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Tom Lane cc5e80b8d1 Teach planner about some cases where a restriction clause can be ... propagated inside an outer join. In particular, given LEFT JOIN ON (A = B) WHERE A = constant, we cannot conclude that B = constant at the top level (B might be null instead), but we can nonetheless put a restriction B = constant into the quals for B's relation, since no inner-side rows not meeting that condition can contribute to the final result. Similarly, given FULL JOIN USING (J) WHERE J = constant, we can't directly conclude that either input J variable = constant, but it's OK to push such quals into each input rel. Per recent gripe from Kim Bisgaard. Along the way, remove 'valid_everywhere' flag from RestrictInfo, as on closer analysis it was not being used for anything, and was defined backwards anyway.		21 years ago
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bitmapset.h	Marginal hack to avoid spending a lot of time in find_join_rel during	21 years ago
execnodes.h	Add Oracle-compatible GREATEST and LEAST functions. Pavel Stehule	21 years ago
makefuncs.h	Merge Resdom nodes into TargetEntry nodes to simplify code and save a	21 years ago
memnodes.h	Tag appropriate files for rc3	21 years ago
nodeFuncs.h	Tag appropriate files for rc3	21 years ago
nodes.h	Replace pg_shadow and pg_group by new role-capable catalogs pg_authid	21 years ago
params.h	Tag appropriate files for rc3	21 years ago
parsenodes.h	Bring syntax of role-related commands into SQL compliance. To avoid	21 years ago
pg_list.h	Tag appropriate files for rc3	21 years ago
plannodes.h	Remove support for OR'd indexscans internal to a single IndexScan plan	21 years ago
primnodes.h	Add Oracle-compatible GREATEST and LEAST functions. Pavel Stehule	21 years ago
print.h	Tag appropriate files for rc3	21 years ago
readfuncs.h	Tag appropriate files for rc3	21 years ago
relation.h	Teach planner about some cases where a restriction clause can be	21 years ago
tidbitmap.h	Initial implementation of lossy-tuple-bitmap data structures.	21 years ago
value.h	Some more missed copyright notices. Many of these look like they	21 years ago