Tom Lane 6fbc323c80 Further fallout from the MergeAppend patch. ... Fix things so that top-N sorting can be used in child Sort nodes of a MergeAppend node, when there is a LIMIT and no intervening joins or grouping. Actually doing this on the executor side isn't too bad, but it's a bit messier to get the planner to cost it properly. Per gripe from Robert Haas. In passing, fix an oversight in the original top-N-sorting patch: query_planner should not assume that a LIMIT can be used to make an explicit sort cheaper when there will be grouping or aggregation in between. Possibly this should be back-patched, but I'm not sure the mistake is serious enough to be a real problem in practice.		2010-11-18 00:30:10 -05:00
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bitmapset.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
execnodes.h	Avoid using a local FunctionCallInfoData struct in ExecMakeFunctionResult	2010-11-01 13:54:21 -04:00
makefuncs.h	Fix incorrect generation of whole-row variables in planner.	2010-10-19 15:09:23 -04:00
memnodes.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
nodeFuncs.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
nodes.h	Reimplement planner's handling of MIN/MAX aggregate optimization.	2010-11-04 12:01:17 -04:00
params.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
parsenodes.h	Provide hashing support for arrays.	2010-10-30 21:56:11 -04:00
pg_list.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
plannodes.h	Fix typos "are are".	2010-10-26 17:15:17 +09:00
primnodes.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
print.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
readfuncs.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
relation.h	Further fallout from the MergeAppend patch.	2010-11-18 00:30:10 -05:00
tidbitmap.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
value.h	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00