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Diffstat (limited to 'src/backend/executor/nodeMergejoin.c')
| -rw-r--r-- | src/backend/executor/nodeMergejoin.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/backend/executor/nodeMergejoin.c b/src/backend/executor/nodeMergejoin.c index 2a5a7acf945..15742c574ad 100644 --- a/src/backend/executor/nodeMergejoin.c +++ b/src/backend/executor/nodeMergejoin.c @@ -229,6 +229,14 @@ MJExamineQuals(List *mergeclauses, elog(ERROR, "cannot merge using non-equality operator %u", qual->opno); + /* + * sortsupport routine must know if abbreviation optimization is + * applicable in principle. It is never applicable for merge joins + * because there is no convenient opportunity to convert to alternative + * representation. + */ + clause->ssup.abbreviate = false; + /* And get the matching support or comparison function */ Assert(clause->ssup.comparator == NULL); sortfunc = get_opfamily_proc(opfamily, |