Converting Oracle Stored Procedure to SQL Server Procedure - sql-server

Question

I am have created a stored procedure in oracle. Now I need to convert the same procedure to SQL Server procedure. Since I am not good at SQL procedure, please help me.
Following is the Oracle Procedure:
create or replace
PROCEDURE "FTSREMOVESPECIALCHAR"
AS strquery VARCHAR2(4000 byte);
stmt VARCHAR2(1000);
l_cursor SYS_REFCURSOR;
TYPE result_rec IS RECORD (iid NUMBER(10, 0),
fulltextdetails VARCHAR2(4000 byte),
regex VARCHAR2(4000 byte));
l_result_rec RESULT_REC;
idValue NUMBER(10, 0);
fulltextdetailsValue VARCHAR2(4000 byte);
fulltextWithoutSplChr VARCHAR2(4000 byte);
regexValue VARCHAR2(4000 byte);
minmatchValue NUMBER(10, 0);
strQueryinsert VARCHAR2(4000 byte);
BEGIN
dbms_output.ENABLE(1000000);
FOR c IN (SELECT table_name
FROM user_tables
WHERE table_name LIKE 'FULLTEXTLOOKTABLE_%')
LOOP
dbms_output.Put_line(c.table_name);
strquery := 'select ID, FullTextDetails, Regex from ' || c.table_name;
BEGIN
OPEN l_cursor FOR strquery;
LOOP
FETCH l_cursor INTO l_result_rec;
Exit when l_cursor%NOTFOUND;
fulltextdetailsValue := l_result_rec.fulltextdetails;
regexValue := l_result_rec.regex;
dbms_output.Put_line('Before :' ||fulltextdetailsValue);
fulltextdetailsValue := regexp_replace(fulltextdetailsValue, '[^[:alnum:] ]', NULL);
dbms_output.Put_line('After : '||fulltextdetailsValue);
dbms_output.Put_line('Before regexValue:' ||regexValue);
regexValue := replace(regexValue, '([\~\-])', '([\~\-])?');
regexValue := replace(regexValue, '(\!)', '(\!)?');
regexValue := replace(regexValue, '([\#])', '([\#])?');
regexValue := replace(regexValue, '(\#)', '(\#)?');
regexValue := replace(regexValue, '([\$s\&])', '([\$s\&])?');
regexValue := replace(regexValue, '(\%)', '(\%)?');
regexValue := replace(regexValue, '(\^)', '(\^)?');
regexValue := replace(regexValue, Q'[']',Q'['']');
strQueryinsert := 'update '||c.table_name||' set fulltextdetails='''||fulltextdetailsValue||''' where id='||l_result_rec.iid;
dbms_output.Put_line('strQueryinsert : ' ||strQueryinsert);
EXECUTE IMMEDIATE
strQueryinsert;
strQueryinsert := 'update '||c.table_name||' set regex='''||regexValue||''' where id='||l_result_rec.iid;
EXECUTE IMMEDIATE
strQueryinsert;
END LOOP;
EXECUTE IMMEDIATE
'commit';
close l_cursor;
END;
END LOOP;
END;
This procedure will get the all tables from the DB that starts with "FULLTEXTLOOKTABLE_". The table has 4 columns(ID(int), FullTextDetails(nvarchar), Regex(nvarchar), MinMatchCount(int)). For each table it will take the value of "FullTextDetails" column and remove all the special characters and also take the
"Regex" and replace
([\~\-]) with ([\~\-])?
(\!) with (\!)?
([\#]) with ([\#])?
(\#) with (\#)?
([\$s\&]) with ([\$s\&])?
(\%) with (\%)?
(\^) with (\^)?
And update the columns "FullTextDetails" and "Regex" with the new values. Finally the changes are committed.

Answer 1

The most difficult thing here is how to handle the regex replacement as in T-SQL there is not such build in function. Fortunately, you can implement such as I am showing here using SQL CLR integration - basically, you are allowed to write .net objects, to mapped them to SQL objects and use them. You need to do some effort but that's your only chance.
Then, the other things are pretty easy. From this system object you can get and loop through the table names:
SELECT *
FROM [sys].[tables];
You can use cursor but I prefer to skip them. It will be something like this:
DECLARE #Tables TABLE
(
[name] SYSNAME
);
DECLARE #CurrentTableName SYSNAME;
INSERT INTO #Tables ([name])
SELECT [name]
FROM [sys].[tables]
--WHERE [name] LIKE 'FULLTEXTLOOKTABLE_%';
WHILE EXISTS(SELECT 1 FROM #Tables)
BEGIN;
SELECT TOP 1 #CurrentTableName = [name]
FROM #Tables;
SELECT #CurrentTableName;
DELETE FROM #Tables
WHERE [name] = #CurrentTableName;
END;
For the building and executing of the dynamic T-SQL statement you have two options. You can build the whole statement and execute it for each loop like this:
DECLARE #DynamicTSQLStatement NVARCHAR(MAX);
SET #DynamicTSQLStatement = N'UPDATE [dbo].[table] SET [text] = ''test'' WHERE [ID] = 1';
EXEC sp_executesql #DynamicTSQLStatement;
or you can use the sp_executesql with parameters and create a template which is populated with the current values.
I hope this points will be enough to handle the task.