Target charset should be used when comparing two strings through CONVERT/TRANSLATE function during validation

CalciteAssert.hr()
        .query("select \"name\", \"empid\" from \"hr\".\"emps\"\n"
            + "where convert('a' using GBK)=_GBK'a' order by \"empid\"")
        .returns("name=Eric; empid=200\n"
            + "name=Sebastian; empid=150\n"
            + "name=Theodore; empid=110\n"
            + "name=Bill; empid=100\n");