怎么突破sqlldr的char类型的长度限制

用sqlload倒数据,发现sqlldr里char类型的长度限制为255,但是我很多要导入的字段都超过了255,请问怎么突破这个限制,急。并请举例说明一下,谢谢~~
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fields terminated by ','
TRAILING NULLCOLS
(ID,name char(100000000),score)

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