MySQLdb,写入表时，出现的 1265, "Data truncated for column"告警，如何精准捕捉原数据内容？

C:\Users\Administrator\venv\lib\site-packages\pymysql\cursors.py:170: Warning: (1265, "Data truncated for column '前百分比' at row 1")
  result = self._query(query)
C:\Users\Administrator\venv\lib\site-packages\pymysql\cursors.py:170: Warning: (1265, "Data truncated for column '后百分比' at row 1")
  result = self._query(query)
C:\Users\Administrator\venv\lib\site-packages\pymysql\cursors.py:170: Warning: (1265, "Data truncated for column '现百分比' at row 1")
  result = self._query(query)

数据来源杂，量大，而且写入是多线程，
1265 这种告警，又并非是一种异常错误，用 try,except,print 大法也无法捞出具体是怎么样的数据被自动切长短，
尽管表的字段长度都调过了进行适配，依然会偶然跳一下 1265 告警，于是只能怀疑数据来源处理得有些不干净，
又不好定位是什么原因。。。

        from dbutils.pooled_db import PooledDB
        POOL = PooledDB(xxx)
        DBconn = POOL.connection()
        cur = DBconn.cursor()
        cur.execute(sqlcmdtext)
        cur.close()
        DBconn.close()