4.6.Large Object Processing Commands
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## 4.6.Large Object Processing Commands

本節の命令は PostgreSQL 巨大対象を生成し動かす為に使われる｡巨大対象に関する更なる情報は､PostgreSQL 参照取扱説明書の､依頼者対話機能､巨大対象の章を参照されたい｡ The commands in this section are used to create and work with PostgreSQL Large Objects. For more information about Large Objects, refer to the PostgreSQL reference manual, Client Interfaces, Large Objects chapter.

### Note

巨大対象の命令は､処理区域内部で､BEGINで始まり､COMMITかROLLBACKで終る様に使わねばならない｡ 巨大対象ファイル記述子(pg_lo_openの戻り値)は現在の処理区域のみで有効な為である｡ The Large Object commands must be used within a transaction block, beginning with BEGIN and ending with COMMIT or ROLLBACK. This is because the large object file descriptors (returned by pg_lo_open) are only valid for the current transaction.

巨大対象の用例は､ Section5.5, “Example - Large Objects - Picture Viewer, Part 1 - Store Pictures” と Section5.6, “Example - Large Objects - Picture Viewer, Part 2 - View Pictures” にある｡ Examples of Large Object commands can be found in Section5.5, “Example - Large Objects - Picture Viewer, Part 1 - Store Pictures” and Section5.6, “Example - Large Objects - Picture Viewer, Part 2 - View Pictures”.

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