私はSQLクエリを作成するPHPスクリプトを作成しています。このスクリプトとデータベースはJoomla CMS用であり、具体的にはSOBIProコンポーネントのテーブルを照会しています(このコンポーネントに入力されたデータを使用します)。しかし、SOBI Proテーブルが処理される方法のために、フィールドの各インスタンスがテーブル内のそれ自身の行であるため、これは、取り戻すすべてのフィールドのテーブルの別個のインスタンスを含むことを意味します。これは非常に効率的ではないようであり、実際にはこの検索では時間切れになります。MySQLクエリのパフォーマンスヘルプ。同じテーブルの多くが結合されています
次のようにSQLクエリは(これは私のPHPコードによって生成された後である)である:
SELECT DISTINCT o.id AS entryid, o.parent AS parentID, name.baseData AS title,business.baseData AS business_data,
contact_fn.baseData AS contact_fn_data ,contact_ln.baseData AS contact_ln_data ,position.baseData AS position_data,
civic1.baseData AS civic1_data ,civic2.baseData AS civic2_data ,mailing.baseData AS mailing_data,
community.baseData AS community_data ,municip.baseData AS municip_data ,county.baseData AS county_data,
province.baseData AS province_data ,country.baseData AS country_data ,postal.baseData AS descr_data,
phone.baseData AS phone_data ,tollfree.baseData AS tollfree_data ,fax.baseData AS fax_data,
email.baseData AS email_data ,web.baseData AS web_data ,empTotal.baseData AS empTotal_data
FROM jos_sobipro_object AS o
INNER JOIN jos_sobipro_field_data AS name ON name.sid = o.id
INNER JOIN jos_sobipro_relations AS r ON o.id = r.id
LEFT JOIN jos_sobipro_field_data AS business ON business.sid = o.id AND business.fid = 36
LEFT JOIN jos_sobipro_field_data AS contact_fn ON contact_fn.sid = o.id AND contact_fn.fid = 74
LEFT JOIN jos_sobipro_field_data AS contact_ln ON contact_ln.sid = o.id AND contact_ln.fid = 75
LEFT JOIN jos_sobipro_field_data AS position ON position.sid = o.id AND position.fid = 76
LEFT JOIN jos_sobipro_field_data AS civic1 ON civic1.sid = o.id AND civic1.fid = 77
LEFT JOIN jos_sobipro_field_data AS civic2 ON civic2.sid = o.id AND civic2.fid = 78
LEFT JOIN jos_sobipro_field_data AS mailing ON mailing.sid = o.id AND mailing.fid = 79
LEFT JOIN jos_sobipro_field_data AS community ON community.sid = o.id AND community.fid = 80
LEFT JOIN jos_sobipro_field_data AS municip ON municip.sid = o.id AND municip.fid = 81
LEFT JOIN jos_sobipro_field_data AS county ON county.sid = o.id AND county.fid = 82
LEFT JOIN jos_sobipro_field_data AS province ON province.sid = o.id AND province.fid = 83
LEFT JOIN jos_sobipro_field_data AS country ON country.sid = o.id AND country.fid = 84
LEFT JOIN jos_sobipro_field_data AS postal ON postal.sid = o.id AND postal.fid = 85
LEFT JOIN jos_sobipro_field_data AS phone ON phone.sid = o.id AND phone.fid = 86
LEFT JOIN jos_sobipro_field_data AS tollfree ON tollfree.sid = o.id AND tollfree.fid = 87
LEFT JOIN jos_sobipro_field_data AS fax ON fax.sid = o.id AND fax.fid = 88
LEFT JOIN jos_sobipro_field_data AS email ON email.sid = o.id AND email.fid = 89
LEFT JOIN jos_sobipro_field_data AS web ON web.sid = o.id AND web.fid = 90
LEFT JOIN jos_sobipro_field_data AS empTotal ON empTotal.sid = o.id AND empTotal.fid = 106
WHERE o.approved = 1 AND o.oType = 'entry' AND name.fid = 36 AND name.baseData <> ''
AND name.section = 54 AND r.pid IN (415,418,425,431,458) AND (municip.baseData = "Municipality Name")
ORDER BY name.baseData ASC
ここで、限りmunicip.baseData検索は関与しないとちゃんと速く動作するようですそれがディレクトリ内の15のエントリでさえもフロップする。必要なすべてのフィールドを取り戻しながら、このSQLコードを設計するには、より良い方法が必要です。このクエリはAJAX経由で呼び出され、最終的にディレクトリに2000以上のエントリが存在します。
EDIT:
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE name ref PRIMARY PRIMARY 8 const,const 15 Using where; Using temporary; Using filesort
1 SIMPLE municip ref PRIMARY PRIMARY 4 const 9 Using where
1 SIMPLE o eq_ref PRIMARY,oType PRIMARY 4 [[dbname]].municip.sid 1 Using where
1 SIMPLE county ref PRIMARY PRIMARY 4 const 10
1 SIMPLE province ref PRIMARY PRIMARY 4 const 10
1 SIMPLE country ref PRIMARY PRIMARY 4 const 8
1 SIMPLE postal ref PRIMARY PRIMARY 4 const 9
1 SIMPLE business ref PRIMARY PRIMARY 4 const 15
1 SIMPLE contact_fn ref PRIMARY PRIMARY 4 const 9
1 SIMPLE contact_ln ref PRIMARY PRIMARY 4 const 9
1 SIMPLE position ref PRIMARY PRIMARY 4 const 9
1 SIMPLE civic1 ref PRIMARY PRIMARY 4 const 10
1 SIMPLE civic2 ref PRIMARY PRIMARY 4 const 9
1 SIMPLE phone ref PRIMARY PRIMARY 4 const 10
1 SIMPLE tollfree ref PRIMARY PRIMARY 4 const 9
1 SIMPLE fax ref PRIMARY PRIMARY 4 const 10
1 SIMPLE email ref PRIMARY PRIMARY 4 const 9
1 SIMPLE mailing ref PRIMARY PRIMARY 4 const 11
1 SIMPLE community ref PRIMARY PRIMARY 4 const 9
1 SIMPLE web ref PRIMARY PRIMARY 4 const 10
1 SIMPLE empTotal ref PRIMARY PRIMARY 4 const 10
1 SIMPLE r ref PRIMARY PRIMARY 4 [[dbname]].name.sid 3 Using where; Using index; Distinct
このクエリに対してSQL EXPLAINを実行し、出力を送信します。 –
http://dev.mysql.com/doc/refman/5.1/en/using-explain.html –
本文にEXPLAIN出力が追加されました。 – wolfergiga