更新查询information_schema columns 部分数据类型由int32变更为int64 #2
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Description
原因： 当模型表中string 类型未定义长度时，information_schema 库中 COLUMNS表中CHARACTER_MAXIMUM_LENGTH 长度是一个很大的int64值，而在代码中schema 对应的定义成int32，会存在类型转换不通过的问题
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