# fbsql_set_lob_mode

(PHP 4 >= 4.2.0, PHP 5, PHP 7)

fbsql_set_lob_mode — Set the LOB retrieve mode for a FrontBase result set

### 说明

fbsql_set_lob_mode ( resource `$result` , int `$lob_mode` ) : bool

Sets the mode for retrieving LOB data from the database.

When BLOB and CLOB data is retrieved in FrontBase it can be retrieved direct or indirect. Direct retrieved LOB data will always be fetched no matter the setting of the lob mode. If the LOB data is less than 512 bytes it will always be retrieved directly.

### 参数

`result`

  由 fbsql_query() 或 fbsql_db_query() 返回的结果标识符。

`lob_mode`

  Can be one of:

  - `FBSQL_LOB_DIRECT` - LOB data is retrieved directly. When data is fetched from the database with fbsql_fetch_row(), and other fetch functions, all CLOB and BLOB columns will be returned as ordinary columns. This is the default value on a new FrontBase result.
  - `FBSQL_LOB_HANDLE` - LOB data is retrieved as handles to the data. When data is fetched from the database with fbsql_fetch_row(), and other fetch functions, LOB data will be returned as a handle to the data if the data is stored indirect or the data if it is stored direct. If a handle is returned it will be a 27 byte string formatted as @'000000000000000000000000'.

### 返回值

成功时返回 `TRUE`， 或者在失败时返回 `FALSE`。

### 参见

- fbsql_create_blob() - Create a BLOB
- fbsql_create_clob() - Create a CLOB
- fbsql_read_blob() - Read a BLOB from the database
- fbsql_read_clob() - Read a CLOB from the database