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DF_DRIVER_DEFAULT_NULLABLE_ASCII

The default setting for the "nullability" of newly created ASCII columns.

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_DEFAULT_NULLABLE_ASCII of {driverNumber} to {BooleanVariable}
Set_Attribute DF_DRIVER_DEFAULT_NULLABLE_ASCII of {driverNumber} to {True|False}

Driver Configuration Keyword

Default_Default_Nullable_Ascii

Remarks

Columns can be allowed to contain null values, so-called "nullable" columns. This attribute sets up the default "nullability" of ASCII columns. In general, we recommend not allowing null values in columns (of any type). See the section Null values and defaults for more information.

Example Code

The following sample code shows the current setting for a given database:

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_DEFAULT_NULLABLE_ASCII of iDriver to bAttribValue
    Showln "Default nullable ASCII: " (If(bAttribValue, "YES", "NO"))
End_Procedure