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| author | Robert Haas <rhaas@postgresql.org> | 2017-03-07 10:33:29 -0500 |
|---|---|---|
| committer | Robert Haas <rhaas@postgresql.org> | 2017-03-07 10:33:29 -0500 |
| commit | a71f10189dc10a2fe422158a2c9409e0f77c6b9e (patch) | |
| tree | 7ac8d794996d36feca0816ad43a164db0f2f015f /src/backend/access/gist/gistvalidate.c | |
| parent | 655393a022bd653e2b48dbf20b69236981e35195 (diff) | |
| download | postgresql-a71f10189dc10a2fe422158a2c9409e0f77c6b9e.tar.gz postgresql-a71f10189dc10a2fe422158a2c9409e0f77c6b9e.zip | |
Preparatory refactoring for parallel merge join support.
Extract the logic used by hash_inner_and_outer into a separate
function, get_cheapest_parallel_safe_total_inner, so that it can
also be used to plan parallel merge joins.
Also, add a require_parallel_safe argument to the existing function
get_cheapest_path_for_pathkeys, because parallel merge join needs
to find the cheapest path for a given set of pathkeys that is
parallel-safe, not just the cheapest one overall.
Patch by me, reviewed by Dilip Kumar.
Discussion: http://postgr.es/m/CA+TgmoYOv+dFK0MWW6366dFj_xTnohQfoBDrHyB7d1oZhrgPjA@mail.gmail.com
Diffstat (limited to 'src/backend/access/gist/gistvalidate.c')
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