docs: protected void appendWhereClause(StringBuffer stmt, Object[] columns)
      {
          stmt.append(" WHERE ");
  
          for (int i = 0; i < columns.length; i++)
          {
              if (i > 0)
              {
                  stmt.append(" AND ");
              }
              stmt.append(columns[i]);
              stmt.append("=?");
          }
      }