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                # ALLOCATE DESCRIPTOR ## Name ALLOCATE DESCRIPTOR?--?分配一個SQL描述區 ## Synopsis ``` ALLOCATE DESCRIPTOR _name_ ``` ## 描述 `ALLOCATE DESCRIPTOR`分配一個新命名SQL描述符區域, 可以用于改變PostgreSQL服務器和主機程序之間的數據。 使用`DEALLOCATE DESCRIPTOR`命令之后應該 釋放描述符區域。 ## 參數 `_name_` SQL描述符名字區分大小寫。這可以是SQL標識符或者宿主變量。 ## 例子 ``` EXEC SQL ALLOCATE DESCRIPTOR mydesc; ``` ## 兼容性 在SQL標準中聲明`ALLOCATE DESCRIPTOR`。 ## 參見 [DEALLOCATE DESCRIPTOR](#calibre_link-2018), [GET DESCRIPTOR](#calibre_link-29), [SET DESCRIPTOR](#calibre_link-651)
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