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Allow parallelism in COPY (query) TO ...;

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Previously this was not allowed, as copy.c didn't set the
CURSOR_OPT_PARALLEL_OK flag when planning the query. Set it.

While the lack of parallel query for COPY isn't strictly speaking a
bug, it does prevent parallelism from being used in a facility
commonly used to run long running queries. Thus backpatch to 9.6.

Author: Andres Freund
Discussion: https://postgr.es/m/20170531231958.ihanapplorptykzm@alap3.anarazel.de
Backpatch: 9.6, where parallelism was introduced.
This commit is contained in:
Andres Freund
2017-06-02 19:05:57 -07:00
parent 8d9b4fe01b
commit 8a7cd781ee
1 changed files with 1 additions and 1 deletions
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src/backend/commands/copy.c
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@ -1491,7 +1491,7 @@ BeginCopy(bool is_from,
} }
/* plan the query */ /* plan the query */
plan = pg_plan_query(query, 0, NULL); plan = pg_plan_query(query, CURSOR_OPT_PARALLEL_OK, NULL);
/* /*
* With row level security and a user using "COPY relation TO", we * With row level security and a user using "COPY relation TO", we