.getOwnerDocument(), OdfName.newName(OdfDocumentNamespace.TABLE, "table-column"));
newColumn.setStyleName(columnStylename);
mTableElement.insertBefore(newColumn, positonElement);
} else { // has column, append a same column as the last one.
TableTableColumnElement refColumn = columnList.get(columnList.size() - 1).getOdfElement();
newColumn = (TableTableColumnElement) refColumn.cloneNode(true);
String tableNameSpace = OdfDocumentNamespace.TABLE.getUri();
newColumn.removeAttributeNS(tableNameSpace, "number-columns-repeated");
mTableElement.insertBefore(newColumn, positonElement);
}