[PHP-users 3857] [Patch] pgsql function
Yasuo Ohgaki
php-users@php.gr.jp
Mon, 26 Nov 2001 14:54:09 +0900
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大垣です。
PHP+PostgreSQLの利用者は日本の方が多いので、こちらにもメールします。
PostgreSQLモジュールの非同期クエリー関数が必要だったのでパッチを作
りました。(PHP 4.2.0-dev用。4.1.0RCでは一部手動でパッチする必要あ
り。前に送ったパッチはlibpqの使い方を知らないと使えない+ゴミ処理を
していませんでしたが、今回のパッチはこれらの処理をしています)
このパッチで追加される関数は以下の通りです。
pg_send_query() - 非同期クエリーの送信
pg_get_result() - 非同期クエリー結果の取得
pg_is_busy() - 非同期クエリーを実行中か確認
pg_request_cancel - 実行中の非同期クエリーのキャンセル
pg_reset() - 現在の接続パラメータでDBに再接続 (エラーリカバリ用)
pg_status() - 接続状態の取得
使い方はテストスクリプトを参照してください。(output bufferをオフに
すると
非同期でクエリが実行されている事が確認できます)
備考：pg_send_query()を使って複数のクエリーを別々に送信する事はで
きません。だたし、複数のクエリーを一緒に送信して、pg_get_result()
で別々に結果を取得する事はできます。pg_get_result()を呼ぶ前に、
pg_is_busy()を使って取得可能な結果があるか確認しないと、
pg_get_result()はプロセスをブロックします。libpqにSSLを組み込んで
いると非同期に実行出来ない場合があります。Windowsではlibpqのコンパ
イル時にフラグを立ててコンパイルされていないと、プロセスはブロック
されます。
他に追加した方が良いlibpqがサポートする非同期関数、不具合があった
場合、変更した方が良い部分がある場合はメールをお願いします。
--
Yasuo Ohgaki
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