diff options
Diffstat (limited to 'src/backend/executor/nodeMemoize.c')
| -rw-r--r-- | src/backend/executor/nodeMemoize.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/backend/executor/nodeMemoize.c b/src/backend/executor/nodeMemoize.c index 262f797..3c54ca5 100644 --- a/src/backend/executor/nodeMemoize.c +++ b/src/backend/executor/nodeMemoize.c @@ -13,7 +13,7 @@ * Memoize nodes are intended to sit above parameterized nodes in the plan * tree in order to cache results from them. The intention here is that a * repeat scan with a parameter value that has already been seen by the node - * can fetch tuples from the cache rather than having to re-scan the outer + * can fetch tuples from the cache rather than having to re-scan the inner * node all over again. The query planner may choose to make use of one of * these when it thinks rescans for previously seen values are likely enough * to warrant adding the additional node. @@ -207,7 +207,6 @@ MemoizeHash_hash(struct memoize_hash *tb, const MemoizeKey *key) } } - ResetExprContext(econtext); MemoryContextSwitchTo(oldcontext); return murmurhash32(hashkey); } @@ -265,7 +264,6 @@ MemoizeHash_equal(struct memoize_hash *tb, const MemoizeKey *key1, } } - ResetExprContext(econtext); MemoryContextSwitchTo(oldcontext); return match; } @@ -273,7 +271,7 @@ MemoizeHash_equal(struct memoize_hash *tb, const MemoizeKey *key1, { econtext->ecxt_innertuple = tslot; econtext->ecxt_outertuple = pslot; - return ExecQualAndReset(mstate->cache_eq_expr, econtext); + return ExecQual(mstate->cache_eq_expr, econtext); } } @@ -694,9 +692,18 @@ static TupleTableSlot * ExecMemoize(PlanState *pstate) { MemoizeState *node = castNode(MemoizeState, pstate); + ExprContext *econtext = node->ss.ps.ps_ExprContext; PlanState *outerNode; TupleTableSlot *slot; + CHECK_FOR_INTERRUPTS(); + + /* + * Reset per-tuple memory context to free any expression evaluation + * storage allocated in the previous tuple cycle. + */ + ResetExprContext(econtext); + switch (node->mstatus) { case MEMO_CACHE_LOOKUP: |