Postgresql 中文操作指南

CREATE ACCESS METHOD

CREATE ACCESS METHOD — 定义新的访问方法

CREATE ACCESS METHOD — define a new access method

CREATE ACCESS METHOD name
    TYPE access_method_type
    HANDLER handler_function

CREATE ACCESS METHOD 创建一个新的访问方法。

CREATE ACCESS METHOD creates a new access method.

访问方法名称在数据库中必须唯一。

The access method name must be unique within the database.

只有超级用户才能定义新的访问方法。

Only superusers can define new access methods.

name
- The name of the access method to be created.
access_method_type
- This clause specifies the type of access method to define. Only TABLE and INDEX are supported at present.
handler_function
- handler_function is the name (possibly schema-qualified) of a previously registered function that represents the access method. The handler function must be declared to take a single argument of type internal, and its return type depends on the type of access method; for TABLE access methods, it must be table_am_handler and for INDEX access methods, it must be index_am_handler. The C-level API that the handler function must implement varies depending on the type of access method. The table access method API is described in Chapter 63 and the index access method API is described in Chapter 64.

使用处理函数 heptree_handler 创建一个索引访问方法 heptree ：

Create an index access method heptree with handler function heptree_handler:

CREATE ACCESS METHOD heptree TYPE INDEX HANDLER heptree_handler;

CREATE ACCESS METHOD 是 PostgreSQL 扩展。

CREATE ACCESS METHOD is a PostgreSQL extension.