Обсуждение: pgsql: Further cleanup of indxpath logic related to IndexOptInfo.opfami

Further cleanup of indxpath logic related to IndexOptInfo.opfamily array.

We no longer need the terminating zero entry in opfamily[], so get rid of
it.  Also replace assorted ad-hoc looping logic with simple for and foreach
constructs.  This code is now noticeably more readable than it was an hour
ago; credit to Robert for seeing that it could be simplified.

Branch
------
master

Details
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http://git.postgresql.org/gitweb?p=postgresql.git;a=commitdiff;h=89a368418c56125f79f46a81229e824d519f9718

Modified Files
--------------
src/backend/optimizer/path/indxpath.c |   53 ++++++++++++++------------------
src/backend/optimizer/util/plancat.c  |   10 +++---
src/include/nodes/relation.h          |    3 --
3 files changed, 28 insertions(+), 38 deletions(-)