is not allowed under the current SQL conformance level

final static SqlParser.Config SQL_PARSER_CONFIG = SqlParser.configBuilder().setLex(Lex.MYSQL)
            .setConformance(SqlConformanceEnum.MYSQL_5)
            .setCaseSensitive(false).build();

           .setConformance(SqlConformanceEnum.MYSQL_5)

设置对应的Conformance即可