Java .nextval JDBC 插入问题
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.nextval JDBC insert problem
提问by jasonfungsing
I try to insert into table with sequence .nextval as primary key, the sql in Java is
我尝试以序列 .nextval 作为主键插入到表中，Java 中的 sql 是
sql = "INSERT INTO USER
(USER_PK, ACCOUNTNUMBER, FIRSTNAME, LASTNAME, EMAIL )
VALUES
(?,?,?,?,?)";
ps = conn.prepareStatement(sql);
ps.setString(1, "User.nextval");
ps.setString(2, accountNumber);
ps.setString(3, firstName);
ps.setString(4, lastName);
ps.setString(5, email);
However, the error is ORA-01722: invalid number
但是，错误是 ORA-01722: invalid number
All the other fields are correct, I think it is the problem of sequence, is this correct?
其他字段都对，我觉得是顺序的问题，对吗？
采纳答案by OMG Ponies
The problem is that the first column is a numeric data type, but your prepared statement is submitting a string/VARCHAR data type. The statement is run as-is, there's no opportunity for Oracle to convert your use of nextval to get the sequence value.
问题是第一列是数字数据类型，但您准备好的语句提交的是字符串/VARCHAR 数据类型。该语句按原样运行，Oracle 没有机会转换您对 nextval 的使用来获取序列值。
Here's an alternative via Java's PreparedStatement syntax:
这是通过 Java 的 PreparedStatement 语法的替代方法：
sql = "INSERT INTO USER
(USER_PK, ACCOUNTNUMBER, FIRSTNAME, LASTNAME, EMAIL )
VALUES
(user.nextval, ?, ?, ?, ?)";
ps = conn.prepareStatement(sql);
ps.setString(1, accountNumber);
ps.setString(2, firstName);
ps.setString(3, lastName);
ps.setString(4, email);
This assumes that useris an existing sequence -- change to suit.
这假定这user是一个现有的序列 - 更改以适应。
