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Tom Lane cfa0f4255b Improve tests for whether we can skip queueing RI enforcement triggers. 
During an update of a PK row, we can skip firing the RI trigger if any old
key value is NULL, because then the row could not have had any matching
rows in the FK table.  Conversely, during an update of an FK row, the
outcome is determined if any new key value is NULL.  In either case it
becomes unnecessary to compare individual key values.

This patch was inspired by discussion of Vik Reykja's patch to use IS NOT
DISTINCT semantics for the key comparisons.  In the event there is no need
for that and so this patch looks nothing like his, but he should still get
credit for having re-opened consideration of the trigger skip logic.
2012-06-19 20:07:33 -04:00
..
access New SQL functons pg_backup_in_progress() and pg_backup_start_time() 2012-06-14 13:25:43 -04:00
bootstrap Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
catalog Refer to the default foreign key match style as MATCH SIMPLE internally. 2012-06-17 20:16:44 -04:00
commands Improve tests for whether we can skip queueing RI enforcement triggers. 2012-06-19 20:07:33 -04:00
datatype Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
executor Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
foreign Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
lib Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
libpq Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
mb Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
nodes Refer to the default foreign key match style as MATCH SIMPLE internally. 2012-06-17 20:16:44 -04:00
optimizer Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
parser Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
port Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
portability Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
postmaster Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
regex Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
replication Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
rewrite Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
snowball Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
storage Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
tcop Restructure SELECT INTO's parsetree representation into CreateTableAsStmt. 2012-03-19 21:38:12 -04:00
tsearch Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
utils Improve reporting of permission errors for array types 2012-06-15 22:55:03 +03:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
c.h Remove leftovers of BeOS port 2012-05-14 04:50:39 +03:00
fmgr.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
funcapi.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
getaddrinfo.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
getopt_long.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
Makefile Fix server header file installation with vpath builds 2011-11-10 20:52:54 +02:00
miscadmin.h Do stack-depth checking in all postmaster children. 2012-04-08 19:07:55 +03:00
pg_config.h.in Put back AC_REQUIRE([AC_STRUCT_TM]). 2012-05-14 23:06:48 -04:00
pg_config.h.win32 Stamp HEAD as 9.3devel. 2012-06-13 20:03:02 -04:00
pg_config_manual.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
pg_trace.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
pgstat.h Fix stats collector to recover nicely when system clock goes backwards. 2012-06-17 17:11:49 -04:00
pgtime.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
port.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
postgres.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
postgres_ext.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
postgres_fe.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
rusagestub.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
windowapi.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00