1. implemented TOracleServer::GetColumns() using occi
MetaData instead of original SQL select statement. This
implementation works for any Oracle 10 databases without
constraints on user granted priveleges.

2. implemented TOracleServer::GetTables(). The TSQLServer::GetTables()
is MySQL oriented. In Oracle, table is accessed in "schema.table" format.
The implementation handles two cases: with and without schema name.
The return value conforms TSQL spec, i.e. a TSQLResult pointer.

3. fixed a critical bug in TOracleResult::Next().


git-svn-id: http://root.cern.ch/svn/root/trunk@11214 27541ba8-7e3a-0410-8455-c3a389f83636