drill

83ebf4f3 - DRILL-2463: Implement JDBC mapping of SQL NULL for ResultSet.getXxx() methods.

DRILL-2463: Implement JDBC mapping of SQL NULL for ResultSet.getXxx() methods. - Added test Drill2463GetNullsFailedWithAssertionsBugTest. - Implemented JDBC mapping of NULL for ResultSet.getXxx() methods: - Fixed was-always-false isNull(...) for Nullable... SqlAccessor implementations in SqlAccessors template. - Handled NULL mapping for primitive types in AvaticaDrillSqlAccessor. - Handled NULL mapping for object types in Nullable... SqlAccessor implementations in SqlAccessors template. - Related miscellaneous changes: - Added "rename this" TODO. [config.fmpp] - Added documentation. [SqlAccessor] - Edited comment. [BoundCheckingAccessor]