CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl@svr1.postgresql.org 04/01/03 23:51:52
Modified files:
src/backend/nodes: copyfuncs.c outfuncs.c
src/backend/optimizer/path: clausesel.c costsize.c indxpath.c
src/backend/optimizer/plan: initsplan.c
src/backend/optimizer/prep: prepunion.c
src/backend/optimizer/util: clauses.c restrictinfo.c
src/include/nodes: relation.h
src/include/optimizer: clauses.h cost.h
Log message:
Merge restrictlist_selectivity into clauselist_selectivity by
teaching the latter to accept either RestrictInfo nodes or bare
clause expressions; and cache the selectivity result in the RestrictInfo
node when possible. This extends the caching behavior of approx_selectivity
to many more contexts, and should reduce duplicate selectivity
calculations.