pingcap / pingcap/tidb

Able to set AUTO_INCREMENT to a value larger than maximum value of int

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#56,034 10 comments 0 reactions 2 assignees Claimed by @takaidohigasi View on GitHub
component/ddl good first issue severity/moderate type/bug
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Description

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)
1. create a table with auto increment, and set AUTO_INCREMENT=2147483648, while max value for int is 2147483647 (https://docs.pingcap.com/tidb/stable/data-type-numeric#integer-type)
2. insert into the value using auto increment
```
mysql> create table t1 (a int auto_increment) AUTO_INCREMENT=2147483648;
Query OK, 0 rows affected (0.07 sec)

mysql> insert into t1 values ();
ERROR 1690 (22003): constant 2147483648 overflows int

```

### 2. What did you expect to see? (Required)
Create table should fail or user should be notified/warned in this case.

### 3. What did you see instead (Required)
Create table is OK, but later insert fails.

### 4. What is your TiDB version? (Required)
v8.4.0-alpha
Edition: Community
Git Commit Hash: f9c4773ba34854cec93dec3c5cae8a625925f9e9
Git Branch: heads/refs/tags/v8.4.0-alpha

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