Bug 416703 Mongodb : Display correctly the Number data type
data/org.eclipse.birt.data.oda.mongodb/src/org/eclipse/birt/data/oda/mongodb/internal/impl/MDbMetaData.java
{
                if( flattenableFieldMD.hasChildDocuments() )
                    flattenableFieldMD.getChildMetaData().setFlattenableFields( resultFieldsMD, false );
                return;
            }
 
            
            
            if( m_nestedCollFieldName == null && isTopLevelDoc )
            {
                for( FieldMetaData resultFieldMD : resultFieldsMD.values() ) 
                {
                    if( resultFieldMD.isArrayOfScalarValues() )
                    {
                        m_nestedCollFieldName = resultFieldMD.getFullName();
                        break;
                    }
                }
            }
        }
        public String getFlattenableFieldName()
        {
            return m_nestedCollFieldName;
        }
        /* (non-Javadoc)
         * @see java.lang.Object#toString()
         */
        @Override
        public String toString()
        {