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Allow treating TABLESAMPLE scans as parallel-safe.

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This was the intention all along, but an extraneous "return;" in
set_rel_consider_parallel() caused sampled rels to never be marked
consider_parallel.

Since we don't have any partial tablesample path/plan type yet, there's
no possibility of parallelizing the sample scan itself; but this fix
allows such a scan to appear below a parallel join, for example.
This commit is contained in:
Tom Lane 2016-07-03 16:55:27 -04:00
parent 0e495c5e2f
commit 2c6e6471af
1 changed files with 0 additions and 1 deletions
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src/backend/optimizer/path/allpaths.c
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@ -538,7 +538,6 @@ set_rel_consider_parallel(PlannerInfo *root, RelOptInfo *rel,
if (has_parallel_hazard((Node *) rte->tablesample->args,
false))
return;
return;
}
/*