我们来跑一个alter table: 在另一个 session 中,执行 SQL 查看进度: 看起来 SQL 比较复杂,我们先来看看效果: 这里列出了正在执行的 DDL SQL,进度评估,当前运行语句的时间,和估算的剩余时间。 不断获取进度: 可以看到,估算的剩余时间不是完全精确,在整个过程中,进度在不停被评估。不过这种精确度对于我们也足够...
SELECT*FROMv$lockWHEREsidIN(...); 2、合理配置 DDL 超时时间 可通过 DDL_LOCK_TIMEOUT 参数控制 DDL 等待锁的时间,单位为秒: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 --设置等待时间为10秒ALTERSESSIONSETDDL_LOCK_TIMEOUT=10;--设置为0则立即报错,不等待ALTERSESSIONSETDDL_LOCK_TIMEOUT=0;...
{ new_owner | CURRENT_USER | SESSION_USER } REPLICA IDENTITY { DEFAULT | USING INDEX index_name | FULL | NOTHING } and partition_bound_spec is: IN ( partition_bound_expr [, ...] ) | FROM ( { partition_bound_expr | MINVALUE | MAXVALUE } [, ...] ) TO ( { partition_bound_...
SESSION 1 SQL> show parameter deferred_segment_creation NAME TYPE VALUE --- --- --- deferred...
SET configuration_parameter FROM CURRENT ALTER USER { role_specification | ALL } [ IN DATABASE database_name ] RESET configuration_parameter ALTER USER { role_specification | ALL } [ IN DATABASE database_name ] RESET ALL 其中 role_specification 可以是: role_name | CURRENT_USER | SESSION_USE...
PostgreSQL中对应的语法在alter table中,因为触发器与表相关,这样设计语法也符合逻辑的。 https://www.postgresql.org/docs/devel/static/sql-altertable.html ALTERTABLE[ IFEXISTS] [ONLY] name [*] action [, ... ] DISABLETRIGGER[ trigger_name|ALL|USER] ...
{ new_owner | CURRENT_USER | SESSION_USER } ALTER FUNCTION name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] SET SCHEMA new_schema ALTER FUNCTION name [ ( [ [ argmode ] [ argname ] argtype [, ...] ] ) ] [ NO ] DEPENDS ON EXTENSION extension_name 其中 ...
We can also set the concurrent connection limit to the database using the alter database statement in PostgreSQL. We can set the session default setting by using the given configuration parameter. When you set the value to the default, new sessions inherit the system-wide settings, and they ...
Only superusers or database owners can change the session default for a run-time configuration for the database. PostgreSQL ALTER DATABASE examples First, log in to PostgreSQL using the postgres user and create a new database named testdb2 for the demonstration. CREATE DATABASE testdb2; Second...
Summary: in this tutorial, you will learn how to use the PostgreSQL ALTER ROLE statement to modify the attributes of a role, rename a role, and change a role’s session default for a configuration variable. Using the PostgreSQL ALTER ROLE to modify attributes of roles To change attributes of...