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| author | David Rowley <drowley@postgresql.org> | 2021-11-24 23:29:56 +1300 |
|---|---|---|
| committer | David Rowley <drowley@postgresql.org> | 2021-11-24 23:29:56 +1300 |
| commit | c2dc7b9e15039ce90c0a631ff291feb81d2c8051 (patch) | |
| tree | 07729c689c4f0a51b2dccd4d679edee283c194a6 /src/include/nodes/execnodes.h | |
| parent | 0e681fa458750b08a5c7885820320fb85cd9ddf1 (diff) | |
Flush Memoize cache when non-key parameters change, take 2
It's possible that a subplan below a Memoize node contains a parameter
from above the Memoize node. If this parameter changes then cache entries
may become out-dated due to the new parameter value.
Previously Memoize was mistakenly not aware of this. We fix this here by
flushing the cache whenever a parameter that's not part of the cache
key changes.
Bug: #17213
Reported by: Elvis Pranskevichus
Author: David Rowley
Discussion: https://postgr.es/m/17213-988ed34b225a2862@postgresql.org
Backpatch-through: 14, where Memoize was added
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 8341c2b8a16..14246e72a72 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -2112,6 +2112,8 @@ typedef struct MemoizeState * by bit, false when using hash equality ops */ MemoizeInstrumentation stats; /* execution statistics */ SharedMemoizeInfo *shared_info; /* statistics for parallel workers */ + Bitmapset *keyparamids; /* Param->paramids of expressions belonging to + * param_exprs */ } MemoizeState; /* ---------------- |