public final ComplexColTypeContext complexColType() throws RecognitionException {
		ComplexColTypeContext _localctx = new ComplexColTypeContext(_ctx, getState());
		enterRule(_localctx, 180, RULE_complexColType);
		int _la;
		try {
			enterOuterAlt(_localctx, 1);
			{
			setState(1722);
			identifier();
			setState(1724);
			_errHandler.sync(this);
			switch ( getInterpreter().adaptivePredict(_input,234,_ctx) ) {
			case 1:
				{
				setState(1723);
				match(COLON);
				}
				break;
			}
			setState(1726);
			dataType();
			setState(1729);
			_errHandler.sync(this);
			_la = _input.LA(1);
			if (_la==NOT) {
				{
				setState(1727);
				match(NOT);
				setState(1728);
				match(NULL);
				}
			}

			setState(1732);
			_errHandler.sync(this);
			_la = _input.LA(1);
			if (_la==COMMENT) {
				{
				setState(1731);
				commentSpec();
				}
			}

			}
		}
		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