Thread: pgsql: Fix lock level used for partition when detaching it

Fix lock level used for partition when detaching it

For probably bogus reasons, we acquire only AccessShareLock on the
partition when we try to detach it from its parent partitioned table.
This can cause ugly things to happen if another transaction is doing
any sort of DDL to the partition concurrently.

Upgrade that lock to ShareUpdateExclusiveLock, which per discussion
seems to be the minimum needed.

Reported by Robert Haas.

Discussion: https://postgr.es/m/CA+TgmoYruJQ+2qnFLtF1xQtr71pdwgfxy3Ziy-TxV28M6pEmyA@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/7b14bcc06cc56b110118fba408f4b9b72a663387

Modified Files
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src/backend/commands/tablecmds.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)