pg_cancel_backend()和pg_terminate_backend() 两个函数的官方解释: pg_cancel_backend() 取消后台操作,回滚未提交事物 pg_terminate_backend() 中断session,回滚未提交事物 pg_cancel_backend()举例: session A: postgres=# create table t1 (a int); CREATE TABLE postgres=# begin; postgres=...
当PostgreSQL进程无法被cancel, terminate时,进程处于什么状态?为什么无法退出? 例子 1、无法被kill的进程 Type "help" for help. postgres=# select pg_cancel_backend(60827); pg_cancel_backend --- t (1 row) postgres=# select pg_terminate_backend(60827); pg_terminate_backend --- t (1 row)...
pg_cancel_backend( pid )参数 pid 要取消的查询的进程 ID (PID)。您不能通过指定查询 ID 来取消查询;您必须指定查询的进程 ID。需要 INTEGER 值。返回类型 无使用说明 如果多个会话中的查询在同一个表上保持锁定状态,您可以使用 PG_TERMINATE_BACKEND 函数终止其中一个会话,这将强制所终止会话中所有当前运行...
最终我得出的结论是：窗口函数必须在 WHERE 和 GROUP BY 发生之后才能运行，所以答案是我们这样做。于是...
敲键盘正成为一种负担，你在想，键盘是否就像西西弗斯推着的那块巨石。 咖啡一杯接着一杯。不敢再喝...
Query the PG__LOCKS catalog table to view currently held locks. If you cannot cancel a query because it is in transaction block (BEGIN … END), you can terminate the session in which the query is running by using the PG_TERMINATE_BACKEND function. ...
在大部份情况下我们都可以使用 PCA 进行线性降维。从图像处理到非结构化数据，无时无刻不在。我们甚至...
PG_CANCEL_BACKEND PG_TERMINATE_BACKEND REBOOT_CLUSTER SET_CONFIG Funções de informação do sistema CURRENT_AWS_ACCOUNT CURRENT_DATABASE CURRENT_NAMESPACE CURRENT_SCHEMA CURRENT_SCHEMAS CURRENT_SESSION_ARN CURRENT_USER CURRENT_USER_ID DEFAULT_IAM_ROLE GET_MOUNTED_ROLE HAS_ASSUMEROLE_PRIVILEGE ...
all locks and roll back the transaction. Query the PG__LOCKS catalog table to view currently held locks. If you cannot cancel a query because it is in transaction block (BEGIN … END), you can terminate the session in which the query is running by using the PG_TERMINATE_BACKEND function...
Wenn Sie eine Abfrage nicht abbrechen können, weil sie sich im Transaktionsblock (BEGIN...END) befindet, können Sie die Sitzung, in der die Abfrage ausgeführt wird, mit der Funktion PG_ TERMINATE _ BACKEND beenden. Beispiele Um eine Abfrage abzubrechen, die aktuell ausgeführt wird, ...