CREATE TYPE 功能描述 注意事项 语法格式 参数说明 示例 相关链接 CREATE TYPE 功能描述 在当前数据库中定义一种新的数据类型。定义数据类型的用户将成为该数据类型的拥有者。类型只适用于行存表 有四种形式的CREATE TYPE，分别为：复合类型、基本类型、shell类型和枚举类型。 复合类型 复合类型由一...

Media type Media type This class is designed to work with media types. Object references: Media type Available methods: [mediatype.create]($8c300cc60f6fdfb2.md "manu...

CREATE TYPE Synopsis Syntax Diagram Grammar Semantics Examples See also CREATE TYPE Synopsis To CREATE TYPE statement creates a new user-defined data type in a keyspa...

Type switches Type switches A type switch is a construct that permits several type assertions in series. A type switch is like a regular switch statement, but the cases in ...

Type assertions Type assertions A type assertion provides access to an interface value's underlying concrete value. t := i .( T ) This statement asserts that the int...

Type inference Type inference When declaring a variable without specifying an explicit type (either by using the := syntax or var = expression syntax), the variable's type i...

CREATE TYPE Synopsis Syntax Diagram Grammar Semantics Examples See Also CREATE TYPE AttentionThis page documents an earlier version. Go to the latest (v2.1)version. ...

$type (aggregation) Definition Behavior $type Available Types Example $type (aggregation) Definition $type New in version 3.4. Returns a string that specifies the ...

DROP TYPE 概要 描述 参数 示例 兼容性 另见 DROP TYPE 移除一个数据类型。 概要 DROP TYPE [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ] 描述 DROP TYPE 移除一种用户定义的数据类型。 只有一个类型的拥有者才能移...

ALTER TYPE 概要 描述 参数 示例 兼容性 另见 ALTER TYPE 更改一个数据类型的定义。 概要 ALTER TYPE name action [, ... ] ALTER TYPE name OWNER TO new_owner ALTER TYPE name RENAME ATTRIBUTE a...