public final BucketSpecContext bucketSpec() throws RecognitionException {
		BucketSpecContext _localctx = new BucketSpecContext(_ctx, getState());
		enterRule(_localctx, 10, RULE_bucketSpec);
		int _la;
		try {
			enterOuterAlt(_localctx, 1);
			{
			setState(272);
			match(CLUSTERED);
			setState(273);
			match(BY);
			setState(274);
			identifierList();
			setState(278);
			_errHandler.sync(this);
			_la = _input.LA(1);
			if (_la==SORTED) {
				{
				setState(275);
				match(SORTED);
				setState(276);
				match(BY);
				setState(277);
				orderedIdentifierList();
				}
			}

			setState(280);
			match(INTO);
			setState(281);
			match(INTEGER_VALUE);
			setState(282);
			match(BUCKETS);
			}
		}
		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/v3.2/amoro-mixed-spark-3.2/src/main/gen-antlr/org/apache/amoro/spark/sql/parser/MixedFormatSqlExtendParser.java