Extract all SQL commands called in SQL Server stored procedure - sql-server

Question

Let's say there is a stored procedure:
------
/****** This is my procedure
Dev
author
build date
last modified date
**********/
-- procedure starts
create procedure [temp_my_proc]
begin
declare var1, var2, .. var N
-- 1st select
select a, b, c, d
from mytable_1;
-- delete record
delete from mytable_2;
-- insert record select
insert into mytable_4
select x, y, z
from mytable_3;
end
Now I want to extract the SQL used in this stored procedure by using some SQL command. I tried using these commands:
create table #tmp
(
id int identity(1, 1),
sqlsyntax varchar(max)
);
insert into #tmp (sqlsyntax)
exec sp_helptext temp_my_proc;
select *
from #tmp;
But select * from #tmp is spitting out entire definition of the stored procedure in separate rows. How I can extract just the 3 SQL statements from the stored procedure by omitting all multiple line or single line comment present in the stored procedure?
Expected results is
select a, b, c, d
from mytable_1;
delete from mytable_2;
insert into mytable_4
select x, y, z
from mytable_3;

Answer 1

For modern versions of SQL Server STRING_SPLIT() is the one you need. You need to cross apply your text output against string split, splitting on the enter character i.e.
SELECT #tmp.id, lines.value
FROM #tmp
CROSS APPLY STRING_SPLIT(#tql.sqlsyntax,'
') AS lines
That will split your results into one row per line. Unfortunately you would not be able to distinguish multi-line statements from single ones.
Then you can filter by out the comments by checking
WHERE lines.value NOT LIKE '%--%' AND lines.value<> ''
However, some of your comments are enclosed by /* signs, which go across lines. Unfortunately, there is nothing you can do directly. But if you manually replaced the contents of those comments with -- or used a regex to do so you would be able to handle it.