RelationOptionalFactory result = invokerAssistant.assistRelationOptionalFactory();
        assertNull(result);
    }

    // Test assistSqlAnalyzerFactory
    public void test_assistSqlAnalyzerFactory() {
        SqlAnalyzerFactory result = invokerAssistant.assistSqlAnalyzerFactory();
        assertNull(result);
    }

    // Test assistFirstOutsideSqlOption with null table name

    @Override
    public RelationOptionalFactory assistRelationOptionalFactory() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public SqlAnalyzerFactory assistSqlAnalyzerFactory() {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    public OutsideSqlOption assistFirstOutsideSqlOption(final String tableDbName) {