org.hsqldb.HsqlException:数据异常:强制转换的字符值无效

Question

我在HSQL数据库中有一个表,它有一个标识(整数)列.我想支持使用任意字符串(可能是非数字)查询列.但是,HSQL JDBC驱动程序尝试将查询参数强制转换为整数并引发异常.Oracle驱动程序似乎很好地支持这种情况.

有什么想改变hsql驱动程序中的这种行为吗？

org.hsqldb:HSQLDB:2.3.0

桌子:

CREATE TABLE some_table(id IDENTITY NOT NULL);

查询:

final String query = "SELECT * FROM some_table WHERE id=?";

String id = "abc";
jdbcTemplate.query(query, new PreparedStatementSetter() {
    @Override
    public void setValues(PreparedStatement ps) throws SQLException {
        ps.setString(1, id);
    }
}, someMapper);

例外:

org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [SELECT * FROM some_table WHERE id=?]; data exception: invalid character value for cast; nested exception is java.sql.SQLDataException: data exception: invalid character value for cast
    at org.springframework.jdbc.support.SQLExceptionSubclassTranslator.doTranslate(SQLExceptionSubclassTranslator.java:80)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
    at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:80)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:605)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:639)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:668)
    .
    .
    .
Caused by: java.sql.SQLDataException: data exception: invalid character value for cast
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCUtil.throwError(Unknown Source)
    at org.hsqldb.jdbc.JDBCPreparedStatement.setParameter(Unknown Source)
    at org.hsqldb.jdbc.JDBCPreparedStatement.setString(Unknown Source)
    at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:135)
    at org.apache.commons.dbcp.DelegatingPreparedStatement.setString(DelegatingPreparedStatement.java:135)
    at com.stackoverflow.SomeDao$2.setValues(SomeDao.java:39)
    at org.springframework.jdbc.core.JdbcTemplate$1.doInPreparedStatement(JdbcTemplate.java:644)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:589)
    ... 33 more
Caused by: org.hsqldb.HsqlException: data exception: invalid character value for cast
    at org.hsqldb.error.Error.error(Unknown Source)
    at org.hsqldb.error.Error.error(Unknown Source)
    at org.hsqldb.Scanner.convertToNumber(Unknown Source)
    at org.hsqldb.types.NumberType.convertToType(Unknown Source)
    ... 40 more

Answer 1

问题来自于尝试将数字列与非数字字符串进行比较.字符串在比较之前转换为数字,并导致抛出异常.

一些解决方法:

• 将字符串更改为long.这不是一个真正的选项,因为非hsql数据源需要支持任意字符串ID.

• dao可以检查String是否为数字,然后才进行查询.这是可以接受的,但我希望不必这样做.