Add CheckTableNotInUse calls in DROP TABLE and DROP INDEX.
Recent releases had a check on rel->rd_refcnt in heap_drop_with_catalog,
but failed to cover the possibility of pending trigger events at DROP time.
(Before 8.4 we didn't even check the refcnt.) When the trigger events were
eventually fired, you'd get "could not open relation with OID nnn" errors,
as in recent report from strk. Better to throw a suitable error when the
DROP is attempted.
Also add a similar check in DROP INDEX.
Back-patch to all supported branches.
Branch
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REL8_2_STABLE
Details
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http://git.postgresql.org/pg/commitdiff/69bef7ff79eb33e8a355e79e7fbb5338d1557775
Modified Files
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src/backend/catalog/heap.c | 7 +++++++
src/backend/catalog/index.c | 6 ++++++
2 files changed, 13 insertions(+), 0 deletions(-)