[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] Reference for unit 'db' (#fcl)

TFieldDef.Create

Constructor for TFieldDef.

Declaration

Source position: db.pas line 181

public constructor TFieldDef.Create(

  ACollection: TCollection

); override;

constructor TFieldDef.Create(

  AOwner: TFieldDefs;

  const AName: string;

  ADataType: TFieldType;

  ASize: Integer;

  ARequired: Boolean;

  AFieldNo: LongInt

); overload;

Arguments

ACollection

  

TFieldDefs instance to which to append the definition, or Nil

Arguments

AOwner

  

Owner of the fielddef.

AName

  

Name of the field

ADataType

  

Data type of the field

ASize

  

Storage size for the field contents, or zero for fixed-size fields

ARequired

  

Is the fields required or not

AFieldNo

  

Number of the field

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 and the Required property are all set according to the passsed arguments.

Errors

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

See also

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 ?


Documentation generated on: Sep 28 2017