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Tom Lane 220e45bf32 Improve the planner's simplification of NOT constructs. 
This patch merges the responsibility for NOT-flattening into
eval_const_expressions' processing.  It wasn't done that way originally
because prepqual.c is far older than eval_const_expressions.  But putting
this work into eval_const_expressions saves one pass over the qual trees,
and in fact saves even more than that because we can exploit the knowledge
that the subexpressions have already been recursively simplified.  Doing it
this way also lets us do it uniformly over all expressions, whereas
prepqual.c formerly just did it at top level to save cycles.  That should
improve the planner's ability to recognize logically-equivalent constructs.

While at it, also add the ability to fold a NOT into BooleanTest and
NullTest constructs (the latter only for the scalar-datatype case).

Per discussion of bug #5702.
 		2010-10-10 23:19:50 -04:00
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access Improve logging in VACUUM FULL VERBOSE and CLUSTER VERBOSE. 2010-10-07 21:46:46 -04:00
bootstrap Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
catalog Support triggers on views. 2010-10-10 13:45:07 -04:00
commands Support triggers on views. 2010-10-10 13:45:07 -04:00
executor Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
foreign Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
lib Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
libpq Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
mb Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
nodes Support triggers on views. 2010-10-10 13:45:07 -04:00
optimizer Improve the planner's simplification of NOT constructs. 2010-10-10 23:19:50 -04:00
parser Add a SECURITY LABEL command. 2010-09-27 20:55:27 -04:00
port Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
portability Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
postmaster Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
regex Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
replication Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
rewrite Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
snowball Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
storage Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
tcop Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
tsearch Reduce the memory requirement for large ispell dictionaries. 2010-10-06 19:31:05 -04:00
utils Support triggers on views. 2010-10-10 13:45:07 -04:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
Makefile Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
c.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
fmgr.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
funcapi.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
getaddrinfo.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
getopt_long.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
miscadmin.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
pg_config.h.in Replace self written 'long long int' configure test by standard 'AC_TYPE_LONG_LONG_INT' macro call. 2010-05-25 17:28:20 +00:00
pg_config.h.win32 Stamp HEAD as 9.1devel. 2010-07-09 04:10:58 +00:00
pg_config_manual.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
pg_trace.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
pgstat.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
pgtime.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
port.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
postgres.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
postgres_ext.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
postgres_fe.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
rusagestub.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
windowapi.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00