Question

快速提问，为什么我在使用以下代码时会遇到以下异常;

请注意，这是使用Java使用存储过程调用MS SQL Server 2008 R2。

Connection con = getDataSource().getConnection();
CallableStatement cs = con.prepareCall("countrySelect(?)");
cs.setObject(1, "GB");
cs.execute();

结果;

Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near '@P0'.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:197)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1493)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:390)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:340)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:4575)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1400)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:179)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:154)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.execute(SQLServerPreparedStatement.java:322)

这个“@ P0”来自哪里？这是Java内存参考吗？为什么它没有正确转换为SQL类型？

如果可以，我会得到同样的结果;

cs.setString(1, "GB");

存储的Proc代码如下（不是我写的）;

DECLARE @dbid INTEGER;
DECLARE @dbName NVARCHAR(125);
DECLARE @prcName NVARCHAR(125);

SET @dbid = DB_ID();
SET @dbName = DB_NAME();
SET @prcName = 'usp_countrySelect'

IF dbo.ufn_Admin_countryExists(@countryCode) = 1 

   SELECT countryCode
    , countryName
    , nationalVerificationPrice 
    , vatCharged 
    , VATPercentage 
    , sortingPrecedence 
 FROM dbo.country
WHERE countryCode = @countryCode ;

ELSE

RAISERROR  (  N'ERROR: A country with countryCode %s does not exist - proc Name:%s, database ID:%i, the database name is: %s.'
            , 16 -- Severity
            , 1  -- State
            , @countryCode -- First subbed argument
            , @prcName -- Second subbed argument
            , @dbid -- Third subbed argument
            , @dbName -- Fourth subbed argument
       );

END

Answer 1

想出来，如果你问我，那么对于一个不显眼的问题就是错误的错误;

CallableStatement cs = con.prepareCall("countrySelect(?)");

不起作用，而是使用;

CallableStatement cs = con.prepareCall("{call countrySelect(?)}");

区别在于“call”和括号{}括号。

使用CallableStatement.setObject（int，Object）时是否有SQLServerException？

1 个答案: