PostgreSQL DBA(69) - Postgres tips for the average and power user

下面是一些有用的tips:

In psql, tag your queries and use Ctrl+R

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2. [local]:5432 pg12@testdb=# select * from t1 limit 1;

3. id | c1 | c2

4. ----+----+----

5. 4 | 4 | 4

6. (1 row)

7. Time: 1.872 ms

8. [local]:5432 pg12@testdb=# select * from test limit 1;

9. ERROR: relation "test" does not exist

10. LINE 1: select * from test limit 1;

11. ^

12. Time: 0.996 ms

13. [local]:5432 pg12@testdb=# create table test(id int);

14. CREATE TABLE

15. Time: 6.019 ms

16. [local]:5432 pg12@testdb=# insert into test values(1);

17. INSERT 0 1

18. Time: 2.310 ms

19. [local]:5432 pg12@testdb=# insert into test values(2);

20. INSERT 0 1

21. Time: 2.409 ms

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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.

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2. (reverse-i-search)`':

3. (reverse-i-search)`t1': select * from t1 limit 1;

4.  

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

郑州妇科医院哪家好:http://jbk.39.net/yiyuanzaixian/sysdfkyy/

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2. [local]:5432 pg12@testdb=# SELECT pg_backend_pid();

3. pg_backend_pid

4. ----------------

5. 1538

6. (1 row)

7. ...

8. (gdb) b errfinish

9. Breakpoint 1 at 0xa65517: file elog.c, line 412.

10. (gdb) c

11. Continuing.

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如出现执行错误,会在gdb中停止,利用bt可打印调用栈