Loop with dynamic table name and where clause stored procedure - sql-server

Question

I am trying to update records and insert their audits to audit table.
For this purpose stored procedure waiting for above variables.
#m_obj_id INT,
#m_obj_code NVARCHAR(250),
#m_f_code NVARCHAR(250),
#m_nv NVARCHAR(4000),
#m_last_mod_by INTEGER,
#table_name SYSNAME,
--#where_clause NVARCHAR(4000)
Stored procedure formatting these variables as;
UPDATE #table_name SET #m_f_code=#m_nv WHERE id=#m_obj_id
And at last part inserting into audit.
I can use it with doing SELECT CONCAT and copying all the rows then execute.
But my goal is here not expecting #m_obj_id from user and replace it #where_clause. And use this #where_clause to get ids inside.
So far I tried;
DECLARE #Sql NVARCHAR(MAX)
DECLARE #RecordId int = 0
BEGIN
SET #SQL = N'
SELECT #RecordId = MIN(id)
FROM ' + #table_name + '
WHERE id > #RecordId AND (' + #where_clause + ')
IF #RecordId IS NULL BREAK
SET #m_obj_id = #RecordId'
Exec sp_executesql #sql
But couldnt get far with it.
Then I tried something like;
DECLARE #RowsToProcess int
DECLARE #CurrentRow int
DECLARE #SelectCol1 int
DECLARE #sql NVARCHAR(MAX)
SET #sql = N'
DECLARE #table1 TABLE (RowID int not null primary key identity(1,1), col1 int )
INSERT into #table1 (col1) SELECT id FROM ' + #table_name + ' Where ' + #where_clause + '
SET #RowsToProcess=##ROWCOUNT'
EXEC sp_executesql #sql,
N'#RowsToProcess INT OUTPUT', #RowsToProcess OUTPUT
SET #CurrentRow=0
WHILE #CurrentRow<#RowsToProcess
BEGIN
SET #CurrentRow=#CurrentRow+1
DECLARE #sql2 NVARCHAR(MAX)
SET #sql2 = N'
SET #m_obj_id =
(SELECT col1
FROM #table1
WHERE RowID=#CurrentRow)'
EXEC sp_executesql #sql2
But still no luck.
Can I achieve this any how? I am trying to do this for more than it should be.
Thanks all.

Answer 1

The non-dynamic way to implement dynamic filtering on sql is the following:
where id=#m_obj_id or #m_obj_id is null
For a LOT of more details on how to choose between dynamic and non-dynamic sql on this, I recommend this article by Erland Sommarskog

Answer 2

I found a solution. Thanks everyone for responding.
I used a temp table like
DECLARE #RowsToProcess INTEGER
DECLARE #CurrentRow INTEGER
DECLARE #SelectCol1 INTEGER
CREATE TABLE #tmp (RowID INTEGER NOT NULL PRIMARY KEY IDENTITY(1,1), col1 int)
DECLARE #sql NVARCHAR(MAX)
SET #sql = N'
INSERT into #tmp (col1) SELECT id FROM ' + #table_name + ' Where ' + #where_clause + '
SET #RowsToProcess=##ROWCOUNT'
INSERT INTO #tmp
EXEC sp_executesql #sql,
N'#RowsToProcess INT OUTPUT', #RowsToProcess OUTPUT
SET #CurrentRow=0
WHILE #CurrentRow<#RowsToProcess
BEGIN
SET #CurrentRow=#CurrentRow+1
SET #m_obj_id =
(SELECT col1
FROM #tmp
WHERE RowID=#CurrentRow)
Do stuff....