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    TFieldDef.Create

    Constructor for TFieldDef.

    Declaration

    Source position: db.pas line 197

    public 
constructor Create(ACollection: TCollection);  override;

constructor Create(AOwner: TFieldDefs; const AName: string; 
                  ADataType: TFieldType; ASize: Integer; 
                  ARequired: Boolean; AFieldNo: LongInt; 
                  ACodePage: TSystemCodePage=CP_ACP);  overload; overload;

    Description

    Create is the constructor for the TFieldDef class.

    If a simple call is used, with a single argument ACollection, the inherited Create is called and the Field number is set to the incremented current index.

    If the more complicated call is used, with multiple arguments, then after the inherited Create call, the Name, datatype, size, precision, FieldNo, Required and CodePage property are all set according to the passed arguments.

    Errors

    If a duplicate name is passed, then an exception will occur.

    See also

    Name Description
    Name
    datatype Data type for the field.
    size Size of the buffer needed to store the data of the field.
    precision Precision used in BCD (Binary Coded Decimal) fields.
    FieldNo Field number.
    Required Is the field required ?
    CodePage System code page for the values in string and wide string field types.