Bug 210620 UNION does not work correctly in Mysql [0703]
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ParameterUtil.java
boolean[] bindingResolved = new boolean[nParams];
		
		 
		for ( int i = 0; i < nParams; i++ )
		{
			IParameterDefinition paramDefn = (IParameterDefinition) paramDefns.get( i );
			paramHints[i] = createParameterHint( paramDefn,
					paramDefn.getDefaultInputValue( ) );
			bindingResolved[i] = false;
			
			
			 
			if ( paramDefn.isInputMode( ) && paramDefn.getName( ) != null )
			{
				Object paramValue = DataSetRuntime.UNSET_VALUE;
				try
				{
					paramValue = this.dsRT.getInputParameterValue( paramDefn.getName( ) );
				}
				catch ( BirtException e )
				{
					
					assert false;
					throw DataException.wrap( e );
				}
				if ( paramValue != DataSetRuntime.UNSET_VALUE )
				{
					String paramValueStr = this.getParameterValueString( paramHints[i].getDataType( ),
							paramValue );