更新

postgresql_and_edb/postgresql锁表查询.md

@@ -27,6 +27,32 @@ SELECT pg_terminate_backend(14448)
 
 
 
+
+```
+SELECT
+	w1.pid AS 等待进程,
+	w1.MODE AS 等待锁模式,
+	w2.usename AS 等待用户,
+	w2.query AS 等待会话,
+	b1.pid AS 锁的进程,
+	b1.MODE 锁的锁模式,
+	b2.usename AS 锁的用户,
+	b2.query AS 锁的会话,
+	b2.application_name 锁的应用,
+	b2.client_addr 锁的 IP地址,
+	b2.query_start 锁的语句执行时间 
+FROM
+	pg_locks w1
+	JOIN pg_stat_activity w2 ON w1.pid = w2.pid
+	JOIN pg_locks b1 ON w1.transactionid = b1.transactionid 
+	AND w1.pid != b1.pid
+	JOIN pg_stat_activity b2 ON b1.pid = b2.pid 
+WHERE
+	NOT w1.GRANTED;
+```
+
+
+
 ```postgresql
 -- 查看表的总大小，包括索引大小  
 select pg_size_pretty(pg_total_relation_size('test'));