private void displayTableColumns(String tableName){
try {
DefaultTableModel columnsModel = (DefaultTableModel)gKarTable1.getTable().getModel();
int columnCount = columnsModel.getRowCount();
for(int i=0;i<columnCount;i++){
columnsModel.removeRow(0);
}
int i=0;
ResultSet res = oraConn.executeStatement("select a.*,b.comments from user_tab_columns a, user_col_comments b where a.table_name='"+tableName+"' and a.table_name=b.table_name(+) and a.column_name=b.column_name(+) order by a.column_id");
while(res.next()){
Vector row = new Vector();