加此参数可以增加 explain 中 verbose 信息输出，获得更详细的执行计划信息。默认 off ，关闭状态。
示例说明
假如实例中有 database a_all，该 database 的 public 模式下有10张表格，分别为：student_info_b0、student_info_b1、student_info_b2、student_info_b3、student_info_b4、student_info_b5、student_info_b6、student_info_b7、student_info_b8、student_info_b9
当前云数据库 PostgreSQL 实例已经开启了 auto_explain 插件。其参数值如下：
a_all=> show auto_explain.log_min_duration;
auto_explain.log_min_duration
-------------------------------
800ms
(1 row)
a_all=> show auto_explain.log_analyze;
auto_explain.log_analyze
--------------------------
on
(1 row)
a_all=> show auto_explain.log_verbose;
auto_explain.log_verbose
--------------------------
on
(1 row)
a_all=> show auto_explain.log_timing;
auto_explain.log_timing
-------------------------
on
(1 row)
执行如下语句：
SELECT user_id, COUNT(*) OVER (PARTITION BY user_id) as countFROM ( SELECT user_id FROM student_info_b0 UNION ALL SELECT user_id FROM student_info_b1 UNION ALL SELECT user_id FROM student_info_b2 UNION ALL SELECT user_id FROM student_info_b3 UNION ALL SELECT user_id FROM student_info_b4 UNION ALL SELECT user_id FROM student_info_b5 UNION ALL SELECT user_id FROM student_info_b6 UNION ALL SELECT user_id FROM student_info_b7 UNION ALL SELECT user_id FROM student_info_b8 UNION ALL SELECT user_id FROM student_info_b9) AS all_students;
