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author | CVS to git conversion script <webmaster@postgresql.org> | 2002-06-20 20:29:55 +0000 |
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committer | CVS to git conversion script <webmaster@postgresql.org> | 2002-06-20 20:29:55 +0000 |
commit | 05dedace84ef8c93fea5309c3ac55f889011429b (patch) | |
tree | 4c7f513afbbc03060039a165d1770e11be711773 /src/backend/utils/cache/relcache.c | |
parent | d84fe82230c593f3dc5d7f427849b99d1efa8a0a (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.'
Delete:
COPYRIGHT
GNUmakefile.in
HISTORY
INSTALL
Makefile
README
aclocal.m4
config/ac_func_accept_argtypes.m4
config/c-compiler.m4
config/c-library.m4
config/config.guess
config/config.sub
config/cxx.m4
config/docbook.m4
config/general.m4
config/install-sh
config/java.m4
config/libtool.m4
config/missing
config/mkinstalldirs
config/perl.m4
config/prep_buildtree
config/programs.m4
config/python.m4
config/tcl.m4
configure
configure.in
contrib/Makefile
contrib/README
contrib/array/Makefile
contrib/array/README.array_iterator
contrib/array/array_iterator.c
contrib/array/array_iterator.h
contrib/array/array_iterator.sql.in
contrib/btree_gist/Makefile
contrib/btree_gist/README.btree_gist
contrib/btree_gist/btree_gist.c
contrib/btree_gist/btree_gist.sql.in
contrib/btree_gist/data/test_btree.data
contrib/btree_gist/data/test_btree_ts.data
contrib/btree_gist/expected/btree_gist.out
contrib/btree_gist/sql/btree_gist.sql
contrib/chkpass/Makefile
contrib/chkpass/README.chkpass
contrib/chkpass/chkpass.c
contrib/chkpass/chkpass.sql.in
contrib/contrib-global.mk
contrib/cube/Makefile
contrib/cube/README.cube
contrib/cube/buffer.c
contrib/cube/buffer.h
contrib/cube/cube.c
contrib/cube/cube.sql.in
contrib/cube/cubedata.h
contrib/cube/cubeparse.y
contrib/cube/cubescan.l
contrib/cube/data/test_cube.data
contrib/cube/expected/cube.out
contrib/cube/sql/cube.sql
contrib/dbase/Makefile
contrib/dbase/README.dbf2pg
contrib/dbase/dbf.c
contrib/dbase/dbf.h
contrib/dbase/dbf2pg.1
contrib/dbase/dbf2pg.c
contrib/dbase/endian.c
contrib/dblink/Makefile
contrib/dblink/README.dblink
contrib/dblink/dblink.c
contrib/dblink/dblink.h
contrib/dblink/dblink.sql.in
contrib/dbsize/Makefile
contrib/dbsize/README.dbsize
contrib/dbsize/dbsize.c
contrib/dbsize/dbsize.sql.in
contrib/earthdistance/Makefile
contrib/earthdistance/README.earthdistance
contrib/earthdistance/earthdistance.c
contrib/earthdistance/earthdistance.sql.in
contrib/findoidjoins/Makefile
contrib/findoidjoins/README.findoidjoins
contrib/findoidjoins/findoidjoins.c
contrib/findoidjoins/make_oidjoins_check
contrib/fulltextindex/Makefile
contrib/fulltextindex/README.fti
contrib/fulltextindex/TODO
contrib/fulltextindex/fti.c
contrib/fulltextindex/fti.pl
contrib/fulltextindex/fti.sql.in
contrib/fulltextindex/timings.sh
contrib/fuzzystrmatch/Makefile
contrib/fuzzystrmatch/README.fuzzystrmatch
contrib/fuzzystrmatch/README.soundex
contrib/fuzzystrmatch/fuzzystrmatch.c
contrib/fuzzystrmatch/fuzzystrmatch.h
contrib/fuzzystrmatch/fuzzystrmatch.sql.in
contrib/intagg/Makefile
contrib/intagg/README.int_aggregate
contrib/intagg/int_aggregate.c
contrib/intagg/int_aggregate.sql.in
contrib/intarray/Makefile
contrib/intarray/README.intarray
contrib/intarray/_int.c
contrib/intarray/_int.sql.in
contrib/intarray/bench/bench.pl
contrib/intarray/bench/create_test.pl
contrib/intarray/data/test__int.data
contrib/intarray/expected/_int.out
contrib/intarray/sql/_int.sql
contrib/ipc_check/README
contrib/ipc_check/ipc_check.pl
contrib/isbn_issn/Makefile
contrib/isbn_issn/README.isbn_issn
contrib/isbn_issn/isbn_issn.c
contrib/isbn_issn/isbn_issn.sql.in
contrib/lo/Makefile
contrib/lo/README.lo
contrib/lo/lo.c
contrib/lo/lo.sql.in
contrib/lo/lo_drop.sql
contrib/lo/lo_test.sql
contrib/mSQL-interface/Makefile
contrib/mSQL-interface/README.mpgsql
contrib/mSQL-interface/mpgsql.c
contrib/mac/README.mac
contrib/mac/createoui
contrib/mac/dropoui
contrib/mac/ouiparse.awk
contrib/mac/updateoui
contrib/miscutil/Makefile
contrib/miscutil/README.misc_utils
contrib/miscutil/misc_utils.c
contrib/miscutil/misc_utils.h
contrib/miscutil/misc_utils.sql.in
contrib/mysql/README
contrib/mysql/my2pg.pl
contrib/mysql/mysql2pgsql
contrib/noupdate/Makefile
contrib/noupdate/README.noup
contrib/noupdate/noup.c
contrib/noupdate/noup.sql.in
contrib/oid2name/Makefile
contrib/oid2name/README.oid2name
contrib/oid2name/oid2name.c
contrib/oracle/CHANGES
contrib/oracle/Ora2Pg.pm
contrib/oracle/README.ora2pg
contrib/oracle/TODO
contrib/oracle/ora2pg.html
contrib/oracle/ora2pg.pl
contrib/pg_controldata/Makefile
contrib/pg_controldata/README.pg_controldata
contrib/pg_controldata/pg_controldata.c
contrib/pg_dumplo/Makefile
contrib/pg_dumplo/README.pg_dumplo
contrib/pg_dumplo/lo_export.c
contrib/pg_dumplo/lo_import.c
contrib/pg_dumplo/main.c
contrib/pg_dumplo/pg_dumplo.h
contrib/pg_dumplo/utils.c
contrib/pg_logger/Makefile
contrib/pg_logger/README.pg_logger
contrib/pg_logger/pg_logger.c
contrib/pg_resetxlog/Makefile
contrib/pg_resetxlog/README.pg_resetxlog
contrib/pg_resetxlog/pg_resetxlog.c
contrib/pg_upgrade/README
contrib/pg_upgrade/pg_upgrade
contrib/pg_upgrade/pg_upgrade.1
contrib/pgbench/Makefile
contrib/pgbench/README.pgbench
contrib/pgbench/README.pgbench_jis
contrib/pgbench/pgbench.c
contrib/pgcrypto/API
contrib/pgcrypto/Makefile
contrib/pgcrypto/README.pgcrypto
contrib/pgcrypto/blf.c
contrib/pgcrypto/blf.h
contrib/pgcrypto/crypt-blowfish.c
contrib/pgcrypto/crypt-des.c
contrib/pgcrypto/crypt-gensalt.c
contrib/pgcrypto/crypt-md5.c
contrib/pgcrypto/expected/blowfish.out
contrib/pgcrypto/expected/crypt-blowfish.out
contrib/pgcrypto/expected/crypt-des.out
contrib/pgcrypto/expected/crypt-md5.out
contrib/pgcrypto/expected/crypt-xdes.out
contrib/pgcrypto/expected/hmac-md5.out
contrib/pgcrypto/expected/hmac-sha1.out
contrib/pgcrypto/expected/init.out
contrib/pgcrypto/expected/md5.out
contrib/pgcrypto/expected/rijndael.out
contrib/pgcrypto/expected/sha1.out
contrib/pgcrypto/internal.c
contrib/pgcrypto/md5.c
contrib/pgcrypto/md5.h
contrib/pgcrypto/mhash.c
contrib/pgcrypto/misc.c
contrib/pgcrypto/openssl.c
contrib/pgcrypto/pgcrypto.c
contrib/pgcrypto/pgcrypto.h
contrib/pgcrypto/pgcrypto.sql.in
contrib/pgcrypto/px-crypt.c
contrib/pgcrypto/px-crypt.h
contrib/pgcrypto/px-hmac.c
contrib/pgcrypto/px.c
contrib/pgcrypto/px.h
contrib/pgcrypto/random.c
contrib/pgcrypto/rijndael.c
contrib/pgcrypto/rijndael.h
contrib/pgcrypto/rijndael.tbl
contrib/pgcrypto/sha1.c
contrib/pgcrypto/sha1.h
contrib/pgcrypto/sql/blowfish.sql
contrib/pgcrypto/sql/crypt-blowfish.sql
contrib/pgcrypto/sql/crypt-des.sql
contrib/pgcrypto/sql/crypt-md5.sql
contrib/pgcrypto/sql/crypt-xdes.sql
contrib/pgcrypto/sql/hmac-md5.sql
contrib/pgcrypto/sql/hmac-sha1.sql
contrib/pgcrypto/sql/init.sql
contrib/pgcrypto/sql/md5.sql
contrib/pgcrypto/sql/rijndael.sql
contrib/pgcrypto/sql/sha1.sql
contrib/pgstattuple/Makefile
contrib/pgstattuple/README.pgstattuple
contrib/pgstattuple/README.pgstattuple.euc_jp
contrib/pgstattuple/pgstattuple.c
contrib/pgstattuple/pgstattuple.sql.in
contrib/retep/CHANGELOG
contrib/retep/Implementation
contrib/retep/Makefile
contrib/retep/README
contrib/retep/build.xml
contrib/retep/data/cds.dtd
contrib/retep/data/cds.xml
contrib/retep/retep.jpx
contrib/retep/uk/org/retep/dtu/DCollection.java
contrib/retep/uk/org/retep/dtu/DConstants.java
contrib/retep/uk/org/retep/dtu/DElement.java
contrib/retep/uk/org/retep/dtu/DEnvironment.java
contrib/retep/uk/org/retep/dtu/DModule.java
contrib/retep/uk/org/retep/dtu/DModuleXML.java
contrib/retep/uk/org/retep/dtu/DNode.java
contrib/retep/uk/org/retep/dtu/DProcessor.java
contrib/retep/uk/org/retep/dtu/DTransform.java
contrib/retep/uk/org/retep/tools/Tool.java
contrib/retep/uk/org/retep/tools.properties
contrib/retep/uk/org/retep/util/ExceptionDialog.java
contrib/retep/uk/org/retep/util/Globals.java
contrib/retep/uk/org/retep/util/Logger.java
contrib/retep/uk/org/retep/util/Main.java
contrib/retep/uk/org/retep/util/StandaloneApp.java
contrib/retep/uk/org/retep/util/hba/Editor.java
contrib/retep/uk/org/retep/util/hba/Main.java
contrib/retep/uk/org/retep/util/hba/Record.java
contrib/retep/uk/org/retep/util/misc/IPAddress.java
contrib/retep/uk/org/retep/util/misc/PropertiesIO.java
contrib/retep/uk/org/retep/util/misc/WStringTokenizer.java
contrib/retep/uk/org/retep/util/models/HBATableModel.java
contrib/retep/uk/org/retep/util/models/PropertiesTableModel.java
contrib/retep/uk/org/retep/util/proped/Main.java
contrib/retep/uk/org/retep/util/proped/PropertyEditor.java
contrib/retep/uk/org/retep/xml/core/XMLFactory.java
contrib/retep/uk/org/retep/xml/core/XMLFactoryException.java
contrib/retep/uk/org/retep/xml/jdbc/XMLDatabase.java
contrib/retep/uk/org/retep/xml/jdbc/XMLResultSet.java
contrib/retep/uk/org/retep/xml/parser/TagHandler.java
contrib/retep/uk/org/retep/xml/parser/TagListener.java
contrib/retep/uk/org/retep/xml/test/XMLExport.java
contrib/rserv/ApplySnapshot.in
contrib/rserv/CleanLog.in
contrib/rserv/GetSyncID.in
contrib/rserv/InitRservTest.in
contrib/rserv/Makefile
contrib/rserv/MasterAddTable.in
contrib/rserv/MasterInit.in
contrib/rserv/MasterSync.in
contrib/rserv/PrepareSnapshot.in
contrib/rserv/README.rserv
contrib/rserv/RServ.pm
contrib/rserv/Replicate.in
contrib/rserv/RservTest.in
contrib/rserv/SlaveAddTable.in
contrib/rserv/SlaveInit.in
contrib/rserv/master.sql.in
contrib/rserv/regress.sh
contrib/rserv/rserv.c
contrib/rserv/slave.sql.in
contrib/rtree_gist/Makefile
contrib/rtree_gist/README.rtree_gist
contrib/rtree_gist/bench/bench.pl
contrib/rtree_gist/bench/create_test.pl
contrib/rtree_gist/data/test_box.data
contrib/rtree_gist/expected/rtree_gist.out
contrib/rtree_gist/rtree_gist.c
contrib/rtree_gist/rtree_gist.sql.in
contrib/rtree_gist/sql/rtree_gist.sql
contrib/seg/Makefile
contrib/seg/README.seg
contrib/seg/buffer.c
contrib/seg/buffer.h
contrib/seg/data/test_seg.data
contrib/seg/expected/seg.out
contrib/seg/seg-validate.pl
contrib/seg/seg.c
contrib/seg/seg.sql.in
contrib/seg/segdata.h
contrib/seg/segparse.y
contrib/seg/segscan.l
contrib/seg/sort-segments.pl
contrib/seg/sql/seg.sql
contrib/spi/Makefile
contrib/spi/README.spi
contrib/spi/autoinc.c
contrib/spi/autoinc.example
contrib/spi/autoinc.sql.in
contrib/spi/insert_username.c
contrib/spi/insert_username.example
contrib/spi/insert_username.sql.in
contrib/spi/moddatetime.c
contrib/spi/moddatetime.example
contrib/spi/moddatetime.sql.in
contrib/spi/preprocessor/README.MAX
contrib/spi/preprocessor/example.sql
contrib/spi/preprocessor/step1.c
contrib/spi/preprocessor/step1.e
contrib/spi/preprocessor/step2.pl
contrib/spi/refint.c
contrib/spi/refint.example
contrib/spi/refint.sql.in
contrib/spi/timetravel.c
contrib/spi/timetravel.example
contrib/spi/timetravel.sql.in
contrib/start-scripts/freebsd
contrib/start-scripts/linux
contrib/string/Makefile
contrib/string/README.string_io
contrib/string/string_io.c
contrib/string/string_io.h
contrib/string/string_io.sql.in
contrib/tips/Makefile
contrib/tips/README.apachelog
contrib/tools/add-emacs-variables
contrib/tools/find-sources
contrib/tools/make-tags
contrib/tsearch/Makefile
contrib/tsearch/README.tsearch
contrib/tsearch/crc32.c
contrib/tsearch/crc32.h
contrib/tsearch/data/test_tsearch.data
contrib/tsearch/deflex.h
contrib/tsearch/dict/porter_english.dct
contrib/tsearch/dict/russian_stemming.dct
contrib/tsearch/dict.h
contrib/tsearch/expected/tsearch.out
contrib/tsearch/gistidx.c
contrib/tsearch/gistidx.h
contrib/tsearch/makedict/makedict.pl
contrib/tsearch/morph.c
contrib/tsearch/morph.h
contrib/tsearch/parser.h
contrib/tsearch/parser.l
contrib/tsearch/query.c
contrib/tsearch/query.h
contrib/tsearch/rewrite.c
contrib/tsearch/rewrite.h
contrib/tsearch/sql/tsearch.sql
contrib/tsearch/tsearch.sql.in
contrib/tsearch/txtidx.c
contrib/tsearch/txtidx.h
contrib/userlock/Makefile
contrib/userlock/README.user_locks
contrib/userlock/user_locks.c
contrib/userlock/user_locks.h
contrib/userlock/user_locks.sql.in
contrib/vacuumlo/Makefile
contrib/vacuumlo/README.vacuumlo
contrib/vacuumlo/vacuumlo.c
contrib/xml/Makefile
contrib/xml/README
contrib/xml/TODO
contrib/xml/pgxml.c
contrib/xml/pgxml.h
contrib/xml/pgxml.source
contrib/xml/pgxml_dom.c
contrib/xml/pgxml_dom.source
doc/FAQ
doc/FAQ_AIX
doc/FAQ_DEV
doc/FAQ_HPUX
doc/FAQ_IRIX
doc/FAQ_MSWIN
doc/FAQ_QNX4
doc/FAQ_SCO
doc/FAQ_Solaris
doc/FAQ_german
doc/FAQ_japanese
doc/FAQ_polish
doc/FAQ_russian
doc/KNOWN_BUGS
doc/MISSING_FEATURES
doc/Makefile
doc/README.mb.big5
doc/README.mb.jp
doc/TODO
doc/TODO.detail/README
doc/TODO.detail/atttypmod
doc/TODO.detail/crossdb
doc/TODO.detail/cursor
doc/TODO.detail/drop
doc/TODO.detail/exists
doc/TODO.detail/foreign
doc/TODO.detail/fsync
doc/TODO.detail/inheritance
doc/TODO.detail/java
doc/TODO.detail/mmap
doc/TODO.detail/namedatalen
doc/TODO.detail/optimizer
doc/TODO.detail/performance
doc/TODO.detail/persistent
doc/TODO.detail/pool
doc/TODO.detail/prepare
doc/TODO.detail/privileges
doc/TODO.detail/replication
doc/TODO.detail/schema
doc/TODO.detail/tablespaces
doc/TODO.detail/thread
doc/TODO.detail/transactions
doc/TODO.detail/typeconv
doc/TODO.detail/update
doc/TODO.detail/vacuum
doc/TODO.detail/view
doc/TODO.detail/win32
doc/TODO.detail/yacc
doc/bug.template
doc/src/FAQ/FAQ.html
doc/src/FAQ/FAQ_DEV.html
doc/src/FAQ/FAQ_german.html
doc/src/FAQ/FAQ_japanese.html
doc/src/FAQ/FAQ_polish.html
doc/src/FAQ/FAQ_russian.html
doc/src/Makefile
doc/src/graphics/catalogs.ag
doc/src/graphics/catalogs.cgm
doc/src/graphics/catalogs.gif
doc/src/graphics/catalogs.ps
doc/src/graphics/clientserver.ag
doc/src/graphics/clientserver.gif
doc/src/graphics/connections.ag
doc/src/graphics/connections.gif
doc/src/sgml/Makefile
doc/src/sgml/admin.sgml
doc/src/sgml/advanced.sgml
doc/src/sgml/arch-dev.sgml
doc/src/sgml/arch-pg.sgml
doc/src/sgml/array.sgml
doc/src/sgml/backup.sgml
doc/src/sgml/biblio.sgml
doc/src/sgml/bki.sgml
doc/src/sgml/book-decl.sgml
doc/src/sgml/catalogs.sgml
doc/src/sgml/charset.sgml
doc/src/sgml/client-auth.sgml
doc/src/sgml/compiler.sgml
doc/src/sgml/contacts.sgml
doc/src/sgml/cvs.sgml
doc/src/sgml/datatype.sgml
doc/src/sgml/datetime.sgml
doc/src/sgml/developer.sgml
doc/src/sgml/dfunc.sgml
doc/src/sgml/diskusage.sgml
doc/src/sgml/docguide.sgml
doc/src/sgml/ecpg.sgml
doc/src/sgml/extend.sgml
doc/src/sgml/features.sgml
doc/src/sgml/filelist.sgml
doc/src/sgml/fixrtf
doc/src/sgml/func-ref.sgml
doc/src/sgml/func.sgml
doc/src/sgml/geqo.sgml
doc/src/sgml/gist.sgml
doc/src/sgml/history.sgml
doc/src/sgml/indexcost.sgml
doc/src/sgml/indices.sgml
doc/src/sgml/info.sgml
doc/src/sgml/inherit.sgml
doc/src/sgml/install-win32.sgml
doc/src/sgml/installation.sgml
doc/src/sgml/intro.sgml
doc/src/sgml/jdbc.sgml
doc/src/sgml/keywords.sgml
doc/src/sgml/legal.sgml
doc/src/sgml/libpgeasy.sgml
doc/src/sgml/libpgtcl.sgml
doc/src/sgml/libpq++.sgml
doc/src/sgml/libpq.sgml
doc/src/sgml/lobj.sgml
doc/src/sgml/maintenance.sgml
doc/src/sgml/manage-ag.sgml
doc/src/sgml/manage.sgml
doc/src/sgml/monitoring.sgml
doc/src/sgml/mvcc.sgml
doc/src/sgml/nls.sgml
doc/src/sgml/notation.sgml
doc/src/sgml/odbc.sgml
doc/src/sgml/page.sgml
doc/src/sgml/perform.sgml
doc/src/sgml/plperl.sgml
doc/src/sgml/plpython.sgml
doc/src/sgml/plsql.sgml
doc/src/sgml/pltcl.sgml
doc/src/sgml/postgres.sgml
doc/src/sgml/problems.sgml
doc/src/sgml/programmer.sgml
doc/src/sgml/protocol.sgml
doc/src/sgml/pygresql.sgml
doc/src/sgml/queries.sgml
doc/src/sgml/query.sgml
doc/src/sgml/recovery.sgml
doc/src/sgml/ref/abort.sgml
doc/src/sgml/ref/allfiles.sgml
doc/src/sgml/ref/alter_database.sgml
doc/src/sgml/ref/alter_group.sgml
doc/src/sgml/ref/alter_table.sgml
doc/src/sgml/ref/alter_trigger.sgml
doc/src/sgml/ref/alter_user.sgml
doc/src/sgml/ref/analyze.sgml
doc/src/sgml/ref/begin.sgml
doc/src/sgml/ref/checkpoint.sgml
doc/src/sgml/ref/close.sgml
doc/src/sgml/ref/cluster.sgml
doc/src/sgml/ref/comment.sgml
doc/src/sgml/ref/commit.sgml
doc/src/sgml/ref/copy.sgml
doc/src/sgml/ref/create_aggregate.sgml
doc/src/sgml/ref/create_constraint.sgml
doc/src/sgml/ref/create_database.sgml
doc/src/sgml/ref/create_domain.sgml
doc/src/sgml/ref/create_function.sgml
doc/src/sgml/ref/create_group.sgml
doc/src/sgml/ref/create_index.sgml
doc/src/sgml/ref/create_language.sgml
doc/src/sgml/ref/create_operator.sgml
doc/src/sgml/ref/create_rule.sgml
doc/src/sgml/ref/create_schema.sgml
doc/src/sgml/ref/create_sequence.sgml
doc/src/sgml/ref/create_table.sgml
doc/src/sgml/ref/create_table_as.sgml
doc/src/sgml/ref/create_trigger.sgml
doc/src/sgml/ref/create_type.sgml
doc/src/sgml/ref/create_user.sgml
doc/src/sgml/ref/create_view.sgml
doc/src/sgml/ref/createdb.sgml
doc/src/sgml/ref/createlang.sgml
doc/src/sgml/ref/createuser.sgml
doc/src/sgml/ref/current_date.sgml
doc/src/sgml/ref/current_time.sgml
doc/src/sgml/ref/current_timestamp.sgml
doc/src/sgml/ref/current_user.sgml
doc/src/sgml/ref/declare.sgml
doc/src/sgml/ref/delete.sgml
doc/src/sgml/ref/drop_aggregate.sgml
doc/src/sgml/ref/drop_database.sgml
doc/src/sgml/ref/drop_domain.sgml
doc/src/sgml/ref/drop_function.sgml
doc/src/sgml/ref/drop_group.sgml
doc/src/sgml/ref/drop_index.sgml
doc/src/sgml/ref/drop_language.sgml
doc/src/sgml/ref/drop_operator.sgml
doc/src/sgml/ref/drop_rule.sgml
doc/src/sgml/ref/drop_sequence.sgml
doc/src/sgml/ref/drop_table.sgml
doc/src/sgml/ref/drop_trigger.sgml
doc/src/sgml/ref/drop_type.sgml
doc/src/sgml/ref/drop_user.sgml
doc/src/sgml/ref/drop_view.sgml
doc/src/sgml/ref/dropdb.sgml
doc/src/sgml/ref/droplang.sgml
doc/src/sgml/ref/dropuser.sgml
doc/src/sgml/ref/ecpg-ref.sgml
doc/src/sgml/ref/end.sgml
doc/src/sgml/ref/explain.sgml
doc/src/sgml/ref/fetch.sgml
doc/src/sgml/ref/grant.sgml
doc/src/sgml/ref/initdb.sgml
doc/src/sgml/ref/initlocation.sgml
doc/src/sgml/ref/insert.sgml
doc/src/sgml/ref/ipcclean.sgml
doc/src/sgml/ref/listen.sgml
doc/src/sgml/ref/load.sgml
doc/src/sgml/ref/lock.sgml
doc/src/sgml/ref/move.sgml
doc/src/sgml/ref/notify.sgml
doc/src/sgml/ref/pg_config-ref.sgml
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Diffstat (limited to 'src/backend/utils/cache/relcache.c')
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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); - } -} |