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Tom Lane 9fd8843647 Fix mergejoin cost estimation so that we consider the statistical ranges of ... the two join variables at both ends: not only trailing rows that need not be scanned because there cannot be a match on the other side, but initial rows that will be scanned without possibly having a match. This allows a more realistic estimate of startup cost to be made, per recent pgsql-performance discussion. In passing, fix a couple of bugs that had crept into mergejoinscansel: it was not quite up to speed for the task of estimating descending-order scans, which is a new requirement in 8.3.		18 years ago
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bitmapset.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
execnodes.h	Avoid incrementing the CommandCounter when CommandCounterIncrement is called	18 years ago
makefuncs.h	Make eval_const_expressions() preserve typmod when simplifying something like	19 years ago
memnodes.h	Adjust the output of MemoryContextStats() so that the stats for a	19 years ago
nodeFuncs.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
nodes.h	Support SET FROM CURRENT in CREATE/ALTER FUNCTION, ALTER DATABASE, ALTER ROLE.	19 years ago
params.h	pgindent run for 8.3.	18 years ago
parsenodes.h	Code review for LIKE ... INCLUDING INDEXES patch. Fix failure to propagate	18 years ago
pg_list.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
plannodes.h	Re-run pgindent with updated list of typedefs. (Updated README should	18 years ago
primnodes.h	Actually ... it's pretty silly that parse_oper.c doesn't set up the	18 years ago
print.h	Turn the rangetable used by the executor into a flat list, and avoid storing	19 years ago
readfuncs.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
relation.h	Fix mergejoin cost estimation so that we consider the statistical ranges of	18 years ago
tidbitmap.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago
value.h	Update CVS HEAD for 2007 copyright. Back branches are typically not	19 years ago