Fix creating stats bug when CREATE TABLE LIKE (#6006)

src/backend/distributed/deparser/qualify_statistics_stmt.c

@@ -42,6 +42,12 @@ QualifyCreateStatisticsStmt(Node *node)
 		relation->schemaname = get_namespace_name(schemaOid);
 	}
 
+	if (list_length(stmt->defnames) < 1)
+	{
+		/* no name to qualify */
+		return;
+	}
+
 	RangeVar *stat = makeRangeVarFromNameList(stmt->defnames);
 
 	if (stat->schemaname == NULL)

src/test/regress/expected/pg14.out

@@ -1364,6 +1364,18 @@ SELECT count(*) FROM pg14.foreign_table;
 TRUNCATE foreign_table;
 ERROR:  truncating foreign tables that are added to metadata can only be executed on the coordinator
 \c - - - :master_port
+SET search_path TO pg14;
+-- an example with CREATE TABLE LIKE, with statistics with expressions
+CREATE TABLE ctlt1 (a text CHECK (length(a) > 2) PRIMARY KEY, b text);
+CREATE STATISTICS ctlt1_expr_stat ON (a || b) FROM ctlt1;
+CREATE TABLE ctlt_all (LIKE ctlt1 INCLUDING ALL);
+SELECT create_distributed_table('ctlt1', 'a');
+ create_distributed_table
+---------------------------------------------------------------------
+
+(1 row)
+
+CREATE TABLE ctlt_all_2 (LIKE ctlt1 INCLUDING ALL);
 -- cleanup
 set client_min_messages to error;
 drop extension postgres_fdw cascade;

src/test/regress/sql/pg14.sql

@@ -706,6 +706,13 @@ SELECT count(*) FROM pg14.foreign_table;
 -- should error out
 TRUNCATE foreign_table;
 \c - - - :master_port
+SET search_path TO pg14;
+-- an example with CREATE TABLE LIKE, with statistics with expressions
+CREATE TABLE ctlt1 (a text CHECK (length(a) > 2) PRIMARY KEY, b text);
+CREATE STATISTICS ctlt1_expr_stat ON (a || b) FROM ctlt1;
+CREATE TABLE ctlt_all (LIKE ctlt1 INCLUDING ALL);
+SELECT create_distributed_table('ctlt1', 'a');
+CREATE TABLE ctlt_all_2 (LIKE ctlt1 INCLUDING ALL);
 -- cleanup
 set client_min_messages to error;
 drop extension postgres_fdw cascade;