Handling of LONG columns

# odbc_longreadlen

(PHP 4, PHP 5, PHP 7, PHP 8)

odbc_longreadlen — Handling of LONG columns

### 说明

function odbc_longreadlen(Odbc\Result `$statement`, int `$length`): true

Controls handling of `LONG`, `LONGVARCHAR` and `LONGVARBINARY` columns. The default length can be set using the uodbc.defaultlrl php.ini directive.

### 参数

`statement`

  ODBC 结果对象.

`length`

  The number of bytes returned to PHP is controlled by the parameter length. If it is set to `0`, long column data is passed through to the client (i.e. printed) when retrieved with odbc_result().

### 返回值

总是返回 `true`。

### 更新日志

版本 | 说明
--- | ---
8.4.0 | `statement` 现在需要 Odbc\Result 实例；之前需要 resource。

### 注释

> 注意:

> Handling of `LONGVARBINARY` columns is also affected by odbc_binmode().

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