ファイル起動時にFileMakerからMySQLに投げられるクエリ

FileMaker Pro をフロントエンド、MySQLを バックエンドにしたアプリを起動する時には、以下のようなクエリが投げられるんですね。　
（FileMaker Pro 13使用時）

SET NAMES utf8　［参考URL］

SET NAMES indicates what character set the client will use to send SQL statements to the server. Thus, SET NAMES 'cp1251' tells the server, “future incoming messages from this client are in character set cp1251.” It also specifies the character set that the server should use for sending results back to the client.

A SET NAMES 'charset_name' statement is equivalent to these three statements:

SET character_set_client = charset_name;
SET character_set_results = charset_name;←A
SET character_set_connection = charset_name; 

SET character_set_results = NULL　［参考URL］

If you want the server to perform no conversion of result sets or error messages, set character_set_results to NULL or binary: 

SET SQL_AUTO_IS_NULL = 0　［参考URL］

If this variable is set to 1 (the default), then after a statement that successfully inserts an automatically generated AUTO_INCREMENT value, you can find that value by issuing a statement of the following form:

SELECT * FROM tbl_name WHERE auto_col IS NULL

If the statement returns a row, the value returned is the same as if you invoked the LAST_INSERT_ID() function.

つまり、INSERT直後、 AUTO_INCREMENT値は存在するにもかかわらず、IS NULL として認識されるというもろ刃の剣。

SET AUTOCOMMIT=0　 [参考URL]

The autocommit mode. If set to 1, all changes to a table take effect immediately. If set to 0, you must use COMMIT to accept a transaction or ROLLBACK to cancel it. By default, client connections begin with autocommit set to 1. If you change autocommit mode from 0 to 1, MySQL performs an automatic COMMIT of any open transaction.

set @@sql_select_limit=DEFAULT 　［参考URL］

The maximum number of rows to return from SELECT statements. The default value for a new connection is the maximum number of rows that the server allows per table, which depends on the server configuration and may be affected if the server build was configured with --with-big-tables. Typical default values are (2³²)–1 or (2⁶⁴)–1. If you have changed the limit, the default value can be restored by assigning a value of DEFAULT.
If a SELECT has a LIMIT clause, the LIMIT takes precedence over the value of sql_select_limit.
sql_select_limit does not apply to SELECT statements executed within stored routines. It also does not apply to SELECT statements that do not produce a result set to be returned to the client. These include SELECT statements in subqueries, CREATE TABLE ... SELECT, and INSERT INTO ... SELECT.　
※うちのDEFAULTは、 (2⁶⁴)–1=18446744073709551615　でした。こんなん返されても困るわ。

SET SQL_MODE='STRICT_ALL_TABLES'　［参考URL］

For transactional tables, an error occurs for invalid or missing values in a data-change statement when either STRICT_ALL_TABLES or STRICT_TRANS_TABLES is enabled. The statement is aborted and rolled back.

SELECT TABLE_NAME, TABLE_COMMENT, TABLE_TYPE, TABLE_SCHEMA FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA LIKE 'easyinv15' AND ( TABLE_TYPE='BASE TABLE' OR TABLE_TYPE='VIEW' ) AND TABLE_NAME LIKE '郵便番号'

INFORMATION_SCHEMA から、アプリで使用さているビューを含むテーブル情報を取得。

select database()

接続中のデータベース名を返す

describe `郵便番号`

当該テーブルのコラム情報を取得

SHOW KEYS FROM `easyinv15`.`郵便番号`

プライマリ等キー情報を取得、Cardinality ってここにあるのね。


SELECT TABLE NAME ～　から SHOW KEYS ～　（イタリック部）は、FileMaker ファイル内に登録されたすべてのMySQLシャドウテーブル（ビュー含む）に対して実行される（ｷﾘｯ


（土屋）