Support of stored procedure

Due to a cooperation with Andrei Semak, in provider the code for operation with stored procedures was realized. For it in provider were realized:

• Out-parameters
• Getting of the descriptions of Out-parameters
• Translation of non-standard inquiries on execution of stored procedures from «exec proc_name» and «execute proc_name» into IB SQL — «execute procedure proc_name»

Feature of implementation of out-parameters is the possibility of it partial enumeration. In case ADO it is possible to define only first out-parameters, for operation through OLE DB can define names of required out-parameters. In the second case provider takes into account existence of quoted identifier of the third dialect IB6. The In-parameters should be defined completely. Before execution of inquiry provider checks up the transmitted information on parameters and returns the detailed descriptions of the found errors.