public final ColPositionContext colPosition() throws RecognitionException {
		ColPositionContext _localctx = new ColPositionContext(_ctx, getState());
		enterRule(_localctx, 168, RULE_colPosition);
		try {
			setState(1591);
			_errHandler.sync(this);
			switch (_input.LA(1)) {
			case FIRST:
				enterOuterAlt(_localctx, 1);
				{
				setState(1588);
				((ColPositionContext)_localctx).position = match(FIRST);
				}
				break;
			case AFTER:
				enterOuterAlt(_localctx, 2);
				{
				setState(1589);
				((ColPositionContext)_localctx).position = match(AFTER);
				setState(1590);
				((ColPositionContext)_localctx).afterCol = errorCapturingIdentifier();
				}
				break;
			default:
				throw new NoViableAltException(this);
			}
		}
		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