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私はかなり複雑なクエリを持っており、Zend_Db_Select を使用して段階的に構築できました。クエリは次のようになります。

SELECT `subscribers`.`subscriber_id`, `subscribers`.`email_address`, `subscribers`.`first_name`,
`subscribers`.`last_name`, `t1`.`value` AS `'SingleLineField'`, `t2`.`value` AS `'MultilineField'`,
`t3`.`value` AS `'CheckboxField'`
FROM `subscribers`
INNER JOIN (SELECT subscriber_id
            FROM subscribers
            WHERE list_id =68 AND state=1
            LIMIT 0, 25) AS `s` ON subscribers.subscriber_id = s.subscriber_id
LEFT JOIN `subscribers_custom_data_string` AS `t1` ON subscribers.subscriber_id=t1.subscriber_id AND t1.field_id=177
LEFT JOIN `subscribers_custom_data_string` AS `t2` ON subscribers.subscriber_id=t2.subscriber_id AND t2.field_id=178
LEFT JOIN (SELECT subscribers_multivalued.subscriber_id, field_id, GROUP_CONCAT(value SEPARATOR ',') AS value
           FROM subscribers_multivalued
           INNER JOIN (SELECT subscriber_id
                       FROM subscribers
                       WHERE list_id =68 AND state=1
                       LIMIT 0, 25) AS s1 ON subscribers_multivalued.subscriber_id=s1.subscriber_id
           WHERE field_id=179
           GROUP BY subscribers_multivalued.subscriber_id, field_id) AS `t3` ON subscribers.subscriber_id=t3.subscriber_id AND t3.field_id=179

しかし今、列の順序を動的に変更して、前述のクエリを次のように変換できるようにする必要があります。

SELECT  `subscribers`.`subscriber_id`, `subscribers`.`email_address` , `t1`.`value` AS `'SingleLineField'`, `t2`.`value` AS `'MultilineField'`,
`t3`.`value` AS `'CheckboxField'`, `subscribers`.`first_name`,
`subscribers`.`last_name`
FROM `subscribers`
INNER JOIN (SELECT subscriber_id
            FROM subscribers
            WHERE list_id =68 AND state=1
            LIMIT 0, 25) AS `s` ON subscribers.subscriber_id = s.subscriber_id
LEFT JOIN `subscribers_custom_data_string` AS `t1` ON subscribers.subscriber_id=t1.subscriber_id AND t1.field_id=177
LEFT JOIN `subscribers_custom_data_string` AS `t2` ON subscribers.subscriber_id=t2.subscriber_id AND t2.field_id=178
LEFT JOIN (SELECT subscribers_multivalued.subscriber_id, field_id, GROUP_CONCAT(value SEPARATOR ',') AS value
           FROM subscribers_multivalued
           INNER JOIN (SELECT subscriber_id
                       FROM subscribers
                       WHERE list_id =68 AND state=1
                       LIMIT 0, 25) AS s1 ON subscribers_multivalued.subscriber_id=s1.subscriber_id
           WHERE field_id=179
           GROUP BY subscribers_multivalued.subscriber_id, field_id) AS `t3` ON subscribers.subscriber_id=t3.subscriber_id AND t3.field_id=179

または、たとえば、次のようなものです。

SELECT  `subscribers`.`subscriber_id`, `t1`.`value` AS `'SingleLineField'`, `t2`.`value` AS `'MultilineField'`,
`t3`.`value` AS `'CheckboxField'`, `subscribers`.`email_address`, `subscribers`.`first_name`,
`subscribers`.`last_name`
FROM `subscribers`
INNER JOIN (SELECT subscriber_id
            FROM subscribers
            WHERE list_id =68 AND state=1
            LIMIT 0, 25) AS `s` ON subscribers.subscriber_id = s.subscriber_id
LEFT JOIN `subscribers_custom_data_string` AS `t1` ON subscribers.subscriber_id=t1.subscriber_id AND t1.field_id=177
LEFT JOIN `subscribers_custom_data_string` AS `t2` ON subscribers.subscriber_id=t2.subscriber_id AND t2.field_id=178
LEFT JOIN (SELECT subscribers_multivalued.subscriber_id, field_id, GROUP_CONCAT(value SEPARATOR ',') AS value
           FROM subscribers_multivalued
           INNER JOIN (SELECT subscriber_id
                       FROM subscribers
                       WHERE list_id =68 AND state=1
                       LIMIT 0, 25) AS s1 ON subscribers_multivalued.subscriber_id=s1.subscriber_id
           WHERE field_id=179
           GROUP BY subscribers_multivalued.subscriber_id, field_id) AS `t3` ON subscribers.subscriber_id=t3.subscriber_id AND t3.field_id=179

問題は、Zend_Db_Select のメソッド from を複数回使用できないことです (この場合、新しい結合が生成されますが、これは私が望んでいるものではありません)。クエリの電子メール、姓名フィールドの順序を変更します。この問題を解決する方法はありますか？

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1 に答える 1

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メソッドを使用して、->columns()必要な列を選択できます。from メソッドで空の配列を使用してから、column() 呼び出しを使用します。内部に大きな Zend_Db_Expr が含まれていても、select 引数を必要な方法と順序で記述することができます。

于 2011-05-01T11:55:23.293 に答える