Dynamically defining a cursor statement

Question

I was hoping to find help with coding a dynamically defined cursor statement, as some of the tables in the 'FROM' clause of the cursor definition are not known until runtime. Thanks in advance for your help!
Cheers,
Vladimir

Answer 1

Hi,
I think Your problem can be solved
using REF cursors which are defined
within the Begin block rather than
the Declare block. See if the below
code helps.
Bye,
Srinidhi
PROCEDURE proc_xyz ( av_input IN VARCHAR2 ) IS
lv_which_table VARCHAR2(15);
lr_abc_table abc_table%ROWTYPE;
lr_def_table def_table%ROWTYPE;
------ Declaration of the cursors ------
TYPE type_ref_cur IS REF CURSOR;
lcur_generic type_ref_cur;
BEGIN
IF av_input = '' THEN
------- Open the generic cursor ------- OPEN lcur_generic FOR
SELECT *
FROM abc_table
WHERE <<fill if any conditions>>;
lv_which_table := 'abc_table';
ELSE
------- Open the generic cursor ------- OPEN lcur_generic FOR
SELECT *
FROM def_table
WHERE <<fill if any conditions>>;
lv_which_table := 'def_table';
END IF;
---- Fetch the values from the cursor ----
LOOP
IF lv_whic_table = 'abc_table' THEN
FETCH lcur_generic INTO lr_abc_table;
ELSE
FETCH lcur_generic INTO lr_def_table;
END IF;
EXIT WHEN lcur_generic%NOTFOUND;
--%%% Your Business logic goes here %%%
END LOOP;
----- Close the Generic cursor ------
CLOSE lcur_generic;
END proc_xyz;
[E]Originally posted by Vladimir Sheftelyevich ([email protected]):
I was hoping to find help with coding a dynamically defined cursor statement, as some of the tables in the 'FROM' clause of the cursor definition are not known until runtime. Thanks in advance for your help!
Cheers,
Vladimir
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