Find all SELECT statements without a WHERE clause using a regex - sql

Question

I'm trying to scan my codebase to find all select queries without a where clause using regex. The results will be fed into an IDE or a grep file output, but must contain the full matching queries only.
My biggest challenge is getting the entire statement without the WHERE. The caveats are:
some selects don't have a where but also don't have a FROM
some selects target a database view (always starts with a vw) which don't need a where clause
Here's a sample list of all queries fetched from one file:
'
DECLARE #RowsAffected INT = 0;
INSERT INTO tblInvoice (InvID, OcID, InvTimeStamp)
SELECT DISTINCT OcInvID, OcID, GETDATE() AS InvTimeStamp
FROM tblOrderCost OC WITH(NOLOCK)
INNER JOIN tblVendor WITH(NOLOCK) ON InvVendorID = VendorID AND VendorType = 1 -- 1 for supplier.
INNER JOIN #tmpOpID tmp WITH(NOLOCK) ON tmp.OpID = OcOpID
WHERE id = ' . quote($order_id, NUMERIC);
$sql = ' SELECT rphrpid,rphwho,rphdate,rphnotes,opid
FROM tblReplacementPartHistory (nolock)
INNER JOIN tblReplacementPart (nolock)
ON rphrpid = rpid
INNER JOIN tblOrderProduct (nolock)
ON rpopid = opid
WHERE oporid =' . quote($order_id, NUMERIC)
. 'ORDER BY rphrpid';
select * from table where id = 1;
'
select count()
';
DECLARE #RowsAffected INT = 0;
INSERT INTO tblInvoice (InvID, OcID, InvTimeStamp)
SELECT DISTINCT OcInvID, OcID, GETDATE() AS InvTimeStamp
FROM tblOrderCost OC WITH(NOLOCK)
INNER JOIN tblVendor WITH(NOLOCK) ON InvVendorID = VendorID AND VendorType = 1
INNER JOIN #tmpOpID tmp WITH(NOLOCK) ON tmp.OpID = OcOpID';
$sql = ' SELECT rphrpid,rphwho,rphdate,rphnotes,opid
FROM tblReplacementPartHistory (nolock)
INNER JOIN tblReplacementPart (nolock)
ON rphrpid = rpid
INNER JOIN tblOrderProduct (nolock)
ON rpopid = opid
ORDER BY rphrpid';
SELECT rphrpid,rphwho,rphdate,rphnotes,opid
FROM vwOrder';
select * from tbl;
I tried several variations of regex patterns and the closest I got was finding matches with the WHERE line stripped out. I would like to have the entire match made only if the query does not have a WHERE clause. I tried the following
SELECT(.*)(\s)*FROM(\s|.)+?((?!.*where))(?=(';|";|;))
SELECT\s*(?!.*\s*where|vw(\w)*).*\s*(';|";|;)
SELECT[^;\n]*(?:\n(?![^\n;]*where)[^;\n]*)*\n[\n]*
The work can also be tested in the regex101 sandbox: https://regex101.com/r/jvbLOE/1
What I expect to see, given the sample data, is only three matches
1. SELECT DISTINCT OcInvID, OcID, GETDATE() AS InvTimeStamp
FROM tblOrderCost OC WITH(NOLOCK)
INNER JOIN tblVendor WITH(NOLOCK) ON InvVendorID = VendorID AND VendorType = 1
INNER JOIN #tmpOpID tmp WITH(NOLOCK) ON tmp.OpID = OcOpID';
2. SELECT rphrpid,rphwho,rphdate,rphnotes,opid
FROM tblReplacementPartHistory (nolock)
INNER JOIN tblReplacementPart (nolock)
ON rphrpid = rpid
INNER JOIN tblOrderProduct (nolock)
ON rpopid = opid
ORDER BY rphrpid';
3. select * from tbl;

Answer 1

You can use following regex to match select queries not having a where clause in it based on your example.
/(?!.*where)select.*?;/gis
Regex 101 example:
https://regex101.com/r/XaGXp6/1