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From "Knut Anders Hatlen (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-501) Client and embedded drivers differ on invoking a procedure that returns a single Dynamic resultSet using CallableStatement.executeQuery()
Date Fri, 26 May 2006 09:15:30 GMT
     [ http://issues.apache.org/jira/browse/DERBY-501?page=all ]

Knut Anders Hatlen updated DERBY-501:
-------------------------------------

    Attachment: derby-501-v1.diff
                derby-501-v1.stat

It turns out that the issue can be fixed just by not throwing the
exception when exactly one result set is produced by the stored
procedure. EmbedStatement.executeStatement() will do the right thing
if the exception is not raised.

The attached patch fixes it by counting the number of returned result
sets and raising an exception if it is not one. It also adds a new
test, jdbcapi/ProcedureTest.junit, which tests executeQuery() with
stored procedures in Statement, PreparedStatement and
CallableStatement.

Derbyall ran successfully. The patch is ready for review. Thanks.

> Client and embedded drivers differ on invoking a procedure that returns a single Dynamic
resultSet using CallableStatement.executeQuery()
> -----------------------------------------------------------------------------------------------------------------------------------------
>
>          Key: DERBY-501
>          URL: http://issues.apache.org/jira/browse/DERBY-501
>      Project: Derby
>         Type: Bug

>   Components: JDBC
>     Versions: 10.1.1.0, 10.0.2.1
>  Environment: All Platforms
>     Reporter: Satheesh Bandaram
>     Assignee: Knut Anders Hatlen
>  Attachments: Test.java, Test1.java, derby-501-v1.diff, derby-501-v1.stat
>
> It is possible to invoke a stored procedure that returns a single dynamic result using
CallableStatement.executeQuery using Derby Client. The embedded JDBC driver, however, throws
an exception like:
> Test starting ...url = jdbc:derby:tdb
> Exception in thread "main" ERROR X0Y78: Statement.executeQuery() cannot be called with
a statement that returns a row count.
>         at org.apache.derby.iapi.error.StandardException.newException(StandardException.java:301)
>         at org.apache.derby.impl.sql.GenericPreparedStatement.execute(GenericPreparedStatement.java:434)
>         at org.apache.derby.impl.jdbc.EmbedStatement.executeStatement(EmbedStatement.java:1142)
>         at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeStatement(EmbedPreparedStatement.java:1323)
>         at org.apache.derby.impl.jdbc.EmbedCallableStatement.executeStatement(EmbedCallableStatement.java:109)
>         at org.apache.derby.impl.jdbc.EmbedPreparedStatement.executeQuery(EmbedPreparedStatement.java:241)
>         at Test1.main(Test1.java:26)
> I think the embedded driver behavior is incorrect here, though I would double check that
the JDBC spec says. 
> To reproduce the problem,
> 1) Create a database called 'tdb' and a table called COMPANY as create table COMPANY(name
char(10));
> 2) Insert two rows as: insert into COMPANY values 'IBM', 'SUN';
> 3) register a procedure as:
> CREATE PROCEDURE GETALLCOMPANIES() PARAMETER STYLE JAVA LANGUAGE JAVA READS SQL DATA
DYNAMIC RESULT SETS 1 EXTERNAL NAME 'Test.getAllCompanies'
> 4) Set server classpath
> 5) Compile two attached java programs, Test and Test1
> 6) Execute 'java Test1 1' to run as a client program and 'java Test1 2' to run as an
embedded program.

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