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Diffstat (limited to 'src/backend/optimizer/util/tlist.c')
| -rw-r--r-- | src/backend/optimizer/util/tlist.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/backend/optimizer/util/tlist.c b/src/backend/optimizer/util/tlist.c index fe9a9d7d896..784a1af82df 100644 --- a/src/backend/optimizer/util/tlist.c +++ b/src/backend/optimizer/util/tlist.c @@ -22,6 +22,17 @@ /* + * Test if an expression node represents a SRF call. Beware multiple eval! + * + * Please note that this is only meant for use in split_pathtarget_at_srfs(); + * if you use it anywhere else, your code is almost certainly wrong for SRFs + * nested within expressions. Use expression_returns_set() instead. + */ +#define IS_SRF_CALL(node) \ + ((IsA(node, FuncExpr) && ((FuncExpr *) (node))->funcretset) || \ + (IsA(node, OpExpr) && ((OpExpr *) (node))->opretset)) + +/* * Data structures for split_pathtarget_at_srfs(). To preserve the identity * of sortgroupref items even if they are textually equal(), what we track is * not just bare expressions but expressions plus their sortgroupref indexes. |