MySQL嘗試創建具有大整數的臨時表失敗

Question

我試圖創建一個臨時表，將原始表中的char（10）數字tkey存儲爲無符號整數。 當它遇到109516列。這將失敗：

 
mysql> CREATE TEMPORARY TABLE IF NOT EXISTS lutemp AS (SELECT cast(tkey as unsigned),ca01,ce01 FROM lu); 
ERROR 1264 (22003): Out of range value for column 'cast(tkey as unsigned)' at row 109516 

但如果我選擇該行作爲轉換成integer，它有沒有問題，這樣做：

 
mysql> select cast(tkey as unsigned) from lu limit 109515,1; 


+--------------------------+ 
| cast(tkey as unsigned) | 
+--------------------------+ 
|    4298001000 | 

+--------------------------+ 
1 rows in set (0.10 sec) 

我在做什麼錯？

Answer 1

不要依靠數據庫給 。

最大價值UNSIGNED INT是

4,294,967,295 

看到here。你的價值是

4,298,001,000 

嘗試使用BIGINT UNSIGNED明確：

CREATE TEMPORARY TABLE IF NOT EXISTS lutemp 
(SELECT tkey, ca01,ce01 FROM lu LIMIT 0); 

ALTER TABLE lutemp MODIFY tkey BIGINT UNSIGNED; 

INSERT INTO lutemp (tkey, ca01,ce01) 
SELECT tkey, ca01,ce01 FROM lu 
;