diff options
| author | David Rowley | 2021-11-24 01:56:18 +0000 |
|---|---|---|
| committer | David Rowley | 2021-11-24 01:56:18 +0000 |
| commit | 1050048a315790a505465bfcceb26eaf8dbc7e2e (patch) | |
| tree | 86093353545d96b85123fb067415854eaae36549 /src/include/nodes/execnodes.h | |
| parent | e502150f7d0be41e3c8784be007fa871a32d8a7f (diff) | |
Flush Memoize cache when non-key parameters change
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/[email protected]
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 d96ace32e43..ddc35293326 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -2113,6 +2113,8 @@ 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; /* ---------------- |