A base class of a database-related data provider for report generators.
TRVReportDBDataProvider = class (TRVReportDataProvider)
This is a parent class for data providers components which uses TDataSet to process data queries. A typical data query is SQL SELECT statement.
A data provider receives data query strings from TRVReportGenerator components, and creates TRVReportDBQueryProcessor objects to handle them. Normally, this process is invisible for you, TRVReportDBQueryProcessor is used internally.