一个非递归的DROP COLUMN(也就是,ALTER TABLE ONLY ... DROP COLUMN)从来不会删除任何后代字段, 而是把他们标记为独立定义的,而不是继承的。 TRIGGER,CLUSTER,OWNER,和 TABLESPACE 行为绝不会递归到后代表; 也就是说,它们的行为就像总是声明了 ONLY 一样。 添加一个约束只能在CHECK 约束上递归。 不允许更改系...
if (!stmt->role): 如果没有指定角色,表示这是 ALTER DATABASE 操作。 pg_database_ownercheck(...): 检查当前用户是否为数据库的所有者。 aclcheck_error(...): 如果不是所有者,返回权限检查错误。if (!stmt->role && !stmt->database) { /* Must be superuser to alter settings globally. */ ...
Run the “\dt” command followed by the table name to check the owner of a specific table”: \dt emp_data; The above snippet shows that the owner of the “emp_data” table is “postgres”. Suppose we want to change the owner of the “emp_data” table from “postgres” to “cp_u...
Sets the storage space of the user permanent table. space_limit: specifies the upper limit of the storage space of the permanent table. Value range: A string consists of an integer and unit. The unit can be K/M/G/T/P currently.0indicates no limits. TEMP SPACE Sets the storage space o...
OWNER TO new_owner 将表、序列、视图的属主改变成指定的用户。 SET TABLESPACE new_tablespace 这种形式将表空间修改为指定的表空间并将相关的数据文件移动到新的表空间。但是表上的所有索引都不会被移动,索引可以通过ALTER INDEX语法的SET TABLESPACE选项来修改索引的表空间。 TO { GROUP groupname | NODE ( ...
如何在Postgres中查看新的序列所有权信息？OWNED BY table.column改变相关列;OWNER TO newowner更改拥有...
To execute the ALTER TRIGGER statement, you must be the owner of the table to which the trigger belongs. PostgreSQL ALTER TRIGGER example First, create a new table called employees: DROP TABLE IF EXISTS employees; CREATE TABLE employees( employee_id INT GENERATED ALWAYS AS IDENTITY, first_name...
jobs | postgres locations | postgres regions | postgres countries | postgres (7 rows) Sample Solution: Code: ALTERTABLEcountriesRENAMETOcountry_new; Copy Output: Now, after execute the command see the list of tables. tablename | tableowner ...
OWNER TOnew_ownerSET TABLESPACEnew_tablespace 描述 ALTER TABLE变更一个现存表的定义。它有好几种子形式: ADD COLUMN 这种形式用和CREATE TABLE里一样的语法向表中增加一个新的字段。 DROP COLUMN 这种形式从表中删除一个字段。请注意,和这个字段相关的索引和表约束也会被自动删除。 如果任何表之外的对象依赖于...
loopexecuteformat('alter table %I.%I %s trigger all', nsp,r.relname, act);endloop;end; $BODY$LANGUAGEplpgsql VOLATILE COST100;ALTERFUNCTIONdisable_triggers(boolean,charactervarying) OWNERTOpostgres;theni simply do aselectqueryforeveryschema :SELECTdisable_triggers(true,'public');SELECTdisable_trigg...