Apex トリガーで DML を使用する際の注意点について説明します。
Apex トリガー内においてもガバナ制限を考慮しないといけません。
特に以下 (*Apex トリガー例1)のように for loop 内で DML を記述すると DML の発行回数が Trigger.New
オブジェクトに格納されている要素数分実行されてしまいます。
Apex トリガー例1 )
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for( Account ac : Trigger.New ){
}
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DML の発行回数を減らすためには、以下のように for loop 内には記述せず、複数レコードの更新処理を
一括で行うことで可能となります。
Apex トリガー例2 )
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