code: Boolean isColStClsSupported() {
  
          return ValuePool.getBoolean(type == Types.SQL_ALL_TYPES ? true
                                                         : getColStClsName()
                                                         != null);
      }
docs: Retrieves whether, under the current release, class path and hosting
  JVM, HSQLDB supports storing this type in table columns. <p>
  
  This value also typically represents whether HSQLDB supports retrieving
  values of this type in the columns of ResultSets.
  @return whether, under the current release, class path
  and hosting JVM, HSQLDB supports storing this
  type in table columns