merge show-events into 6.0.0

解决show events报语法错误的问题

Created-by: dodders
Commit-by: laishenghao
Merged-by: opengauss_bot
Description: 【标题】解决show events报语法错误的问题

【实现内容】:解决show events报语法错误的问题

【根因分析】: B库下interval为关键字，导致语法解析错误

【实现方案】:在B库下对interval增加反引号。

【关联需求或issue】:https://gitcode.com/opengauss/openGauss-server/issues/7008

【开发自验报告】:
1. 请附上自验结果(内容或者截图)
![e98be8762beba0a997bd2b354410730.png](https://raw.gitcode.com/user-images/assets/5089689/97424aa0-3fff-4da3-9b4d-d77b4e6338df/e98be8762beba0a997bd2b354410730.png 'e98be8762beba0a997bd2b354410730.png')
2. 是否可以添加fastcheck测试用例，如是，请补充fastcheck用例
是
3. 是否涉及资料修改，如是，在docs仓库补充资料
否
4. 是否考虑升级场景(系统表修改、日志持久化以及修改执行态数据格式)
不涉及
5. 是否考虑在线扩容等扩展场景
不涉及
6. 是否考虑异常场景/并发场景/前向兼容/性能场景
解决异常报错
7. 是否对其他模块产生影响
否

【其他说明】:NA

See merge request: opengauss/openGauss-server!7894

src/gausskernel/optimizer/commands/eventcmds.cpp

@@ -942,8 +942,14 @@ StmtResult *SearchEventInfo(ShowEventStmt *stmt)
     StringInfoData buf;
     initStringInfo(&buf);
     appendStringInfo(&buf, "SELECT ");
-    appendStringInfo(&buf,
-                     "job_name,nspname,log_user,priv_user,job_status,start_date,interval,end_date,enable,failure_msg ");
+    char* intervalColName;
+    if (u_sess->attr.attr_sql.dolphin) {
+        intervalColName = "`interval`";
+    } else {
+        intervalColName = "interval";
+    }
+    appendStringInfo(&buf, "job_name,nspname,log_user,priv_user,job_status,start_date,%s,end_date,enable,failure_msg ",
+                     intervalColName);
     appendStringInfo(&buf, "FROM PG_JOB ");
 
     /* Concatenate where clause */

src/test/regress/expected/show_events.out

@@ -0,0 +1,56 @@
+create database event_db dbcompatibility 'B';
+\c event_db
+create schema event_s;
+set current_schema = event_s;
+set dolphin.b_compatibility to on;
+show events;
+ job_name | schema_name | log_user | priv_user | job_status | start_date | interval | end_date | enable | failure_msg 
+----------+-------------+----------+-----------+------------+------------+----------+----------+--------+-------------
+(0 rows)
+
+create user event_a sysadmin password 'event_123';
+create definer=event_a event e1 on schedule at '2023-01-16 21:05:40' disable do select 1;
+select  job_name, nspname from pg_job where dbname='event_b';
+ job_name | nspname 
+----------+---------
+(0 rows)
+
+show events in a;
+ job_name | schema_name | log_user | priv_user | job_status | start_date | interval | end_date | enable | failure_msg 
+----------+-------------+----------+-----------+------------+------------+----------+----------+--------+-------------
+(0 rows)
+
+show events from a;
+ job_name | schema_name | log_user | priv_user | job_status | start_date | interval | end_date | enable | failure_msg 
+----------+-------------+----------+-----------+------------+------------+----------+----------+--------+-------------
+(0 rows)
+
+show events like 'e';
+ job_name | schema_name | log_user | priv_user | job_status | start_date | interval | end_date | enable | failure_msg 
+----------+-------------+----------+-----------+------------+------------+----------+----------+--------+-------------
+(0 rows)
+
+show events like 'e%';
+--?.*
+--?.*
+--?.*
+(1 row)
+
+show events like 'e_';
+--?.*
+--?.*
+--?.*
+(1 row)
+
+show events where job_name='e1';
+--?.*
+--?.*
+--?.*
+(1 row)
+
+drop event if exists e1;
+drop user if exists event_a;
+reset current_schema;
+drop schema event_s;
+\c postgres
+drop database if exists event_db;

src/test/regress/parallel_schedule0

@@ -1105,7 +1105,7 @@ test: optimizing_index_scan_ustore
 test: row_count_function
 
 # test for inherit table
-test: inherits01
+test: inherits01 show_events
 
 # show_warnings
 test: show_warnings prevent_table_in_sys_schema create_tbl_init_td_check

src/test/regress/parallel_schedule0A

@@ -417,7 +417,7 @@ test: partiton_pathkey_col_plan partiton_pathkey_col_randomexec partiton_pathkey
 #test: create_function_1
 test: create_table create_table_2 create_table_3
 test: temp__4 obsscaninfo
-test: create_seg_table
+test: create_seg_table show_events
 #test: copy#
 
 

src/test/regress/sql/show_events.sql

@@ -0,0 +1,25 @@
+create database event_db dbcompatibility 'B';
+\c event_db
+create schema event_s;
+set current_schema = event_s;
+set dolphin.b_compatibility to on;
+
+show events;
+
+create user event_a sysadmin password 'event_123';
+create definer=event_a event e1 on schedule at '2023-01-16 21:05:40' disable do select 1;
+
+select  job_name, nspname from pg_job where dbname='event_b';
+show events in a;
+show events from a;
+show events like 'e';
+show events like 'e%';
+show events like 'e_';
+show events where job_name='e1';
+drop event if exists e1;
+drop user if exists event_a;
+
+reset current_schema;
+drop schema event_s;
+\c postgres
+drop database if exists event_db;