private boolean identifier_sempred(IdentifierContext _localctx, int predIndex) {
		switch (predIndex) {
		case 16:
			return !SQL_standard_keyword_behavior;
		}
		return true;
	}
When true, the behavior of keywords follows ANSI SQL standard.
amoro-format-mixed/amoro-mixed-spark/v3.5/amoro-mixed-spark-3.5/src/main/gen-antlr/org/apache/amoro/spark/sql/parser/MixedFormatSqlExtendParser.java