UPDATE stored procedure with conditional arguments - oracle

Question

I want to write an Oracle UPDATE stored procedure where I reset certain fields if BIT argument is true. If BIT argument is not true, then update should take the already existing value or skip updating the field. How can I achieve this?
What I am trying to achieve more or less is this
CREATE OR REPLACE PROCEDURE [dbo].[p_update_fields]
#ID varchar(255),
#RESET_FIELD_1 boolean,
#RESET_FIELD_2 boolean,
#RESET_FIELD_3 boolean
AS
BEGIN
SET NOCOUNT ON;
BEGIN TRANSACTION
IF EXISTS (SELECT id FROM dbo.TABLE_NAME WHERE id = #ID)
declare field1_;
declare field2_;
select t.field1, t.field2 INTO field1_, field2_ FROM dbo.TABLE_NAME t where t.id = #ID
if(#RESET_FIELD_1 = true)
field1_ = null;
if(#RESET_FIELD_2 = true)
field2_ = null;
UPDATE dbo.TABLE_NAME
SET
field1 = field1_,
field2 = field2_
WHERE id = #ID
END TRANSACTION
SET NOCOUNT OFF;
END

Answer 1

If you do use Oracle, then have a look at the following example. I chose not to pass Boolean but numeric values (they are simpler to use; 1 represents "true", 0 is then "false").
Sample data:
SQL> SELECT * FROM table_name ORDER BY id;
ID FIELD1 FIELD2 FIELD3
---- ---------- ---------- ----------
A123 100 200 300
B456 1 2 3
Procedure:
SQL> CREATE OR REPLACE PROCEDURE p_update_fields (par_id IN VARCHAR2,
2 par_reset_1 IN NUMBER,
3 par_reset_2 IN NUMBER,
4 par_reset_3 IN NUMBER)
5 IS
6 BEGIN
7 UPDATE table_name
8 SET field1 = CASE WHEN par_reset_1 = 1 THEN NULL ELSE field1 END,
9 field2 = CASE WHEN par_reset_2 = 1 THEN NULL ELSE field2 END,
10 field3 = CASE WHEN par_reset_3 = 1 THEN NULL ELSE field3 END
11 WHERE id = par_id;
12 END;
13 /
Procedure created.
Testing: let's reset just FIELD1 for ID = 'A123':
SQL> BEGIN
2 p_update_fields (par_id => 'A123',
3 par_reset_1 => 1,
4 par_reset_2 => 0,
5 par_reset_3 => 0);
6 END;
7 /
PL/SQL procedure successfully completed.
Result:
SQL> SELECT * FROM table_name ORDER BY id;
ID FIELD1 FIELD2 FIELD3
---- ---------- ---------- ----------
A123 200 300 --> FIELD1 is now NULL
B456 1 2 3
SQL>