php - MySQLi 准备好的语句未采用调用过程的有效查询

Question

$prepared = $db->prepare("
        SET @content = ?;

        CALL add_interest_if_not_exists( @content );

        SET @iid = (SELECT interests_id
                    FROM interests
                    WHERE content = @content);

        REPLACE INTO profile_interests (user_id, interests_id, likes)
        VALUES (
            ?,
            @iid,
            ?
        )
    ");
echo $db->error;

错误是:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'CALL add_interest_if_not_exists( @content ); SET @iid = (SELECT i' at line 3

该查询使用 MySQL 工作台(硬编码值)进行工作。为什么不在我准备好的声明中......

Answer 1

这不是单个查询，而是一组查询。

因此，您必须一一运行它们，每个都使用单独的 query() 或 prepare()/execute() 调用。