Can't execute a MySQL stored procedure from Java

Question

I am connecting to a MySQL (5.08) database running on a linux machine from a web application running in tomcat.

I get the following exception when I try to execute a stored procedure:

com.hp.hpl.chaos.web.exception.DBException: getNextValue for operatorinstance[Additional Information from SQL Exception][SQLErrorCode: 0 SQLState: S1000
    at com.hp.hpl.chaos.web.util.SQLUtil.getNextValue(SQLUtil.java:207)
        ..............

Caused by: java.sql.SQLException: User does not have access to metadata required to determine stored procedure parameter types. If rights can not be granted, configure connection with "noAccessToProcedureBodies=true" to have driver generate parameters that represent INOUT strings irregardless of actual parameter types.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:910)
at com.mysql.jdbc.DatabaseMetaData.getCallStmtParameterTypes(DatabaseMetaData.java:1619)
at com.mysql.jdbc.DatabaseMetaData.getProcedureColumns(DatabaseMetaData.java:4034)
at com.mysql.jdbc.CallableStatement.determineParameterTypes(CallableStatement.java:709)
at com.mysql.jdbc.CallableStatement.<init>(CallableStatement.java:513)
at com.mysql.jdbc.Connection.parseCallableStatement(Connection.java:4583)
at com.mysql.jdbc.Connection.prepareCall(Connection.java:4657)
at com.mysql.jdbc.Connection.prepareCall(Connection.java:4631)
at com.hp.hpl.chaos.web.util.SQLUtil.getNextValue(SQLUtil.java:196)
... 17 more

After installing mysql on the machine. I have given the follwing grant options to root

mysql> GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'pass';
Query OK, 0 rows affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

In the java class..

I am connecting to the db as follows:

String url = "jdbc:mysql://ipaddress:3306/test";
                con = DriverManager.getConnection(url,"root", "pass");

I have also tried the url with the noAccessToProcedureBodies=true option included.

Can someone tell me what is wrong here? Is there anything I need to check?

Answer 1

There are two ways to solve this:

1. set the connection's noAccessToProcedureBodies=true property

   For example as part of the connection string:

   jdbc:mysql://ipaddress:3306/test?noAccessToProcedureBodies=true
   

   The JDBC driver will then create "INOUT" strings for the arguments without requiring meta data like the exception says.

2. Grant SELECT privileges on mysql.proc to the database user

   For example in the mysql prompt:

   GRANT SELECT ON mysql.proc TO 'user'@'localhost';
   

   Of course this would allow the application to read the entire mysql.proc table that contains information about all stored procedures in all databases (including source code).