Horton

Split QTW_EXAMINE_RTES flag into QTW_EXAMINE_RTES_BEFORE/_AFTER.

Tom Lane <tgl@sss.pgh.pa.us>

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Commit: 18c0da88a5d9da566c3bfac444366b73bd0b57da
Author: Tom Lane <tgl@sss.pgh.pa.us>
Date: 2019-01-25T22:09:45Z
Releases: 12.0 
Split QTW_EXAMINE_RTES flag into QTW_EXAMINE_RTES_BEFORE/_AFTER.

This change allows callers of query_tree_walker() to choose whether
to visit an RTE before or after visiting the contents of the RTE
(i.e., prefix or postfix tree order).  All existing users of
QTW_EXAMINE_RTES want the QTW_EXAMINE_RTES_BEFORE behavior, but
an upcoming patch will want QTW_EXAMINE_RTES_AFTER, and it seems
like a potentially useful change on its own.

Andreas Karlsson (extracted from CTE inlining patch)

Discussion: https://postgr.es/m/8810.1542402910@sss.pgh.pa.us

Files

PathChange+/−
src/backend/nodes/nodeFuncs.c modified +11 −3
src/backend/optimizer/plan/setrefs.c modified +2 −2
src/backend/rewrite/rewriteManip.c modified +3 −3
src/include/nodes/nodeFuncs.h modified +5 −2

Discussion