Updated at: 2022-08-03 GMT+08:00

SQLSetEnvAttr

Function

SQLSetEnvAttr sets environment attributes.

Prototype

SQLRETURN SQLSetEnvAttr(SQLHENV EnvironmentHandle SQLINTEGER Attribute, SQLPOINTER ValuePtr, SQLINTEGER StringLength);

Parameters

Table 1 SQLSetEnvAttr parameters

Keyword

Description

EnviromentHandle

Environment handle.

Attribute

Environment attribute to be set. Its value must be one of the following:

  • SQL_ATTR_ODBC_VERSION: ODBC version
  • SQL_CONNECTION_POOLING: connection pool attribute
  • SQL_OUTPUT_NTS: string type returned by the driver

ValuePtr

Pointer to the Attribute value. ValuePtr depends on the Attribute value, and can be a 32-bit integer value or a null-terminated string.

StringLength

If ValuePtr points to a string or a binary buffer, this parameter should be the length of *ValuePtr. If ValuePtr points to an integer, StringLength is ignored.

Return Values

  • SQL_SUCCESS indicates that the call succeeded.
  • SQL_SUCCESS_WITH_INFO indicates some warning information is displayed.
  • SQL_ERROR indicates major errors, such as memory allocation and connection failures.
  • SQL_INVALID_HANDLE indicates that invalid handles were called. Values returned by other APIs are similar to the preceding values.

Precautions

If SQLSetEnvAttr returns SQL_ERROR or SQL_SUCCESS_WITH_INFO, the application can then call SQLGetDiagRec, set HandleType and Handle to SQL_HANDLE_ENV and EnvironmentHandle, and obtain the SQLSTATE value. The SQLSTATE value provides the detailed function calling information.

Examples

See Examples.

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