通过构造一个查询系统目录表pg_class、pg_depend和pg_attribute，可以看到owned by列，我不确定pg_depend...
在PostgreSQL中,ALTER TABLE命令用于修改现有表的结构。当对表进行大规模修改时,可能会导致ALTER TABLE执行变慢的情况。 Alter Table太慢可能由以下几个因素引起:...
( sequence_options ) ] | UNIQUE index_parameters | PRIMARY KEY index_parameters | REFERENCES reftable [ ( refcolumn ) ] [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE referential_action ] [ ON UPDATE referential_action ] } [ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED...
[ PRIVILEGES ] } ON SEQUENCES FROM { [ GROUP ] role_name | PUBLIC } [, ...] [ CASCADE | RESTRICT ] REVOKE [ GRANT OPTION FOR ] { EXECUTE | ALL [ PRIVILEGES ] } ON { FUNCTIONS | ROUTINES } FROM { [ GROUP ] role_name | PUBLIC } [, ...] [ CASCADE | RESTRICT ] REVOKE ...
[ PRIVILEGES ] } ON SEQUENCES TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ] GRANT { EXECUTE | ALL [ PRIVILEGES ] } ON FUNCTIONS TO { [ GROUP ] role_name | PUBLIC } [, ...] [ WITH GRANT OPTION ] GRANT { USAGE | ALL [ PRIVILEGES ] } ON TYPES ...
MySQL 是一个广泛使用的关系型数据库管理系统,用于许多 Web 应用程序和企业级解决方案中。在 MySQL 中,用户权限的管理是非常重要的,以确保数据库安全性和数据完整性。在某些情况下,需要为用户添加特定的权限,例如 ALTER VIEW 权限,以允许他们修改视图。
[ PROCEDURAL ] LANGUAGE object_name | SCHEMA object_name | SEQUENCE object_name | SERVER object_name | TABLE object_name | TEXT SEARCH CONFIGURATION object_name | TEXT SEARCH DICTIONARY object_name | TEXT SEARCH PARSER object_name | TEXT SEARCH TEMPLATE object_name | TYPE object_name | VIEW...
[ PROCEDURAL ] LANGUAGE object_name | SCHEMA object_name | SEQUENCE object_name | SERVER object_name | TABLE object_name | TEXT SEARCH CONFIGURATION object_name | TEXT SEARCH DICTIONARY object_name | TEXT SEARCH PARSER object_name | TEXT SEARCH TEMPLATE object_name | TRANSFORM FOR type_name ...
For information about using non-compatible implementations of the ALTER TRIGGER command that are supported by EDB Postgres Advanced Server, see the PostgreSQL core documentation. Description ALTER TRIGGER changes the properties of an existing trigger. You must own the table the trigger ac...
ALTER FUNCTION sqrt(integer) RENAME TO square_root; 1. COMPATIBILITY There is anALTER FUNCTIONstatement in the SQL standard, but it does not provide the option to rename the function. SEE ALSO CREATE FUNCTION [create_function(7)], DROP FUNCTION [drop_function(l)]...