ドキュメントデータベースとして MySQLを使う!? ～MySQL JSON UDF～
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1 Copyright © 2013, Oracle and/or its affiliates. All rights reserved. ドキュメントデータベースとして MySQLを使う!? ~MySQL JSON UDF~ 日本オラクル株式会社 山崎 由章 / MySQL Senior Sales Consultant, Asia Pacific and Japan
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MyNA会 2013年9月での発表資料に加筆修正しました。JSON UDFを使って、フィードバックレポートを下さい！！
Transcript of ドキュメントデータベースとして MySQLを使う!? ～MySQL JSON UDF～
1 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
ドキュメントデータベースとして
MySQLを使う!?
~MySQL JSON UDF~
日本オラクル株式会社
山崎 由章 / MySQL Senior Sales Consultant,
Asia Pacific and Japan
2 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
以下の事項は、弊社の一般的な製品の方向性に関する概要を説明するものです。また、情報提供を唯一の目的とするものであり、いかなる契約にも組み込むことはできません。以下の事項は、マテリアルやコード、機能を提供することをコミットメント（確約）するものではないため、購買決定を行う際の判断材料になさらないで下さい。オラクル製品に関して記載されている機能の開発、リリースおよび時期については、弊社の裁量により決定されます。
OracleとJavaは、Oracle Corporation 及びその子会社、関連会社の米国及びその他の国における登録商標です。文中の社名、商品名等は各社の商標または登録商標である場合があります。
3 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
MySQL Connect 2013の中でこんなセッションが・・・
One More Step to the NoSQL Side: MySQL JSON Functions
4 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
http://labs.mysql.com/ にアクセスしてみると・・・
MySQL JSON UDFs !?
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MySQLにJSONを扱うための関数を追加できる！！ ※現時点(2013/9/30)では、Lab版(実験版)
6 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
セットアップ方法(Linux/UNIX環境の場合) ※詳細はREADMEファイル参照
1． http://labs.mysql.com/ から“MySQL JSON UDFs”を
ダウンロード
2．ダウンロードしたファイルに含まれている“libmy_json_udf.so”を
plugin_dir に配置
(plugin_dirの確認方法：mysql> show global variables like 'plugin_dir';)
3．CREATE FUNCTIONコマンドでUDFを作成
※UDF(User-DefinedFunction：ユーザ定義関数)
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mysql> create function json_valid returns integer soname 'libmy_json_udf.so';
mysql> create function json_search returns string soname 'libmy_json_udf.so';
mysql> create function json_extract returns string soname 'libmy_json_udf.so';
mysql> create function json_replace returns string soname 'libmy_json_udf.so';
mysql> create function json_append returns string soname 'libmy_json_udf.so';
mysql> create function json_remove returns string soname 'libmy_json_udf.so';
mysql> create function json_set returns string soname 'libmy_json_udf.so';
mysql> create function json_merge returns string soname 'libmy_json_udf.so';
mysql> create function json_contains_key returns integer soname 'libmy_json_udf.so';
■CREATE FUNCTION
セットアップ方法(Linux/UNIX環境の場合) ※詳細はREADMEファイル参照
8 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
補足：READMEファイルのバグ
Linux/UNIX環境に関して、ファンクション作成コマンドが
以下の通り紹介されているが、ライブラリファイルの名前は
‘libmy_json_udf.so’となっている。
ファンクション作成コマンド
create function json_valid returns integer soname 'libmy_json.so';
※http://bugs.mysql.com/bug.php?id=70392
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JSON UDFのデモ
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サンプルテーブル
mysql> select * from json;
+----+--------------------------------------------------------------------------------+
| id | col1 |
+----+--------------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",15]} |
| 2 | {"id":2,"Name":"Worker grandmas","price":300000,"Conditions":["factories",15]} |
| 3 | {"id":3,"Name":"Miner grandmas","price":1000000,Conditions:["mines",15]} |
| 4 | {"id":4,"Name":"Yoshiaki Yamasaki"} |
+----+--------------------------------------------------------------------------------+
4 rows in set (0.00 sec)
※id=3の列には、フォーマット間違い有り
(””が抜けている)
※id=4の列はNameだけ
11 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_valid：JSONドキュメントのフォーマットチェック (フォーマットが正しければ1、正しくなければ0)
mysql> select id,json_valid(col1) from json;
+----+------------------+
| id | json_valid(col1) |
+----+------------------+
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
+----+------------------+
4 rows in set (0.00 sec)
12 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_search：値が含まれるキーを検索
mysql> select id,json_search(col1,'"Farmer grandmas"') from json where id=1; +----+---------------------------------------+ | id | json_search(col1,'"Farmer grandmas"') | +----+---------------------------------------+ | 1 | Name:: | +----+---------------------------------------+ 1 row in set (0.00 sec) mysql> select json_search(col1,'"farms"') from json; +-----------------------------+ | json_search(col1,'"farms"') | +-----------------------------+ | 0:Conditions:: | | NULL | | NULL | | NULL | +-----------------------------+ 4 rows in set (0.00 sec)
13 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_extract：値を抽出
mysql> select id,json_extract(col1,'price') from json; +----+----------------------------+ | id | json_extract(col1,'price') | +----+----------------------------+ | 1 | 50000 | | 2 | 300000 | | 3 | NULL | | 4 | NULL | +----+----------------------------+ 4 rows in set (0.00 sec) mysql> select id,json_extract(col1,'Conditions') from json; +----+---------------------------------+ | id | json_extract(col1,'Conditions') | +----+---------------------------------+ | 1 | ["farms",15] | | 2 | ["factories",15] | | 3 | NULL | | 4 | NULL | +----+---------------------------------+ 4 rows in set (0.00 sec)
14 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_remove：特定の要素を除去
mysql> select id,json_remove(col1,'price') from json;
+----+------------------------------------------------------------------+
| id | json_remove(col1,'price') |
+----+------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas",,"Conditions":["farms",15]} |
| 2 | {"id":2,"Name":"Worker grandmas",,"Conditions":["factories",15]} |
| 3 | NULL |
| 4 | {"id":4,"Name":"Yoshiaki Yamasaki"} |
+----+------------------------------------------------------------------+
4 rows in set (0.00 sec)
15 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_merge：JSONドキュメントのマージ
mysql> select id,json_merge(col1,col1) from json where id=1;
+----+----------------------------------------------------------------------------------------------------------------------------------------------------+
| id | json_merge(col1,col1) |
+----+----------------------------------------------------------------------------------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",15], "id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",15]} |
+----+----------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
16 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_contains_key：特定のキーが含まれているか確認
mysql> select id,json_contains_key(col1,'Conditions') from json;
+----+--------------------------------------+
| id | json_contains_key(col1,'Conditions') |
+----+--------------------------------------+
| 1 | 1 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
+----+--------------------------------------+
4 rows in set (0.00 sec)
17 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_replace：値を置換
mysql> select id,json_replace(col1,'Name','"農家のおばあちゃん"') from json where id=1;
+----+--------------------------------------------------------------------------------------+
| id | json_replace(col1,'Name','"農家のおばあちゃん"') |
+----+--------------------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"農家のおばあちゃん","price":50000,"Conditions":["farms",15] |
+----+--------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
※最後の’}’が欠けている現象については、以下のbugレポートを登録済み
http://bugs.mysql.com/bug.php?id=70486
18 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_replace：値を置換
mysql> select id,json_replace(col1,'Conditions','0','10') from json where id=1; +----+----------------------------------------------------------------------+ | id | json_replace(col1,'Conditions','0','10') | +----+----------------------------------------------------------------------+ | 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":[10,15]} | +----+----------------------------------------------------------------------+ 1 row in set (0.00 sec) mysql> select id,json_replace(col1,'Conditions','1','10') from json where id=1; +----+---------------------------------------------------------------------------+ | id | json_replace(col1,'Conditions','1','10') | +----+---------------------------------------------------------------------------+ | 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",10]} | +----+---------------------------------------------------------------------------+ 1 row in set (0.00 sec)
19 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_set：値を設定
mysql> select id,json_set(col1,'Name','"農家のおばあちゃん"') from json where id=1;
+----+--------------------------------------------------------------------------------------+
| id | json_set(col1,'Name','"農家のおばあちゃん"') |
+----+--------------------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"農家のおばあちゃん","price":50000,"Conditions":["farms",15] |
+----+--------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
20 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_set：値を設定
mysql> select id,json_set(col1,'Conditions','0','10') from json where id=1;
+----+----------------------------------------------------------------------+
| id | json_set(col1,'Conditions','0','10') |
+----+----------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":[10,15]} |
+----+----------------------------------------------------------------------+
1 row in set (0.00 sec)
mysql> select id,json_set(col1,'Conditions','1','10') from json where id=1;
+----+---------------------------------------------------------------------------+
| id | json_set(col1,'Conditions','1','10') |
+----+---------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",10]} |
+----+---------------------------------------------------------------------------+
1 row in set (0.00 sec)
21 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_set：値を設定
mysql> select id,json_set(col1,'Conditions','2','10') from json where id=1;
+----+-------------------------------------------------------------------------------+
| id | json_set(col1,'Conditions','2','10') |
+----+-------------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",15, 10]} |
+----+-------------------------------------------------------------------------------+
1 row in set (0.00 sec)
22 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
json_append：配列に値を追加
mysql> select id,json_append(col1,'Conditions','2','10') from json where id=1;
+----+-------------------------------------------------------------------------------+
| id | json_append(col1,'Conditions','2','10') |
+----+-------------------------------------------------------------------------------+
| 1 | {"id":1,"Name":"Farmer grandmas","price":50000,"Conditions":["farms",15, 10]} |
+----+-------------------------------------------------------------------------------+
1 row in set (0.00 sec)
23 Copyright © 2013, Oracle and/or its affiliates. All rights reserved.
色々試して、http://bugs.mysql.com/まで
フィードバックを下さい！！
※今のところ(2013/9/30) JSON UDF専用のカテゴリは無いので、
「MySQL Server: User-defined functions (UDF)」の
カテゴリでレポートを下さい。
![Navigating State - php[architect] · Navigating State The Dev Lead Trenches: Issue Workflows for Teams ... The MySQL Document Store MySQL 5.7 introduced a native JSON ... been greatly](https://static.fdocuments.net/doc/165x107/5ec5ec2e0ef944652c202fd2/navigating-state-phparchitect-navigating-state-the-dev-lead-trenches-issue.jpg)
