diff --git a/mysql-test/suite/ctc/r/ctc_ddl_func_index.result b/mysql-test/suite/ctc/r/ctc_ddl_func_index.result
index 5c551745dbb573f9bdea5c9e70e2935c1b631f3a..d8e34ff627166fa30b46637369164ec6b8ad43fb 100644
--- a/mysql-test/suite/ctc/r/ctc_ddl_func_index.result
+++ b/mysql-test/suite/ctc/r/ctc_ddl_func_index.result
@@ -95,4 +95,8 @@ create table t5 (c1 int, c2 int, c3 varchar(10), index func_idx_1 ((abs(c1))));
 drop table t5;
 create table t5 (c1 int, c2 int, c3 varchar(10), index func_idx_1 ((c1 + c2)));
 ERROR HY000: Cantian does not support function indexes with multiple columns of arguments.
+create table t6 (c1 int, c2 int);
+create index index_func_idx_1 on t6 ((if(c1 = 1, 1, 3)));
+ERROR HY000: Function if is not indexable
+drop table t6;
 drop database db1;
diff --git a/mysql-test/suite/ctc/t/ctc_ddl_func_index.test b/mysql-test/suite/ctc/t/ctc_ddl_func_index.test
index 0dedf2e8033f5adf68018127a478359c66805ffb..879c0c2cafaf0feeda52760154cc8d55b15faee2 100644
--- a/mysql-test/suite/ctc/t/ctc_ddl_func_index.test
+++ b/mysql-test/suite/ctc/t/ctc_ddl_func_index.test
@@ -51,5 +51,11 @@ drop table t5;
 --error ER_DISALLOWED_OPERATION
 create table t5 (c1 int, c2 int, c3 varchar(10), index func_idx_1 ((c1 + c2)));
 
+# 创建包含条件表达式函数索引异常场景
+create table t6 (c1 int, c2 int);
+--error ER_DISALLOWED_OPERATION
+create index index_func_idx_1 on t6 ((if(c1 = 1, 1, 3)));
+
+drop table t6;
 
 drop database db1;
diff --git a/storage/ctc/ctc_ddl_util.cc b/storage/ctc/ctc_ddl_util.cc
index ef26c4645864c3f878547ae0d35c2188c0379852..a13e1a3f6be868329198ba9cae2895a45c06cc5a 100644
--- a/storage/ctc/ctc_ddl_util.cc
+++ b/storage/ctc/ctc_ddl_util.cc
@@ -89,6 +89,9 @@ bool check_data_file_name(const char *data_file_name) {
 }
 
 Field *ctc_get_field_by_name(TABLE *form, const char *name) {
+  if (name == nullptr) {
+    return nullptr;
+  }
   for (uint32_t i = 0; i < form->s->fields; i++) {
     if (strcasecmp(form->field[i]->field_name, name) == 0) {
       return form->field[i];