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new 30c39861961 [chore][ci] add README.md for regression-test (#26876)
30c39861961 is described below
commit 30c39861961d133bce40c6d74872f887dad21851
Author: Dongyang Li <[email protected]>
AuthorDate: Tue Nov 14 15:28:46 2023 +0800
[chore][ci] add README.md for regression-test (#26876)
* [chore][ci] add README.md for regression-test
---
regression-test/README.md | 54 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 54 insertions(+)
diff --git a/regression-test/README.md b/regression-test/README.md
new file mode 100644
index 00000000000..10ac36cbd72
--- /dev/null
+++ b/regression-test/README.md
@@ -0,0 +1,54 @@
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# 新加case注意事项
+
+1. 变量名前要写 def，否则是全局变量，并行跑的 case 的时候可能被其他 case 影响。
+
+ Problematic code:
+ ```
+ ret = ***
+ ```
+ Correct code:
+ ```
+ def ret = ***
+ ```
+2. 尽量不要在 case 中 global 的设置 session variable，或者修改集群配置，可能会影响其他 case。
+
+ Problematic code:
+ ```
+ sql """set global enable_pipeline_x_engine=true;"""
+ ```
+ Correct code:
+ ```
+ sql """set enable_pipeline_x_engine=true;"""
+ ```
+3. 如果必须要设置 global，或者要改集群配置，可以指定 case 以 nonConcurrent 的方式运行。
+
+
[示例](https://github.com/apache/doris/blob/master/regression-test/suites/query_p0/sql_functions/cast_function/test_cast_string_to_array.groovy#L18)
+5. case 中涉及时间相关的，最好固定时间，不要用类似 now() 函数这种动态值，避免过一段时间后 case 就跑不过了。
+
+ Problematic code:
+ ```
+ sql """select count(*) from table where created < now();"""
+ ```
+ Correct code:
+ ```
+ sql """select count(*) from table where created < '2023-11-13';"""
+ ```
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