但是DataWorks这个文本格式转换成时间格式不就是 DATETIME 么？是不是这个原因wa

但是DataWorks这个文本格式转换成时间格式不就是 DATETIME 么？是不是这个原因warning:[52,38] unnecessary CAST, source and destination type are both DATETIMEWARNING:[102,37] implicit conversion from STRING to DOUBLE, potential data loss, use CAST function to suppressWARNING:[106,55] implicit conversion from STRING to DATETIME, potential runtime error, use CAST function to suppressWARNING:[122,35] unnecessary CAST, source and destination type are both DATETIMEWARNING:[122,55] implicit conversion from STRING to DATETIME, potential runtime error, use CAST function to suppress