目前manager应该是没有支持这个

手动新增一列字段把，手动调整。
假设c1列是大字段列
select c1,c1::varchar(8000) from xxx

具体效果类似

clobAsString =1 ，配置链接传的时候，加上这个参数

CREATE TABLE DZD (ID INT,B1 BLOB,C1 CLOB);

INSERT INTO TEST.DZD VALUES (1,'ABCDEF','MAKDJIDIJFIJDIJIENG');
INSERT INTO TEST.DZD VALUES (2,'BCDEF','NGJDJIEJIJFIJEWNAAS');
INSERT INTO TEST.DZD VALUES (3,'CDEF','JMEIGNABEIJGIIANAI');

SELECT * FROM TEST.DZD;

SELECT C1::VARCHAR,* FROM TEST.DZD;

--或者

DBMS_LOB.SUBSTR(BLOB/CLOB/TEXT)
SELECT ID,DBMS_LOB.SUBSTR(B1),DBMS_LOB.SUBSTR(C1) FROM TEST.DZD;