可作为参数的类型
TDBXWideStringValue
TDBXAnsiStringValue
TDBXInt16Value
TDBXInt32Value
TDBXInt64Value
TDBXSingleValue
TDBXDoubleValue
TDBXBcdValue
TDBXTimeValue
TDBXDateValue
TDBXTimeStampValue
TDBXBooleanValue
TDBXReaderValue
TDBXStreamValue
可作为var和out的参数的类型
boolean
SmallInt
Integer
Int64
Single
Double
AnsiString
String
TDBXTime
TDataTime
TDBXDate
OleVariant
TStream
TDataSet
TParams
TDBXReader
TDBXConnection