Public Member Functions

OGRFeatureQuery Class Reference

List of all members.

Public Member Functions

char ** GetUsedFields ()

Member Function Documentation

char ** OGRFeatureQuery::GetUsedFields (  ) 

Returns lists of fields in expression.

All attribute fields are used in the expression of this feature query are returned as a StringList of field names. This function would primarily be used within drivers to recognise special case conditions depending only on attribute fields that can be very efficiently fetched.

NOTE: If any fields in the expression are from tables other than the primary table then NULL is returned indicating an error. In succesful use, no non-empty expression should return an empty list.

Returns:
list of field names. Free list with CSLDestroy() when no longer required.

The documentation for this class was generated from the following files:

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