get_meta_sql

函数


      get_meta_sql ( $meta_query, $type, $primary_table, $primary_id_column, $context = null )

参数

(array) $meta_query A meta query.

Required: 是
(string) $type Type of meta.

Required: 是
(string) $primary_table Primary database table name.

Required: 是
(string) $primary_id_column Primary ID column name.

Required: 是
(object) $context Optional. The main query object

Required: 否

Default: null

返回值

(string[]|false) { Array containing JOIN and WHERE SQL clauses to append to the main query, or false if no table exists for the requested meta type. @type string $join SQL fragment to append to the main JOIN clause. @type string $where SQL fragment to append to the main WHERE clause. }

相关

WP_Meta_Query

定义位置

wp-includes/meta.php , line 1242

相关方法: get_tax_sql get_meta_keys _get_meta_table get_tags get_comments

引入: 3.2.0

弃用: -

get_meta_sql函数用于生成可用于查询WordPress数据库中元数据的SQL条款: 这个函数可以用来对元数据进行自定义查询。

给定一个元查询，生成SQL条款，附加到主查询中。

function get_meta_sql( $meta_query, $type, $primary_table, $primary_id_column, $context = null ) {
	$meta_query_obj = new WP_Meta_Query( $meta_query );
	return $meta_query_obj->get_sql( $type, $primary_table, $primary_id_column, $context );
}

get_meta_sql

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