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-rw-r--r--src/backend/parser/parse_collate.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/backend/parser/parse_collate.c b/src/backend/parser/parse_collate.c
index 6c793b72ec7..7582faabb37 100644
--- a/src/backend/parser/parse_collate.c
+++ b/src/backend/parser/parse_collate.c
@@ -485,6 +485,7 @@ assign_collations_walker(Node *node, assign_collations_context *context)
case T_FromExpr:
case T_OnConflictExpr:
case T_SortGroupClause:
+ case T_MergeAction:
(void) expression_tree_walker(node,
assign_collations_walker,
(void *) &loccontext);