Question

I need help. I have a problem in constructing my PL/SQL block.
In the cursor, I have a query constructed, and i want to insert a filter on cursor. Below is an example:

DECLARE 
code NUMBER;
parameters_amb myOthertable%ROWTYPE;

CURSOR test is SELECT id from mytable
 if parameters_amb.test2 is not null  then
    where mytable.name = 'NAMETABLE'
 else
    where mytable.name = 'NAMETABLE2';

Can anyone assist me in this construction?

Answer 1

You can try it like this:

DECLARE  
  code NUMBER; 
  parameters_amb myOthertable%ROWTYPE;  
  CURSOR test is SELECT id 
                 from mytable  
                 WHERE (parameters_amb.test2 is not null AND mytable.name = 'NAMETABLE' )
                   OR (parameters_amb.test2 is null AND mytable.name = 'NAMETABLE2' );

Or like this:

DECLARE  
  code NUMBER; 
  parameters_amb myOthertable%ROWTYPE;  
  CURSOR test is SELECT id 
                 from mytable  
                 WHERE mytable.name = 
                       CASE WHEN parameters_amb.test2 is not null THEN 'NAMETABLE'
                            WHEN parameters_amb.test2 is null THEN 'NAMETABLE2' END