下面是一些有用的tips: **In psql, tag your queries and use Ctrl+R** ``` [local]:5432 pg12@testdb=# select * from t1 limit 1; id | c1 | c2 ----+----+---- 4 | 4 | 4 (1 row) Time: 1.872 ms [local]:5432 pg12@testdb=# select * from test limit 1; ERROR: relation "test" does not exist LINE 1: select * from test limit 1; ^ Time: 0.996 ms [local]:5432 pg12@testdb=# create table test(id int); CREATE TABLE Time: 6.019 ms [local]:5432 pg12@testdb=# insert into test values(1); INSERT 0 1 Time: 2.310 ms [local]:5432 pg12@testdb=# insert into test values(2); INSERT 0 1 Time: 2.409 ms ``` 这时候使用快捷键Ctrl + R,显示搜索框,输入t1,psql检索t1相关的sql并显示在界面上. ``` (reverse-i-search)`': (reverse-i-search)`t1': select * from t1 limit 1; ``` **Better psql output** \x不够强大,可使用pspg. **Get a stack trace for an error** 使用gdb在errfinish上设置断点可跟踪错误 ``` [local]:5432 pg12@testdb=# SELECT pg_backend_pid(); pg_backend_pid ---------------- 1538 (1 row) ... (gdb) b errfinish Breakpoint 1 at 0xa65517: file elog.c, line 412. (gdb) c Continuing. ``` 如出现执行错误,会在gdb中停止,利用bt可打印调用栈 **参考资料** [Postgres tips for the average and power user](https://www.citusdata.com/blog/2019/07/17/postgres-tips-for-average-and-power-user/)