code: private void dropColumn(CmsSetupDb dbCon, String tablename, String column) throws SQLException {
  
          System.out.println(new Exception().getStackTrace()[0].toString());
          if (dbCon.hasTableOrColumn(tablename, column)) {
              String query = readQuery(QUERY_DROP_COLUMN);
              Map<String, String> replacer = new HashMap<String, String>();
              replacer.put(REPLACEMENT_TABLENAME, tablename);
              replacer.put(REPLACEMENT_COLUMN, column);
              dbCon.updateSqlStatement(query, replacer, null);
          } else {
              System.out.println("column " + column + " in table " + tablename + " does not exist");
          }
      }
docs: Drops the column of the given table.<p>
  
  @param dbCon the db connection interface
  @param tablename the table in which the columns shall be dropped
  @param column the column to drop
  
  @throws SQLException if something goes wrong