public final WhenClauseContext whenClause() throws RecognitionException {
		WhenClauseContext _localctx = new WhenClauseContext(_ctx, getState());
		enterRule(_localctx, 182, RULE_whenClause);
		try {
			enterOuterAlt(_localctx, 1);
			{
			setState(1734);
			match(WHEN);
			setState(1735);
			((WhenClauseContext)_localctx).condition = expression();
			setState(1736);
			match(THEN);
			setState(1737);
			((WhenClauseContext)_localctx).result = expression();
			}
		}
		catch (RecognitionException re) {
			_localctx.exception = re;
			_errHandler.reportError(this, re);
			_errHandler.recover(this, re);
		}
		finally {
			exitRule();
		}
		return _localctx;
	}
When true, the behavior of keywords follows ANSI SQL standard.
amoro-format-mixed/amoro-mixed-spark/v3.3/amoro-mixed-spark-3.3/src/main/gen-antlr/org/apache/amoro/spark/sql/parser/MixedFormatSqlExtendParser.java