIds = NIL;
-
-/*
- * RelationBuildDescInfo exists so code can be shared
- * between RelationIdGetRelation() and RelationSysNameGetRelation()
- */
-typedef struct RelationBuildDescInfo
-{
- int infotype; /* lookup by id or by name */
-#define INFO_RELID 1
-#define INFO_RELNAME 2
- union
- {
- Oid info_id; /* relation object id */
- char *info_name; /* system relation name */
- } i;
-} RelationBuildDescInfo;
-
-typedef struct relidcacheent
-{
- Oid reloid;
- Relation reldesc;
-} RelIdCacheEnt;
-
-typedef struct relnamecacheent
-{
- NameData relname;
- Relation reldesc;
-} RelNameCacheEnt;
-
-typedef struct relnodecacheent
-{
- RelFileNode relnode;
- Relation reldesc;
-} RelNodeCacheEnt;
-
-/*
- * macros to manipulate the lookup hashtables
- */
-#define RelationCacheInsert(RELATION) \
-do { \
- RelIdCacheEnt *idhentry; RelNodeCacheEnt *nodentry; bool found; \
- idhentry = (RelIdCacheEnt*)hash_search(RelationIdCache, \
- (void *) &(RELATION->rd_id), \
- HASH_ENTER, \
- &found); \
- if (idhentry == NULL) \
- elog(ERROR, "out of memory for relation descriptor cache"); \
- /* used to give notice if found -- now just keep quiet */ \
- idhentry->reldesc = RELATION; \
- nodentry = (RelNodeCacheEnt*)hash_search(RelationNodeCache, \
- (void *) &(RELATION->rd_node), \
- HASH_ENTER, \
- &found); \
- if (nodentry == NULL) \
- elog(ERROR, "out of memory for relation descriptor cache"); \
- /* used to give notice if found -- now just keep quiet */ \
- nodentry->reldesc = RELATION; \
- if (IsSystemNamespace(RelationGetNamespace(RELATION))) \
- { \
- char *relname = RelationGetRelationName(RELATION); \
- RelNameCacheEnt *namehentry; \
- namehentry = (RelNameCacheEnt*)hash_search(RelationSysNameCache, \
- relname, \
- HASH_ENTER, \
- &found); \
- if (namehentry == NULL) \
- elog(ERROR, "out of memory for relation descriptor cache"); \
- /* used to give notice if found -- now just keep quiet */ \
- namehentry->reldesc = RELATION; \
- } \
-} while(0)
-
-#define RelationIdCacheLookup(ID, RELATION) \
-do { \
- RelIdCacheEnt *hentry; \
- hentry = (RelIdCacheEnt*)hash_search(RelationIdCache, \
- (void *)&(ID), HASH_FIND,NULL); \
- if (hentry) \
- RELATION = hentry->reldesc; \
- else \
- RELATION = NULL; \
-} while(0)
-
-#define RelationSysNameCacheLookup(NAME, RELATION) \
-do { \
- RelNameCacheEnt *hentry; \
- hentry = (RelNameCacheEnt*)hash_search(RelationSysNameCache, \
- (void *) (NAME), HASH_FIND,NULL); \
- if (hentry) \
- RELATION = hentry->reldesc; \
- else \
- RELATION = NULL; \
-} while(0)
-
-#define RelationNodeCacheLookup(NODE, RELATION) \
-do { \
- RelNodeCacheEnt *hentry; \
- hentry = (RelNodeCacheEnt*)hash_search(RelationNodeCache, \
- (void *)&(NODE), HASH_FIND,NULL); \
- if (hentry) \
- RELATION = hentry->reldesc; \
- else \
- RELATION = NULL; \
-} while(0)
-
-#define RelationCacheDelete(RELATION) \
-do { \
- RelIdCacheEnt *idhentry; RelNodeCacheEnt *nodentry; \
- idhentry = (RelIdCacheEnt*)hash_search(RelationIdCache, \
- (void *)&(RELATION->rd_id), \
- HASH_REMOVE, NULL); \
- if (idhentry == NULL) \
- elog(WARNING, "trying to delete a reldesc that does not exist."); \
- nodentry = (RelNodeCacheEnt*)hash_search(RelationNodeCache, \
- (void *)&(RELATION->rd_node), \
- HASH_REMOVE, NULL); \
- if (nodentry == NULL) \
- elog(WARNING, "trying to delete a reldesc that does not exist."); \
- if (IsSystemNamespace(RelationGetNamespace(RELATION))) \
- { \
- char *relname = RelationGetRelationName(RELATION); \
- RelNameCacheEnt *namehentry; \
- namehentry = (RelNameCacheEnt*)hash_search(RelationSysNameCache, \
- relname, \
- HASH_REMOVE, NULL); \
- if (namehentry == NULL) \
- elog(WARNING, "trying to delete a reldesc that does not exist."); \
- } \
-} while(0)
-
-
-/*
- * Special cache for opclass-related information
- */
-typedef struct opclasscacheent
-{
- Oid opclassoid; /* lookup key: OID of opclass */
- bool valid; /* set TRUE after successful fill-in */
- StrategyNumber numStrats; /* max # of strategies (from pg_am) */
- StrategyNumber numSupport; /* max # of support procs (from pg_am) */
- Oid *operatorOids; /* strategy operators' OIDs */
- RegProcedure *operatorProcs; /* strategy operators' procs */
- RegProcedure *supportProcs; /* support procs */
-} OpClassCacheEnt;
-
-static HTAB *OpClassCache = NULL;
-
-
-/* non-export function prototypes */
-
-static void RelationClearRelation(Relation relation, bool rebuildIt);
-
-#ifdef ENABLE_REINDEX_NAILED_RELATIONS
-static void RelationReloadClassinfo(Relation relation);
-#endif /* ENABLE_REINDEX_NAILED_RELATIONS */
-static void RelationFlushRelation(Relation relation);
-static Relation RelationSysNameCacheGetRelation(const char *relationName);
-static bool load_relcache_init_file(void);
-static void write_relcache_init_file(void);
-
-static void formrdesc(const char *relationName, int natts,
- FormData_pg_attribute *att);
-
-static HeapTuple ScanPgRelation(RelationBuildDescInfo buildinfo);
-static Relation AllocateRelationDesc(Relation relation, Form_pg_class relp);
-static void RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
- Relation relation);
-static Relation RelationBuildDesc(RelationBuildDescInfo buildinfo,
- Relation oldrelation);
-static void AttrDefaultFetch(Relation relation);
-static void RelCheckFetch(Relation relation);
-static List *insert_ordered_oid(List *list, Oid datum);
-static void IndexSupportInitialize(Form_pg_index iform,
- IndexStrategy indexStrategy,
- Oid *indexOperator,
- RegProcedure *indexSupport,
- StrategyNumber maxStrategyNumber,
- StrategyNumber maxSupportNumber,
- AttrNumber maxAttributeNumber);
-static OpClassCacheEnt *LookupOpclassInfo(Oid operatorClassOid,
- StrategyNumber numStrats,
- StrategyNumber numSupport);
-
-
-/*
- * ScanPgRelation
- *
- * this is used by RelationBuildDesc to find a pg_class
- * tuple matching either a relation name or a relation id
- * as specified in buildinfo.
- *
- * NB: the returned tuple has been copied into palloc'd storage
- * and must eventually be freed with heap_freetuple.
- */
-static HeapTuple
-ScanPgRelation(RelationBuildDescInfo buildinfo)
-{
- HeapTuple pg_class_tuple;
- Relation pg_class_desc;
- const char *indexRelname;
- SysScanDesc pg_class_scan;
- ScanKeyData key[2];
- int nkeys;
-
- /*
- * form a scan key
- */
- switch (buildinfo.infotype)
- {
- case INFO_RELID:
- ScanKeyEntryInitialize(&key[0], 0,
- ObjectIdAttributeNumber,
- F_OIDEQ,
- ObjectIdGetDatum(buildinfo.i.info_id));
- nkeys = 1;
- indexRelname = ClassOidIndex;
- break;
-
- case INFO_RELNAME:
- ScanKeyEntryInitialize(&key[0], 0,
- Anum_pg_class_relname,
- F_NAMEEQ,
- NameGetDatum(buildinfo.i.info_name));
- ScanKeyEntryInitialize(&key[1], 0,
- Anum_pg_class_relnamespace,
- F_OIDEQ,
- ObjectIdGetDatum(PG_CATALOG_NAMESPACE));
- nkeys = 2;
- indexRelname = ClassNameNspIndex;
- break;
-
- default:
- elog(ERROR, "ScanPgRelation: bad buildinfo");
- return NULL; /* keep compiler quiet */
- }
-
- /*
- * Open pg_class and fetch a tuple. Force heap scan if we haven't
- * yet built the critical relcache entries (this includes initdb
- * and startup without a pg_internal.init file).
- */
- pg_class_desc = heap_openr(RelationRelationName, AccessShareLock);
- pg_class_scan = systable_beginscan(pg_class_desc, indexRelname,
- criticalRelcachesBuilt,
- SnapshotNow,
- nkeys, key);
-
- pg_class_tuple = systable_getnext(pg_class_scan);
-
- /*
- * Must copy tuple before releasing buffer.
- */
- if (HeapTupleIsValid(pg_class_tuple))
- pg_class_tuple = heap_copytuple(pg_class_tuple);
-
- /* all done */
- systable_endscan(pg_class_scan);
- heap_close(pg_class_desc, AccessShareLock);
-
- return pg_class_tuple;
-}
-
-/*
- * AllocateRelationDesc
- *
- * This is used to allocate memory for a new relation descriptor
- * and initialize the rd_rel field.
- *
- * If 'relation' is NULL, allocate a new RelationData object.
- * If not, reuse the given object (that path is taken only when
- * we have to rebuild a relcache entry during RelationClearRelation).
- */
-static Relation
-AllocateRelationDesc(Relation relation, Form_pg_class relp)
-{
- MemoryContext oldcxt;
- Form_pg_class relationForm;
-
- /* Relcache entries must live in CacheMemoryContext */
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
-
- /*
- * allocate space for new relation descriptor, if needed
- */
- if (relation == NULL)
- relation = (Relation) palloc(sizeof(RelationData));
-
- /*
- * clear all fields of reldesc
- */
- MemSet((char *) relation, 0, sizeof(RelationData));
- relation->rd_targblock = InvalidBlockNumber;
-
- /* make sure relation is marked as having no open file yet */
- relation->rd_fd = -1;
-
- /*
- * Copy the relation tuple form
- *
- * We only allocate space for the fixed fields, ie, CLASS_TUPLE_SIZE.
- * relacl is NOT stored in the relcache --- there'd be little point in
- * it, since we don't copy the tuple's nullvalues bitmap and hence
- * wouldn't know if the value is valid ... bottom line is that relacl
- * *cannot* be retrieved from the relcache. Get it from the syscache
- * if you need it.
- */
- relationForm = (Form_pg_class) palloc(CLASS_TUPLE_SIZE);
-
- memcpy((char *) relationForm, (char *) relp, CLASS_TUPLE_SIZE);
-
- /* initialize relation tuple form */
- relation->rd_rel = relationForm;
-
- /* and allocate attribute tuple form storage */
- relation->rd_att = CreateTemplateTupleDesc(relationForm->relnatts);
-
- MemoryContextSwitchTo(oldcxt);
-
- return relation;
-}
-
-/*
- * RelationBuildTupleDesc
- *
- * Form the relation's tuple descriptor from information in
- * the pg_attribute, pg_attrdef & pg_relcheck system catalogs.
- */
-static void
-RelationBuildTupleDesc(RelationBuildDescInfo buildinfo,
- Relation relation)
-{
- HeapTuple pg_attribute_tuple;
- Relation pg_attribute_desc;
- SysScanDesc pg_attribute_scan;
- ScanKeyData skey[2];
- int need;
- TupleConstr *constr;
- AttrDefault *attrdef = NULL;
- int ndef = 0;
-
- constr = (TupleConstr *) MemoryContextAlloc(CacheMemoryContext,
- sizeof(TupleConstr));
- constr->has_not_null = false;
-
- /*
- * Form a scan key that selects only user attributes (attnum > 0).
- * (Eliminating system attribute rows at the index level is lots
- * faster than fetching them.)
- */
- ScanKeyEntryInitialize(&skey[0], 0,
- Anum_pg_attribute_attrelid,
- F_OIDEQ,
- ObjectIdGetDatum(RelationGetRelid(relation)));
- ScanKeyEntryInitialize(&skey[1], 0,
- Anum_pg_attribute_attnum,
- F_INT2GT,
- Int16GetDatum(0));
-
- /*
- * Open pg_attribute and begin a scan. Force heap scan if we haven't
- * yet built the critical relcache entries (this includes initdb
- * and startup without a pg_internal.init file).
- */
- pg_attribute_desc = heap_openr(AttributeRelationName, AccessShareLock);
- pg_attribute_scan = systable_beginscan(pg_attribute_desc,
- AttributeRelidNumIndex,
- criticalRelcachesBuilt,
- SnapshotNow,
- 2, skey);
-
- /*
- * add attribute data to relation->rd_att
- */
- need = relation->rd_rel->relnatts;
-
- while (HeapTupleIsValid(pg_attribute_tuple = systable_getnext(pg_attribute_scan)))
- {
- Form_pg_attribute attp;
-
- attp = (Form_pg_attribute) GETSTRUCT(pg_attribute_tuple);
-
- if (attp->attnum <= 0 ||
- attp->attnum > relation->rd_rel->relnatts)
- elog(ERROR, "Bogus attribute number %d for %s",
- attp->attnum, RelationGetRelationName(relation));
-
- relation->rd_att->attrs[attp->attnum - 1] =
- (Form_pg_attribute) MemoryContextAlloc(CacheMemoryContext,
- ATTRIBUTE_TUPLE_SIZE);
-
- memcpy((char *) (relation->rd_att->attrs[attp->attnum - 1]),
- (char *) attp,
- ATTRIBUTE_TUPLE_SIZE);
-
- /* Update constraint/default info */
- if (attp->attnotnull)
- constr->has_not_null = true;
-
- if (attp->atthasdef)
- {
- if (attrdef == NULL)
- {
- attrdef = (AttrDefault *)
- MemoryContextAlloc(CacheMemoryContext,
- relation->rd_rel->relnatts *
- sizeof(AttrDefault));
- MemSet(attrdef, 0,
- relation->rd_rel->relnatts * sizeof(AttrDefault));
- }
- attrdef[ndef].adnum = attp->attnum;
- attrdef[ndef].adbin = NULL;
- ndef++;
- }
- need--;
- if (need == 0)
- break;
- }
-
- /*
- * end the scan and close the attribute relation
- */
- systable_endscan(pg_attribute_scan);
- heap_close(pg_attribute_desc, AccessShareLock);
-
- if (need != 0)
- elog(ERROR, "catalog is missing %d attribute(s) for relid %u",
- need, RelationGetRelid(relation));
-
- /*
- * The attcacheoff values we read from pg_attribute should all be -1
- * ("unknown"). Verify this if assert checking is on. They will be
- * computed when and if needed during tuple access.
- */
-#ifdef USE_ASSERT_CHECKING
- {
- int i;
-
- for (i = 0; i < relation->rd_rel->relnatts; i++)
- Assert(relation->rd_att->attrs[i]->attcacheoff == -1);
- }
-#endif
-
- /*
- * However, we can easily set the attcacheoff value for the first
- * attribute: it must be zero. This eliminates the need for special
- * cases for attnum=1 that used to exist in fastgetattr() and
- * index_getattr().
- */
- relation->rd_att->attrs[0]->attcacheoff = 0;
-
- /*
- * Set up constraint/default info
- */
- if (constr->has_not_null || ndef > 0 || relation->rd_rel->relchecks)
- {
- relation->rd_att->constr = constr;
-
- if (ndef > 0) /* DEFAULTs */
- {
- if (ndef < relation->rd_rel->relnatts)
- constr->defval = (AttrDefault *)
- repalloc(attrdef, ndef * sizeof(AttrDefault));
- else
- constr->defval = attrdef;
- constr->num_defval = ndef;
- AttrDefaultFetch(relation);
- }
- else
- constr->num_defval = 0;
-
- if (relation->rd_rel->relchecks > 0) /* CHECKs */
- {
- constr->num_check = relation->rd_rel->relchecks;
- constr->check = (ConstrCheck *)
- MemoryContextAlloc(CacheMemoryContext,
- constr->num_check * sizeof(ConstrCheck));
- MemSet(constr->check, 0, constr->num_check * sizeof(ConstrCheck));
- RelCheckFetch(relation);
- }
- else
- constr->num_check = 0;
- }
- else
- {
- pfree(constr);
- relation->rd_att->constr = NULL;
- }
-}
-
-/*
- * RelationBuildRuleLock
- *
- * Form the relation's rewrite rules from information in
- * the pg_rewrite system catalog.
- *
- * Note: The rule parsetrees are potentially very complex node structures.
- * To allow these trees to be freed when the relcache entry is flushed,
- * we make a private memory context to hold the RuleLock information for
- * each relcache entry that has associated rules. The context is used
- * just for rule info, not for any other subsidiary data of the relcache
- * entry, because that keeps the update logic in RelationClearRelation()
- * manageable. The other subsidiary data structures are simple enough
- * to be easy to free explicitly, anyway.
- */
-static void
-RelationBuildRuleLock(Relation relation)
-{
- MemoryContext rulescxt;
- MemoryContext oldcxt;
- HeapTuple rewrite_tuple;
- Relation rewrite_desc;
- TupleDesc rewrite_tupdesc;
- SysScanDesc rewrite_scan;
- ScanKeyData key;
- RuleLock *rulelock;
- int numlocks;
- RewriteRule **rules;
- int maxlocks;
-
- /*
- * Make the private context. Parameters are set on the assumption
- * that it'll probably not contain much data.
- */
- rulescxt = AllocSetContextCreate(CacheMemoryContext,
- RelationGetRelationName(relation),
- 0, /* minsize */
- 1024, /* initsize */
- 1024); /* maxsize */
- relation->rd_rulescxt = rulescxt;
-
- /*
- * allocate an array to hold the rewrite rules (the array is extended if
- * necessary)
- */
- maxlocks = 4;
- rules = (RewriteRule **)
- MemoryContextAlloc(rulescxt, sizeof(RewriteRule *) * maxlocks);
- numlocks = 0;
-
- /*
- * form a scan key
- */
- ScanKeyEntryInitialize(&key, 0,
- Anum_pg_rewrite_ev_class,
- F_OIDEQ,
- ObjectIdGetDatum(RelationGetRelid(relation)));
-
- /*
- * open pg_rewrite and begin a scan
- *
- * Note: since we scan the rules using RewriteRelRulenameIndex,
- * we will be reading the rules in name order, except possibly
- * during emergency-recovery operations (ie, IsIgnoringSystemIndexes).
- * This in turn ensures that rules will be fired in name order.
- */
- rewrite_desc = heap_openr(RewriteRelationName, AccessShareLock);
- rewrite_tupdesc = RelationGetDescr(rewrite_desc);
- rewrite_scan = systable_beginscan(rewrite_desc,
- RewriteRelRulenameIndex,
- true, SnapshotNow,
- 1, &key);
-
- while (HeapTupleIsValid(rewrite_tuple = systable_getnext(rewrite_scan)))
- {
- Form_pg_rewrite rewrite_form = (Form_pg_rewrite) GETSTRUCT(rewrite_tuple);
- bool isnull;
- Datum ruleaction;
- Datum rule_evqual;
- char *ruleaction_str;
- char *rule_evqual_str;
- RewriteRule *rule;
-
- rule = (RewriteRule *) MemoryContextAlloc(rulescxt,
- sizeof(RewriteRule));
-
- rule->ruleId = rewrite_tuple->t_data->t_oid;
-
- rule->event = rewrite_form->ev_type - '0';
- rule->attrno = rewrite_form->ev_attr;
- rule->isInstead = rewrite_form->is_instead;
-
- /* Must use heap_getattr to fetch ev_qual and ev_action */
-
- ruleaction = heap_getattr(rewrite_tuple,
- Anum_pg_rewrite_ev_action,
- rewrite_tupdesc,
- &isnull);
- Assert(!isnull);
- ruleaction_str = DatumGetCString(DirectFunctionCall1(textout,
- ruleaction));
- oldcxt = MemoryContextSwitchTo(rulescxt);
- rule->actions = (List *) stringToNode(ruleaction_str);
- MemoryContextSwitchTo(oldcxt);
- pfree(ruleaction_str);
-
- rule_evqual = heap_getattr(rewrite_tuple,
- Anum_pg_rewrite_ev_qual,
- rewrite_tupdesc,
- &isnull);
- Assert(!isnull);
- rule_evqual_str = DatumGetCString(DirectFunctionCall1(textout,
- rule_evqual));
- oldcxt = MemoryContextSwitchTo(rulescxt);
- rule->qual = (Node *) stringToNode(rule_evqual_str);
- MemoryContextSwitchTo(oldcxt);
- pfree(rule_evqual_str);
-
- if (numlocks >= maxlocks)
- {
- maxlocks *= 2;
- rules = (RewriteRule **)
- repalloc(rules, sizeof(RewriteRule *) * maxlocks);
- }
- rules[numlocks++] = rule;
- }
-
- /*
- * end the scan and close the attribute relation
- */
- systable_endscan(rewrite_scan);
- heap_close(rewrite_desc, AccessShareLock);
-
- /*
- * form a RuleLock and insert into relation
- */
- rulelock = (RuleLock *) MemoryContextAlloc(rulescxt, sizeof(RuleLock));
- rulelock->numLocks = numlocks;
- rulelock->rules = rules;
-
- relation->rd_rules = rulelock;
-}
-
-/*
- * equalRuleLocks
- *
- * Determine whether two RuleLocks are equivalent
- *
- * Probably this should be in the rules code someplace...
- */
-static bool
-equalRuleLocks(RuleLock *rlock1, RuleLock *rlock2)
-{
- int i;
-
- /*
- * As of 7.3 we assume the rule ordering is repeatable,
- * because RelationBuildRuleLock should read 'em in a
- * consistent order. So just compare corresponding slots.
- */
- if (rlock1 != NULL)
- {
- if (rlock2 == NULL)
- return false;
- if (rlock1->numLocks != rlock2->numLocks)
- return false;
- for (i = 0; i < rlock1->numLocks; i++)
- {
- RewriteRule *rule1 = rlock1->rules[i];
- RewriteRule *rule2 = rlock2->rules[i];
-
- if (rule1->ruleId != rule2->ruleId)
- return false;
- if (rule1->event != rule2->event)
- return false;
- if (rule1->attrno != rule2->attrno)
- return false;
- if (rule1->isInstead != rule2->isInstead)
- return false;
- if (!equal(rule1->qual, rule2->qual))
- return false;
- if (!equal(rule1->actions, rule2->actions))
- return false;
- }
- }
- else if (rlock2 != NULL)
- return false;
- return true;
-}
-
-
-/* ----------------------------------
- * RelationBuildDesc
- *
- * Build a relation descriptor --- either a new one, or by
- * recycling the given old relation object. The latter case
- * supports rebuilding a relcache entry without invalidating
- * pointers to it.
- * --------------------------------
- */
-static Relation
-RelationBuildDesc(RelationBuildDescInfo buildinfo,
- Relation oldrelation)
-{
- Relation relation;
- Oid relid;
- HeapTuple pg_class_tuple;
- Form_pg_class relp;
- MemoryContext oldcxt;
-
- /*
- * find the tuple in pg_class corresponding to the given relation id
- */
- pg_class_tuple = ScanPgRelation(buildinfo);
-
- /*
- * if no such tuple exists, return NULL
- */
- if (!HeapTupleIsValid(pg_class_tuple))
- return NULL;
-
- /*
- * get information from the pg_class_tuple
- */
- relid = pg_class_tuple->t_data->t_oid;
- relp = (Form_pg_class) GETSTRUCT(pg_class_tuple);
-
- /*
- * allocate storage for the relation descriptor, and copy
- * pg_class_tuple to relation->rd_rel.
- */
- relation = AllocateRelationDesc(oldrelation, relp);
-
- /*
- * now we can free the memory allocated for pg_class_tuple
- */
- heap_freetuple(pg_class_tuple);
-
- /*
- * initialize the relation's relation id (relation->rd_id)
- */
- RelationGetRelid(relation) = relid;
-
- /*
- * initialize relation->rd_refcnt
- */
- RelationSetReferenceCount(relation, 1);
-
- /*
- * normal relations are not nailed into the cache
- */
- relation->rd_isnailed = false;
-
- /*
- * initialize the tuple descriptor (relation->rd_att).
- */
- RelationBuildTupleDesc(buildinfo, relation);
-
- /*
- * Fetch rules and triggers that affect this relation
- */
- if (relation->rd_rel->relhasrules)
- RelationBuildRuleLock(relation);
- else
- {
- relation->rd_rules = NULL;
- relation->rd_rulescxt = NULL;
- }
-
- if (relation->rd_rel->reltriggers > 0)
- RelationBuildTriggers(relation);
- else
- relation->trigdesc = NULL;
-
- /*
- * if it's an index, initialize index-related information
- */
- if (OidIsValid(relation->rd_rel->relam))
- RelationInitIndexAccessInfo(relation);
-
- /*
- * initialize the relation lock manager information
- */
- RelationInitLockInfo(relation); /* see lmgr.c */
-
- if (relation->rd_rel->relisshared)
- relation->rd_node.tblNode = InvalidOid;
- else
- relation->rd_node.tblNode = MyDatabaseId;
- relation->rd_node.relNode = relation->rd_rel->relfilenode;
-
- /* make sure relation is marked as having no open file yet */
- relation->rd_fd = -1;
-
- /*
- * insert newly created relation into proper relcaches, restore memory
- * context and return the new reldesc.
- */
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
- RelationCacheInsert(relation);
- MemoryContextSwitchTo(oldcxt);
-
- return relation;
-}
-
-/*
- * Initialize index-access-method support data for an index relation
- */
-void
-RelationInitIndexAccessInfo(Relation relation)
-{
- HeapTuple tuple;
- Size iformsize;
- Form_pg_index iform;
- Form_pg_am aform;
- MemoryContext indexcxt;
- IndexStrategy strategy;
- Oid *operator;
- RegProcedure *support;
- FmgrInfo *supportinfo;
- int natts;
- uint16 amstrategies;
- uint16 amsupport;
-
- /*
- * Make a copy of the pg_index entry for the index. Note that this
- * is a variable-length tuple.
- */
- tuple = SearchSysCache(INDEXRELID,
- ObjectIdGetDatum(RelationGetRelid(relation)),
- 0, 0, 0);
- if (!HeapTupleIsValid(tuple))
- elog(ERROR, "RelationInitIndexAccessInfo: no pg_index entry for index %u",
- RelationGetRelid(relation));
- iformsize = tuple->t_len - tuple->t_data->t_hoff;
- iform = (Form_pg_index) MemoryContextAlloc(CacheMemoryContext, iformsize);
- memcpy(iform, GETSTRUCT(tuple), iformsize);
- ReleaseSysCache(tuple);
- relation->rd_index = iform;
-
- /* this field is now kinda redundant... */
- relation->rd_uniqueindex = iform->indisunique;
-
- /*
- * Make a copy of the pg_am entry for the index's access method
- */
- tuple = SearchSysCache(AMOID,
- ObjectIdGetDatum(relation->rd_rel->relam),
- 0, 0, 0);
- if (!HeapTupleIsValid(tuple))
- elog(ERROR, "RelationInitIndexAccessInfo: cache lookup failed for AM %u",
- relation->rd_rel->relam);
- aform = (Form_pg_am) MemoryContextAlloc(CacheMemoryContext, sizeof *aform);
- memcpy(aform, GETSTRUCT(tuple), sizeof *aform);
- ReleaseSysCache(tuple);
- relation->rd_am = aform;
-
- natts = relation->rd_rel->relnatts;
- amstrategies = aform->amstrategies;
- amsupport = aform->amsupport;
-
- /*
- * Make the private context to hold index access info. The reason we
- * need a context, and not just a couple of pallocs, is so that we
- * won't leak any subsidiary info attached to fmgr lookup records.
- *
- * Context parameters are set on the assumption that it'll probably not
- * contain much data.
- */
- indexcxt = AllocSetContextCreate(CacheMemoryContext,
- RelationGetRelationName(relation),
- 0, /* minsize */
- 512, /* initsize */
- 1024); /* maxsize */
- relation->rd_indexcxt = indexcxt;
-
- /*
- * Allocate arrays to hold data
- */
- if (amstrategies > 0)
- {
- int noperators = natts * amstrategies;
- Size stratSize;
-
- stratSize = AttributeNumberGetIndexStrategySize(natts, amstrategies);
- strategy = (IndexStrategy) MemoryContextAlloc(indexcxt, stratSize);
- MemSet(strategy, 0, stratSize);
- operator = (Oid *)
- MemoryContextAlloc(indexcxt, noperators * sizeof(Oid));
- MemSet(operator, 0, noperators * sizeof(Oid));
- }
- else
- {
- strategy = NULL;
- operator = NULL;
- }
-
- if (amsupport > 0)
- {
- int nsupport = natts * amsupport;
-
- support = (RegProcedure *)
- MemoryContextAlloc(indexcxt, nsupport * sizeof(RegProcedure));
- MemSet(support, 0, nsupport * sizeof(RegProcedure));
- supportinfo = (FmgrInfo *)
- MemoryContextAlloc(indexcxt, nsupport * sizeof(FmgrInfo));
- MemSet(supportinfo, 0, nsupport * sizeof(FmgrInfo));
- }
- else
- {
- support = NULL;
- supportinfo = NULL;
- }
-
- relation->rd_istrat = strategy;
- relation->rd_operator = operator;
- relation->rd_support = support;
- relation->rd_supportinfo = supportinfo;
-
- /*
- * Fill the strategy map and the support RegProcedure arrays.
- * (supportinfo is left as zeroes, and is filled on-the-fly when used)
- */
- IndexSupportInitialize(iform,
- strategy, operator, support,
- amstrategies, amsupport, natts);
-}
-
-/*
- * IndexSupportInitialize
- * Initializes an index strategy and associated support procedures,
- * given the index's pg_index tuple.
- *
- * Data is returned into *indexStrategy, *indexOperator, and *indexSupport,
- * all of which are objects allocated by the caller.
- *
- * The caller also passes maxStrategyNumber, maxSupportNumber, and
- * maxAttributeNumber, since these indicate the size of the arrays
- * it has allocated --- but in practice these numbers must always match
- * those obtainable from the system catalog entries for the index and
- * access method.
- */
-static void
-IndexSupportInitialize(Form_pg_index iform,
- IndexStrategy indexStrategy,
- Oid *indexOperator,
- RegProcedure *indexSupport,
- StrategyNumber maxStrategyNumber,
- StrategyNumber maxSupportNumber,
- AttrNumber maxAttributeNumber)
-{
- int attIndex;
-
- maxStrategyNumber = AMStrategies(maxStrategyNumber);
-
- /*
- * XXX note that the following assumes the INDEX tuple is well formed
- * and that the *key and *class are 0 terminated.
- */
- for (attIndex = 0; attIndex < maxAttributeNumber; attIndex++)
- {
- OpClassCacheEnt *opcentry;
-
- if (iform->indkey[attIndex] == InvalidAttrNumber ||
- !OidIsValid(iform->indclass[attIndex]))
- elog(ERROR, "IndexSupportInitialize: bogus pg_index tuple");
-
- /* look up the info for this opclass, using a cache */
- opcentry = LookupOpclassInfo(iform->indclass[attIndex],
- maxStrategyNumber,
- maxSupportNumber);
-
- /* load the strategy information for the index operators */
- if (maxStrategyNumber > 0)
- {
- StrategyMap map;
- Oid *opers;
- StrategyNumber strategy;
-
- map = IndexStrategyGetStrategyMap(indexStrategy,
- maxStrategyNumber,
- attIndex + 1);
- opers = &indexOperator[attIndex * maxStrategyNumber];
-
- for (strategy = 0; strategy < maxStrategyNumber; strategy++)
- {
- ScanKey mapentry;
-
- mapentry = StrategyMapGetScanKeyEntry(map, strategy + 1);
- if (RegProcedureIsValid(opcentry->operatorProcs[strategy]))
- {
- MemSet(mapentry, 0, sizeof(*mapentry));
- mapentry->sk_flags = 0;
- mapentry->sk_procedure = opcentry->operatorProcs[strategy];
- /*
- * Mark mapentry->sk_func invalid, until and unless
- * someone sets it up.
- */
- mapentry->sk_func.fn_oid = InvalidOid;
- }
- else
- ScanKeyEntrySetIllegal(mapentry);
- opers[strategy] = opcentry->operatorOids[strategy];
- }
- }
-
- /* if support routines exist for this access method, load them */
- if (maxSupportNumber > 0)
- {
- RegProcedure *procs;
- StrategyNumber support;
-
- procs = &indexSupport[attIndex * maxSupportNumber];
-
- for (support = 0; support < maxSupportNumber; ++support)
- procs[support] = opcentry->supportProcs[support];
- }
- }
-}
-
-/*
- * LookupOpclassInfo
- *
- * This routine maintains a per-opclass cache of the information needed
- * by IndexSupportInitialize(). This is more efficient than relying on
- * the catalog cache, because we can load all the info about a particular
- * opclass in a single indexscan of pg_amproc or pg_amop.
- *
- * The information from pg_am about expected range of strategy and support
- * numbers is passed in, rather than being looked up, mainly because the
- * caller will have it already.
- *
- * XXX There isn't any provision for flushing the cache. However, there
- * isn't any provision for flushing relcache entries when opclass info
- * changes, either :-(
- */
-static OpClassCacheEnt *
-LookupOpclassInfo(Oid operatorClassOid,
- StrategyNumber numStrats,
- StrategyNumber numSupport)
-{
- OpClassCacheEnt *opcentry;
- bool found;
- Relation pg_amop_desc;
- Relation pg_amproc_desc;
- SysScanDesc pg_amop_scan;
- SysScanDesc pg_amproc_scan;
- ScanKeyData key;
- HeapTuple htup;
- bool indexOK;
-
- if (OpClassCache == NULL)
- {
- /* First time through: initialize the opclass cache */
- HASHCTL ctl;
-
- if (!CacheMemoryContext)
- CreateCacheMemoryContext();
-
- MemSet(&ctl, 0, sizeof(ctl));
- ctl.keysize = sizeof(Oid);
- ctl.entrysize = sizeof(OpClassCacheEnt);
- ctl.hash = tag_hash;
- OpClassCache = hash_create("Operator class cache", 64,
- &ctl, HASH_ELEM | HASH_FUNCTION);
- }
-
- opcentry = (OpClassCacheEnt *) hash_search(OpClassCache,
- (void *) &operatorClassOid,
- HASH_ENTER, &found);
- if (opcentry == NULL)
- elog(ERROR, "out of memory for operator class cache");
-
- if (found && opcentry->valid)
- {
- /* Already made an entry for it */
- Assert(numStrats == opcentry->numStrats);
- Assert(numSupport == opcentry->numSupport);
- return opcentry;
- }
-
- /* Need to fill in new entry */
- opcentry->valid = false; /* until known OK */
- opcentry->numStrats = numStrats;
- opcentry->numSupport = numSupport;
-
- if (numStrats > 0)
- {
- opcentry->operatorOids = (Oid *)
- MemoryContextAlloc(CacheMemoryContext,
- numStrats * sizeof(Oid));
- MemSet(opcentry->operatorOids, 0, numStrats * sizeof(Oid));
- opcentry->operatorProcs = (RegProcedure *)
- MemoryContextAlloc(CacheMemoryContext,
- numStrats * sizeof(RegProcedure));
- MemSet(opcentry->operatorProcs, 0, numStrats * sizeof(RegProcedure));
- }
- else
- {
- opcentry->operatorOids = NULL;
- opcentry->operatorProcs = NULL;
- }
-
- if (numSupport > 0)
- {
- opcentry->supportProcs = (RegProcedure *)
- MemoryContextAlloc(CacheMemoryContext,
- numSupport * sizeof(RegProcedure));
- MemSet(opcentry->supportProcs, 0, numSupport * sizeof(RegProcedure));
- }
- else
- opcentry->supportProcs = NULL;
-
- /*
- * To avoid infinite recursion during startup, force a heap scan if
- * we're looking up info for the opclasses used by the indexes we
- * would like to reference here.
- */
- indexOK = criticalRelcachesBuilt ||
- (operatorClassOid != OID_BTREE_OPS_OID &&
- operatorClassOid != INT2_BTREE_OPS_OID);
-
- /*
- * Scan pg_amop to obtain operators for the opclass
- */
- if (numStrats > 0)
- {
- ScanKeyEntryInitialize(&key, 0,
- Anum_pg_amop_amopclaid,
- F_OIDEQ,
- ObjectIdGetDatum(operatorClassOid));
- pg_amop_desc = heap_openr(AccessMethodOperatorRelationName,
- AccessShareLock);
- pg_amop_scan = systable_beginscan(pg_amop_desc,
- AccessMethodStrategyIndex,
- indexOK,
- SnapshotNow,
- 1, &key);
-
- while (HeapTupleIsValid(htup = systable_getnext(pg_amop_scan)))
- {
- Form_pg_amop amopform = (Form_pg_amop) GETSTRUCT(htup);
-
- if (amopform->amopstrategy <= 0 ||
- (StrategyNumber) amopform->amopstrategy > numStrats)
- elog(ERROR, "Bogus amopstrategy number %d for opclass %u",
- amopform->amopstrategy, operatorClassOid);
- opcentry->operatorOids[amopform->amopstrategy - 1] =
- amopform->amopopr;
- opcentry->operatorProcs[amopform->amopstrategy - 1] =
- get_opcode(amopform->amopopr);
- }
-
- systable_endscan(pg_amop_scan);
- heap_close(pg_amop_desc, AccessShareLock);
- }
-
- /*
- * Scan pg_amproc to obtain support procs for the opclass
- */
- if (numSupport > 0)
- {
- ScanKeyEntryInitialize(&key, 0,
- Anum_pg_amproc_amopclaid,
- F_OIDEQ,
- ObjectIdGetDatum(operatorClassOid));
- pg_amproc_desc = heap_openr(AccessMethodProcedureRelationName,
- AccessShareLock);
- pg_amproc_scan = systable_beginscan(pg_amproc_desc,
- AccessMethodProcedureIndex,
- indexOK,
- SnapshotNow,
- 1, &key);
-
- while (HeapTupleIsValid(htup = systable_getnext(pg_amproc_scan)))
- {
- Form_pg_amproc amprocform = (Form_pg_amproc) GETSTRUCT(htup);
-
- if (amprocform->amprocnum <= 0 ||
- (StrategyNumber) amprocform->amprocnum > numSupport)
- elog(ERROR, "Bogus amproc number %d for opclass %u",
- amprocform->amprocnum, operatorClassOid);
-
- opcentry->supportProcs[amprocform->amprocnum - 1] =
- amprocform->amproc;
- }
-
- systable_endscan(pg_amproc_scan);
- heap_close(pg_amproc_desc, AccessShareLock);
- }
-
- opcentry->valid = true;
- return opcentry;
-}
-
-
-/*
- * formrdesc
- *
- * This is a special cut-down version of RelationBuildDesc()
- * used by RelationCacheInitialize() in initializing the relcache.
- * The relation descriptor is built just from the supplied parameters,
- * without actually looking at any system table entries. We cheat
- * quite a lot since we only need to work for a few basic system
- * catalogs.
- *
- * formrdesc is currently used for: pg_class, pg_attribute, pg_proc,
- * and pg_type (see RelationCacheInitialize).
- *
- * Note that these catalogs can't have constraints, default values,
- * rules, or triggers, since we don't cope with any of that.
- *
- * NOTE: we assume we are already switched into CacheMemoryContext.
- */
-static void
-formrdesc(const char *relationName,
- int natts,
- FormData_pg_attribute *att)
-{
- Relation relation;
- int i;
-
- /*
- * allocate new relation desc
- */
- relation = (Relation) palloc(sizeof(RelationData));
-
- /*
- * clear all fields of reldesc
- */
- MemSet((char *) relation, 0, sizeof(RelationData));
- relation->rd_targblock = InvalidBlockNumber;
-
- /* make sure relation is marked as having no open file yet */
- relation->rd_fd = -1;
-
- /*
- * initialize reference count
- */
- RelationSetReferenceCount(relation, 1);
-
- /*
- * all entries built with this routine are nailed-in-cache
- */
- relation->rd_isnailed = true;
-
- /*
- * initialize relation tuple form
- *
- * The data we insert here is pretty incomplete/bogus, but it'll serve to
- * get us launched. RelationCacheInitializePhase2() will read the
- * real data from pg_class and replace what we've done here.
- */
- relation->rd_rel = (Form_pg_class) palloc(CLASS_TUPLE_SIZE);
- MemSet(relation->rd_rel, 0, CLASS_TUPLE_SIZE);
-
- namestrcpy(&relation->rd_rel->relname, relationName);
- relation->rd_rel->relnamespace = PG_CATALOG_NAMESPACE;
-
- /*
- * It's important to distinguish between shared and non-shared
- * relations, even at bootstrap time, to make sure we know where they
- * are stored. At present, all relations that formrdesc is used for
- * are not shared.
- */
- relation->rd_rel->relisshared = false;
-
- relation->rd_rel->relpages = 1;
- relation->rd_rel->reltuples = 1;
- relation->rd_rel->relkind = RELKIND_RELATION;
- relation->rd_rel->relhasoids = true;
- relation->rd_rel->relnatts = (int16) natts;
-
- /*
- * initialize attribute tuple form
- *
- * Unlike the case with the relation tuple, this data had better be
- * right because it will never be replaced. The input values must be
- * correctly defined by macros in src/include/catalog/ headers.
- */
- relation->rd_att = CreateTemplateTupleDesc(natts);
-
- /*
- * initialize tuple desc info
- */
- for (i = 0; i < natts; i++)
- {
- relation->rd_att->attrs[i] = (Form_pg_attribute) palloc(ATTRIBUTE_TUPLE_SIZE);
- memcpy((char *) relation->rd_att->attrs[i],
- (char *) &att[i],
- ATTRIBUTE_TUPLE_SIZE);
- /* make sure attcacheoff is valid */
- relation->rd_att->attrs[i]->attcacheoff = -1;
- }
-
- /* initialize first attribute's attcacheoff, cf RelationBuildTupleDesc */
- relation->rd_att->attrs[0]->attcacheoff = 0;
-
- /*
- * initialize relation id from info in att array (my, this is ugly)
- */
- RelationGetRelid(relation) = relation->rd_att->attrs[0]->attrelid;
-
- /*
- * initialize the relation's lock manager and RelFileNode information
- */
- RelationInitLockInfo(relation); /* see lmgr.c */
-
- if (relation->rd_rel->relisshared)
- relation->rd_node.tblNode = InvalidOid;
- else
- relation->rd_node.tblNode = MyDatabaseId;
- relation->rd_node.relNode =
- relation->rd_rel->relfilenode = RelationGetRelid(relation);
-
- /*
- * initialize the rel-has-index flag, using hardwired knowledge
- */
- relation->rd_rel->relhasindex = false;
-
- /* In bootstrap mode, we have no indexes */
- if (!IsBootstrapProcessingMode())
- {
- /* Otherwise, all the rels formrdesc is used for have indexes */
- relation->rd_rel->relhasindex = true;
- }
-
- /*
- * add new reldesc to relcache
- */
- RelationCacheInsert(relation);
-}
-
-
-/* ----------------------------------------------------------------
- * Relation Descriptor Lookup Interface
- * ----------------------------------------------------------------
- */
-
-/*
- * RelationIdCacheGetRelation
- *
- * Lookup an existing reldesc by OID.
- *
- * Only try to get the reldesc by looking in the cache,
- * do not go to the disk.
- *
- * NB: relation ref count is incremented if successful.
- * Caller should eventually decrement count. (Usually,
- * that happens by calling RelationClose().)
- */
-Relation
-RelationIdCacheGetRelation(Oid relationId)
-{
- Relation rd;
-
- RelationIdCacheLookup(relationId, rd);
-
- if (RelationIsValid(rd))
- RelationIncrementReferenceCount(rd);
-
- return rd;
-}
-
-/*
- * RelationSysNameCacheGetRelation
- *
- * As above, but lookup by name; only works for system catalogs.
- */
-static Relation
-RelationSysNameCacheGetRelation(const char *relationName)
-{
- Relation rd;
- NameData name;
-
- /*
- * make sure that the name key used for hash lookup is properly
- * null-padded
- */
- namestrcpy(&name, relationName);
- RelationSysNameCacheLookup(NameStr(name), rd);
-
- if (RelationIsValid(rd))
- RelationIncrementReferenceCount(rd);
-
- return rd;
-}
-
-Relation
-RelationNodeCacheGetRelation(RelFileNode rnode)
-{
- Relation rd;
-
- RelationNodeCacheLookup(rnode, rd);
-
- if (RelationIsValid(rd))
- RelationIncrementReferenceCount(rd);
-
- return rd;
-}
-
-/*
- * RelationIdGetRelation
- *
- * Lookup a reldesc by OID; make one if not already in cache.
- *
- * NB: relation ref count is incremented, or set to 1 if new entry.
- * Caller should eventually decrement count. (Usually,
- * that happens by calling RelationClose().)
- */
-Relation
-RelationIdGetRelation(Oid relationId)
-{
- Relation rd;
- RelationBuildDescInfo buildinfo;
-
- /*
- * first try and get a reldesc from the cache
- */
- rd = RelationIdCacheGetRelation(relationId);
- if (RelationIsValid(rd))
- return rd;
-
- /*
- * no reldesc in the cache, so have RelationBuildDesc() build one and
- * add it.
- */
- buildinfo.infotype = INFO_RELID;
- buildinfo.i.info_id = relationId;
-
- rd = RelationBuildDesc(buildinfo, NULL);
- return rd;
-}
-
-/*
- * RelationSysNameGetRelation
- *
- * As above, but lookup by name; only works for system catalogs.
- */
-Relation
-RelationSysNameGetRelation(const char *relationName)
-{
- Relation rd;
- RelationBuildDescInfo buildinfo;
-
- /*
- * first try and get a reldesc from the cache
- */
- rd = RelationSysNameCacheGetRelation(relationName);
- if (RelationIsValid(rd))
- return rd;
-
- /*
- * no reldesc in the cache, so have RelationBuildDesc() build one and
- * add it.
- */
- buildinfo.infotype = INFO_RELNAME;
- buildinfo.i.info_name = (char *) relationName;
-
- rd = RelationBuildDesc(buildinfo, NULL);
- return rd;
-}
-
-/* ----------------------------------------------------------------
- * cache invalidation support routines
- * ----------------------------------------------------------------
- */
-
-/*
- * RelationClose - close an open relation
- *
- * Actually, we just decrement the refcount.
- *
- * NOTE: if compiled with -DRELCACHE_FORCE_RELEASE then relcache entries
- * will be freed as soon as their refcount goes to zero. In combination
- * with aset.c's CLOBBER_FREED_MEMORY option, this provides a good test
- * to catch references to already-released relcache entries. It slows
- * things down quite a bit, however.
- */
-void
-RelationClose(Relation relation)
-{
- /* Note: no locking manipulations needed */
- RelationDecrementReferenceCount(relation);
-
-#ifdef RELCACHE_FORCE_RELEASE
- if (RelationHasReferenceCountZero(relation) && !relation->rd_myxactonly)
- RelationClearRelation(relation, false);
-#endif
-}
-
-#ifdef ENABLE_REINDEX_NAILED_RELATIONS
-/*
- * RelationReloadClassinfo
- *
- * This function is especially for nailed relations.
- * relhasindex/relfilenode could be changed even for
- * nailed relations.
- */
-static void
-RelationReloadClassinfo(Relation relation)
-{
- RelationBuildDescInfo buildinfo;
- HeapTuple pg_class_tuple;
- Form_pg_class relp;
-
- if (!relation->rd_rel)
- return;
- buildinfo.infotype = INFO_RELID;
- buildinfo.i.info_id = relation->rd_id;
- pg_class_tuple = ScanPgRelation(buildinfo);
- if (!HeapTupleIsValid(pg_class_tuple))
- {
- elog(ERROR, "RelationReloadClassinfo system relation id=%d doesn't exist", relation->rd_id);
- return;
- }
- RelationCacheDelete(relation);
- relp = (Form_pg_class) GETSTRUCT(pg_class_tuple);
- memcpy((char *) relation->rd_rel, (char *) relp, CLASS_TUPLE_SIZE);
- relation->rd_node.relNode = relp->relfilenode;
- RelationCacheInsert(relation);
- heap_freetuple(pg_class_tuple);
-
- return;
-}
-#endif /* ENABLE_REINDEX_NAILED_RELATIONS */
-
-/*
- * RelationClearRelation
- *
- * Physically blow away a relation cache entry, or reset it and rebuild
- * it from scratch (that is, from catalog entries). The latter path is
- * usually used when we are notified of a change to an open relation
- * (one with refcount > 0). However, this routine just does whichever
- * it's told to do; callers must determine which they want.
- */
-static void
-RelationClearRelation(Relation relation, bool rebuildIt)
-{
- MemoryContext oldcxt;
-
- /*
- * Make sure smgr and lower levels close the relation's files, if they
- * weren't closed already. If the relation is not getting deleted,
- * the next smgr access should reopen the files automatically. This
- * ensures that the low-level file access state is updated after, say,
- * a vacuum truncation.
- */
- if (relation->rd_fd >= 0)
- {
- smgrclose(DEFAULT_SMGR, relation);
- relation->rd_fd = -1;
- }
-
- /*
- * Never, never ever blow away a nailed-in system relation, because
- * we'd be unable to recover.
- */
- if (relation->rd_isnailed)
- {
-#ifdef ENABLE_REINDEX_NAILED_RELATIONS
- RelationReloadClassinfo(relation);
-#endif /* ENABLE_REINDEX_NAILED_RELATIONS */
- return;
- }
-
- /*
- * Remove relation from hash tables
- *
- * Note: we might be reinserting it momentarily, but we must not have it
- * visible in the hash tables until it's valid again, so don't try to
- * optimize this away...
- */
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
- RelationCacheDelete(relation);
- MemoryContextSwitchTo(oldcxt);
-
- /* Clear out catcache's entries for this relation */
- CatalogCacheFlushRelation(RelationGetRelid(relation));
-
- /*
- * Free all the subsidiary data structures of the relcache entry. We
- * cannot free rd_att if we are trying to rebuild the entry, however,
- * because pointers to it may be cached in various places. The trigger
- * manager might also have pointers into the trigdesc, and the rule
- * manager might have pointers into the rewrite rules. So to begin
- * with, we can only get rid of these fields:
- */
- if (relation->rd_index)
- pfree(relation->rd_index);
- if (relation->rd_am)
- pfree(relation->rd_am);
- if (relation->rd_rel)
- pfree(relation->rd_rel);
- freeList(relation->rd_indexlist);
- if (relation->rd_indexcxt)
- MemoryContextDelete(relation->rd_indexcxt);
-
- /*
- * If we're really done with the relcache entry, blow it away. But if
- * someone is still using it, reconstruct the whole deal without
- * moving the physical RelationData record (so that the someone's
- * pointer is still valid).
- */
- if (!rebuildIt)
- {
- /* ok to zap remaining substructure */
- FreeTupleDesc(relation->rd_att);
- if (relation->rd_rulescxt)
- MemoryContextDelete(relation->rd_rulescxt);
- FreeTriggerDesc(relation->trigdesc);
- pfree(relation);
- }
- else
- {
- /*
- * When rebuilding an open relcache entry, must preserve ref count
- * and myxactonly flag. Also attempt to preserve the tupledesc,
- * rewrite rules, and trigger substructures in place. Furthermore
- * we save/restore rd_nblocks (in case it is a local relation)
- * *and* call RelationGetNumberOfBlocks (in case it isn't).
- */
- int old_refcnt = relation->rd_refcnt;
- bool old_myxactonly = relation->rd_myxactonly;
- TupleDesc old_att = relation->rd_att;
- RuleLock *old_rules = relation->rd_rules;
- MemoryContext old_rulescxt = relation->rd_rulescxt;
- TriggerDesc *old_trigdesc = relation->trigdesc;
- BlockNumber old_nblocks = relation->rd_nblocks;
- RelationBuildDescInfo buildinfo;
-
- buildinfo.infotype = INFO_RELID;
- buildinfo.i.info_id = RelationGetRelid(relation);
-
- if (RelationBuildDesc(buildinfo, relation) != relation)
- {
- /* Should only get here if relation was deleted */
- FreeTupleDesc(old_att);
- if (old_rulescxt)
- MemoryContextDelete(old_rulescxt);
- FreeTriggerDesc(old_trigdesc);
- pfree(relation);
- elog(ERROR, "RelationClearRelation: relation %u deleted while still in use",
- buildinfo.i.info_id);
- }
- RelationSetReferenceCount(relation, old_refcnt);
- relation->rd_myxactonly = old_myxactonly;
- if (equalTupleDescs(old_att, relation->rd_att))
- {
- FreeTupleDesc(relation->rd_att);
- relation->rd_att = old_att;
- }
- else
- FreeTupleDesc(old_att);
- if (equalRuleLocks(old_rules, relation->rd_rules))
- {
- if (relation->rd_rulescxt)
- MemoryContextDelete(relation->rd_rulescxt);
- relation->rd_rules = old_rules;
- relation->rd_rulescxt = old_rulescxt;
- }
- else
- {
- if (old_rulescxt)
- MemoryContextDelete(old_rulescxt);
- }
- if (equalTriggerDescs(old_trigdesc, relation->trigdesc))
- {
- FreeTriggerDesc(relation->trigdesc);
- relation->trigdesc = old_trigdesc;
- }
- else
- FreeTriggerDesc(old_trigdesc);
- relation->rd_nblocks = old_nblocks;
-
- /*
- * this is kind of expensive, but I think we must do it in case
- * relation has been truncated...
- */
- relation->rd_nblocks = RelationGetNumberOfBlocks(relation);
- }
-}
-
-/*
- * RelationFlushRelation
- *
- * Rebuild the relation if it is open (refcount > 0), else blow it away.
- */
-static void
-RelationFlushRelation(Relation relation)
-{
- bool rebuildIt;
-
- if (relation->rd_myxactonly)
- {
- /*
- * Local rels should always be rebuilt, not flushed; the relcache
- * entry must live until RelationPurgeLocalRelation().
- */
- rebuildIt = true;
- }
- else
- {
- /*
- * Nonlocal rels can be dropped from the relcache if not open.
- */
- rebuildIt = !RelationHasReferenceCountZero(relation);
- }
-
- RelationClearRelation(relation, rebuildIt);
-}
-
-/*
- * RelationForgetRelation -
- *
- * RelationClearRelation + if the relation is myxactonly then
- * remove the relation descriptor from the newly created
- * relation list.
- */
-void
-RelationForgetRelation(Oid rid)
-{
- Relation relation;
-
- RelationIdCacheLookup(rid, relation);
-
- if (!PointerIsValid(relation))
- return; /* not in cache, nothing to do */
-
- if (!RelationHasReferenceCountZero(relation))
- elog(ERROR, "RelationForgetRelation: relation %u is still open", rid);
-
- /* If local, remove from list */
- if (relation->rd_myxactonly)
- {
- List *curr;
- List *prev = NIL;
-
- foreach(curr, newlyCreatedRelns)
- {
- Relation reln = lfirst(curr);
-
- Assert(reln != NULL && reln->rd_myxactonly);
- if (RelationGetRelid(reln) == rid)
- break;
- prev = curr;
- }
- if (curr == NIL)
- elog(ERROR, "Local relation %s not found in list",
- RelationGetRelationName(relation));
- if (prev == NIL)
- newlyCreatedRelns = lnext(newlyCreatedRelns);
- else
- lnext(prev) = lnext(curr);
- pfree(curr);
- }
-
- /* Unconditionally destroy the relcache entry */
- RelationClearRelation(relation, false);
-}
-
-/*
- * RelationIdInvalidateRelationCacheByRelationId
- *
- * This routine is invoked for SI cache flush messages.
- *
- * We used to skip local relations, on the grounds that they could
- * not be targets of cross-backend SI update messages; but it seems
- * safer to process them, so that our *own* SI update messages will
- * have the same effects during CommandCounterIncrement for both
- * local and nonlocal relations.
- */
-void
-RelationIdInvalidateRelationCacheByRelationId(Oid relationId)
-{
- Relation relation;
-
- RelationIdCacheLookup(relationId, relation);
-
- if (PointerIsValid(relation))
- {
- relcacheInvalsReceived++;
- RelationFlushRelation(relation);
- }
-}
-
-/*
- * RelationCacheInvalidate
- * Blow away cached relation descriptors that have zero reference counts,
- * and rebuild those with positive reference counts.
- *
- * This is currently used only to recover from SI message buffer overflow,
- * so we do not touch transaction-local relations; they cannot be targets
- * of cross-backend SI updates (and our own updates now go through a
- * separate linked list that isn't limited by the SI message buffer size).
- *
- * We do this in two phases: the first pass deletes deletable items, and
- * the second one rebuilds the rebuildable items. This is essential for
- * safety, because hash_seq_search only copes with concurrent deletion of
- * the element it is currently visiting. If a second SI overflow were to
- * occur while we are walking the table, resulting in recursive entry to
- * this routine, we could crash because the inner invocation blows away
- * the entry next to be visited by the outer scan. But this way is OK,
- * because (a) during the first pass we won't process any more SI messages,
- * so hash_seq_search will complete safely; (b) during the second pass we
- * only hold onto pointers to nondeletable entries.
- */
-void
-RelationCacheInvalidate(void)
-{
- HASH_SEQ_STATUS status;
- RelIdCacheEnt *idhentry;
- Relation relation;
- List *rebuildList = NIL;
- List *l;
-
- /* Phase 1 */
- hash_seq_init(&status, RelationIdCache);
-
- while ((idhentry = (RelIdCacheEnt *) hash_seq_search(&status)) != NULL)
- {
- relation = idhentry->reldesc;
-
- /* Ignore xact-local relations, since they are never SI targets */
- if (relation->rd_myxactonly)
- continue;
-
- relcacheInvalsReceived++;
-
- if (RelationHasReferenceCountZero(relation))
- {
- /* Delete this entry immediately */
- RelationClearRelation(relation, false);
- }
- else
- {
- /* Add entry to list of stuff to rebuild in second pass */
- rebuildList = lcons(relation, rebuildList);
- }
- }
-
- /* Phase 2: rebuild the items found to need rebuild in phase 1 */
- foreach(l, rebuildList)
- {
- relation = (Relation) lfirst(l);
- RelationClearRelation(relation, true);
- }
- freeList(rebuildList);
-}
-
-/*
- * RelationCacheAbort
- *
- * Clean up the relcache at transaction abort.
- *
- * What we need to do here is reset relcache entry ref counts to
- * their normal not-in-a-transaction state. A ref count may be
- * too high because some routine was exited by elog() between
- * incrementing and decrementing the count.
- *
- * XXX Maybe we should do this at transaction commit, too, in case
- * someone forgets to decrement a refcount in a non-error path?
- */
-void
-RelationCacheAbort(void)
-{
- HASH_SEQ_STATUS status;
- RelIdCacheEnt *idhentry;
-
- hash_seq_init(&status, RelationIdCache);
-
- while ((idhentry = (RelIdCacheEnt *) hash_seq_search(&status)) != NULL)
- {
- Relation relation = idhentry->reldesc;
-
- if (relation->rd_isnailed)
- RelationSetReferenceCount(relation, 1);
- else
- RelationSetReferenceCount(relation, 0);
- }
-}
-
-/*
- * RelationBuildLocalRelation
- * Build a relcache entry for an about-to-be-created relation,
- * and enter it into the relcache.
- */
-Relation
-RelationBuildLocalRelation(const char *relname,
- Oid relnamespace,
- TupleDesc tupDesc,
- Oid relid, Oid dbid,
- RelFileNode rnode,
- bool nailit)
-{
- Relation rel;
- MemoryContext oldcxt;
- int natts = tupDesc->natts;
- int i;
-
- AssertArg(natts > 0);
-
- /*
- * switch to the cache context to create the relcache entry.
- */
- if (!CacheMemoryContext)
- CreateCacheMemoryContext();
-
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
-
- /*
- * allocate a new relation descriptor.
- */
- rel = (Relation) palloc(sizeof(RelationData));
- MemSet((char *) rel, 0, sizeof(RelationData));
- rel->rd_targblock = InvalidBlockNumber;
-
- /* make sure relation is marked as having no open file yet */
- rel->rd_fd = -1;
-
- RelationSetReferenceCount(rel, 1);
-
- /*
- * nail the reldesc if this is a bootstrap create reln and we may need
- * it in the cache later on in the bootstrap process so we don't ever
- * want it kicked out. e.g. pg_attribute!!!
- */
- if (nailit)
- rel->rd_isnailed = true;
-
- /*
- * create a new tuple descriptor from the one passed in. We do this
- * partly to copy it into the cache context, and partly because the
- * new relation can't have any defaults or constraints yet; they
- * have to be added in later steps, because they require additions
- * to multiple system catalogs. We can copy attnotnull constraints
- * here, however.
- */
- rel->rd_att = CreateTupleDescCopy(tupDesc);
- for (i = 0; i < natts; i++)
- rel->rd_att->attrs[i]->attnotnull = tupDesc->attrs[i]->attnotnull;
-
- /*
- * initialize relation tuple form (caller may add/override data later)
- */
- rel->rd_rel = (Form_pg_class) palloc(CLASS_TUPLE_SIZE);
- MemSet((char *) rel->rd_rel, 0, CLASS_TUPLE_SIZE);
-
- namestrcpy(&rel->rd_rel->relname, relname);
- rel->rd_rel->relnamespace = relnamespace;
-
- rel->rd_rel->relkind = RELKIND_UNCATALOGED;
- rel->rd_rel->relhasoids = true;
- rel->rd_rel->relnatts = natts;
- rel->rd_rel->reltype = InvalidOid;
-
- /*
- * Insert relation physical and logical identifiers (OIDs) into the
- * right places.
- */
- rel->rd_rel->relisshared = (dbid == InvalidOid);
-
- RelationGetRelid(rel) = relid;
-
- for (i = 0; i < natts; i++)
- rel->rd_att->attrs[i]->attrelid = relid;
-
- rel->rd_node = rnode;
- rel->rd_rel->relfilenode = rnode.relNode;
-
- RelationInitLockInfo(rel); /* see lmgr.c */
-
- /*
- * Okay to insert into the relcache hash tables.
- */
- RelationCacheInsert(rel);
-
- /*
- * we've just created the relation. It is invisible to anyone else
- * before the transaction is committed. Setting rd_myxactonly allows
- * us to use the local buffer manager for select/insert/etc before the
- * end of transaction. (We also need to keep track of relations
- * created during a transaction and do the necessary clean up at the
- * end of the transaction.) - ay 3/95
- */
- rel->rd_myxactonly = true;
- newlyCreatedRelns = lcons(rel, newlyCreatedRelns);
-
- /*
- * done building relcache entry.
- */
- MemoryContextSwitchTo(oldcxt);
-
- return rel;
-}
-
-/*
- * RelationPurgeLocalRelation -
- * find all the Relation descriptors marked rd_myxactonly and reset them.
- * This should be called at the end of a transaction (commit/abort) when
- * the "local" relations will become visible to others and the multi-user
- * buffer pool should be used.
- */
-void
-RelationPurgeLocalRelation(bool xactCommitted)
-{
- while (newlyCreatedRelns)
- {
- List *l = newlyCreatedRelns;
- Relation reln = lfirst(l);
-
- newlyCreatedRelns = lnext(newlyCreatedRelns);
- pfree(l);
-
- Assert(reln != NULL && reln->rd_myxactonly);
-
- reln->rd_myxactonly = false; /* mark it not on list anymore */
-
- /*
- * XXX while we clearly must throw out new Relation entries at
- * xact abort, it's not clear why we need to do it at commit.
- * Could this be improved?
- */
- if (!IsBootstrapProcessingMode())
- RelationClearRelation(reln, false);
- }
-}
-
-/*
- * RelationCacheInitialize
- *
- * This initializes the relation descriptor cache. At the time
- * that this is invoked, we can't do database access yet (mainly
- * because the transaction subsystem is not up), so we can't get
- * "real" info. However it's okay to read the pg_internal.init
- * cache file, if one is available. Otherwise we make phony
- * entries for the minimum set of nailed-in-cache relations.
- */
-
-#define INITRELCACHESIZE 400
-
-void
-RelationCacheInitialize(void)
-{
- MemoryContext oldcxt;
- HASHCTL ctl;
-
- /*
- * switch to cache memory context
- */
- if (!CacheMemoryContext)
- CreateCacheMemoryContext();
-
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
-
- /*
- * create hashtables that index the relcache
- */
- MemSet(&ctl, 0, sizeof(ctl));
- ctl.keysize = sizeof(NameData);
- ctl.entrysize = sizeof(RelNameCacheEnt);
- RelationSysNameCache = hash_create("Relcache by name", INITRELCACHESIZE,
- &ctl, HASH_ELEM);
-
- ctl.keysize = sizeof(Oid);
- ctl.entrysize = sizeof(RelIdCacheEnt);
- ctl.hash = tag_hash;
- RelationIdCache = hash_create("Relcache by OID", INITRELCACHESIZE,
- &ctl, HASH_ELEM | HASH_FUNCTION);
-
- ctl.keysize = sizeof(RelFileNode);
- ctl.entrysize = sizeof(RelNodeCacheEnt);
- ctl.hash = tag_hash;
- RelationNodeCache = hash_create("Relcache by rnode", INITRELCACHESIZE,
- &ctl, HASH_ELEM | HASH_FUNCTION);
-
- /*
- * Try to load the relcache cache file. If successful, we're done
- * for now. Otherwise, initialize the cache with pre-made descriptors
- * for the critical "nailed-in" system catalogs.
- */
- if (IsBootstrapProcessingMode() ||
- ! load_relcache_init_file())
- {
- formrdesc(RelationRelationName,
- Natts_pg_class, Desc_pg_class);
- formrdesc(AttributeRelationName,
- Natts_pg_attribute, Desc_pg_attribute);
- formrdesc(ProcedureRelationName,
- Natts_pg_proc, Desc_pg_proc);
- formrdesc(TypeRelationName,
- Natts_pg_type, Desc_pg_type);
-
-#define NUM_CRITICAL_RELS 4 /* fix if you change list above */
- }
-
- MemoryContextSwitchTo(oldcxt);
-}
-
-/*
- * RelationCacheInitializePhase2
- *
- * This is called as soon as the catcache and transaction system
- * are functional. At this point we can actually read data from
- * the system catalogs. Update the relcache entries made during
- * RelationCacheInitialize, and make sure we have entries for the
- * critical system indexes.
- */
-void
-RelationCacheInitializePhase2(void)
-{
- HASH_SEQ_STATUS status;
- RelIdCacheEnt *idhentry;
-
- if (IsBootstrapProcessingMode())
- return;
-
- /*
- * If we didn't get the critical system indexes loaded into relcache,
- * do so now. These are critical because the catcache depends on them
- * for catcache fetches that are done during relcache load. Thus, we
- * have an infinite-recursion problem. We can break the recursion
- * by doing heapscans instead of indexscans at certain key spots.
- * To avoid hobbling performance, we only want to do that until we
- * have the critical indexes loaded into relcache. Thus, the flag
- * criticalRelcachesBuilt is used to decide whether to do heapscan
- * or indexscan at the key spots, and we set it true after we've loaded
- * the critical indexes.
- *
- * The critical indexes are marked as "nailed in cache", partly to make
- * it easy for load_relcache_init_file to count them, but mainly
- * because we cannot flush and rebuild them once we've set
- * criticalRelcachesBuilt to true. (NOTE: perhaps it would be possible
- * to reload them by temporarily setting criticalRelcachesBuilt to
- * false again. For now, though, we just nail 'em in.)
- */
- if (! criticalRelcachesBuilt)
- {
- RelationBuildDescInfo buildinfo;
- Relation ird;
-
-#define LOAD_CRIT_INDEX(indname) \
- do { \
- buildinfo.infotype = INFO_RELNAME; \
- buildinfo.i.info_name = (indname); \
- ird = RelationBuildDesc(buildinfo, NULL); \
- ird->rd_isnailed = true; \
- RelationSetReferenceCount(ird, 1); \
- } while (0)
-
- LOAD_CRIT_INDEX(ClassNameNspIndex);
- LOAD_CRIT_INDEX(ClassOidIndex);
- LOAD_CRIT_INDEX(AttributeRelidNumIndex);
- LOAD_CRIT_INDEX(IndexRelidIndex);
- LOAD_CRIT_INDEX(AccessMethodStrategyIndex);
- LOAD_CRIT_INDEX(AccessMethodProcedureIndex);
- LOAD_CRIT_INDEX(OperatorOidIndex);
-
-#define NUM_CRITICAL_INDEXES 7 /* fix if you change list above */
-
- criticalRelcachesBuilt = true;
- }
-
- /*
- * Now, scan all the relcache entries and update anything that might
- * be wrong in the results from formrdesc or the relcache cache file.
- * If we faked up relcache entries using formrdesc, then read
- * the real pg_class rows and replace the fake entries with them.
- * Also, if any of the relcache entries have rules or triggers,
- * load that info the hard way since it isn't recorded in the cache file.
- */
- hash_seq_init(&status, RelationIdCache);
-
- while ((idhentry = (RelIdCacheEnt *) hash_seq_search(&status)) != NULL)
- {
- Relation relation = idhentry->reldesc;
-
- /*
- * If it's a faked-up entry, read the real pg_class tuple.
- */
- if (needNewCacheFile && relation->rd_isnailed)
- {
- HeapTuple htup;
- Form_pg_class relp;
-
- htup = SearchSysCache(RELOID,
- ObjectIdGetDatum(RelationGetRelid(relation)),
- 0, 0, 0);
- if (!HeapTupleIsValid(htup))
- elog(FATAL, "RelationCacheInitializePhase2: no pg_class entry for %s",
- RelationGetRelationName(relation));
- relp = (Form_pg_class) GETSTRUCT(htup);
- /*
- * Copy tuple to relation->rd_rel. (See notes in
- * AllocateRelationDesc())
- */
- Assert(relation->rd_rel != NULL);
- memcpy((char *) relation->rd_rel, (char *) relp, CLASS_TUPLE_SIZE);
-
- ReleaseSysCache(htup);
- }
-
- /*
- * Fix data that isn't saved in relcache cache file.
- */
- if (relation->rd_rel->relhasrules && relation->rd_rules == NULL)
- RelationBuildRuleLock(relation);
- if (relation->rd_rel->reltriggers > 0 && relation->trigdesc == NULL)
- RelationBuildTriggers(relation);
- }
-}
-
-/*
- * RelationCacheInitializePhase3
- *
- * Final step of relcache initialization: write out a new relcache
- * cache file if one is needed.
- */
-void
-RelationCacheInitializePhase3(void)
-{
- if (IsBootstrapProcessingMode())
- return;
-
- if (needNewCacheFile)
- {
- /*
- * Force all the catcaches to finish initializing and thereby
- * open the catalogs and indexes they use. This will preload
- * the relcache with entries for all the most important system
- * catalogs and indexes, so that the init file will be most
- * useful for future backends.
- */
- InitCatalogCachePhase2();
-
- /* now write the file */
- write_relcache_init_file();
- }
-}
-
-
-/* used by XLogInitCache */
-void CreateDummyCaches(void);
-void DestroyDummyCaches(void);
-
-void
-CreateDummyCaches(void)
-{
- MemoryContext oldcxt;
- HASHCTL ctl;
-
- if (!CacheMemoryContext)
- CreateCacheMemoryContext();
-
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
-
- MemSet(&ctl, 0, sizeof(ctl));
- ctl.keysize = sizeof(NameData);
- ctl.entrysize = sizeof(RelNameCacheEnt);
- RelationSysNameCache = hash_create("Relcache by name", INITRELCACHESIZE,
- &ctl, HASH_ELEM);
-
- ctl.keysize = sizeof(Oid);
- ctl.entrysize = sizeof(RelIdCacheEnt);
- ctl.hash = tag_hash;
- RelationIdCache = hash_create("Relcache by OID", INITRELCACHESIZE,
- &ctl, HASH_ELEM | HASH_FUNCTION);
-
- ctl.keysize = sizeof(RelFileNode);
- ctl.entrysize = sizeof(RelNodeCacheEnt);
- ctl.hash = tag_hash;
- RelationNodeCache = hash_create("Relcache by rnode", INITRELCACHESIZE,
- &ctl, HASH_ELEM | HASH_FUNCTION);
-
- MemoryContextSwitchTo(oldcxt);
-}
-
-void
-DestroyDummyCaches(void)
-{
- MemoryContext oldcxt;
-
- if (!CacheMemoryContext)
- return;
-
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
-
- if (RelationIdCache)
- hash_destroy(RelationIdCache);
- if (RelationSysNameCache)
- hash_destroy(RelationSysNameCache);
- if (RelationNodeCache)
- hash_destroy(RelationNodeCache);
-
- RelationIdCache = RelationSysNameCache = RelationNodeCache = NULL;
-
- MemoryContextSwitchTo(oldcxt);
-}
-
-static void
-AttrDefaultFetch(Relation relation)
-{
- AttrDefault *attrdef = relation->rd_att->constr->defval;
- int ndef = relation->rd_att->constr->num_defval;
- Relation adrel;
- SysScanDesc adscan;
- ScanKeyData skey;
- HeapTuple htup;
- Datum val;
- bool isnull;
- int found;
- int i;
-
- ScanKeyEntryInitialize(&skey,
- (bits16) 0x0,
- (AttrNumber) Anum_pg_attrdef_adrelid,
- (RegProcedure) F_OIDEQ,
- ObjectIdGetDatum(RelationGetRelid(relation)));
-
- adrel = heap_openr(AttrDefaultRelationName, AccessShareLock);
- adscan = systable_beginscan(adrel, AttrDefaultIndex, true,
- SnapshotNow,
- 1, &skey);
- found = 0;
-
- while (HeapTupleIsValid(htup = systable_getnext(adscan)))
- {
- Form_pg_attrdef adform = (Form_pg_attrdef) GETSTRUCT(htup);
-
- found++;
- for (i = 0; i < ndef; i++)
- {
- if (adform->adnum != attrdef[i].adnum)
- continue;
- if (attrdef[i].adbin != NULL)
- elog(WARNING, "AttrDefaultFetch: second record found for attr %s in rel %s",
- NameStr(relation->rd_att->attrs[adform->adnum - 1]->attname),
- RelationGetRelationName(relation));
-
- val = fastgetattr(htup,
- Anum_pg_attrdef_adbin,
- adrel->rd_att, &isnull);
- if (isnull)
- elog(WARNING, "AttrDefaultFetch: adbin IS NULL for attr %s in rel %s",
- NameStr(relation->rd_att->attrs[adform->adnum - 1]->attname),
- RelationGetRelationName(relation));
- else
- attrdef[i].adbin = MemoryContextStrdup(CacheMemoryContext,
- DatumGetCString(DirectFunctionCall1(textout,
- val)));
- break;
- }
-
- if (i >= ndef)
- elog(WARNING, "AttrDefaultFetch: unexpected record found for attr %d in rel %s",
- adform->adnum,
- RelationGetRelationName(relation));
- }
-
- systable_endscan(adscan);
- heap_close(adrel, AccessShareLock);
-
- if (found != ndef)
- elog(WARNING, "AttrDefaultFetch: %d record(s) not found for rel %s",
- ndef - found, RelationGetRelationName(relation));
-}
-
-static void
-RelCheckFetch(Relation relation)
-{
- ConstrCheck *check = relation->rd_att->constr->check;
- int ncheck = relation->rd_att->constr->num_check;
- Relation rcrel;
- SysScanDesc rcscan;
- ScanKeyData skey;
- HeapTuple htup;
- Name rcname;
- Datum val;
- bool isnull;
- int found;
-
- ScanKeyEntryInitialize(&skey,
- (bits16) 0x0,
- (AttrNumber) Anum_pg_relcheck_rcrelid,
- (RegProcedure) F_OIDEQ,
- ObjectIdGetDatum(RelationGetRelid(relation)));
-
- rcrel = heap_openr(RelCheckRelationName, AccessShareLock);
- rcscan = systable_beginscan(rcrel, RelCheckIndex, true,
- SnapshotNow,
- 1, &skey);
- found = 0;
-
- while (HeapTupleIsValid(htup = systable_getnext(rcscan)))
- {
- if (found == ncheck)
- elog(ERROR, "RelCheckFetch: unexpected record found for rel %s",
- RelationGetRelationName(relation));
-
- rcname = (Name) fastgetattr(htup,
- Anum_pg_relcheck_rcname,
- rcrel->rd_att, &isnull);
- if (isnull)
- elog(ERROR, "RelCheckFetch: rcname IS NULL for rel %s",
- RelationGetRelationName(relation));
- check[found].ccname = MemoryContextStrdup(CacheMemoryContext,
- NameStr(*rcname));
- val = fastgetattr(htup,
- Anum_pg_relcheck_rcbin,
- rcrel->rd_att, &isnull);
- if (isnull)
- elog(ERROR, "RelCheckFetch: rcbin IS NULL for rel %s",
- RelationGetRelationName(relation));
- check[found].ccbin = MemoryContextStrdup(CacheMemoryContext,
- DatumGetCString(DirectFunctionCall1(textout,
- val)));
- found++;
- }
-
- systable_endscan(rcscan);
- heap_close(rcrel, AccessShareLock);
-
- if (found != ncheck)
- elog(ERROR, "RelCheckFetch: %d record(s) not found for rel %s",
- ncheck - found, RelationGetRelationName(relation));
-}
-
-/*
- * RelationGetIndexList -- get a list of OIDs of indexes on this relation
- *
- * The index list is created only if someone requests it. We scan pg_index
- * to find relevant indexes, and add the list to the relcache entry so that
- * we won't have to compute it again. Note that shared cache inval of a
- * relcache entry will delete the old list and set rd_indexfound to false,
- * so that we must recompute the index list on next request. This handles
- * creation or deletion of an index.
- *
- * The returned list is guaranteed to be sorted in order by OID. This is
- * needed by the executor, since for index types that we obtain exclusive
- * locks on when updating the index, all backends must lock the indexes in
- * the same order or we will get deadlocks (see ExecOpenIndices()). Any
- * consistent ordering would do, but ordering by OID is easy.
- *
- * Since shared cache inval causes the relcache's copy of the list to go away,
- * we return a copy of the list palloc'd in the caller's context. The caller
- * may freeList() the returned list after scanning it. This is necessary
- * since the caller will typically be doing syscache lookups on the relevant
- * indexes, and syscache lookup could cause SI messages to be processed!
- */
-List *
-RelationGetIndexList(Relation relation)
-{
- Relation indrel;
- SysScanDesc indscan;
- ScanKeyData skey;
- HeapTuple htup;
- List *result;
- MemoryContext oldcxt;
-
- /* Quick exit if we already computed the list. */
- if (relation->rd_indexfound)
- return listCopy(relation->rd_indexlist);
-
- /*
- * We build the list we intend to return (in the caller's context)
- * while doing the scan. After successfully completing the scan, we
- * copy that list into the relcache entry. This avoids cache-context
- * memory leakage if we get some sort of error partway through.
- */
- result = NIL;
-
- /* Prepare to scan pg_index for entries having indrelid = this rel. */
- ScanKeyEntryInitialize(&skey,
- (bits16) 0x0,
- (AttrNumber) Anum_pg_index_indrelid,
- (RegProcedure) F_OIDEQ,
- ObjectIdGetDatum(RelationGetRelid(relation)));
-
- indrel = heap_openr(IndexRelationName, AccessShareLock);
- indscan = systable_beginscan(indrel, IndexIndrelidIndex, true,
- SnapshotNow,
- 1, &skey);
-
- while (HeapTupleIsValid(htup = systable_getnext(indscan)))
- {
- Form_pg_index index = (Form_pg_index) GETSTRUCT(htup);
-
- result = insert_ordered_oid(result, index->indexrelid);
- }
-
- systable_endscan(indscan);
- heap_close(indrel, AccessShareLock);
-
- /* Now save a copy of the completed list in the relcache entry. */
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
- relation->rd_indexlist = listCopy(result);
- relation->rd_indexfound = true;
- MemoryContextSwitchTo(oldcxt);
-
- return result;
-}
-
-/*
- * insert_ordered_oid
- * Insert a new Oid into a sorted list of Oids, preserving ordering
- *
- * Building the ordered list this way is O(N^2), but with a pretty small
- * constant, so for the number of entries we expect it will probably be
- * faster than trying to apply qsort(). Most tables don't have very many
- * indexes...
- */
-static List *
-insert_ordered_oid(List *list, Oid datum)
-{
- List *l;
-
- /* Does the datum belong at the front? */
- if (list == NIL || datum < (Oid) lfirsti(list))
- return lconsi(datum, list);
- /* No, so find the entry it belongs after */
- l = list;
- for (;;)
- {
- List *n = lnext(l);
-
- if (n == NIL || datum < (Oid) lfirsti(n))
- break; /* it belongs before n */
- l = n;
- }
- /* Insert datum into list after item l */
- lnext(l) = lconsi(datum, lnext(l));
- return list;
-}
-
-
-/*
- * load_relcache_init_file, write_relcache_init_file
- *
- * In late 1992, we started regularly having databases with more than
- * a thousand classes in them. With this number of classes, it became
- * critical to do indexed lookups on the system catalogs.
- *
- * Bootstrapping these lookups is very hard. We want to be able to
- * use an index on pg_attribute, for example, but in order to do so,
- * we must have read pg_attribute for the attributes in the index,
- * which implies that we need to use the index.
- *
- * In order to get around the problem, we do the following:
- *
- * + When the database system is initialized (at initdb time), we
- * don't use indexes. We do sequential scans.
- *
- * + When the backend is started up in normal mode, we load an image
- * of the appropriate relation descriptors, in internal format,
- * from an initialization file in the data/base/... directory.
- *
- * + If the initialization file isn't there, then we create the
- * relation descriptors using sequential scans and write 'em to
- * the initialization file for use by subsequent backends.
- *
- * We could dispense with the initialization file and just build the
- * critical reldescs the hard way on every backend startup, but that
- * slows down backend startup noticeably.
- *
- * We can in fact go further, and save more relcache entries than
- * just the ones that are absolutely critical; this allows us to speed
- * up backend startup by not having to build such entries the hard way.
- * Presently, all the catalog and index entries that are referred to
- * by catcaches are stored in the initialization file.
- *
- * As of v6.5, vacuum.c deletes the initialization file at completion
- * of a VACUUM, so that it will be rebuilt at the next backend startup.
- * This ensures that vacuum-collected stats for the system catalogs
- * and indexes will be seen by backends started later.
- */
-
-/*
- * load_relcache_init_file -- attempt to load cache from the init file
- *
- * If successful, return TRUE and set criticalRelcachesBuilt to true.
- * If not successful, return FALSE and set needNewCacheFile to true.
- *
- * NOTE: we assume we are already switched into CacheMemoryContext.
- */
-static bool
-load_relcache_init_file(void)
-{
- FILE *fp;
- char initfilename[MAXPGPATH];
- Relation *rels;
- int relno,
- num_rels,
- max_rels,
- nailed_rels,
- nailed_indexes;
- int i;
-
- snprintf(initfilename, sizeof(initfilename), "%s/%s",
- DatabasePath, RELCACHE_INIT_FILENAME);
-
- fp = AllocateFile(initfilename, PG_BINARY_R);
- if (fp == NULL)
- {
- needNewCacheFile = true;
- return false;
- }
-
- /*
- * Read the index relcache entries from the file. Note we will not
- * enter any of them into the cache if the read fails partway through;
- * this helps to guard against broken init files.
- */
- max_rels = 100;
- rels = (Relation *) palloc(max_rels * sizeof(Relation));
- num_rels = 0;
- nailed_rels = nailed_indexes = 0;
- initFileRelationIds = NIL;
-
- for (relno = 0; ; relno++)
- {
- Size len;
- size_t nread;
- Relation rel;
- Form_pg_class relform;
-
- /* first read the relation descriptor length */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- {
- if (nread == 0)
- break; /* end of file */
- goto read_failed;
- }
-
- /* safety check for incompatible relcache layout */
- if (len != sizeof(RelationData))
- goto read_failed;
-
- /* allocate another relcache header */
- if (num_rels >= max_rels)
- {
- max_rels *= 2;
- rels = (Relation *) repalloc(rels, max_rels * sizeof(Relation));
- }
-
- rel = rels[num_rels++] = (Relation) palloc(len);
-
- /* then, read the Relation structure */
- if ((nread = fread(rel, 1, len, fp)) != len)
- goto read_failed;
-
- /* next read the relation tuple form */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
-
- relform = (Form_pg_class) palloc(len);
- if ((nread = fread(relform, 1, len, fp)) != len)
- goto read_failed;
-
- rel->rd_rel = relform;
-
- /* initialize attribute tuple forms */
- rel->rd_att = CreateTemplateTupleDesc(relform->relnatts);
-
- /* next read all the attribute tuple form data entries */
- for (i = 0; i < relform->relnatts; i++)
- {
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
-
- rel->rd_att->attrs[i] = (Form_pg_attribute) palloc(len);
-
- if ((nread = fread(rel->rd_att->attrs[i], 1, len, fp)) != len)
- goto read_failed;
- }
-
- /* If it's an index, there's more to do */
- if (rel->rd_rel->relkind == RELKIND_INDEX)
- {
- Form_pg_am am;
- MemoryContext indexcxt;
- IndexStrategy strat;
- Oid *operator;
- RegProcedure *support;
- int nstrategies,
- nsupport;
-
- /* Count nailed indexes to ensure we have 'em all */
- if (rel->rd_isnailed)
- nailed_indexes++;
-
- /* next, read the pg_index tuple form */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
-
- rel->rd_index = (Form_pg_index) palloc(len);
- if ((nread = fread(rel->rd_index, 1, len, fp)) != len)
- goto read_failed;
-
- /* next, read the access method tuple form */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
-
- am = (Form_pg_am) palloc(len);
- if ((nread = fread(am, 1, len, fp)) != len)
- goto read_failed;
- rel->rd_am = am;
-
- /*
- * prepare index info context --- parameters should match
- * RelationInitIndexAccessInfo
- */
- indexcxt = AllocSetContextCreate(CacheMemoryContext,
- RelationGetRelationName(rel),
- 0, /* minsize */
- 512, /* initsize */
- 1024); /* maxsize */
- rel->rd_indexcxt = indexcxt;
-
- /* next, read the index strategy map */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
-
- strat = (IndexStrategy) MemoryContextAlloc(indexcxt, len);
- if ((nread = fread(strat, 1, len, fp)) != len)
- goto read_failed;
-
- /* have to invalidate any FmgrInfo data in the strategy maps */
- nstrategies = am->amstrategies * relform->relnatts;
- for (i = 0; i < nstrategies; i++)
- strat->strategyMapData[i].entry[0].sk_func.fn_oid = InvalidOid;
-
- rel->rd_istrat = strat;
-
- /* next, read the vector of operator OIDs */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
-
- operator = (Oid *) MemoryContextAlloc(indexcxt, len);
- if ((nread = fread(operator, 1, len, fp)) != len)
- goto read_failed;
-
- rel->rd_operator = operator;
-
- /* finally, read the vector of support procedures */
- if ((nread = fread(&len, 1, sizeof(len), fp)) != sizeof(len))
- goto read_failed;
- support = (RegProcedure *) MemoryContextAlloc(indexcxt, len);
- if ((nread = fread(support, 1, len, fp)) != len)
- goto read_failed;
-
- rel->rd_support = support;
-
- /* add a zeroed support-fmgr-info vector */
- nsupport = relform->relnatts * am->amsupport;
- rel->rd_supportinfo = (FmgrInfo *)
- MemoryContextAlloc(indexcxt, nsupport * sizeof(FmgrInfo));
- MemSet(rel->rd_supportinfo, 0, nsupport * sizeof(FmgrInfo));
- }
- else
- {
- /* Count nailed rels to ensure we have 'em all */
- if (rel->rd_isnailed)
- nailed_rels++;
-
- Assert(rel->rd_index == NULL);
- Assert(rel->rd_am == NULL);
- Assert(rel->rd_indexcxt == NULL);
- Assert(rel->rd_istrat == NULL);
- Assert(rel->rd_operator == NULL);
- Assert(rel->rd_support == NULL);
- Assert(rel->rd_supportinfo == NULL);
- }
-
- /*
- * Rules and triggers are not saved (mainly because the internal
- * format is complex and subject to change). They must be rebuilt
- * if needed by RelationCacheInitializePhase2. This is not expected
- * to be a big performance hit since few system catalogs have such.
- */
- rel->rd_rules = NULL;
- rel->rd_rulescxt = NULL;
- rel->trigdesc = NULL;
-
- /*
- * Reset transient-state fields in the relcache entry
- */
- rel->rd_fd = -1;
- rel->rd_targblock = InvalidBlockNumber;
- if (rel->rd_isnailed)
- RelationSetReferenceCount(rel, 1);
- else
- RelationSetReferenceCount(rel, 0);
- rel->rd_indexfound = false;
- rel->rd_indexlist = NIL;
- MemSet(&rel->pgstat_info, 0, sizeof(rel->pgstat_info));
-
- /*
- * Make sure database ID is correct. This is needed in case the
- * pg_internal.init file was copied from some other database by
- * CREATE DATABASE.
- */
- if (rel->rd_rel->relisshared)
- rel->rd_node.tblNode = InvalidOid;
- else
- rel->rd_node.tblNode = MyDatabaseId;
-
- RelationInitLockInfo(rel);
- }
-
- /*
- * We reached the end of the init file without apparent problem.
- * Did we get the right number of nailed items? (This is a useful
- * crosscheck in case the set of critical rels or indexes changes.)
- */
- if (nailed_rels != NUM_CRITICAL_RELS ||
- nailed_indexes != NUM_CRITICAL_INDEXES)
- goto read_failed;
-
- /*
- * OK, all appears well.
- *
- * Now insert all the new relcache entries into the cache.
- */
- for (relno = 0; relno < num_rels; relno++)
- {
- RelationCacheInsert(rels[relno]);
- /* also make a list of their OIDs, for RelationIdIsInInitFile */
- initFileRelationIds = lconsi((int) RelationGetRelid(rels[relno]),
- initFileRelationIds);
- }
-
- pfree(rels);
- FreeFile(fp);
-
- criticalRelcachesBuilt = true;
- return true;
-
- /*
- * init file is broken, so do it the hard way. We don't bother
- * trying to free the clutter we just allocated; it's not in the
- * relcache so it won't hurt.
- */
-read_failed:
- pfree(rels);
- FreeFile(fp);
-
- needNewCacheFile = true;
- return false;
-}
-
-/*
- * Write out a new initialization file with the current contents
- * of the relcache.
- */
-static void
-write_relcache_init_file(void)
-{
- FILE *fp;
- char tempfilename[MAXPGPATH];
- char finalfilename[MAXPGPATH];
- HASH_SEQ_STATUS status;
- RelIdCacheEnt *idhentry;
- MemoryContext oldcxt;
- int i;
-
- /*
- * We must write a temporary file and rename it into place. Otherwise,
- * another backend starting at about the same time might crash trying
- * to read the partially-complete file.
- */
- snprintf(tempfilename, sizeof(tempfilename), "%s/%s.%d",
- DatabasePath, RELCACHE_INIT_FILENAME, MyProcPid);
- snprintf(finalfilename, sizeof(finalfilename), "%s/%s",
- DatabasePath, RELCACHE_INIT_FILENAME);
-
- unlink(tempfilename); /* in case it exists w/wrong permissions */
-
- fp = AllocateFile(tempfilename, PG_BINARY_W);
- if (fp == NULL)
- {
- /*
- * We used to consider this a fatal error, but we might as well
- * continue with backend startup ...
- */
- elog(WARNING, "Cannot create init file %s: %m\n\tContinuing anyway, but there's something wrong.", tempfilename);
- return;
- }
-
- /*
- * Write all the reldescs (in no particular order).
- */
- hash_seq_init(&status, RelationIdCache);
-
- initFileRelationIds = NIL;
-
- while ((idhentry = (RelIdCacheEnt *) hash_seq_search(&status)) != NULL)
- {
- Relation rel = idhentry->reldesc;
- Form_pg_class relform = rel->rd_rel;
- Size len;
-
- /*
- * first write the relcache entry proper
- */
- len = sizeof(RelationData);
-
- /* first, write the relation descriptor length */
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- descriptor length");
-
- /* next, write out the Relation structure */
- if (fwrite(rel, 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- reldesc");
-
- /* next write the relation tuple form */
- len = sizeof(FormData_pg_class);
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- relation tuple form length");
-
- if (fwrite(relform, 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- relation tuple form");
-
- /* next, do all the attribute tuple form data entries */
- for (i = 0; i < relform->relnatts; i++)
- {
- len = ATTRIBUTE_TUPLE_SIZE;
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- length of attdesc %d", i);
- if (fwrite(rel->rd_att->attrs[i], 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- attdesc %d", i);
- }
-
- /* If it's an index, there's more to do */
- if (rel->rd_rel->relkind == RELKIND_INDEX)
- {
- Form_pg_am am = rel->rd_am;
- HeapTuple tuple;
-
- /*
- * We need to write the index tuple form, but this is a bit
- * tricky since it's a variable-length struct. Rather than
- * hoping to intuit the length, fetch the pg_index tuple
- * afresh using the syscache, and write that.
- */
- tuple = SearchSysCache(INDEXRELID,
- ObjectIdGetDatum(RelationGetRelid(rel)),
- 0, 0, 0);
- if (!HeapTupleIsValid(tuple))
- elog(ERROR, "write_relcache_init_file: no pg_index entry for index %u",
- RelationGetRelid(rel));
- len = tuple->t_len - tuple->t_data->t_hoff;
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- index tuple form length");
- if (fwrite(GETSTRUCT(tuple), 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- index tuple form");
- ReleaseSysCache(tuple);
-
- /* next, write the access method tuple form */
- len = sizeof(FormData_pg_am);
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- am tuple form length");
-
- if (fwrite(am, 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- am tuple form");
-
- /* next, write the index strategy map */
- len = AttributeNumberGetIndexStrategySize(relform->relnatts,
- am->amstrategies);
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- strategy map length");
-
- if (fwrite(rel->rd_istrat, 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- strategy map");
-
- /* next, write the vector of operator OIDs */
- len = relform->relnatts * (am->amstrategies * sizeof(Oid));
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- operator vector length");
-
- if (fwrite(rel->rd_operator, 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- operator vector");
-
- /* finally, write the vector of support procedures */
- len = relform->relnatts * (am->amsupport * sizeof(RegProcedure));
- if (fwrite(&len, 1, sizeof(len), fp) != sizeof(len))
- elog(FATAL, "cannot write init file -- support vector length");
-
- if (fwrite(rel->rd_support, 1, len, fp) != len)
- elog(FATAL, "cannot write init file -- support vector");
- }
-
- /* also make a list of their OIDs, for RelationIdIsInInitFile */
- oldcxt = MemoryContextSwitchTo(CacheMemoryContext);
- initFileRelationIds = lconsi((int) RelationGetRelid(rel),
- initFileRelationIds);
- MemoryContextSwitchTo(oldcxt);
- }
-
- FreeFile(fp);
-
- /*
- * Now we have to check whether the data we've so painstakingly
- * accumulated is already obsolete due to someone else's just-committed
- * catalog changes. If so, we just delete the temp file and leave it
- * to the next backend to try again. (Our own relcache entries will be
- * updated by SI message processing, but we can't be sure whether what
- * we wrote out was up-to-date.)
- *
- * This mustn't run concurrently with RelationCacheInitFileInvalidate,
- * so grab a serialization lock for the duration.
- */
- LWLockAcquire(RelCacheInitLock, LW_EXCLUSIVE);
-
- /* Make sure we have seen all incoming SI messages */
- AcceptInvalidationMessages();
-
- /*
- * If we have received any SI relcache invals since backend start,
- * assume we may have written out-of-date data.
- */
- if (relcacheInvalsReceived == 0L)
- {
- /*
- * OK, rename the temp file to its final name, deleting any
- * previously-existing init file.
- *
- * Note: a failure here is possible under Cygwin, if some other
- * backend is holding open an unlinked-but-not-yet-gone init file.
- * So treat this as a noncritical failure.
- */
- if (rename(tempfilename, finalfilename) < 0)
- {
- elog(WARNING, "Cannot rename init file %s to %s: %m\n\tContinuing anyway, but there's something wrong.", tempfilename, finalfilename);
- /*
- * If we fail, try to clean up the useless temp file; don't bother
- * to complain if this fails too.
- */
- unlink(tempfilename);
- }
- }
- else
- {
- /* Delete the already-obsolete temp file */
- unlink(tempfilename);
- }
-
- LWLockRelease(RelCacheInitLock);
-}
-
-/*
- * Detect whether a given relation (identified by OID) is one of the ones
- * we store in the init file.
- *
- * Note that we effectively assume that all backends running in a database
- * would choose to store the same set of relations in the init file;
- * otherwise there are cases where we'd fail to detect the need for an init
- * file invalidation. This does not seem likely to be a problem in practice.
- */
-bool
-RelationIdIsInInitFile(Oid relationId)
-{
- return intMember((int) relationId, initFileRelationIds);
-}
-
-/*
- * Invalidate (remove) the init file during commit of a transaction that
- * changed one or more of the relation cache entries that are kept in the
- * init file.
- *
- * We actually need to remove the init file twice: once just before sending
- * the SI messages that include relcache inval for such relations, and once
- * just after sending them. The unlink before ensures that a backend that's
- * currently starting cannot read the now-obsolete init file and then miss
- * the SI messages that will force it to update its relcache entries. (This
- * works because the backend startup sequence gets into the PROC array before
- * trying to load the init file.) The unlink after is to synchronize with a
- * backend that may currently be trying to write an init file based on data
- * that we've just rendered invalid. Such a backend will see the SI messages,
- * but we can't leave the init file sitting around to fool later backends.
- *
- * Ignore any failure to unlink the file, since it might not be there if
- * no backend has been started since the last removal.
- */
-void
-RelationCacheInitFileInvalidate(bool beforeSend)
-{
- char initfilename[MAXPGPATH];
-
- snprintf(initfilename, sizeof(initfilename), "%s/%s",
- DatabasePath, RELCACHE_INIT_FILENAME);
-
- if (beforeSend)
- {
- /* no interlock needed here */
- unlink(initfilename);
- }
- else
- {
- /*
- * We need to interlock this against write_relcache_init_file,
- * to guard against possibility that someone renames a new-but-
- * already-obsolete init file into place just after we unlink.
- * With the interlock, it's certain that write_relcache_init_file
- * will notice our SI inval message before renaming into place,
- * or else that we will execute second and successfully unlink
- * the file.
- */
- LWLockAcquire(RelCacheInitLock, LW_EXCLUSIVE);
- unlink(initfilename);
- LWLockRelease(RelCacheInitLock);
- }
-}