diff --git a/src/backend/parser/parse_clause.c b/src/backend/parser/parse_clause.c
index 967eea44..2f12ed36 100644
--- a/src/backend/parser/parse_clause.c
+++ b/src/backend/parser/parse_clause.c
@@ -1003,6 +1003,12 @@ transformRangeGraphTable(ParseState *pstate, RangeGraphTable *rgt)
 		columns = lappend(columns, te);
 	}
 
+	/*
+	 * Assign collations to column expressions, just as we do for the WHERE
+	 * clause in transformGraphPattern().
+	 */
+	assign_expr_collations(pstate, (Node *) columns);
+
 	table_close(rel, NoLock);
 
 	pstate->p_graph_table_pstate = NULL;
diff --git a/src/test/regress/expected/graph_table.out b/src/test/regress/expected/graph_table.out
index b579e3df..0a84c7eb 100644
--- a/src/test/regress/expected/graph_table.out
+++ b/src/test/regress/expected/graph_table.out
@@ -679,6 +679,23 @@ SELECT * FROM GRAPH_TABLE (g1 MATCH (a)-[b]->(a)-[b]->(a) COLUMNS (a.vname AS se
  v33  | e331
 (1 row)
 
+-- test collation assignment for COLUMNS expressions
+SELECT * FROM GRAPH_TABLE (g1 MATCH (src)->(dest) COLUMNS (upper(src.vname) AS u)) ORDER BY u;
+  u  
+-----
+ V11
+ V11
+ V11
+ V12
+ V13
+ V21
+ V22
+ V23
+ V32
+ V33
+ V33
+(11 rows)
+
 -- property graph with some of the elements, labels and properties same as the
 -- previous one. Test whether components from the specified property graph are
 -- used. Also test explicit collation specification in property.
diff --git a/src/test/regress/sql/graph_table.sql b/src/test/regress/sql/graph_table.sql
index 4ff98817..ffb7cbe6 100644
--- a/src/test/regress/sql/graph_table.sql
+++ b/src/test/regress/sql/graph_table.sql
@@ -400,6 +400,8 @@ SELECT * FROM GRAPH_TABLE (g1 MATCH (a)-[b]->(a)-[b]->(a) COLUMNS (a.vname AS se
 SELECT * FROM GRAPH_TABLE (g1 MATCH (a)-[b IS el2 WHERE b.ename > 'E331' COLLATE "C"]->(a)-[b]->(a) COLUMNS (a.vname AS self, b.ename AS loop_name));
 SELECT * FROM GRAPH_TABLE (g1 MATCH (a)-[b]->(a)-[b]->(a) WHERE b.ename > 'E331' COLLATE "C" COLUMNS (a.vname AS self, b.ename AS loop_name));
 SELECT * FROM GRAPH_TABLE (g1 MATCH (a)-[b]->(a)-[b]->(a) COLUMNS (a.vname AS self, b.ename AS loop_name)) WHERE loop_name > 'E331' COLLATE "C";
+-- test collation assignment for COLUMNS expressions
+SELECT * FROM GRAPH_TABLE (g1 MATCH (src)->(dest) COLUMNS (upper(src.vname) AS u)) ORDER BY u;
 
 -- property graph with some of the elements, labels and properties same as the
 -- previous one. Test whether components from the specified property graph are