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| author | Tom Lane | 2023-04-05 20:59:00 +0000 |
|---|---|---|
| committer | Tom Lane | 2023-04-05 20:59:09 +0000 |
| commit | 16dc2703c5413534d4989e08253e8f4fcb0e2aab (patch) | |
| tree | c25f739d183d93510418b734ebd36fc3e2e9fde9 /src/backend/commands | |
| parent | dad50f677c42de207168a3f08982ba23c9fc6720 (diff) | |
Support "Right Anti Join" plan shapes.
Merge and hash joins can support antijoin with the non-nullable input
on the right, using very simple combinations of their existing logic
for right join and anti join. This gives the planner more freedom
about how to order the join. It's particularly useful for hash join,
since we may now have the option to hash the smaller table instead
of the larger.
Richard Guo, reviewed by Ronan Dunklau and myself
Discussion: https://postgr.es/m/CAMbWs48xh9hMzXzSy3VaPzGAz+fkxXXTUbCLohX1_L8THFRm2Q@mail.gmail.com
Diffstat (limited to 'src/backend/commands')
| -rw-r--r-- | src/backend/commands/explain.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/backend/commands/explain.c b/src/backend/commands/explain.c index 7e48e9c2101..5334c503e12 100644 --- a/src/backend/commands/explain.c +++ b/src/backend/commands/explain.c @@ -1561,6 +1561,9 @@ ExplainNode(PlanState *planstate, List *ancestors, case JOIN_ANTI: jointype = "Anti"; break; + case JOIN_RIGHT_ANTI: + jointype = "Right Anti"; + break; default: jointype = "???"; break; |