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Diffstat (limited to 'src/backend/nodes/nodeFuncs.c')
| -rw-r--r-- | src/backend/nodes/nodeFuncs.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c index 7bc5be1565f..92f32768f84 100644 --- a/src/backend/nodes/nodeFuncs.c +++ b/src/backend/nodes/nodeFuncs.c @@ -2991,8 +2991,10 @@ query_or_expression_tree_mutator(Node *node, * Unlike expression_tree_walker, there is no special rule about query * boundaries: we descend to everything that's possibly interesting. * - * Currently, the node type coverage extends to SelectStmt and everything - * that could appear under it, but not other statement types. + * Currently, the node type coverage here extends only to DML statements + * (SELECT/INSERT/UPDATE/DELETE) and nodes that can appear in them, because + * this is used mainly during analysis of CTEs, and only DML statements can + * appear in CTEs. */ bool raw_expression_tree_walker(Node *node, |