postgresql/contrib
Tom Lane 9e7e29c75a Fix planner problems with LATERAL references in PlaceHolderVars.
The planner largely failed to consider the possibility that a
PlaceHolderVar's expression might contain a lateral reference to a Var
coming from somewhere outside the PHV's syntactic scope.  We had a previous
report of a problem in this area, which I tried to fix in a quick-hack way
in commit 4da6439bd8, but Antonin Houska
pointed out that there were still some problems, and investigation turned
up other issues.  This patch largely reverts that commit in favor of a more
thoroughly thought-through solution.  The new theory is that a PHV's
ph_eval_at level cannot be higher than its original syntactic level.  If it
contains lateral references, those don't change the ph_eval_at level, but
rather they create a lateral-reference requirement for the ph_eval_at join
relation.  The code in joinpath.c needs to handle that.

Another issue is that createplan.c wasn't handling nested PlaceHolderVars
properly.

In passing, push knowledge of lateral-reference checks for join clauses
into join_clause_is_movable_to.  This is mainly so that FDWs don't need
to deal with it.

This patch doesn't fix the original join-qual-placement problem reported by
Jeremy Evans (and indeed, one of the new regression test cases shows the
wrong answer because of that).  But the PlaceHolderVar problems need to be
fixed before that issue can be addressed, so committing this separately
seems reasonable.
2013-08-17 20:22:37 -04:00
..
adminpack Update copyrights for 2013 2013-01-01 17:15:01 -05:00
auth_delay Limit values of archive_timeout, post_auth_delay, auth_delay.milliseconds. 2012-11-18 17:15:06 -05:00
auto_explain Update copyrights for 2013 2013-01-01 17:15:01 -05:00
btree_gin Throw a useful error message if an extension script file is fed to psql. 2011-10-12 15:45:03 -04:00
btree_gist pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
chkpass Throw a useful error message if an extension script file is fed to psql. 2011-10-12 15:45:03 -04:00
citext Reduce messages about implicit indexes and sequences to DEBUG1. 2012-07-04 20:35:29 -04:00
cube Fix contrib/cube and contrib/seg to build with bison 3.0. 2013-07-29 10:42:37 -04:00
dblink Fix typo in update scripts for some contrib modules. 2013-07-19 04:13:01 +09:00
dict_int Update copyrights for 2013 2013-01-01 17:15:01 -05:00
dict_xsyn Update copyrights for 2013 2013-01-01 17:15:01 -05:00
dummy_seclabel Update copyrights for 2013 2013-01-01 17:15:01 -05:00
earthdistance Throw a useful error message if an extension script file is fed to psql. 2011-10-12 15:45:03 -04:00
file_fdw pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
fuzzystrmatch Update copyrights for 2013 2013-01-01 17:15:01 -05:00
hstore Fix typo in update scripts for some contrib modules. 2013-07-19 04:13:01 +09:00
intagg Throw a useful error message if an extension script file is fed to psql. 2011-10-12 15:45:03 -04:00
intarray Remove unreachable code 2012-07-16 22:15:03 +03:00
isn Update copyrights for 2013 2013-01-01 17:15:01 -05:00
lo Throw a useful error message if an extension script file is fed to psql. 2011-10-12 15:45:03 -04:00
ltree Split tuple struct defs from htup.h to htup_details.h 2012-08-30 16:52:35 -04:00
oid2name pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
pageinspect Fix typo in update scripts for some contrib modules. 2013-07-19 04:13:01 +09:00
passwordcheck Update copyrights for 2013 2013-01-01 17:15:01 -05:00
pg_archivecleanup pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
pg_buffercache Split tuple struct defs from htup.h to htup_details.h 2012-08-30 16:52:35 -04:00
pg_freespacemap Throw a useful error message if an extension script file is fed to psql. 2011-10-12 15:45:03 -04:00
pg_standby pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
pg_stat_statements Fix typo in update scripts for some contrib modules. 2013-07-19 04:13:01 +09:00
pg_test_fsync pg_test_fsync: expand ops/sec display 2013-08-02 00:45:19 -04:00
pg_test_timing Remove undocumented -h (help) option 2013-07-01 12:40:33 -04:00
pg_trgm Fix typo in update scripts for some contrib modules. 2013-07-19 04:13:01 +09:00
pg_upgrade pg_upgrade: shut down server after auth failure 2013-08-16 11:09:09 -04:00
pg_upgrade_support Update copyrights for 2013 2013-01-01 17:15:01 -05:00
pg_xlogdump Fix off-by-one in pg_xlogdump -r option. 2013-06-04 18:51:43 +03:00
pgbench Add --rate option. 2013-07-23 08:40:22 +09:00
pgcrypto pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
pgrowlocks pgrowlocks: Use GetActiveSnapshot() rather than SnapshotNow. 2013-07-22 16:21:14 -04:00
pgstattuple pgstattuple: Use SnapshotDirty, not SnapshotNow. 2013-07-25 16:21:13 -04:00
postgres_fdw Fix planner problems with LATERAL references in PlaceHolderVars. 2013-08-17 20:22:37 -04:00
seg Fix contrib/cube and contrib/seg to build with bison 3.0. 2013-07-29 10:42:37 -04:00
sepgsql Use an MVCC snapshot, rather than SnapshotNow, for catalog scans. 2013-07-02 09:47:01 -04:00
spi Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
sslinfo Lots of doc corrections. 2012-04-23 22:43:09 -04:00
start-scripts Revert "pg_ctl: Add idempotent option" 2013-04-29 21:55:12 -04:00
tablefunc Update copyrights for 2013 2013-01-01 17:15:01 -05:00
tcn Update copyrights for 2013 2013-01-01 17:15:01 -05:00
test_parser Update copyrights for 2013 2013-01-01 17:15:01 -05:00
tsearch2 Update copyrights for 2013 2013-01-01 17:15:01 -05:00
unaccent pgindent run for release 9.3 2013-05-29 16:58:43 -04:00
uuid-ossp Update copyrights for 2013 2013-01-01 17:15:01 -05:00
vacuumlo vacuumlo: Use a cursor to limit client-side memory usage. 2013-07-15 10:51:27 -04:00
worker_spi Remove bgw_sighup and bgw_sigterm. 2013-07-22 14:13:00 -04:00
xml2 Split tuple struct defs from htup.h to htup_details.h 2012-08-30 16:52:35 -04:00
contrib-global.mk Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
Makefile contrib/Makefile also needs updated 2013-02-22 18:56:42 -03:00
README Update contrib/README 2012-04-14 09:29:54 +03:00

The PostgreSQL contrib tree
---------------------------

This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree.  This does not preclude their
usefulness.

User documentation for each module appears in the main SGML
documentation.

When building from the source distribution, these modules are not
built automatically, unless you build the "world" target.  You can
also build and install them all by running "gmake all" and "gmake
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.

Some directories supply new user-defined functions, operators, or
types.  To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command.  In a fresh database,
you can simply do

    CREATE EXTENSION module_name;

See the PostgreSQL documentation for more information about this
procedure.