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author | CVS to git conversion script <webmaster@postgresql.org> | 2002-06-20 20:29:55 +0000 |
---|---|---|
committer | CVS to git conversion script <webmaster@postgresql.org> | 2002-06-20 20:29:55 +0000 |
commit | 05dedace84ef8c93fea5309c3ac55f889011429b (patch) | |
tree | 4c7f513afbbc03060039a165d1770e11be711773 /src/interfaces/libpq/fe-exec.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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src/test/regress/sql/polygon.sql
src/test/regress/sql/portals.sql
src/test/regress/sql/portals_p2.sql
src/test/regress/sql/privileges.sql
src/test/regress/sql/random.sql
src/test/regress/sql/reltime.sql
src/test/regress/sql/rules.sql
src/test/regress/sql/sanity_check.sql
src/test/regress/sql/select.sql
src/test/regress/sql/select_distinct.sql
src/test/regress/sql/select_distinct_on.sql
src/test/regress/sql/select_having.sql
src/test/regress/sql/select_implicit.sql
src/test/regress/sql/select_into.sql
src/test/regress/sql/select_views.sql
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src/test/regress/sql/type_sanity.sql
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Diffstat (limited to 'src/interfaces/libpq/fe-exec.c')
-rw-r--r-- | src/interfaces/libpq/fe-exec.c | 2451 |
1 files changed, 0 insertions, 2451 deletions
diff --git a/src/interfaces/libpq/fe-exec.c b/src/interfaces/libpq/fe-exec.c deleted file mode 100644 index 3ff32daaeb1..00000000000 --- a/src/interfaces/libpq/fe-exec.c +++ /dev/null @@ -1,2451 +0,0 @@ -/*------------------------------------------------------------------------- - * - * fe-exec.c - * functions related to sending a query down to the backend - * - * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group - * Portions Copyright (c) 1994, Regents of the University of California - * - * - * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.120 2002/06/20 20:29:53 momjian Exp $ - * - *------------------------------------------------------------------------- - */ -#include "postgres_fe.h" - -#include <errno.h> -#include <ctype.h> -#include <fcntl.h> - -#include "libpq-fe.h" -#include "libpq-int.h" - -#ifdef WIN32 -#include "win32.h" -#else -#include <unistd.h> -#endif - -/* keep this in same order as ExecStatusType in libpq-fe.h */ -char *const pgresStatus[] = { - "PGRES_EMPTY_QUERY", - "PGRES_COMMAND_OK", - "PGRES_TUPLES_OK", - "PGRES_COPY_OUT", - "PGRES_COPY_IN", - "PGRES_BAD_RESPONSE", - "PGRES_NONFATAL_ERROR", - "PGRES_FATAL_ERROR" -}; - - -/* Note: DONOTICE macro will work if applied to either PGconn or PGresult */ -#define DONOTICE(conn,message) \ - ((*(conn)->noticeHook) ((conn)->noticeArg, (message))) - - -static void pqCatenateResultError(PGresult *res, const char *msg); -static void saveErrorResult(PGconn *conn); -static PGresult *prepareAsyncResult(PGconn *conn); -static int addTuple(PGresult *res, PGresAttValue * tup); -static void parseInput(PGconn *conn); -static void handleSendFailure(PGconn *conn); -static int getRowDescriptions(PGconn *conn); -static int getAnotherTuple(PGconn *conn, int binary); -static int getNotify(PGconn *conn); -static int getNotice(PGconn *conn); - -/* --------------- - * Escaping arbitrary strings to get valid SQL strings/identifiers. - * - * Replaces "\\" with "\\\\" and "'" with "''". - * length is the length of the buffer pointed to by - * from. The buffer at to must be at least 2*length + 1 characters - * long. A terminating NUL character is written. - * --------------- - */ - -size_t -PQescapeString(char *to, const char *from, size_t length) -{ - const char *source = from; - char *target = to; - unsigned int remaining = length; - - while (remaining > 0) - { - switch (*source) - { - case '\\': - *target = '\\'; - target++; - *target = '\\'; - /* target and remaining are updated below. */ - break; - - case '\'': - *target = '\''; - target++; - *target = '\''; - /* target and remaining are updated below. */ - break; - - default: - *target = *source; - /* target and remaining are updated below. */ - } - source++; - target++; - remaining--; - } - - /* Write the terminating NUL character. */ - *target = '\0'; - - return target - to; -} - -/* - * PQescapeBytea - converts from binary string to the - * minimal encoding necessary to include the string in an SQL - * INSERT statement with a bytea type column as the target. - * - * The following transformations are applied - * '\0' == ASCII 0 == \\000 - * '\'' == ASCII 39 == \' - * '\\' == ASCII 92 == \\\\ - * anything >= 0x80 ---> \\ooo (where ooo is an octal expression) - */ -unsigned char * -PQescapeBytea(unsigned char *bintext, size_t binlen, size_t *bytealen) -{ - unsigned char *vp; - unsigned char *rp; - unsigned char *result; - size_t i; - size_t len; - - /* - * empty string has 1 char ('\0') - */ - len = 1; - - vp = bintext; - for (i = binlen; i > 0; i--, vp++) - { - if (*vp == 0 || *vp >= 0x80) - len += 5; /* '5' is for '\\ooo' */ - else if (*vp == '\'') - len += 2; - else if (*vp == '\\') - len += 4; - else - len++; - } - - rp = result = (unsigned char *) malloc(len); - if (rp == NULL) - return NULL; - - vp = bintext; - *bytealen = len; - - for (i = binlen; i > 0; i--, vp++) - { - if (*vp == 0 || *vp >= 0x80) - { - (void)sprintf(rp,"\\\\%03o",*vp); - rp += 5; - } - else if (*vp == '\'') - { - rp[0] = '\\'; - rp[1] = '\''; - rp += 2; - } - else if (*vp == '\\') - { - rp[0] = '\\'; - rp[1] = '\\'; - rp[2] = '\\'; - rp[3] = '\\'; - rp += 4; - } - else - *rp++ = *vp; - } - *rp = '\0'; - - return result; -} - -/* - * PQunescapeBytea - converts the null terminated string representation - * of a bytea, strtext, into binary, filling a buffer. It returns a - * pointer to the buffer which is NULL on error, and the size of the - * buffer in retbuflen. The pointer may subsequently be used as an - * argument to the function free(3). It is the reverse of PQescapeBytea. - * - * The following transformations are reversed: - * '\0' == ASCII 0 == \000 - * '\'' == ASCII 39 == \' - * '\\' == ASCII 92 == \\ - * - * States: - * 0 normal 0->1->2->3->4 - * 1 \ 1->5 - * 2 \0 1->6 - * 3 \00 - * 4 \000 - * 5 \' - * 6 \\ - */ -unsigned char * -PQunescapeBytea(unsigned char *strtext, size_t *retbuflen) -{ - size_t buflen; - unsigned char *buffer, *sp, *bp; - unsigned int state=0; - - if(strtext == NULL)return NULL; - buflen = strlen(strtext); /* will shrink, also we discover if strtext */ - buffer = (unsigned char *) malloc(buflen); /* isn't NULL terminated */ - if(buffer == NULL)return NULL; - for(bp = buffer, sp = strtext; *sp != '\0'; bp++, sp++) - { - switch(state) - { - case 0: - if(*sp == '\\')state=1; - *bp = *sp; - break; - case 1: - if(*sp == '\'') /* state=5 */ - { /* replace \' with 39 */ - bp--; - *bp = '\''; - buflen--; - state=0; - } - else if(*sp == '\\') /* state=6 */ - { /* replace \\ with 92 */ - bp--; - *bp = '\\'; - buflen--; - state=0; - } - else - { - if(isdigit(*sp))state=2; - else state=0; - *bp = *sp; - } - break; - case 2: - if(isdigit(*sp))state=3; - else state=0; - *bp = *sp; - break; - case 3: - if(isdigit(*sp)) /* state=4 */ - { - int v; - bp -= 3; - sscanf(sp-2, "%03o", &v); - *bp = v; - buflen -= 3; - state=0; - } - else - { - *bp = *sp; - state=0; - } - break; - } - } - buffer = realloc(buffer,buflen); - if (buffer == NULL) - return NULL; - - *retbuflen=buflen; - return buffer; -} - -/* ---------------- - * Space management for PGresult. - * - * Formerly, libpq did a separate malloc() for each field of each tuple - * returned by a query. This was remarkably expensive --- malloc/free - * consumed a sizable part of the application's runtime. And there is - * no real need to keep track of the fields separately, since they will - * all be freed together when the PGresult is released. So now, we grab - * large blocks of storage from malloc and allocate space for query data - * within these blocks, using a trivially simple allocator. This reduces - * the number of malloc/free calls dramatically, and it also avoids - * fragmentation of the malloc storage arena. - * The PGresult structure itself is still malloc'd separately. We could - * combine it with the first allocation block, but that would waste space - * for the common case that no extra storage is actually needed (that is, - * the SQL command did not return tuples). - * - * We also malloc the top-level array of tuple pointers separately, because - * we need to be able to enlarge it via realloc, and our trivial space - * allocator doesn't handle that effectively. (Too bad the FE/BE protocol - * doesn't tell us up front how many tuples will be returned.) - * All other subsidiary storage for a PGresult is kept in PGresult_data blocks - * of size PGRESULT_DATA_BLOCKSIZE. The overhead at the start of each block - * is just a link to the next one, if any. Free-space management info is - * kept in the owning PGresult. - * A query returning a small amount of data will thus require three malloc - * calls: one for the PGresult, one for the tuples pointer array, and one - * PGresult_data block. - * - * Only the most recently allocated PGresult_data block is a candidate to - * have more stuff added to it --- any extra space left over in older blocks - * is wasted. We could be smarter and search the whole chain, but the point - * here is to be simple and fast. Typical applications do not keep a PGresult - * around very long anyway, so some wasted space within one is not a problem. - * - * Tuning constants for the space allocator are: - * PGRESULT_DATA_BLOCKSIZE: size of a standard allocation block, in bytes - * PGRESULT_ALIGN_BOUNDARY: assumed alignment requirement for binary data - * PGRESULT_SEP_ALLOC_THRESHOLD: objects bigger than this are given separate - * blocks, instead of being crammed into a regular allocation block. - * Requirements for correct function are: - * PGRESULT_ALIGN_BOUNDARY must be a multiple of the alignment requirements - * of all machine data types. (Currently this is set from configure - * tests, so it should be OK automatically.) - * PGRESULT_SEP_ALLOC_THRESHOLD + PGRESULT_BLOCK_OVERHEAD <= - * PGRESULT_DATA_BLOCKSIZE - * pqResultAlloc assumes an object smaller than the threshold will fit - * in a new block. - * The amount of space wasted at the end of a block could be as much as - * PGRESULT_SEP_ALLOC_THRESHOLD, so it doesn't pay to make that too large. - * ---------------- - */ - -#ifdef MAX -#undef MAX -#endif -#define MAX(a,b) ((a) > (b) ? (a) : (b)) - -#define PGRESULT_DATA_BLOCKSIZE 2048 -#define PGRESULT_ALIGN_BOUNDARY MAXIMUM_ALIGNOF /* from configure */ -#define PGRESULT_BLOCK_OVERHEAD MAX(sizeof(PGresult_data), PGRESULT_ALIGN_BOUNDARY) -#define PGRESULT_SEP_ALLOC_THRESHOLD (PGRESULT_DATA_BLOCKSIZE / 2) - - -/* - * PQmakeEmptyPGresult - * returns a newly allocated, initialized PGresult with given status. - * If conn is not NULL and status indicates an error, the conn's - * errorMessage is copied. - * - * Note this is exported --- you wouldn't think an application would need - * to build its own PGresults, but this has proven useful in both libpgtcl - * and the Perl5 interface, so maybe it's not so unreasonable. - */ - -PGresult * -PQmakeEmptyPGresult(PGconn *conn, ExecStatusType status) -{ - PGresult *result; - - result = (PGresult *) malloc(sizeof(PGresult)); - - result->xconn = conn; /* might be NULL */ - result->ntups = 0; - result->numAttributes = 0; - result->attDescs = NULL; - result->tuples = NULL; - result->tupArrSize = 0; - result->resultStatus = status; - result->cmdStatus[0] = '\0'; - result->binary = 0; - result->errMsg = NULL; - result->null_field[0] = '\0'; - result->curBlock = NULL; - result->curOffset = 0; - result->spaceLeft = 0; - - if (conn) - { - /* copy connection data we might need for operations on PGresult */ - result->noticeHook = conn->noticeHook; - result->noticeArg = conn->noticeArg; - result->client_encoding = conn->client_encoding; - - /* consider copying conn's errorMessage */ - switch (status) - { - case PGRES_EMPTY_QUERY: - case PGRES_COMMAND_OK: - case PGRES_TUPLES_OK: - case PGRES_COPY_OUT: - case PGRES_COPY_IN: - /* non-error cases */ - break; - default: - pqSetResultError(result, conn->errorMessage.data); - break; - } - } - else - { - /* defaults... */ - result->noticeHook = NULL; - result->noticeArg = NULL; - result->client_encoding = 0; /* should be SQL_ASCII */ - } - - return result; -} - -/* - * pqResultAlloc - - * Allocate subsidiary storage for a PGresult. - * - * nBytes is the amount of space needed for the object. - * If isBinary is true, we assume that we need to align the object on - * a machine allocation boundary. - * If isBinary is false, we assume the object is a char string and can - * be allocated on any byte boundary. - */ -void * -pqResultAlloc(PGresult *res, size_t nBytes, bool isBinary) -{ - char *space; - PGresult_data *block; - - if (!res) - return NULL; - - if (nBytes <= 0) - return res->null_field; - - /* - * If alignment is needed, round up the current position to an - * alignment boundary. - */ - if (isBinary) - { - int offset = res->curOffset % PGRESULT_ALIGN_BOUNDARY; - - if (offset) - { - res->curOffset += PGRESULT_ALIGN_BOUNDARY - offset; - res->spaceLeft -= PGRESULT_ALIGN_BOUNDARY - offset; - } - } - - /* If there's enough space in the current block, no problem. */ - if (nBytes <= (size_t) res->spaceLeft) - { - space = res->curBlock->space + res->curOffset; - res->curOffset += nBytes; - res->spaceLeft -= nBytes; - return space; - } - - /* - * If the requested object is very large, give it its own block; this - * avoids wasting what might be most of the current block to start a - * new block. (We'd have to special-case requests bigger than the - * block size anyway.) The object is always given binary alignment in - * this case. - */ - if (nBytes >= PGRESULT_SEP_ALLOC_THRESHOLD) - { - block = (PGresult_data *) malloc(nBytes + PGRESULT_BLOCK_OVERHEAD); - if (!block) - return NULL; - space = block->space + PGRESULT_BLOCK_OVERHEAD; - if (res->curBlock) - { - /* - * Tuck special block below the active block, so that we don't - * have to waste the free space in the active block. - */ - block->next = res->curBlock->next; - res->curBlock->next = block; - } - else - { - /* Must set up the new block as the first active block. */ - block->next = NULL; - res->curBlock = block; - res->spaceLeft = 0; /* be sure it's marked full */ - } - return space; - } - - /* Otherwise, start a new block. */ - block = (PGresult_data *) malloc(PGRESULT_DATA_BLOCKSIZE); - if (!block) - return NULL; - block->next = res->curBlock; - res->curBlock = block; - if (isBinary) - { - /* object needs full alignment */ - res->curOffset = PGRESULT_BLOCK_OVERHEAD; - res->spaceLeft = PGRESULT_DATA_BLOCKSIZE - PGRESULT_BLOCK_OVERHEAD; - } - else - { - /* we can cram it right after the overhead pointer */ - res->curOffset = sizeof(PGresult_data); - res->spaceLeft = PGRESULT_DATA_BLOCKSIZE - sizeof(PGresult_data); - } - - space = block->space + res->curOffset; - res->curOffset += nBytes; - res->spaceLeft -= nBytes; - return space; -} - -/* - * pqResultStrdup - - * Like strdup, but the space is subsidiary PGresult space. - */ -char * -pqResultStrdup(PGresult *res, const char *str) -{ - char *space = (char *) pqResultAlloc(res, strlen(str) + 1, FALSE); - - if (space) - strcpy(space, str); - return space; -} - -/* - * pqSetResultError - - * assign a new error message to a PGresult - */ -void -pqSetResultError(PGresult *res, const char *msg) -{ - if (!res) - return; - if (msg && *msg) - res->errMsg = pqResultStrdup(res, msg); - else - res->errMsg = NULL; -} - -/* - * pqCatenateResultError - - * concatenate a new error message to the one already in a PGresult - */ -static void -pqCatenateResultError(PGresult *res, const char *msg) -{ - PQExpBufferData errorBuf; - - if (!res || !msg) - return; - initPQExpBuffer(&errorBuf); - if (res->errMsg) - appendPQExpBufferStr(&errorBuf, res->errMsg); - appendPQExpBufferStr(&errorBuf, msg); - pqSetResultError(res, errorBuf.data); - termPQExpBuffer(&errorBuf); -} - -/* - * PQclear - - * free's the memory associated with a PGresult - */ -void -PQclear(PGresult *res) -{ - PGresult_data *block; - - if (!res) - return; - - /* Free all the subsidiary blocks */ - while ((block = res->curBlock) != NULL) - { - res->curBlock = block->next; - free(block); - } - - /* Free the top-level tuple pointer array */ - if (res->tuples) - free(res->tuples); - - /* Free the PGresult structure itself */ - free(res); -} - -/* - * Handy subroutine to deallocate any partially constructed async result. - */ - -void -pqClearAsyncResult(PGconn *conn) -{ - if (conn->result) - PQclear(conn->result); - conn->result = NULL; - conn->curTuple = NULL; -} - -/* - * This subroutine deletes any existing async result, sets conn->result - * to a PGresult with status PGRES_FATAL_ERROR, and stores the current - * contents of conn->errorMessage into that result. It differs from a - * plain call on PQmakeEmptyPGresult() in that if there is already an - * async result with status PGRES_FATAL_ERROR, the current error message - * is APPENDED to the old error message instead of replacing it. This - * behavior lets us report multiple error conditions properly, if necessary. - * (An example where this is needed is when the backend sends an 'E' message - * and immediately closes the connection --- we want to report both the - * backend error and the connection closure error.) - */ -static void -saveErrorResult(PGconn *conn) -{ - /* - * If no old async result, just let PQmakeEmptyPGresult make one. - * Likewise if old result is not an error message. - */ - if (conn->result == NULL || - conn->result->resultStatus != PGRES_FATAL_ERROR || - conn->result->errMsg == NULL) - { - pqClearAsyncResult(conn); - conn->result = PQmakeEmptyPGresult(conn, PGRES_FATAL_ERROR); - } - else - { - /* Else, concatenate error message to existing async result. */ - pqCatenateResultError(conn->result, conn->errorMessage.data); - } -} - -/* - * This subroutine prepares an async result object for return to the caller. - * If there is not already an async result object, build an error object - * using whatever is in conn->errorMessage. In any case, clear the async - * result storage and make sure PQerrorMessage will agree with the result's - * error string. - */ -static PGresult * -prepareAsyncResult(PGconn *conn) -{ - PGresult *res; - - /* - * conn->result is the PGresult to return. If it is NULL (which - * probably shouldn't happen) we assume there is an appropriate error - * message in conn->errorMessage. - */ - res = conn->result; - conn->result = NULL; /* handing over ownership to caller */ - conn->curTuple = NULL; /* just in case */ - if (!res) - res = PQmakeEmptyPGresult(conn, PGRES_FATAL_ERROR); - else - { - /* - * Make sure PQerrorMessage agrees with result; it could be - * different if we have concatenated messages. - */ - resetPQExpBuffer(&conn->errorMessage); - appendPQExpBufferStr(&conn->errorMessage, - PQresultErrorMessage(res)); - } - return res; -} - -/* - * addTuple - * add a row pointer to the PGresult structure, growing it if necessary - * Returns TRUE if OK, FALSE if not enough memory to add the row - */ -static int -addTuple(PGresult *res, PGresAttValue * tup) -{ - if (res->ntups >= res->tupArrSize) - { - /* - * Try to grow the array. - * - * We can use realloc because shallow copying of the structure is - * okay. Note that the first time through, res->tuples is NULL. - * While ANSI says that realloc() should act like malloc() in that - * case, some old C libraries (like SunOS 4.1.x) coredump instead. - * On failure realloc is supposed to return NULL without damaging - * the existing allocation. Note that the positions beyond - * res->ntups are garbage, not necessarily NULL. - */ - int newSize = (res->tupArrSize > 0) ? res->tupArrSize * 2 : 128; - PGresAttValue **newTuples; - - if (res->tuples == NULL) - newTuples = (PGresAttValue **) - malloc(newSize * sizeof(PGresAttValue *)); - else - newTuples = (PGresAttValue **) - realloc(res->tuples, newSize * sizeof(PGresAttValue *)); - if (!newTuples) - return FALSE; /* malloc or realloc failed */ - res->tupArrSize = newSize; - res->tuples = newTuples; - } - res->tuples[res->ntups] = tup; - res->ntups++; - return TRUE; -} - - -/* - * PQsendQuery - * Submit a query, but don't wait for it to finish - * - * Returns: 1 if successfully submitted - * 0 if error (conn->errorMessage is set) - */ - -int -PQsendQuery(PGconn *conn, const char *query) -{ - if (!conn) - return 0; - - /* clear the error string */ - resetPQExpBuffer(&conn->errorMessage); - - if (!query) - { - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("command string is a null pointer\n")); - return 0; - } - - /* Don't try to send if we know there's no live connection. */ - if (conn->status != CONNECTION_OK) - { - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("no connection to the server\n")); - return 0; - } - /* Can't send while already busy, either. */ - if (conn->asyncStatus != PGASYNC_IDLE) - { - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("another command is already in progress\n")); - return 0; - } - - /* initialize async result-accumulation state */ - conn->result = NULL; - conn->curTuple = NULL; - - /* send the query to the backend; */ - - /* - * in order to guarantee that we don't send a partial query where we - * would become out of sync with the backend and/or block during a - * non-blocking connection we must first flush the send buffer before - * sending more data - * - * an alternative is to implement 'queue reservations' where we are able - * to roll up a transaction (the 'Q' along with our query) and make - * sure we have enough space for it all in the send buffer. - */ - if (pqIsnonblocking(conn)) - { - /* - * the buffer must have emptied completely before we allow a new - * query to be buffered - */ - if (pqFlush(conn)) - return 0; - /* 'Q' == queries */ - /* XXX: if we fail here we really ought to not block */ - if (pqPutc('Q', conn) != 0 || pqPuts(query, conn) != 0) - { - handleSendFailure(conn); - return 0; - } - - /* - * give the data a push, ignore the return value as ConsumeInput() - * will do any aditional flushing if needed - */ - pqFlush(conn); - } - else - { - /* - * the frontend-backend protocol uses 'Q' to designate queries - */ - if (pqPutc('Q', conn) != 0 || pqPuts(query, conn) != 0 || - pqFlush(conn) != 0) - { - handleSendFailure(conn); - return 0; - } - } - - /* OK, it's launched! */ - conn->asyncStatus = PGASYNC_BUSY; - return 1; -} - -/* - * handleSendFailure: try to clean up after failure to send command. - * - * Primarily, what we want to accomplish here is to process an async - * WARNING message that the backend might have sent just before it died. - * - * NOTE: this routine should only be called in PGASYNC_IDLE state. - */ - -static void -handleSendFailure(PGconn *conn) -{ - /* - * Accept any available input data, ignoring errors. Note that if - * pqReadData decides the backend has closed the channel, it will - * close our side of the socket --- that's just what we want here. - */ - while (pqReadData(conn) > 0) - /* loop until no more data readable */ ; - - /* - * Parse any available input messages. Since we are in PGASYNC_IDLE - * state, only WARNING and NOTIFY messages will be eaten. - */ - parseInput(conn); -} - -/* - * Consume any available input from the backend - * 0 return: some kind of trouble - * 1 return: no problem - */ - -int -PQconsumeInput(PGconn *conn) -{ - if (!conn) - return 0; - - /* - * Load more data, if available. We do this no matter what state we - * are in, since we are probably getting called because the - * application wants to get rid of a read-select condition. Note that - * we will NOT block waiting for more input. - */ - if (pqReadData(conn) < 0) - { - /* - * for non-blocking connections try to flush the send-queue - * otherwise we may never get a responce for something that may - * not have already been sent because it's in our write buffer! - */ - if (pqIsnonblocking(conn)) - (void) pqFlush(conn); - return 0; - } - /* Parsing of the data waits till later. */ - return 1; -} - - -/* - * parseInput: if appropriate, parse input data from backend - * until input is exhausted or a stopping state is reached. - * Note that this function will NOT attempt to read more data from the backend. - */ - -static void -parseInput(PGconn *conn) -{ - char id; - char noticeWorkspace[128]; - - /* - * Loop to parse successive complete messages available in the buffer. - */ - for (;;) - { - /* - * Quit if in COPY_OUT state: we expect raw data from the server - * until PQendcopy is called. Don't try to parse it according to - * the normal protocol. (This is bogus. The data lines ought to - * be part of the protocol and have identifying leading - * characters.) - */ - if (conn->asyncStatus == PGASYNC_COPY_OUT) - return; - - /* - * OK to try to read a message type code. - */ - conn->inCursor = conn->inStart; - if (pqGetc(&id, conn)) - return; - - /* - * NOTIFY and WARNING messages can happen in any state besides COPY - * OUT; always process them right away. - * - * Most other messages should only be processed while in BUSY state. - * (In particular, in READY state we hold off further parsing - * until the application collects the current PGresult.) - * - * However, if the state is IDLE then we got trouble; we need to deal - * with the unexpected message somehow. - */ - if (id == 'A') - { - if (getNotify(conn)) - return; - } - else if (id == 'N') - { - if (getNotice(conn)) - return; - } - else if (conn->asyncStatus != PGASYNC_BUSY) - { - /* If not IDLE state, just wait ... */ - if (conn->asyncStatus != PGASYNC_IDLE) - return; - - /* - * Unexpected message in IDLE state; need to recover somehow. - * ERROR messages are displayed using the notice processor; - * anything else is just dropped on the floor after displaying - * a suitable warning notice. (An ERROR is very possibly the - * backend telling us why it is about to close the connection, - * so we don't want to just discard it...) - */ - if (id == 'E') - { - if (getNotice(conn)) - return; - } - else - { - snprintf(noticeWorkspace, sizeof(noticeWorkspace), - libpq_gettext("message type 0x%02x arrived from server while idle\n"), - id); - DONOTICE(conn, noticeWorkspace); - /* Discard the unexpected message; good idea?? */ - conn->inStart = conn->inEnd; - break; - } - } - else - { - /* - * In BUSY state, we can process everything. - */ - switch (id) - { - case 'C': /* command complete */ - if (pqGets(&conn->workBuffer, conn)) - return; - if (conn->result == NULL) - conn->result = PQmakeEmptyPGresult(conn, - PGRES_COMMAND_OK); - strncpy(conn->result->cmdStatus, conn->workBuffer.data, - CMDSTATUS_LEN); - conn->asyncStatus = PGASYNC_READY; - break; - case 'E': /* error return */ - if (pqGets(&conn->errorMessage, conn)) - return; - /* build an error result holding the error message */ - saveErrorResult(conn); - conn->asyncStatus = PGASYNC_READY; - break; - case 'Z': /* backend is ready for new query */ - conn->asyncStatus = PGASYNC_IDLE; - break; - case 'I': /* empty query */ - /* read and throw away the closing '\0' */ - if (pqGetc(&id, conn)) - return; - if (id != '\0') - { - snprintf(noticeWorkspace, sizeof(noticeWorkspace), - libpq_gettext("unexpected character %c following empty query response (\"I\" message)\n"), - id); - DONOTICE(conn, noticeWorkspace); - } - if (conn->result == NULL) - conn->result = PQmakeEmptyPGresult(conn, - PGRES_EMPTY_QUERY); - conn->asyncStatus = PGASYNC_READY; - break; - case 'K': /* secret key data from the backend */ - - /* - * This is expected only during backend startup, but - * it's just as easy to handle it as part of the main - * loop. Save the data and continue processing. - */ - if (pqGetInt(&(conn->be_pid), 4, conn)) - return; - if (pqGetInt(&(conn->be_key), 4, conn)) - return; - break; - case 'P': /* synchronous (normal) portal */ - if (pqGets(&conn->workBuffer, conn)) - return; - /* We pretty much ignore this message type... */ - break; - case 'T': /* row descriptions (start of query - * results) */ - if (conn->result == NULL) - { - /* First 'T' in a query sequence */ - if (getRowDescriptions(conn)) - return; - } - else - { - /* - * A new 'T' message is treated as the start of - * another PGresult. (It is not clear that this - * is really possible with the current backend.) - * We stop parsing until the application accepts - * the current result. - */ - conn->asyncStatus = PGASYNC_READY; - return; - } - break; - case 'D': /* ASCII data tuple */ - if (conn->result != NULL) - { - /* Read another tuple of a normal query response */ - if (getAnotherTuple(conn, FALSE)) - return; - } - else - { - snprintf(noticeWorkspace, sizeof(noticeWorkspace), - libpq_gettext("server sent data (\"D\" message) without prior row description (\"T\" message)\n")); - DONOTICE(conn, noticeWorkspace); - /* Discard the unexpected message; good idea?? */ - conn->inStart = conn->inEnd; - return; - } - break; - case 'B': /* Binary data tuple */ - if (conn->result != NULL) - { - /* Read another tuple of a normal query response */ - if (getAnotherTuple(conn, TRUE)) - return; - } - else - { - snprintf(noticeWorkspace, sizeof(noticeWorkspace), - libpq_gettext("server sent binary data (\"B\" message) without prior row description (\"T\" message)\n")); - DONOTICE(conn, noticeWorkspace); - /* Discard the unexpected message; good idea?? */ - conn->inStart = conn->inEnd; - return; - } - break; - case 'G': /* Start Copy In */ - conn->asyncStatus = PGASYNC_COPY_IN; - break; - case 'H': /* Start Copy Out */ - conn->asyncStatus = PGASYNC_COPY_OUT; - break; - default: - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext( - "unexpected response from server; first received character was \"%c\"\n"), - id); - /* build an error result holding the error message */ - saveErrorResult(conn); - /* Discard the unexpected message; good idea?? */ - conn->inStart = conn->inEnd; - conn->asyncStatus = PGASYNC_READY; - return; - } /* switch on protocol character */ - } - /* Successfully consumed this message */ - conn->inStart = conn->inCursor; - } -} - - -/* - * parseInput subroutine to read a 'T' (row descriptions) message. - * We build a PGresult structure containing the attribute data. - * Returns: 0 if completed message, EOF if not enough data yet. - * - * Note that if we run out of data, we have to release the partially - * constructed PGresult, and rebuild it again next time. Fortunately, - * that shouldn't happen often, since 'T' messages usually fit in a packet. - */ - -static int -getRowDescriptions(PGconn *conn) -{ - PGresult *result; - int nfields; - int i; - - result = PQmakeEmptyPGresult(conn, PGRES_TUPLES_OK); - - /* parseInput already read the 'T' label. */ - /* the next two bytes are the number of fields */ - if (pqGetInt(&(result->numAttributes), 2, conn)) - { - PQclear(result); - return EOF; - } - nfields = result->numAttributes; - - /* allocate space for the attribute descriptors */ - if (nfields > 0) - { - result->attDescs = (PGresAttDesc *) - pqResultAlloc(result, nfields * sizeof(PGresAttDesc), TRUE); - MemSet((char *) result->attDescs, 0, nfields * sizeof(PGresAttDesc)); - } - - /* get type info */ - for (i = 0; i < nfields; i++) - { - int typid; - int typlen; - int atttypmod; - - if (pqGets(&conn->workBuffer, conn) || - pqGetInt(&typid, 4, conn) || - pqGetInt(&typlen, 2, conn) || - pqGetInt(&atttypmod, 4, conn)) - { - PQclear(result); - return EOF; - } - - /* - * Since pqGetInt treats 2-byte integers as unsigned, we need to - * coerce the special value "-1" to signed form. (-1 is sent for - * variable-length fields.) Formerly, libpq effectively did a - * sign-extension on the 2-byte value by storing it in a signed - * short. Now we only coerce the single value 65535 == -1; values - * 32768..65534 are taken as valid field lengths. - */ - if (typlen == 0xFFFF) - typlen = -1; - result->attDescs[i].name = pqResultStrdup(result, - conn->workBuffer.data); - result->attDescs[i].typid = typid; - result->attDescs[i].typlen = typlen; - result->attDescs[i].atttypmod = atttypmod; - } - - /* Success! */ - conn->result = result; - return 0; -} - -/* - * parseInput subroutine to read a 'B' or 'D' (row data) message. - * We add another tuple to the existing PGresult structure. - * Returns: 0 if completed message, EOF if error or not enough data yet. - * - * Note that if we run out of data, we have to suspend and reprocess - * the message after more data is received. We keep a partially constructed - * tuple in conn->curTuple, and avoid reallocating already-allocated storage. - */ - -static int -getAnotherTuple(PGconn *conn, int binary) -{ - PGresult *result = conn->result; - int nfields = result->numAttributes; - PGresAttValue *tup; - - /* the backend sends us a bitmap of which attributes are null */ - char std_bitmap[64]; /* used unless it doesn't fit */ - char *bitmap = std_bitmap; - int i; - size_t nbytes; /* the number of bytes in bitmap */ - char bmap; /* One byte of the bitmap */ - int bitmap_index; /* Its index */ - int bitcnt; /* number of bits examined in current byte */ - int vlen; /* length of the current field value */ - - result->binary = binary; - - /* Allocate tuple space if first time for this data message */ - if (conn->curTuple == NULL) - { - conn->curTuple = (PGresAttValue *) - pqResultAlloc(result, nfields * sizeof(PGresAttValue), TRUE); - if (conn->curTuple == NULL) - goto outOfMemory; - MemSet((char *) conn->curTuple, 0, nfields * sizeof(PGresAttValue)); - } - tup = conn->curTuple; - - /* Get the null-value bitmap */ - nbytes = (nfields + BYTELEN - 1) / BYTELEN; - /* malloc() only for unusually large field counts... */ - if (nbytes > sizeof(std_bitmap)) - bitmap = (char *) malloc(nbytes); - - if (pqGetnchar(bitmap, nbytes, conn)) - goto EOFexit; - - /* Scan the fields */ - bitmap_index = 0; - bmap = bitmap[bitmap_index]; - bitcnt = 0; - - for (i = 0; i < nfields; i++) - { - if (!(bmap & 0200)) - { - /* if the field value is absent, make it a null string */ - tup[i].value = result->null_field; - tup[i].len = NULL_LEN; - } - else - { - /* get the value length (the first four bytes are for length) */ - if (pqGetInt(&vlen, 4, conn)) - goto EOFexit; - if (binary == 0) - vlen = vlen - 4; - if (vlen < 0) - vlen = 0; - if (tup[i].value == NULL) - { - tup[i].value = (char *) pqResultAlloc(result, vlen + 1, (bool) binary); - if (tup[i].value == NULL) - goto outOfMemory; - } - tup[i].len = vlen; - /* read in the value */ - if (vlen > 0) - if (pqGetnchar((char *) (tup[i].value), vlen, conn)) - goto EOFexit; - /* we have to terminate this ourselves */ - tup[i].value[vlen] = '\0'; - } - /* advance the bitmap stuff */ - bitcnt++; - if (bitcnt == BYTELEN) - { - bitmap_index++; - bmap = bitmap[bitmap_index]; - bitcnt = 0; - } - else - bmap <<= 1; - } - - /* Success! Store the completed tuple in the result */ - if (!addTuple(result, tup)) - goto outOfMemory; - /* and reset for a new message */ - conn->curTuple = NULL; - - if (bitmap != std_bitmap) - free(bitmap); - return 0; - -outOfMemory: - /* Replace partially constructed result with an error result */ - - /* - * we do NOT use saveErrorResult() here, because of the likelihood - * that there's not enough memory to concatenate messages... - */ - pqClearAsyncResult(conn); - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("out of memory\n")); - conn->result = PQmakeEmptyPGresult(conn, PGRES_FATAL_ERROR); - conn->asyncStatus = PGASYNC_READY; - /* Discard the failed message --- good idea? */ - conn->inStart = conn->inEnd; - -EOFexit: - if (bitmap != std_bitmap) - free(bitmap); - return EOF; -} - - -/* - * PQisBusy - * Return TRUE if PQgetResult would block waiting for input. - */ - -int -PQisBusy(PGconn *conn) -{ - if (!conn) - return FALSE; - - /* Parse any available data, if our state permits. */ - parseInput(conn); - - /* PQgetResult will return immediately in all states except BUSY. */ - return conn->asyncStatus == PGASYNC_BUSY; -} - - -/* - * PQgetResult - * Get the next PGresult produced by a query. - * Returns NULL if and only if no query work remains. - */ - -PGresult * -PQgetResult(PGconn *conn) -{ - PGresult *res; - - if (!conn) - return NULL; - - /* Parse any available data, if our state permits. */ - parseInput(conn); - - /* If not ready to return something, block until we are. */ - while (conn->asyncStatus == PGASYNC_BUSY) - { - /* Wait for some more data, and load it. */ - if (pqWait(TRUE, FALSE, conn) || - pqReadData(conn) < 0) - { - /* - * conn->errorMessage has been set by pqWait or pqReadData. We - * want to append it to any already-received error message. - */ - saveErrorResult(conn); - conn->asyncStatus = PGASYNC_IDLE; - return prepareAsyncResult(conn); - } - /* Parse it. */ - parseInput(conn); - } - - /* Return the appropriate thing. */ - switch (conn->asyncStatus) - { - case PGASYNC_IDLE: - res = NULL; /* query is complete */ - break; - case PGASYNC_READY: - res = prepareAsyncResult(conn); - /* Set the state back to BUSY, allowing parsing to proceed. */ - conn->asyncStatus = PGASYNC_BUSY; - break; - case PGASYNC_COPY_IN: - res = PQmakeEmptyPGresult(conn, PGRES_COPY_IN); - break; - case PGASYNC_COPY_OUT: - res = PQmakeEmptyPGresult(conn, PGRES_COPY_OUT); - break; - default: - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("unexpected asyncStatus: %d\n"), - (int) conn->asyncStatus); - res = PQmakeEmptyPGresult(conn, PGRES_FATAL_ERROR); - break; - } - - return res; -} - - -/* - * PQexec - * send a query to the backend and package up the result in a PGresult - * - * If the query was not even sent, return NULL; conn->errorMessage is set to - * a relevant message. - * If the query was sent, a new PGresult is returned (which could indicate - * either success or failure). - * The user is responsible for freeing the PGresult via PQclear() - * when done with it. - */ - -PGresult * -PQexec(PGconn *conn, const char *query) -{ - PGresult *result; - PGresult *lastResult; - bool savedblocking; - - /* - * we assume anyone calling PQexec wants blocking behaviour, we force - * the blocking status of the connection to blocking for the duration - * of this function and restore it on return - */ - savedblocking = pqIsnonblocking(conn); - if (PQsetnonblocking(conn, FALSE) == -1) - return NULL; - - /* - * Silently discard any prior query result that application didn't - * eat. This is probably poor design, but it's here for backward - * compatibility. - */ - while ((result = PQgetResult(conn)) != NULL) - { - if (result->resultStatus == PGRES_COPY_IN || - result->resultStatus == PGRES_COPY_OUT) - { - PQclear(result); - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("COPY state must be terminated first\n")); - /* restore blocking status */ - goto errout; - } - PQclear(result); - } - - /* OK to send the message */ - if (!PQsendQuery(conn, query)) - goto errout; /* restore blocking status */ - - /* - * For backwards compatibility, return the last result if there are - * more than one --- but merge error messages if we get more than one - * error result. - * - * We have to stop if we see copy in/out, however. We will resume parsing - * when application calls PQendcopy. - */ - lastResult = NULL; - while ((result = PQgetResult(conn)) != NULL) - { - if (lastResult) - { - if (lastResult->resultStatus == PGRES_FATAL_ERROR && - result->resultStatus == PGRES_FATAL_ERROR) - { - pqCatenateResultError(lastResult, result->errMsg); - PQclear(result); - result = lastResult; - /* Make sure PQerrorMessage agrees with catenated result */ - resetPQExpBuffer(&conn->errorMessage); - appendPQExpBufferStr(&conn->errorMessage, result->errMsg); - } - else - PQclear(lastResult); - } - lastResult = result; - if (result->resultStatus == PGRES_COPY_IN || - result->resultStatus == PGRES_COPY_OUT) - break; - } - - if (PQsetnonblocking(conn, savedblocking) == -1) - return NULL; - return lastResult; - -errout: - if (PQsetnonblocking(conn, savedblocking) == -1) - return NULL; - return NULL; -} - - -/* - * Attempt to read a Notice response message. - * This is possible in several places, so we break it out as a subroutine. - * Entry: 'N' flag character has already been consumed. - * Exit: returns 0 if successfully consumed Notice message. - * returns EOF if not enough data. - */ -static int -getNotice(PGconn *conn) -{ - /* - * Since the Notice might be pretty long, we create a temporary - * PQExpBuffer rather than using conn->workBuffer. workBuffer is - * intended for stuff that is expected to be short. - */ - PQExpBufferData noticeBuf; - - initPQExpBuffer(¬iceBuf); - if (pqGets(¬iceBuf, conn)) - { - termPQExpBuffer(¬iceBuf); - return EOF; - } - DONOTICE(conn, noticeBuf.data); - termPQExpBuffer(¬iceBuf); - return 0; -} - -/* - * Attempt to read a Notify response message. - * This is possible in several places, so we break it out as a subroutine. - * Entry: 'A' flag character has already been consumed. - * Exit: returns 0 if successfully consumed Notify message. - * returns EOF if not enough data. - */ -static int -getNotify(PGconn *conn) -{ - int be_pid; - PGnotify *newNotify; - - if (pqGetInt(&be_pid, 4, conn)) - return EOF; - if (pqGets(&conn->workBuffer, conn)) - return EOF; - - /* - * Store the relation name right after the PQnotify structure so it can - * all be freed at once. We don't use NAMEDATALEN because we don't - * want to tie this interface to a specific server name length. - */ - newNotify = (PGnotify *) malloc(sizeof(PGnotify) + - strlen(conn->workBuffer.data) + 1); - newNotify->relname = (char *)newNotify + sizeof(PGnotify); - strcpy(newNotify->relname, conn->workBuffer.data); - newNotify->be_pid = be_pid; - DLAddTail(conn->notifyList, DLNewElem(newNotify)); - return 0; -} - -/* - * PQnotifies - * returns a PGnotify* structure of the latest async notification - * that has not yet been handled - * - * returns NULL, if there is currently - * no unhandled async notification from the backend - * - * the CALLER is responsible for FREE'ing the structure returned - */ - -PGnotify * -PQnotifies(PGconn *conn) -{ - Dlelem *e; - PGnotify *event; - - if (!conn) - return NULL; - - /* Parse any available data to see if we can extract NOTIFY messages. */ - parseInput(conn); - - /* RemHead returns NULL if list is empty */ - e = DLRemHead(conn->notifyList); - if (!e) - return NULL; - event = (PGnotify *) DLE_VAL(e); - DLFreeElem(e); - return event; -} - -/* - * PQfreeNotify - free's the memory associated with a PGnotify - * - * This function is needed on Windows when using libpq.dll and - * for example libpgtcl.dll: All memory allocated inside a dll - * should be freed in the context of the same dll. - * - */ -void -PQfreeNotify(PGnotify *notify) -{ - free(notify); -} - -/* - * PQgetline - gets a newline-terminated string from the backend. - * - * Chiefly here so that applications can use "COPY <rel> to stdout" - * and read the output string. Returns a null-terminated string in s. - * - * PQgetline reads up to maxlen-1 characters (like fgets(3)) but strips - * the terminating \n (like gets(3)). - * - * CAUTION: the caller is responsible for detecting the end-of-copy signal - * (a line containing just "\.") when using this routine. - * - * RETURNS: - * EOF if it is detected or invalid arguments are given - * 0 if EOL is reached (i.e., \n has been read) - * (this is required for backward-compatibility -- this - * routine used to always return EOF or 0, assuming that - * the line ended within maxlen bytes.) - * 1 in other cases (i.e., the buffer was filled before \n is reached) - */ -int -PQgetline(PGconn *conn, char *s, int maxlen) -{ - int result = 1; /* return value if buffer overflows */ - - if (!s || maxlen <= 0) - return EOF; - - if (!conn || conn->sock < 0) - { - *s = '\0'; - return EOF; - } - - /* - * Since this is a purely synchronous routine, we don't bother to - * maintain conn->inCursor; there is no need to back up. - */ - while (maxlen > 1) - { - if (conn->inStart < conn->inEnd) - { - char c = conn->inBuffer[conn->inStart++]; - - if (c == '\n') - { - result = 0; /* success exit */ - break; - } - *s++ = c; - maxlen--; - } - else - { - /* need to load more data */ - if (pqWait(TRUE, FALSE, conn) || - pqReadData(conn) < 0) - { - result = EOF; - break; - } - } - } - *s = '\0'; - - return result; -} - -/* - * PQgetlineAsync - gets a newline-terminated string without blocking. - * - * This routine is for applications that want to do "COPY <rel> to stdout" - * asynchronously, that is without blocking. Having issued the COPY command - * and gotten a PGRES_COPY_OUT response, the app should call PQconsumeInput - * and this routine until the end-of-data signal is detected. Unlike - * PQgetline, this routine takes responsibility for detecting end-of-data. - * - * On each call, PQgetlineAsync will return data if a complete newline- - * terminated data line is available in libpq's input buffer, or if the - * incoming data line is too long to fit in the buffer offered by the caller. - * Otherwise, no data is returned until the rest of the line arrives. - * - * If -1 is returned, the end-of-data signal has been recognized (and removed - * from libpq's input buffer). The caller *must* next call PQendcopy and - * then return to normal processing. - * - * RETURNS: - * -1 if the end-of-copy-data marker has been recognized - * 0 if no data is available - * >0 the number of bytes returned. - * The data returned will not extend beyond a newline character. If possible - * a whole line will be returned at one time. But if the buffer offered by - * the caller is too small to hold a line sent by the backend, then a partial - * data line will be returned. This can be detected by testing whether the - * last returned byte is '\n' or not. - * The returned string is *not* null-terminated. - */ - -int -PQgetlineAsync(PGconn *conn, char *buffer, int bufsize) -{ - int avail; - - if (!conn || conn->asyncStatus != PGASYNC_COPY_OUT) - return -1; /* we are not doing a copy... */ - - /* - * Move data from libpq's buffer to the caller's. We want to accept - * data only in units of whole lines, not partial lines. This ensures - * that we can recognize the terminator line "\\.\n". (Otherwise, if - * it happened to cross a packet/buffer boundary, we might hand the - * first one or two characters off to the caller, which we shouldn't.) - */ - - conn->inCursor = conn->inStart; - - avail = bufsize; - while (avail > 0 && conn->inCursor < conn->inEnd) - { - char c = conn->inBuffer[conn->inCursor++]; - - *buffer++ = c; - --avail; - if (c == '\n') - { - /* Got a complete line; mark the data removed from libpq */ - conn->inStart = conn->inCursor; - /* Is it the endmarker line? */ - if (bufsize - avail == 3 && buffer[-3] == '\\' && buffer[-2] == '.') - return -1; - /* No, return the data line to the caller */ - return bufsize - avail; - } - } - - /* - * We don't have a complete line. We'd prefer to leave it in libpq's - * buffer until the rest arrives, but there is a special case: what if - * the line is longer than the buffer the caller is offering us? In - * that case we'd better hand over a partial line, else we'd get into - * an infinite loop. Do this in a way that ensures we can't - * misrecognize a terminator line later: leave last 3 characters in - * libpq buffer. - */ - if (avail == 0 && bufsize > 3) - { - conn->inStart = conn->inCursor - 3; - return bufsize - 3; - } - return 0; -} - -/* - * PQputline -- sends a string to the backend. - * Returns 0 if OK, EOF if not. - * - * Chiefly here so that applications can use "COPY <rel> from stdin". - */ -int -PQputline(PGconn *conn, const char *s) -{ - if (!conn || conn->sock < 0) - return EOF; - return pqPutnchar(s, strlen(s), conn); -} - -/* - * PQputnbytes -- like PQputline, but buffer need not be null-terminated. - * Returns 0 if OK, EOF if not. - */ -int -PQputnbytes(PGconn *conn, const char *buffer, int nbytes) -{ - if (!conn || conn->sock < 0) - return EOF; - return pqPutnchar(buffer, nbytes, conn); -} - -/* - * PQendcopy - * After completing the data transfer portion of a copy in/out, - * the application must call this routine to finish the command protocol. - * - * RETURNS: - * 0 on success - * 1 on failure - */ -int -PQendcopy(PGconn *conn) -{ - PGresult *result; - - if (!conn) - return 0; - - if (conn->asyncStatus != PGASYNC_COPY_IN && - conn->asyncStatus != PGASYNC_COPY_OUT) - { - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("no COPY in progress\n")); - return 1; - } - - /* - * make sure no data is waiting to be sent, abort if we are - * non-blocking and the flush fails - */ - if (pqFlush(conn) && pqIsnonblocking(conn)) - return (1); - - /* non blocking connections may have to abort at this point. */ - if (pqIsnonblocking(conn) && PQisBusy(conn)) - return (1); - - /* Return to active duty */ - conn->asyncStatus = PGASYNC_BUSY; - resetPQExpBuffer(&conn->errorMessage); - - /* Wait for the completion response */ - result = PQgetResult(conn); - - /* Expecting a successful result */ - if (result && result->resultStatus == PGRES_COMMAND_OK) - { - PQclear(result); - return 0; - } - - /* - * Trouble. The worst case is that we've lost sync with the backend - * entirely due to application screwup of the copy in/out protocol. To - * recover, reset the connection (talk about using a sledgehammer...) - */ - PQclear(result); - - if (conn->errorMessage.len > 0) - DONOTICE(conn, conn->errorMessage.data); - - DONOTICE(conn, libpq_gettext("lost synchronization with server, resetting connection\n")); - - /* - * Users doing non-blocking connections need to handle the reset - * themselves, they'll need to check the connection status if we - * return an error. - */ - if (pqIsnonblocking(conn)) - PQresetStart(conn); - else - PQreset(conn); - - return 1; -} - - -/* ---------------- - * PQfn - Send a function call to the POSTGRES backend. - * - * conn : backend connection - * fnid : function id - * result_buf : pointer to result buffer (&int if integer) - * result_len : length of return value. - * actual_result_len: actual length returned. (differs from result_len - * for varlena structures.) - * result_type : If the result is an integer, this must be 1, - * otherwise this should be 0 - * args : pointer to an array of function arguments. - * (each has length, if integer, and value/pointer) - * nargs : # of arguments in args array. - * - * RETURNS - * PGresult with status = PGRES_COMMAND_OK if successful. - * *actual_result_len is > 0 if there is a return value, 0 if not. - * PGresult with status = PGRES_FATAL_ERROR if backend returns an error. - * NULL on communications failure. conn->errorMessage will be set. - * ---------------- - */ - -PGresult * -PQfn(PGconn *conn, - int fnid, - int *result_buf, - int *actual_result_len, - int result_is_int, - const PQArgBlock *args, - int nargs) -{ - bool needInput = false; - ExecStatusType status = PGRES_FATAL_ERROR; - char id; - int i; - - *actual_result_len = 0; - - if (!conn) - return NULL; - - /* clear the error string */ - resetPQExpBuffer(&conn->errorMessage); - - if (conn->sock < 0 || conn->asyncStatus != PGASYNC_IDLE || - conn->result != NULL) - { - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("connection in wrong state\n")); - return NULL; - } - - if (pqPuts("F ", conn) != 0 || /* function */ - pqPutInt(fnid, 4, conn) != 0 || /* function id */ - pqPutInt(nargs, 4, conn) != 0) /* # of args */ - { - handleSendFailure(conn); - return NULL; - } - - for (i = 0; i < nargs; ++i) - { /* len.int4 + contents */ - if (pqPutInt(args[i].len, 4, conn)) - { - handleSendFailure(conn); - return NULL; - } - - if (args[i].isint) - { - if (pqPutInt(args[i].u.integer, 4, conn)) - { - handleSendFailure(conn); - return NULL; - } - } - else - { - if (pqPutnchar((char *) args[i].u.ptr, args[i].len, conn)) - { - handleSendFailure(conn); - return NULL; - } - } - } - if (pqFlush(conn)) - { - handleSendFailure(conn); - return NULL; - } - - for (;;) - { - if (needInput) - { - /* Wait for some data to arrive (or for the channel to close) */ - if (pqWait(TRUE, FALSE, conn) || - pqReadData(conn) < 0) - break; - } - - /* - * Scan the message. If we run out of data, loop around to try - * again. - */ - conn->inCursor = conn->inStart; - needInput = true; - - if (pqGetc(&id, conn)) - continue; - - /* - * We should see V or E response to the command, but might get N - * and/or A notices first. We also need to swallow the final Z - * before returning. - */ - switch (id) - { - case 'V': /* function result */ - if (pqGetc(&id, conn)) - continue; - if (id == 'G') - { - /* function returned nonempty value */ - if (pqGetInt(actual_result_len, 4, conn)) - continue; - if (result_is_int) - { - if (pqGetInt(result_buf, 4, conn)) - continue; - } - else - { - if (pqGetnchar((char *) result_buf, - *actual_result_len, - conn)) - continue; - } - if (pqGetc(&id, conn)) /* get the last '0' */ - continue; - } - if (id == '0') - { - /* correctly finished function result message */ - status = PGRES_COMMAND_OK; - } - else - { - /* The backend violates the protocol. */ - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("protocol error: id=0x%x\n"), - id); - saveErrorResult(conn); - conn->inStart = conn->inCursor; - return prepareAsyncResult(conn); - } - break; - case 'E': /* error return */ - if (pqGets(&conn->errorMessage, conn)) - continue; - /* build an error result holding the error message */ - saveErrorResult(conn); - status = PGRES_FATAL_ERROR; - break; - case 'A': /* notify message */ - /* handle notify and go back to processing return values */ - if (getNotify(conn)) - continue; - break; - case 'N': /* notice */ - /* handle notice and go back to processing return values */ - if (getNotice(conn)) - continue; - break; - case 'Z': /* backend is ready for new query */ - /* consume the message and exit */ - conn->inStart = conn->inCursor; - /* if we saved a result object (probably an error), use it */ - if (conn->result) - return prepareAsyncResult(conn); - return PQmakeEmptyPGresult(conn, status); - default: - /* The backend violates the protocol. */ - printfPQExpBuffer(&conn->errorMessage, - libpq_gettext("protocol error: id=0x%x\n"), - id); - saveErrorResult(conn); - conn->inStart = conn->inCursor; - return prepareAsyncResult(conn); - } - /* Completed this message, keep going */ - conn->inStart = conn->inCursor; - needInput = false; - } - - /* - * We fall out of the loop only upon failing to read data. - * conn->errorMessage has been set by pqWait or pqReadData. We want to - * append it to any already-received error message. - */ - saveErrorResult(conn); - return prepareAsyncResult(conn); -} - - -/* ====== accessor funcs for PGresult ======== */ - -ExecStatusType -PQresultStatus(const PGresult *res) -{ - if (!res) - return PGRES_NONFATAL_ERROR; - return res->resultStatus; -} - -char * -PQresStatus(ExecStatusType status) -{ - if (status < 0 || status >= sizeof pgresStatus / sizeof pgresStatus[0]) - return libpq_gettext("invalid ExecStatusType code"); - return pgresStatus[status]; -} - -char * -PQresultErrorMessage(const PGresult *res) -{ - if (!res || !res->errMsg) - return ""; - return res->errMsg; -} - -int -PQntuples(const PGresult *res) -{ - if (!res) - return 0; - return res->ntups; -} - -int -PQnfields(const PGresult *res) -{ - if (!res) - return 0; - return res->numAttributes; -} - -int -PQbinaryTuples(const PGresult *res) -{ - if (!res) - return 0; - return res->binary; -} - -/* - * Helper routines to range-check field numbers and tuple numbers. - * Return TRUE if OK, FALSE if not - */ - -static int -check_field_number(const PGresult *res, int field_num) -{ - char noticeBuf[128]; - - if (!res) - return FALSE; /* no way to display error message... */ - if (field_num < 0 || field_num >= res->numAttributes) - { - if (res->noticeHook) - { - snprintf(noticeBuf, sizeof(noticeBuf), - libpq_gettext("column number %d is out of range 0..%d\n"), - field_num, res->numAttributes - 1); - DONOTICE(res, noticeBuf); - } - return FALSE; - } - return TRUE; -} - -static int -check_tuple_field_number(const PGresult *res, - int tup_num, int field_num) -{ - char noticeBuf[128]; - - if (!res) - return FALSE; /* no way to display error message... */ - if (tup_num < 0 || tup_num >= res->ntups) - { - if (res->noticeHook) - { - snprintf(noticeBuf, sizeof(noticeBuf), - libpq_gettext("row number %d is out of range 0..%d\n"), - tup_num, res->ntups - 1); - DONOTICE(res, noticeBuf); - } - return FALSE; - } - if (field_num < 0 || field_num >= res->numAttributes) - { - if (res->noticeHook) - { - snprintf(noticeBuf, sizeof(noticeBuf), - libpq_gettext("column number %d is out of range 0..%d\n"), - field_num, res->numAttributes - 1); - DONOTICE(res, noticeBuf); - } - return FALSE; - } - return TRUE; -} - -/* - returns NULL if the field_num is invalid -*/ -char * -PQfname(const PGresult *res, int field_num) -{ - if (!check_field_number(res, field_num)) - return NULL; - if (res->attDescs) - return res->attDescs[field_num].name; - else - return NULL; -} - -/* - returns -1 on a bad field name -*/ -int -PQfnumber(const PGresult *res, const char *field_name) -{ - int i; - char *field_case; - - if (!res) - return -1; - - if (field_name == NULL || - field_name[0] == '\0' || - res->attDescs == NULL) - return -1; - - field_case = strdup(field_name); - if (*field_case == '"') - { - strcpy(field_case, field_case + 1); - *(field_case + strlen(field_case) - 1) = '\0'; - } - else - for (i = 0; field_case[i]; i++) - if (isupper((unsigned char) field_case[i])) - field_case[i] = tolower((unsigned char) field_case[i]); - - for (i = 0; i < res->numAttributes; i++) - { - if (strcmp(field_case, res->attDescs[i].name) == 0) - { - free(field_case); - return i; - } - } - free(field_case); - return -1; -} - -Oid -PQftype(const PGresult *res, int field_num) -{ - if (!check_field_number(res, field_num)) - return InvalidOid; - if (res->attDescs) - return res->attDescs[field_num].typid; - else - return InvalidOid; -} - -int -PQfsize(const PGresult *res, int field_num) -{ - if (!check_field_number(res, field_num)) - return 0; - if (res->attDescs) - return res->attDescs[field_num].typlen; - else - return 0; -} - -int -PQfmod(const PGresult *res, int field_num) -{ - if (!check_field_number(res, field_num)) - return 0; - if (res->attDescs) - return res->attDescs[field_num].atttypmod; - else - return 0; -} - -char * -PQcmdStatus(PGresult *res) -{ - if (!res) - return NULL; - return res->cmdStatus; -} - -/* - PQoidStatus - - if the last command was an INSERT, return the oid string - if not, return "" -*/ -char * -PQoidStatus(const PGresult *res) -{ - /* - * This must be enough to hold the result. Don't laugh, this is better - * than what this function used to do. - */ - static char buf[24]; - - size_t len; - - if (!res || !res->cmdStatus || strncmp(res->cmdStatus, "INSERT ", 7) != 0) - return ""; - - len = strspn(res->cmdStatus + 7, "0123456789"); - if (len > 23) - len = 23; - strncpy(buf, res->cmdStatus + 7, len); - buf[len] = '\0'; - - return buf; -} - -/* - PQoidValue - - a perhaps preferable form of the above which just returns - an Oid type -*/ -Oid -PQoidValue(const PGresult *res) -{ - char *endptr = NULL; - unsigned long result; - - if (!res || !res->cmdStatus || strncmp(res->cmdStatus, "INSERT ", 7) != 0) - return InvalidOid; - -#ifdef WIN32 - SetLastError(0); -#else - errno = 0; -#endif - result = strtoul(res->cmdStatus + 7, &endptr, 10); - - if (!endptr || (*endptr != ' ' && *endptr != '\0') || errno == ERANGE) - return InvalidOid; - else - return (Oid) result; -} - - -/* - PQcmdTuples - - if the last command was an INSERT/UPDATE/DELETE, return number - of inserted/affected tuples, if not, return "" -*/ -char * -PQcmdTuples(PGresult *res) -{ - char noticeBuf[128]; - - if (!res) - return ""; - - if (strncmp(res->cmdStatus, "INSERT", 6) == 0 || - strncmp(res->cmdStatus, "DELETE", 6) == 0 || - strncmp(res->cmdStatus, "UPDATE", 6) == 0) - { - char *p = res->cmdStatus + 6; - - if (*p == 0) - { - if (res->noticeHook) - { - snprintf(noticeBuf, sizeof(noticeBuf), - libpq_gettext("could not interpret result from server: %s\n"), - res->cmdStatus); - DONOTICE(res, noticeBuf); - } - return ""; - } - p++; - if (*(res->cmdStatus) != 'I') /* UPDATE/DELETE */ - return p; - while (*p != ' ' && *p) - p++; /* INSERT: skip oid */ - if (*p == 0) - { - if (res->noticeHook) - { - snprintf(noticeBuf, sizeof(noticeBuf), - libpq_gettext("no row count available\n")); - DONOTICE(res, noticeBuf); - } - return ""; - } - p++; - return p; - } - return ""; -} - -/* - PQgetvalue: - return the value of field 'field_num' of row 'tup_num' - - If res is binary, then the value returned is NOT a null-terminated - ASCII string, but the binary representation in the server's native - format. - - if res is not binary, a null-terminated ASCII string is returned. -*/ -char * -PQgetvalue(const PGresult *res, int tup_num, int field_num) -{ - if (!check_tuple_field_number(res, tup_num, field_num)) - return NULL; - return res->tuples[tup_num][field_num].value; -} - -/* PQgetlength: - returns the length of a field value in bytes. If res is binary, - i.e. a result of a binary portal, then the length returned does - NOT include the size field of the varlena. (The data returned - by PQgetvalue doesn't either.) -*/ -int -PQgetlength(const PGresult *res, int tup_num, int field_num) -{ - if (!check_tuple_field_number(res, tup_num, field_num)) - return 0; - if (res->tuples[tup_num][field_num].len != NULL_LEN) - return res->tuples[tup_num][field_num].len; - else - return 0; -} - -/* PQgetisnull: - returns the null status of a field value. -*/ -int -PQgetisnull(const PGresult *res, int tup_num, int field_num) -{ - if (!check_tuple_field_number(res, tup_num, field_num)) - return 1; /* pretend it is null */ - if (res->tuples[tup_num][field_num].len == NULL_LEN) - return 1; - else - return 0; -} - -/* PQsetnonblocking: - sets the PGconn's database connection non-blocking if the arg is TRUE - or makes it non-blocking if the arg is FALSE, this will not protect - you from PQexec(), you'll only be safe when using the non-blocking - API - Needs to be called only on a connected database connection. -*/ - -int -PQsetnonblocking(PGconn *conn, int arg) -{ - - arg = (arg == TRUE) ? 1 : 0; - /* early out if the socket is already in the state requested */ - if (arg == conn->nonblocking) - return (0); - - /* - * to guarantee constancy for flushing/query/result-polling behavior - * we need to flush the send queue at this point in order to guarantee - * proper behavior. this is ok because either they are making a - * transition _from_ or _to_ blocking mode, either way we can block - * them. - */ - /* if we are going from blocking to non-blocking flush here */ - if (pqFlush(conn)) - return (-1); - - conn->nonblocking = arg; - - return (0); -} - -/* return the blocking status of the database connection, TRUE == nonblocking, - FALSE == blocking -*/ -int -PQisnonblocking(const PGconn *conn) -{ - - return (pqIsnonblocking(conn)); -} - -/* try to force data out, really only useful for non-blocking users */ -int -PQflush(PGconn *conn) -{ - - return (pqFlush(conn)); -} - -/* try to force data out, really only useful for non-blocking users. - * This implementation actually works for non-blocking connections */ -int -PQsendSome(PGconn *conn) -{ - return pqSendSome(conn); -} |