PostgreSQL中怎么在pg_locks和pg_stat_activity两张基表基础上创建的视图

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显示阻塞信息的视图:

CREATE OR REPLACE VIEW vw_lockinfoASSELECT blocked_locks.pid     AS blocked_pid,         blocked_activity.usename  AS blocked_user,         blocking_locks.pid     AS blocking_pid,         blocking_activity.usename AS blocking_user,         blocked_activity.query    AS blocked_statement,         blocking_activity.query   AS current_statement_in_blocking_process   FROM  pg_catalog.pg_locks         blocked_locks    JOIN pg_catalog.pg_stat_activity blocked_activity  ON blocked_activity.pid = blocked_locks.pid    JOIN pg_catalog.pg_locks         blocking_locks         ON blocking_locks.locktype = blocked_locks.locktype        AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE        AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation        AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page        AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple        AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid        AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid        AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid        AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid        AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid        AND blocking_locks.pid != blocked_locks.pid    JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid   WHERE NOT blocked_locks.GRANTED;[local]:5432 pg12@testdb=# CREATE OR REPLACE VIEW vw_lockinfopg12@testdb-# ASpg12@testdb-# SELECT blocked_locks.pid     AS blocked_pid,pg12@testdb-#          blocked_activity.usename  AS blocked_user,pg12@testdb-#          blocking_locks.pid     AS blocking_pid,pg12@testdb-#          blocking_activity.usename AS blocking_user,pg12@testdb-#          blocked_activity.query    AS blocked_statement,pg12@testdb-#          blocking_activity.query   AS current_statement_in_blocking_processpg12@testdb-#    FROM  pg_catalog.pg_locks         blocked_lockspg12@testdb-#     JOIN pg_catalog.pg_stat_activity blocked_activity  ON blocked_activity.pid = blocked_locks.pidpg12@testdb-#     JOIN pg_catalog.pg_locks         blocking_locks pg12@testdb-#         ON blocking_locks.locktype = blocked_locks.locktypepg12@testdb-#         AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASEpg12@testdb-#         AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relationpg12@testdb-#         AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.pagepg12@testdb-#         AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuplepg12@testdb-#         AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxidpg12@testdb-#         AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionidpg12@testdb-#         AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classidpg12@testdb-#         AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objidpg12@testdb-#         AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubidpg12@testdb-#         AND blocking_locks.pid != blocked_locks.pidpg12@testdb-#  pg12@testdb-#     JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pidpg12@testdb-#    WHERE NOT blocked_locks.GRANTED;CREATE VIEWTime: 131.424 ms[local]:5432 pg12@testdb=# select * from vw_lockinfo;-[ RECORD 1 ]-------------------------+---------------------------------------------------------------------------------------------------------------------------------------------------------------------blocked_pid                           | 2184blocked_user                          | pg12blocking_pid                          | 2863blocking_user                         | pg12blocked_statement                     | update t_lock set id = 1000 where id = 1;current_statement_in_blocking_process | select pid,locktype,relation::regclass,mode,page,tuple,virtualxid,transactionid,virtualtransaction,granted,fastpath from pg_locks where relation='t_lock'::regclass;Time: 21.032 ms

显示带有时间属性的locks

CREATE OR REPLACE VIEW vw_lockinfo_timeASSELECT a.datname,         l.relation::regclass,         l.transactionid,         l.mode,         l.GRANTED,         a.usename,         a.query,         a.query_start,         age(now(), a.query_start) AS "age",         a.pidFROM pg_stat_activity aJOIN pg_locks l ON l.pid = a.pidORDER BY a.query_start;[local]:5432 pg12@testdb=# CREATE OR REPLACE VIEW vw_lockinfo_timepg12@testdb-# ASpg12@testdb-# SELECT a.datname,pg12@testdb-#          l.relation::regclass,pg12@testdb-#          l.transactionid,pg12@testdb-#          l.mode,pg12@testdb-#          l.GRANTED,pg12@testdb-#          a.usename,pg12@testdb-#          a.query,pg12@testdb-#          a.query_start,pg12@testdb-#          age(now(), a.query_start) AS "age",pg12@testdb-#          a.pidpg12@testdb-# FROM pg_stat_activity apg12@testdb-# JOIN pg_locks l ON l.pid = a.pidpg12@testdb-# ORDER BY a.query_start;CREATE VIEWTime: 17.799 ms[local]:5432 pg12@testdb=# select * from vw_lockinfo_time;-[ RECORD 1 ]-+---------------------------------------------------------------------------------------------------------------------------------------------------------------------datname       | testdbrelation      | t_locktransactionid | mode          | RowExclusiveLockgranted       | tusename       | pg12query         | select pid,locktype,relation::regclass,mode,page,tuple,virtualxid,transactionid,virtualtransaction,granted,fastpath from pg_locks where relation='t_lock'::regclass;query_start   | 2019-08-13 15:32:23.139886+08age           | 00:11:29.095421pid           | 2863...

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