Unit
DB
Delphi syntax:
type TFieldType = (ftUnknown, ftString, ftSmallint, ftInteger, ftWord, ftBoolean, ftFloat, ftCurrency, ftBCD, ftDate, ftTime, ftDateTime, ftBytes, ftVarBytes, ftAutoInc, ftBlob, ftMemo, ftGraphic, ftFmtMemo, ftParadoxOle, ftDBaseOle, ftTypedBinary, ftCursor, ftFixedChar, ftWideString, ftLargeint, ftADT, ftArray, ftReference, ftDataSet, ftOraBlob, ftOraClob, ftVariant, ftInterface, ftIDispatch, ftGuid, ftTimeStamp, ftFMTBcd);
Description
TFieldType type is the set of values for the DataType property field objects, field definition objects, and parameter objects. Classes in which TFieldType values are used include TField (and descendants), TFieldDef, TParam, TParameter, and TAggregate. TFieldType values are also used in field-related functions and methods like the Add method of TFieldDefs. The following table describes each value:
Value Description
ftUnknown Unknown or undetermined
ftString Character or string field
ftSmallint 16-bit integer field
ftInteger 32-bit integer field
ftWord 16-bit unsigned integer field
ftBoolean Boolean field
ftFloat Floating-point numeric field
ftCurrency Money field
ftBCD Binary-Coded Decimal field that can be converted to Currency type without a loss of precision.
ftDate Date field
ftTime Time field
ftDateTime Date and time field
ftBytes Fixed number of bytes (binary storage)
ftVarBytes Variable number of bytes (binary storage)
ftAutoInc Auto-incrementing 32-bit integer counter field
ftBlob Binary Large OBject field
ftMemo Text memo field
ftGraphic Bitmap field
ftFmtMemo Formatted text memo field
ftParadoxOle Paradox OLE field
ftDBaseOle dBASE OLE field
ftTypedBinary Typed binary field
ftCursor Output cursor from an Oracle stored procedure (TParam only)
ftFixedChar Fixed character field
ftWideString Wide string field
ftLargeint Large integer field
ftADT Abstract Data Type field
ftArray Array field
ftReference REF field
ftDataSet DataSet field
ftOraBlob BLOB fields in Oracle 8 tables
ftOraClob CLOB fields in Oracle 8 tables
ftVariant Data of unknown or undetermined type
ftInterface References to interfaces (IUnknown)
ftIDispatch References to IDispatch interfaces
ftGuid globally unique identifier (GUID) values
ftTimeStamp Date and time field accessed through dbExpress
ftFMTBcd Binary-Coded Decimal field that is too large for ftBCD.
