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I have a query as below:

SELECT COL1, COL2 FROM SCHEM1.TAB1 WHERE COL3=? AND COL4=?

I am executing above query in my java class as:

List<Map<String, Object>> resultList = jdbcTemplate.queryForList(sql, (Object[]) queryParams);

Issue is I am getting queryParams at runtime from a text properties file as below:

2013-03-28||helloWorld

As seen in above line, the properties file has arguments to a sql. All arguments are delimited by a double pipe.

I am reading this line into a String[] by using the split method on the pipe delimiter.

So my resultant queryParams String array would be:

String[] queryParams where String[0] would be 2013-03-28 and String[1] would be helloWorld

When I am passing this String[] directly to templates queryForList method by casting it as Object[] as mentioned at the start of this post, and when my log4j is set to debug mode, I am getting termination on the following error:

Exception in thread "main" java.lang.Error: SQLWarning chain holds value that is not a SQLWarning
at java.sql.SQLWarning.getNextWarning(SQLWarning.java:91)
at org.springframework.jdbc.core.JdbcTemplate.handleWarnings(JdbcTemplate.java:1260)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:587)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:636)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:665)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:673)
at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:713)
at org.springframework.jdbc.core.JdbcTemplate.queryForList(JdbcTemplate.java:796)
at com.hsbc.pb.it.re.db.dao.impl.ReconDaoImplNew.getColumnList(MyClass.java:362)

A line just above this error in the console mentions:

SQLWarning ignored: SQL state 'null', error code '0', message [Input data type mismatch, see chained exceptions; will retry execution using describe input information.  Please change application to use an input data type that matches the database column type as required by JDBC semantics.]

However, this code works correctly when I am setting the log4j level to info.

What is the cause of this termination ?

How to resolve it ?

Is it to do with parameter type (as in, I am passing String to queryForList when the expected column is Date) ? If so, how can I correctly format a String to expected type before passing to queryForList method ?

I can change the properties file to something like:

2013-06-28,DATE||helloWorld,VARCHAR

Where information on the type of the value is also passed along. But using this info, how can I convert the String to given type -- Is such approach a nice solution ?

Why the error is not coming when log4j is in info mode ?

Thanks for reading!

Please let me know if any details are missing.

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1 回答 1

0

这2013-06-28,DATE||helloWorld,VARCHAR是一个好方法

您可以制作一些处理程序来解析它，例如：

Map<String,IConvert> converts =  new HashMap<String, IConvert>(){
    put("varchar",new StringConver());
    put("date",new DateConver());
}
//then
converts.get(type).toParam(string)

我猜为什么当 log4j 处于信息模式时错误没有出现，错误随之而来debug mode！当您将 setString() 设置为日期类型时，jdbcDriver 不会抛出异常，但会返回类似“代码：1292 SQL 状态：HY000 --- 日期值不正确”之类的警告，也许 dbcTemplate 使用调试模式来处理它。

于 2014-01-24T09:29:58.670 回答