diff --git a/.gitee/ISSUE_TEMPLATE.en.md b/.gitee/ISSUE_TEMPLATE.en.md
new file mode 100644
index 0000000000000000000000000000000000000000..4ad4df52860727cd622b8e3b45bd0981e444a762
--- /dev/null
+++ b/.gitee/ISSUE_TEMPLATE.en.md
@@ -0,0 +1,21 @@
+**Is this a BUG REPORT or FEATURE REQUEST?**:
+
+> Uncomment only one, leave it on its own line: 
+>
+> - bug
+>
+> - feature
+
+
+**What happened**:
+
+**What you expected to happen**:
+
+**How to reproduce it (as minimally and precisely as possible)**:
+
+**Anything else we need to know?**:
+
+**Environment**:
+- Version:
+- OS (e.g. from /etc/os-release):
+- Others:
diff --git a/.gitee/ISSUE_TEMPLATE.zh-CN.md b/.gitee/ISSUE_TEMPLATE.zh-CN.md
new file mode 100644
index 0000000000000000000000000000000000000000..bdb654393767bef656c36a6e87aaa6821605cee5
--- /dev/null
+++ b/.gitee/ISSUE_TEMPLATE.zh-CN.md
@@ -0,0 +1,21 @@
+**这是一个bug还是新特性?**:
+
+> 以下两者二选一，请保留一项: 
+>
+> - bug
+>
+> - 特性
+
+
+**发生结果**:
+
+**期望结果**:
+
+**如何重现（尽量详细）**:
+
+**补充说明?**:
+
+**环境情况**:
+- 软件版本:
+- 操作系统版本 (e.g. from /etc/os-release):
+- 其它:
diff --git a/.gitee/PULL_REQUEST_TEMPLATE.en.md b/.gitee/PULL_REQUEST_TEMPLATE.en.md
new file mode 100644
index 0000000000000000000000000000000000000000..211cb09ff26205aa0201eaf86448be39892c58f0
--- /dev/null
+++ b/.gitee/PULL_REQUEST_TEMPLATE.en.md
@@ -0,0 +1,22 @@
+<!--
+PR Title Format: "type(module|feature): brief description". The description of module or feature is optional.
+Where type can be one of the following:
+    feat: new features;				fix: bug fixes;						perf: performance improvements;
+	refactor: code refactoring;		revert: reverting changes;			test: adding or updating tests;
+	docs: documentation changes;	style: code style improvements;		sync: synchronization tasks
+	chore: maintenance tasks;
+Example: "docs(template): add templates for PR and Issue"
+Note: Delete This Section When Committing Code.
+-->
+
+**[Background]**
+Describe the background of this PR (why we need it).
+
+**[Root Cause]**
+Analyze the root cause of the problem or requirement(optional).
+
+**[Changes Made]**
+Describe the solution for this PR.
+
+**[Test Result]**
+Developer self validation results.
diff --git a/.gitee/PULL_REQUEST_TEMPLATE.zh-CN.md b/.gitee/PULL_REQUEST_TEMPLATE.zh-CN.md
new file mode 100644
index 0000000000000000000000000000000000000000..b16b119bf7e9680f9d109a73cb3b1c4c51c3bf68
--- /dev/null
+++ b/.gitee/PULL_REQUEST_TEMPLATE.zh-CN.md
@@ -0,0 +1,21 @@
+<!--
+PR标题格式: "type(module|feature): PR修改的简短描述"， 其中module(模块名)或者feature(特性名)的描述是可选项
+其中type可以是如下之一:
+    feat: 新特性；		fix: bug修复；					perf: 性能优化；			refactor: 代码重构；
+	revert: 代码回退；	test: 用于新增或更新测试用例；		docs: 文档或注释修改；		style: 代码格式修改；
+    sync: 代码同步任务；	chore: 不容易归类的修改；
+例子: "docs(template): 增加PR和Issue的模板"
+注意: 提交代码时删除此部分。
+-->
+
+**[Background]**
+描述该PR的修改背景。
+
+**[Root Cause]**
+根因分析。
+
+**[Changes Made]**
+描述该PR的修改方案。
+
+**[Test Result]**
+开发人员自验证结果。
\ No newline at end of file
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 37e0a3d14f70f2aeb5cd25b23a922fd6bd6f27a1..df91e4d19addc489e926bb13217a8002016c1d11 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];