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DF_DRIVER_USE_CACHE

Indicates whether 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 of {driverNumber} to {BooleanVariable}
Set_Attribute DF_DRIVER_USE_CACHE of {driverNumber} to {True|False}

Driver Configuration Keyword

Use_Cache

Remarks

Switches the use of structure caching (using CCH files) on or off. See Structure Caching for more information.

Example 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 of iDriver to bAttribValue
    Showln "Use cache: " (If(bAttribValue, "YES", "NO"))
End_Procedure

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