java data_error ai_generated true

java.sql.DataTruncation: 列'X'上的数据截断

java.sql.DataTruncation: Data truncation on column 'X'

ID: java/sql-data-truncation

其他格式: JSON · Markdown 中文 · English
85%修复率
85%置信度
1证据数
2023-01-15首次发现

版本兼容性

版本状态引入弃用备注
Java 8 active — — —
Java 11 active — — —
Java 17 active — — —
MySQL Connector/J 8.0 active — — —
PostgreSQL JDBC 42.5 active — — —
H2 2.1 active — — —

根因分析

DataTruncation 发生在 JDBC 驱动程序尝试插入或更新超过数据库模式中列定义长度或精度的值时。

English

DataTruncation occurs when a JDBC driver attempts to insert or update a value that exceeds the column's defined length or precision in the database schema.

generic

官方文档

https://docs.oracle.com/javase/8/docs/api/java/sql/DataTruncation.html

解决方案

  1. Validate and truncate the data in Java code before insertion. For example: if (value.length() > columnMaxLength) { value = value.substring(0, columnMaxLength); }
  2. Increase the column size in the database schema using ALTER TABLE: ALTER TABLE my_table MODIFY COLUMN my_column VARCHAR(500); and ensure application logic respects the new limit.

无效尝试

常见但无效的做法:

  1. 40% 失败

    Increases database storage and may allow invalid data, but truncation can still occur if the new limit is again exceeded.

  2. 60% 失败

    Does not address the actual data size mismatch; the truncation still happens at the database level.