diff options
Diffstat (limited to 'src/backend/nodes/nodeFuncs.c')
| -rw-r--r-- | src/backend/nodes/nodeFuncs.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c index 19b65f681d1..a806d51edcd 100644 --- a/src/backend/nodes/nodeFuncs.c +++ b/src/backend/nodes/nodeFuncs.c @@ -2255,7 +2255,7 @@ expression_tree_walker(Node *node, * Some callers want to suppress visitation of certain items in the sub-Query, * typically because they need to process them specially, or don't actually * want to recurse into subqueries. This is supported by the flags argument, - * which is the bitwise OR of flag values to suppress visitation of + * which is the bitwise OR of flag values to add or suppress visitation of * indicated items. (More flag bits may be added as needed.) */ bool @@ -2314,8 +2314,12 @@ range_table_walker(List *rtable, { RangeTblEntry *rte = (RangeTblEntry *) lfirst(rt); - /* For historical reasons, visiting RTEs is not the default */ - if (flags & QTW_EXAMINE_RTES) + /* + * Walkers might need to examine the RTE node itself either before or + * after visiting its contents (or, conceivably, both). Note that if + * you specify neither flag, the walker won't visit the RTE at all. + */ + if (flags & QTW_EXAMINE_RTES_BEFORE) if (walker(rte, context)) return true; @@ -2355,6 +2359,10 @@ range_table_walker(List *rtable, if (walker(rte->securityQuals, context)) return true; + + if (flags & QTW_EXAMINE_RTES_AFTER) + if (walker(rte, context)) + return true; } return false; } |