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| author | Robert Haas <rhaas@postgresql.org> | 2015-04-30 15:02:14 -0400 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2015-04-30 15:02:14 -0400 |
| commit | 924bcf4f16d54c55310b28f77686608684734f42 (patch) | |
| tree | 79f35bf679c6a68dbe725cc90248a553f2b9e019 /src/backend/executor/functions.c | |
| parent | 669c7d20e6374850593cb430d332e11a3992bbcf (diff) | |
| download | postgresql-924bcf4f16d54c55310b28f77686608684734f42.tar.gz postgresql-924bcf4f16d54c55310b28f77686608684734f42.zip | |
Create an infrastructure for parallel computation in PostgreSQL.
This does four basic things. First, it provides convenience routines
to coordinate the startup and shutdown of parallel workers. Second,
it synchronizes various pieces of state (e.g. GUCs, combo CID
mappings, transaction snapshot) from the parallel group leader to the
worker processes. Third, it prohibits various operations that would
result in unsafe changes to that state while parallelism is active.
Finally, it propagates events that would result in an ErrorResponse,
NoticeResponse, or NotifyResponse message being sent to the client
from the parallel workers back to the master, from which they can then
be sent on to the client.
Robert Haas, Amit Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke.
Suggestions and review from Andres Freund, Heikki Linnakangas, Noah
Misch, Simon Riggs, Euler Taveira, and Jim Nasby.
Diffstat (limited to 'src/backend/executor/functions.c')
| -rw-r--r-- | src/backend/executor/functions.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/executor/functions.c b/src/backend/executor/functions.c index 6c3eff7c584..ce49c471d49 100644 --- a/src/backend/executor/functions.c +++ b/src/backend/executor/functions.c @@ -513,6 +513,9 @@ init_execution_state(List *queryTree_list, errmsg("%s is not allowed in a non-volatile function", CreateCommandTag(stmt)))); + if (IsInParallelMode() && !CommandIsReadOnly(stmt)) + PreventCommandIfParallelMode(CreateCommandTag(stmt)); + /* OK, build the execution_state for this query */ newes = (execution_state *) palloc(sizeof(execution_state)); if (preves) |