ftExtended

ftExtended = 45

Example

function IsExtendedFloat(Field: TField): Boolean;
begin
  Result := Field.DataType = ftExtended;
end;

Usage

ftExtended identifies an Extended floating field whose effective precision and storage depend on platform, field class and provider.

Additional Technical Info

ftExtended is declaration ordinal 45 of TFieldType. It identifies the Extended floating family, but Delphi's effective Extended precision differs by target platform and a database/provider may map it through another representation.

It is binary floating point: many decimal fractions are approximate, NaN/Infinity/provider support varies, and exact equality/money/decimal identifiers are unsafe uses. Preserve the source schema and actual field class rather than assuming the enum guarantees wider-than-Double storage.

The example only inspects metadata and was source-reviewed; no floating calculation/dataset/database/runtime/image test ran.

Created 2026-07-15