Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
if ( modelDataType
				.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_STRING ) )
			return DataType.STRING_TYPE;
		if ( modelDataType
				.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_DATETIME ) )
			return DataType.DATE_TYPE;
		if ( modelDataType
				.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_DECIMAL ) )
			return DataType.DECIMAL_TYPE;
		if ( modelDataType
				.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_FLOAT ) )
			return DataType.DOUBLE_TYPE;
		
		if ( modelDataType
				.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_STRUCTURE )
				|| modelDataType
						.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_TABLE ) )
		{
			assert false;
		}
		return DataType.UNKNOWN_TYPE;
	}
	
	public static int toDteFilterOperator( String modelOpr )
	{
		if ( modelOpr.equals( DesignChoiceConstants.FILTER_OPERATOR_EQ ) )
			return IConditionalExpression.OP_EQ;
		if ( modelOpr.equals( DesignChoiceConstants.FILTER_OPERATOR_NE ) )
			return IConditionalExpression.OP_NE;
		if ( modelOpr.equals( DesignChoiceConstants.FILTER_OPERATOR_LT ) )