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Robert Haas 385f337c9f Allow foreign and custom joins to handle EvalPlanQual rechecks. 
Commit e7cb7ee145 provided basic
infrastructure for allowing a foreign data wrapper or custom scan
provider to replace a join of one or more tables with a scan.
However, this infrastructure failed to take into account the need
for possible EvalPlanQual rechecks, and ExecScanFetch would fail
an assertion (or just overwrite memory) if such a check was attempted
for a plan containing a pushed-down join.  To fix, adjust the EPQ
machinery to skip some processing steps when scanrelid == 0, making
those the responsibility of scan's recheck method, which also has
the responsibility in this case of correctly populating the relevant
slot.

To allow foreign scans to gain control in the right place to make
use of this new facility, add a new, optional RecheckForeignScan
method.  Also, allow a foreign scan to have a child plan, which can
be used to correctly populate the slot (or perhaps for something
else, but this is the only use currently envisioned).

KaiGai Kohei, reviewed by Robert Haas, Etsuro Fujita, and Kyotaro
Horiguchi.
 		2015-12-08 12:31:03 -05:00
..
adminpack Update copyright for 2015 2015-01-06 11:43:47 -05:00
auth_delay Add file version information to most installed Windows binaries. 2014-07-14 14:07:52 -04:00
auto_explain Rearrange explain.c's API so callers need not embed sizeof(ExplainState). 2015-01-15 13:39:33 -05:00
btree_gin pgindent run for 9.5 2015-05-23 21:35:49 -04:00
btree_gist Fix misc typos. 2015-09-05 11:35:49 +03:00
chkpass Avoid returning undefined bytes in chkpass_in(). 2015-02-14 12:20:56 -05:00
citext Fix incorrect declaration of citext's regexp_matches() functions. 2015-05-05 15:51:22 -04:00
cube Fix misc typos. 2015-09-05 11:35:49 +03:00
dblink Rearrange the handling of error context reports. 2015-09-05 11:58:33 -04:00
dict_int Update copyright for 2015 2015-01-06 11:43:47 -05:00
dict_xsyn Update copyright for 2015 2015-01-06 11:43:47 -05:00
earthdistance Add missed CREATE EXTENSION ... CASCADE regression test adjustment. 2015-10-03 21:31:51 +02:00
file_fdw Allow foreign and custom joins to handle EvalPlanQual rechecks. 2015-12-08 12:31:03 -05:00
fuzzystrmatch pgindent run for 9.5 2015-05-23 21:35:49 -04:00
hstore Dodge a macro-name conflict with Perl. 2015-11-19 14:54:11 -05:00
hstore_plperl Dodge a macro-name conflict with Perl. 2015-11-19 14:54:11 -05:00
hstore_plpython Dodge a macro-name conflict with Perl. 2015-11-19 14:54:11 -05:00
intagg Fix typos in some error messages thrown by extension scripts when fed to psql. 2014-08-25 18:30:37 +02:00
intarray Prevent stack overflow in query-type functions. 2015-10-05 10:06:30 -04:00
isn contrib/isn now needs a .gitignore file. 2015-08-02 23:57:32 -04:00
lo Fix typos in some error messages thrown by extension scripts when fed to psql. 2014-08-25 18:30:37 +02:00
ltree Prevent stack overflow in query-type functions. 2015-10-05 10:06:30 -04:00
ltree_plpython Add CASCADE support for CREATE EXTENSION. 2015-10-03 18:23:40 +02:00
oid2name Add file version information to most installed Windows binaries. 2014-07-14 14:07:52 -04:00
pageinspect Add forgotten file in commit d6061f83a1 2015-11-25 16:59:07 +03:00
passwordcheck Update copyright for 2015 2015-01-06 11:43:47 -05:00
pg_buffercache pgindent run for 9.5 2015-05-23 21:35:49 -04:00
pg_freespacemap Fix typos in some error messages thrown by extension scripts when fed to psql. 2014-08-25 18:30:37 +02:00
pg_prewarm Update copyright for 2015 2015-01-06 11:43:47 -05:00
pg_standby Don't use function definitions looking like old-style ones. 2015-08-15 17:25:00 +02:00
pg_stat_statements Improve contrib/pg_stat_statements' handling of garbage collection failure. 2015-10-04 17:58:42 -04:00
pg_trgm This supports the triconsistent function for pg_trgm GIN opclass 2015-07-20 18:18:48 +03:00
pgcrypto Avoid scan-build warning about uninitialized htonl() arguments. 2015-10-11 20:42:26 -04:00
pgrowlocks Optimize locking a tuple already locked by another subxact 2015-04-10 13:47:15 -03:00
pgstattuple Prevent pgstattuple() from reporting BRIN as unknown index. 2015-07-14 22:36:51 +09:00
postgres_fdw Allow foreign and custom joins to handle EvalPlanQual rechecks. 2015-12-08 12:31:03 -05:00
seg Move strategy numbers to include/access/stratnum.h 2015-05-15 17:03:16 -03:00
sepgsql Adjust sepgsql regression output for recent error context change 2015-09-06 11:25:36 -07:00
spi Collection of typo fixes. 2015-05-20 16:56:22 +03:00
sslinfo Fix error message wording in previous sslinfo commit 2015-09-08 11:10:20 -03:00
start-scripts Fix typo in linux startup script. 2015-04-26 09:43:15 -04:00
tablefunc Fix a number of places that produced XX000 errors in the regression tests. 2015-08-02 23:49:19 -04:00
tcn Update copyright for 2015 2015-01-06 11:43:47 -05:00
test_decoding Message style improvements 2015-10-28 20:38:36 -04:00
tsearch2 Add an optional missing_ok argument to SQL function current_setting(). 2015-07-02 16:41:07 -04:00
tsm_system_rows Redesign tablesample method API, and do extensive code review. 2015-07-25 14:39:00 -04:00
tsm_system_time Some platforms now need contrib/tsm_system_time to be linked with libm. 2015-07-25 16:37:12 -04:00
unaccent Make unaccent handle all diacritics known to Unicode, and expand ligatures correctly 2015-09-04 12:51:53 +03:00
uuid-ossp Update copyright for 2015 2015-01-06 11:43:47 -05:00
vacuumlo vacuumlo: Avoid unlikely memory leak. 2015-01-14 15:14:20 -05:00
xml2 Replace a bunch more uses of strncpy() with safer coding. 2015-01-24 13:05:42 -05:00
Makefile Finish removing pg_audit 2015-05-28 12:48:25 -04:00
README Rename 'gmake' to 'make' in docs and recommended commands 2014-02-12 17:29:19 -05:00
contrib-global.mk Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00

README 

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 "make all" and "make
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.