I have trouble executing the following using a JDBC prepared statement:
CREATE OR REPLACE TRIGGER Time_trg BEFORE INSERT ON Time FOR EACH ROW
BEGIN
SELECT Time_seq.NEXTVAL INTO :new.id FROM dual;
END;
The code:
try {
PreparedStatement statement = connection.prepareStatement( sql );
preparedStatement.executeUpdate();
} finally {
statement.close();
}
I'm getting this error:
java.sql.SQLException: Missing IN or OUT parameter at index:: 1
I'm working on a database agnostic solution so I need something that is portable. So what is oracle's problem?
There is no need to write our own stored procedure to do this. Oracle provides a built-in stored procedure we can use: DBMS_UTILITY.EXEC_DDL_STATEMENT :
DBMS_UTILITY.EXEC_DDL_STATEMENT('create table t1 (id number)');
In fact this is safer than the workaround procedure suggested in the accepted answer as it doesn't allow the execution of DML and so is protected against SQL injection
Use oracle.jdbc.OraclePreparedStatement
OraclePreparedStatement statement = (OraclePreparedStatement)connection.prepareStatement( sql );
As this is much specific to Oracle, regular PrepareStatement
doesn't help. Oracle provides a wrapper for the same, with additional functionalities as well.
Similarly, Oracle provides OracleCallableStatement
similar to CallableStatement
WorkAround: (When PreparedStatement has to be used - Risk of being misused
CREATE PROCEDURE EXECUTE_MY_DDL(INSTRING VARCHAR2)
AS
BEGIN
EXECUTE IMMEDIATE INSTRING;
END;
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