public final CreateTableHeaderContext createTableHeader() throws RecognitionException {
		CreateTableHeaderContext _localctx = new CreateTableHeaderContext(_ctx, getState());
		enterRule(_localctx, 4, RULE_createTableHeader);
		int _la;
		try {
			enterOuterAlt(_localctx, 1);
			{
			setState(242);
			match(CREATE);
			setState(244);
			_errHandler.sync(this);
			_la = _input.LA(1);
			if (_la==TEMPORARY) {
				{
				setState(243);
				match(TEMPORARY);
				}
			}

			setState(247);
			_errHandler.sync(this);
			_la = _input.LA(1);
			if (_la==EXTERNAL) {
				{
				setState(246);
				match(EXTERNAL);
				}
			}

			setState(249);
			match(TABLE);
			setState(253);
			_errHandler.sync(this);
			switch ( getInterpreter().adaptivePredict(_input,8,_ctx) ) {
			case 1:
				{
				setState(250);
				match(IF);
				setState(251);
				match(NOT);
				setState(252);
				match(EXISTS);
				}
				break;
			}
			setState(255);
			multipartIdentifier();
			}
		}
		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