IIB: Passing local variable to ESQL select statement

问题

I need to retrieve datas from two tables based on the Job code which is given in the input xml in IIB/WMB.

SQL Query

SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM DEPT D JOIN EMP E on E.JOB ='MANAGER' OR E.JOB = 'CLERK'

ESQL Query

Getting the JOB details from input xml and assigning it to local variable.

SET type1 = InputRoot.XMLNSC.Employee.Type[1];
SET type2 = InputRoot.XMLNSC.Employee.Type[2];

Now I need to pass the above variables to my ESQL query.

SET Outputroot.XMLNSC.List[] = PASSTHRU('SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM Database.EMP AS E,Database.DEPT AS D where E.JOB =?' VALUES('type1','type2')) ;

But the above query is not working.

回答1:

There are two problems in this query:

First, you are passing two parameters but only one question mark (?) exists in the query.

Second, you are passing a string value like 'type1' and the correct is to pass the variable:

SET Outputroot.XMLNSC.List[] = PASSTHRU('SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM Database.EMP AS E,Database.DEPT AS D where E.JOB =?' VALUES(type1)) ;

回答2:

Here is the solution:

    DECLARE designation char;
       DECLARE designation1 char;
       DECLARE Query char;



      FOR source AS InputRoot.XMLNSC.Employees.Designation[]  DO
                IF(source = '') THEN
                    SET designation = 'Empty';
                ELSE        
                    SET designation = designation1 ||''''||UPPER(source)||'''';                     
                SET designation1 = ''''||UPPER(source)||''''||','||designation1 ;

            END IF;      


SET Query = '(SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM EMP AS E JOIN DEPT AS D on D.DEPTNO = E.DEPTNO where E.JOB in ('||designation||'))';

SET Outputroot.XMLNSC.List[] = PASSTHRU(Query);

回答3:

The passthru call should be

SET Outputroot.XMLNSC.List[] = PASSTHRU('SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM Database.EMP AS E,Database.DEPT AS D where E.JOB in (? , ?)', type1,type2) ;

SET Outputroot.XMLNSC.List[] = PASSTHRU('SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM Database.EMP AS E,Database.DEPT AS D where E.JOB=? or E.JOB=?)', type1,type2) ;

回答4:

Add To Database.DBName after your PASSTHRU statement where DBName is your database name

Like this:

SET Outputroot.XMLNSC.List[] = PASSTHRU('SELECT D.DEPTNO,D.DNAME,D.LOC,E.EMPNO,E.ENAME,E.JOB,E.SAL FROM Database.EMP AS E,Database.DEPT AS D where E.JOB =?' VALUES(type1)) To Database.DBName ;

来源：https://stackoverflow.com/questions/43114965/iib-passing-local-variable-to-esql-select-statement

标签

ibm-integration-bus

extended-sql