diff options
Diffstat (limited to 'src/backend/parser/parse_clause.c')
| -rw-r--r-- | src/backend/parser/parse_clause.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/backend/parser/parse_clause.c b/src/backend/parser/parse_clause.c index c2b5474f5f7..e01c0734d17 100644 --- a/src/backend/parser/parse_clause.c +++ b/src/backend/parser/parse_clause.c @@ -153,7 +153,7 @@ transformFromClause(ParseState *pstate, List *frmList) /* * setTargetTable - * Add the target relation of INSERT/UPDATE/DELETE to the range table, + * Add the target relation of INSERT/UPDATE/DELETE/MERGE to the range table, * and make the special links to it in the ParseState. * * We also open the target relation and acquire a write lock on it. @@ -163,7 +163,9 @@ transformFromClause(ParseState *pstate, List *frmList) * * If alsoSource is true, add the target to the query's joinlist and * namespace. For INSERT, we don't want the target to be joined to; - * it's a destination of tuples, not a source. For UPDATE/DELETE, + * it's a destination of tuples, not a source. MERGE is actually + * both, but we'll add it separately to joinlist and namespace, so + * doing nothing (like INSERT) is correct here. For UPDATE/DELETE, * we do need to scan or join the target. (NOTE: we do not bother * to check for namespace conflict; we assume that the namespace was * initially empty in these cases.) |