diff --git a/src/common/backend/parser/gram.y b/src/common/backend/parser/gram.y
index 179806465..abc554592 100644
--- a/src/common/backend/parser/gram.y
+++ b/src/common/backend/parser/gram.y
@@ -31913,11 +31913,15 @@ static void CheckPartitionExpr(Node* expr, int* colCount)
 	if (expr == NULL)
 		ereport(ERROR, (errcode(ERRCODE_NULL_VALUE_NOT_ALLOWED), errmsg("The expr can't be NULL")));
 	if (expr->type == T_A_Expr) {
-		char* name = strVal(linitial(((A_Expr*)expr)->name));
+		A_Expr* a_expr = (A_Expr*)expr;
+		if (a_expr->name == NULL) {
+			ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("The expr is not supported for Partition Expr")));
+		}
+		char* name = strVal(linitial(a_expr->name));
 		if (strcmp(name, "+") != 0 && strcmp(name, "-") != 0 && strcmp(name, "*") != 0)
 			ereport(ERROR, (errcode(ERRCODE_FEATURE_NOT_SUPPORTED), errmsg("The %s operator is not supported for Partition Expr", name)));
-		CheckPartitionExpr(((A_Expr*)expr)->lexpr, colCount);
-		CheckPartitionExpr(((A_Expr*)expr)->rexpr, colCount);
+		CheckPartitionExpr(a_expr->lexpr, colCount);
+		CheckPartitionExpr(a_expr->rexpr, colCount);
 	} else if (expr->type == T_FuncCall) {
 		char* validFuncName[MAX_SUPPORTED_FUNC_FOR_PART_EXPR] = {"abs","ceiling","datediff","day","dayofmonth","dayofweek","dayofyear","extract","floor","hour",
 		"microsecond","minute","mod","month","quarter","second","time_to_sec","to_days","to_seconds","unix_timestamp","weekday","year","yearweek","date_part","div"};
diff --git a/src/test/regress/input/partition_expr_key.source b/src/test/regress/input/partition_expr_key.source
index e55b2923e..c222a4f59 100644
--- a/src/test/regress/input/partition_expr_key.source
+++ b/src/test/regress/input/partition_expr_key.source
@@ -10,6 +10,7 @@ create table testlistpart(a int, b int) partition by list(int4mul(a,2)) (partiti
 create table testhashpart(a int, b int) partition by hash(int4mul(a,2)) (partition p0 ,partition p1);
 create table testrangepart(a int, b int) partition by range(a,b*2) (partition p0 values less than(100,1000),partition p1 values less than(200,2000));
 create table testrangepart(a int, b int) partition by range(a*2,b) (partition p0 values less than(100,1000),partition p1 values less than(200,2000));
+CREATE TABLE test_error_table0 ( column62 INT ) PARTITION BY HASH ( NOT TRUE ) ;
 CREATE TABLE testrangepart(a date) PARTITION BY RANGE (a*2) INTERVAL ('1 month')
 (
 	PARTITION p0 VALUES LESS THAN ('2020-03-01'),
diff --git a/src/test/regress/output/partition_expr_key.source b/src/test/regress/output/partition_expr_key.source
index d961364a1..f56d1cf48 100644
--- a/src/test/regress/output/partition_expr_key.source
+++ b/src/test/regress/output/partition_expr_key.source
@@ -19,6 +19,8 @@ create table testrangepart(a int, b int) partition by range(a,b*2) (partition p0
 ERROR:  The multi partition expr keys are not supported.
 create table testrangepart(a int, b int) partition by range(a*2,b) (partition p0 values less than(100,1000),partition p1 values less than(200,2000));
 ERROR:  The multi partition expr keys are not supported.
+CREATE TABLE test_error_table0 ( column62 INT ) PARTITION BY HASH ( NOT TRUE ) ;
+ERROR:  The expr is not supported for Partition Expr
 CREATE TABLE testrangepart(a date) PARTITION BY RANGE (a*2) INTERVAL ('1 month')
 (
 	PARTITION p0 VALUES LESS THAN ('2020-03-01'),