达梦数据库触发器begin报错

达梦数据库建立了如下触发器

CREATE
	TRIGGER HLHTMD_QY_ORG BEFORE UPDATE
		OF STATE ON
		IPSBTQY FOR EACH ROW
		WHEN(NEW.STATE = '2')
	BEGIN
		IF EXISTS (
			SELECT *
		FROM
			MD_QY_ORG
		WHERE
			CODE = NEW.CODE)
	   BEGIN --------报错位置
		UPDATE
			MD_QY_ORG
		SET
			NAME = NEW.NAME,
			UNITCODE = NEW.UNITCODE,
			SHORTNAME = NEW.SHORTNAME,
			STOPFLAG = NEW.STOPFLAG,
			PARENTCODE = NEW.PARENTCODE,
			HRID = NEW.HRID,
			COMPANYTYPE = NEW.COMPANYTYPE,
			LEGALPERSON = NEW.LEGALPERSON,
			REGISTERCAPITAL = NEW.REGISTERCAPITAL,
			SETUPDATE = NEW.SETUPDATE,
			BUSINESSTIMEFROM = NEW.BUSINESSTIMEFROM,
			BUSINESSTIMETO = NEW.BUSINESSTIMETO,
			CONTINENT = NEW.CONTINENT,
			CONTRY = NEW.CONTRY,
			CITYCODE = NEW.CITYCODE,
			ADDRESS = NEW.ADDRESS,
			SCBZ = '0'
		WHERE
			CODE = NEW.CODE
		END
		ELSE
	BEGIN
		INSERT
			INTO
				MD_QY_ORG SELECT
					a.ID,
					a.IPSBTQY_JGDM,
					a.IPSBTQY_BTGS,
					'',
					'',
					a.IPSBTQY_C0,
					'0',
					e.CREDIT_CODE,
					a.UNIQUE_ID,
					(CASE
						a.IPSBTQY_XZ
						WHEN 'ET_CG' THEN '国有参股企业'
						WHEN 'ET_DZ' THEN '国有独资企业'
						WHEN 'ET_JQKG' THEN '国有控股企业'
						WHEN 'ET_QZ' THEN '国有全资企业'
						WHEN 'ET_SJKZ' THEN '国有实际控制企业'
						WHEN 'ET_QT' THEN '其他'
						WHEN 'ET_SY' THEN '事业单位'
					END),
					a.IPSBTQY_FR,
					a.IPSBTQY_ZTZE,
					a.IPSBTQY_DJRQ,
					a.BUSINESS_TERM_START,
					a.BUSINESS_TERM_END,
					(CASE
						a.IPSBTQY_C5
						WHEN 'WC_YZ' THEN '亚洲'
						WHEN 'WC_OZ' THEN '欧洲'
						WHEN 'WC_FZ' THEN '非洲'
						WHEN 'WC_BMZ' THEN '北美洲'
						WHEN 'WC_NMZ' THEN '南美洲'
						WHEN 'WC_DYZ' THEN '大洋洲'
						WHEN 'WC_NJZ' THEN '南极洲'
					END),
					b.NAME_CHS,
					c.CODE,
					a.IPSBTQY_C29,
					0
				FROM
					IPSBTQY a
				LEFT JOIN BFNATIONALANDREGIONALDICT b ON
					a.IPSBTQY_C6 = b.id
				LEFT JOIN BFADMINDIVISION c ON
					a.IPSBTQY_C7 = c.id
				LEFT JOIN IPSCOMPANYDICT e ON
					a.MANAGE_COMPANY = e.ID
				WHERE
					a.ID = old.ID;
END
END

执行时报错位置的begin附近有错误，是哪里有问题呢