DBFieldDef :: DBFieldDef - Constructor

Implementation overview

• Construct empty field definition
  DBFieldDef :: DBFieldDef (  )
• Construct by field metadata
  DBFieldDef :: DBFieldDef ( fmcbptr )
• - internal feature (not documented)
  DBFieldDef :: DBFieldDef ( fldnames, smcbptr )
• Field definition by field properties
  DBFieldDef :: DBFieldDef ( fldnames, typenames, fldnsid, fldreflev, fldsize, fldprec, flddim, trans_opt, smcbptr, generic_type, secrefr, extnames, irefname, indexptr )
• - internal feature (not documented)
  DBFieldDef :: DBFieldDef ( fldnames, typenames, fldnsid, fldsize, fldprec )
• Construct by property handle
  DBFieldDef :: DBFieldDef ( dictptr, ph, smcbptr, indexptr, domopt, logrefr, secrefr, depopt, extnames, irefname )

Implementation details

1. Construct empty field definition
   DBFieldDef  :: DBFieldDef (  )
   
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2. Construct by field metadata
   DBFieldDef  :: DBFieldDef ( fmcb *fmcbptr )
   

   • fmcbptr - Pointer to field metadata
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3. - internal feature (not documented)
   DBFieldDef  :: DBFieldDef ( NString &fldnames, smcb *smcbptr )
   

   • fldnames - Property name or path
   • smcbptr - Pointer to general structure definition

     The smcb is general way to define any type of structure. It contains information for the structure and its properties. The definition does contain only descriptive information (no access information).

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4. Field definition by field properties
   DBFieldDef  :: DBFieldDef ( NString &fldnames, NString &typenames, int32 fldnsid, SDB_RLEV fldreflev, uint16 fldsize, uint16 fldprec, uint16 flddim, logical trans_opt, smcb *smcbptr, NString &generic_type, logical secrefr, NString &extnames, NString &irefname, DBIndex *indexptr )
   

   • fldnames - Property name or path
   • typenames - Type name
   • fldnsid - Namespace identification number

     The namespace identification number is an internal number, which can be calculated from a scope path.

   • fldreflev - Reference level
   • fldsize - Field size
   • fldprec - Precision for numerical values
   • flddim - Field dimension
   • trans_opt - Indicates a transient field
   • smcbptr - Pointer to general structure definition

     The smcb is general way to define any type of structure. It contains information for the structure and its properties. The definition does contain only descriptive information (no access information).

   • generic_type - - internal feature (not documented)
   • secrefr - Indicates a secondary reference
   • extnames - Extent name

     The name contains the name of the extent, only. It does not contain a namespace scope.

     Notes:

     retval checked for const &NString

   • irefname - Inverse reference field name or path

     The inverse reference field name is passed as 0-terminated string.

   • indexptr - Internal index definition

     Pointer to an internal index definition.

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5. - internal feature (not documented)
   DBFieldDef  :: DBFieldDef ( NString &fldnames, NString &typenames, int32 fldnsid, uint16 fldsize, uint16 fldprec )
   

   • fldnames - Property name or path
   • typenames - Type name
   • fldnsid - Namespace identification number

     The namespace identification number is an internal number, which can be calculated from a scope path.

   • fldsize - Field size
   • fldprec - Precision for numerical values
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6. Construct by property handle
   DBFieldDef  :: DBFieldDef ( ::Dictionary *dictptr, PropertyHandle &ph, smcb *smcbptr, DBIndex *indexptr, logical domopt, logical logrefr, logical secrefr, logical depopt, NString &extnames, NString &irefname )
   

   • dictptr - Dictionary handle

     An opened dictionary handle is passed.

   • ph - Reference to property handle
   • smcbptr - Pointer to general structure definition

     The smcb is general way to define any type of structure. It contains information for the structure and its properties. The definition does contain only descriptive information (no access information).

   • indexptr - Internal index definition

     Pointer to an internal index definition.

   • domopt - Dominant option
   • logrefr - Logical reference option

     Internal option used to mark a collection as temporary.

   • secrefr - Indicates a secondary reference
   • depopt - Indicates instance dependency

     Dependent instances will be deleted when being removed from a collection

   • extnames - Extent name

     The name contains the name of the extent, only. It does not contain a namespace scope.

     Notes:

     retval checked for const &NString

   • irefname - Inverse reference field name or path

     The inverse reference field name is passed as 0-terminated string.

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