code: @Override
     public ValidationErrors validate(final CreateSpatialIndexStatement statement,
           final Database database, final SqlGeneratorChain sqlGeneratorChain) {
        final ValidationErrors validationErrors = super.validate(statement, database,
              sqlGeneratorChain);
        validationErrors.checkRequiredField("srid", statement.getSrid());
        return validationErrors;
     }
docs: {@inheritDoc} Also ensures that the SRID is populated.