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| author | Tom Lane | 2018-10-06 19:49:37 +0000 |
|---|---|---|
| committer | Tom Lane | 2018-10-06 19:49:37 +0000 |
| commit | 29ef2b310da9892fda075ff9ee12da7f92d5da6e (patch) | |
| tree | 9505320f23af01455ff4cde46bd33702b3ddf635 /src/backend/commands/view.c | |
| parent | f2343653f5b2aecfc759f36dbb3fd2a61f36853e (diff) | |
Restore sane locking behavior during parallel query.
Commit 9a3cebeaa changed things so that parallel workers didn't obtain
any lock of their own on tables they access. That was clearly a bad
idea, but I'd mistakenly supposed that it was the intended end result
of the series of patches for simplifying the executor's lock management.
Undo that change in relation_open(), and adjust ExecOpenScanRelation()
so that it gets the correct lock if inside a parallel worker.
In passing, clean up some more obsolete comments about when locks
are acquired.
Discussion: https://postgr.es/m/468c85d9-540e-66a2-1dde-fec2b741e688@lab.ntt.co.jp
Diffstat (limited to 'src/backend/commands/view.c')
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