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authorTom Lane <tgl@sss.pgh.pa.us>2016-11-25 13:44:48 -0500
committerTom Lane <tgl@sss.pgh.pa.us>2016-11-25 13:44:48 -0500
commit6cbe84c826b51a159825e9843184c7b4a740e4ae (patch)
tree6de01057ba40f732d6731f73efd4ff4c7fd20ea1 /src/tutorial/advanced.source
parent7816d13563b74379c9db618e46883c6db5fc0680 (diff)
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Check for pending trigger events on far end when dropping an FK constraint.
When dropping a foreign key constraint with ALTER TABLE DROP CONSTRAINT, we refuse the drop if there are any pending trigger events on the named table; this ensures that we won't remove the pg_trigger row that will be consulted by those events. But we should make the same check for the referenced relation, else we might remove a due-to-be-referenced pg_trigger row for that relation too, resulting in "could not find trigger NNN" or "relation NNN has no triggers" errors at commit. Per bug #14431 from Benjie Gillam. Back-patch to all supported branches. Report: <20161124114911.6530.31200@wrigleys.postgresql.org>
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