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DF_DRIVER_USE_CACHE_EXPIRATION

Indicates whether expiration checking when structure caching must be used.

Level

Driver

Supported by

The DataFlex SQL Drivers (SQL Server, DB2, and ODBC), revision 5 and higher.

Type

Boolean, temporary

Access

Read/Write

Values

  • True
  • False

Syntax

Use cli.pkg
Get_Attribute DF_DRIVER_USE_CACHE_EXPIRATION of {driverNumber} to {BooleanVariable}
Set_Attribute DF_DRIVER_USE_CACHE_EXPIRATION of {driverNumber} to {True|False}

Driver Configuration Keyword

Use_Cache_Expiration

Remarks

Switches the structure caching intermediate file expiration checking on or off.

Sample Code

Function DriverIndex String sDriver Returns Integer
    String sCurrentDriver
    Integer iNumberOfDrivers iDriver iCount

    Move 0 to iDriver
    Get_Attribute DF_NUMBER_DRIVERS to iNumberOfDrivers

    For iCount From 1 To iNumberOfDrivers
        Get_Attribute DF_DRIVER_NAME of iCount To sCurrentDriver
        If (Uppercase(sCurrentDriver) = Uppercase(sDriver)) Begin
            Move iCount to iDriver
        End
    Loop

    Function_Return iDriver
End_Function // DriverIndex

Procedure ShowDriverAttribute
    Boolean bAttribValue
    Integer iDriver

    Get DriverIndex "MSSQLDRV" To iDriver
    Get_Attribute DF_DRIVER_USE_CACHE_EXPIRATION of iDriver to bAttribValue
    Showln "Use cache expiration: " (If(bAttribValue, "YES", "NO"))
End_Procedure

The sample code above shows the current setting for a given driver.