Dynamic SQL Report

Question

Hi everybody
I want to build a dynamqi sql query to use in a report. What is dynamic is the name of the table I want to request. I have a nice item named P8-ECHELLE, a select List with a LOV returning a part of the name.
For example the select list returns "E034". I want to add this part of the name to the beginning of the name of the table which is "EVV_" in order to get the name of the table which would be "EVV_E034'.
The select would like this : SELECT * FROM SIVOA.EVV_E034
This is the code :
DECLARE
x VARCHAR2 (4000);
BEGIN
x := 'SELECT * FROM SIVOA.EVV_' || :P8_ECHELLE ;
RETURN (x);
END;
I get an error : "failed to parse SQL query: ORA-00942: table or view does not exist"
Coudl you help ?
Christian
PS : thank to D. Kubicek for his example !

Answer 1

This is the code.
DECLARE
x VARCHAR2 (4000);
BEGIN
x :=
'SELECT * '
|| 'FROM EMP '
|| 'WHERE 1=1 '
|| CASE
WHEN :p184_ename IS NOT NULL
THEN 'AND UPPER(ename) LIKE '''
|| UPPER (:p184_ename)
|| '''||''%'' '
ELSE NULL
END
|| CASE
WHEN :p184_deptno IS NOT NULL
THEN 'AND INSTR('':''||'
|| ''''
|| :p184_deptno
|| ''''
|| '||'':'', '':''||deptno||'':'') > 0'
ELSE NULL
END;
RETURN (x);
END;