Ruby Regexp match matching repetitive values - ruby

Question

I'm facing some issues with Ruby Regexp match.
I have the following query and I'd like to scan my parameters:
EXEC sp_executesql N'exec dbo.MyProcedure #UserID=#p0,#Products=#p1,#CountryCodes=#p2'
, N'#p0 int,#p1 nvarchar(max) ,#p2 nvarchar(max)'
, #p0 = 123569
, #p1 = N'1633,1634'
, #p2 = N'39A,CS,DE,ES,FR,GB,IT,NL,AB,BS,BU,CR,ET,FI,HU,LA,LT,MD,ME,MV,PL,RO,RS,SK,SV,GR,PT,TR,AT,CH,LI,GG,KS,UK,GI,MN,RR,CY,MT,BL,RU,DK,NO,SE,BE,IC,IE,LX'
I've just formatted query to look neat and readable. In my source there are fewer tabs and whitespaces.
Ideally, I'd like to get three matches:
#p0 = 123569
#p1 = N'1633,1634'
#p2 = N'39A,CS,DE,ES,FR,GB,IT,NL,AB,BS,BU,CR,ET,FI,HU,LA,LT,MD,ME,MV,PL,RO,RS,SK,SV,GR,PT,TR,AT,CH,LI,GG,KS,UK,GI,MN,RR,CY,MT,BL,RU,DK,NO,SE,BE,IC,IE,LX'
However, my Regexp pattern merges #p1 and #p2 and this is what I get:
#p0 = 123569
#p1 = N'1633,1634',#p2 = N'39A,CS,DE,ES,FR,GB,IT,NL,AB,BS,BU,CR,ET,FI,HU,LA,LT,MD,ME,MV,PL,RO,RS,SK,SV,GR,PT,TR,AT,CH,LI,GG,KS,UK,GI,MN,RR,CY,MT,BL,RU,DK,NO,SE,BE,IC,IE,LX'
I can see where's the issue, however I'm quite new to Regexp and I cannot figure out how to write it properly. This is my expression:
(\#p[0-9]+)+\=(\N\'.*\'|[0-9]+|NULL)
I'm testing my Regex expression here: http://rubular.com/r/OF5EVD5Nau

Answer 1

You main problem is the .* part in the second alternation, by default regex are greedy and match as much as possible.
You can turn it into lazy or ungreedy by adding a ? after the repetition operator.
So with little change this would do:
(#p[0-9]+)\s+=\s+(\d+|N'.+?'$|NULL)
Rubular example
There's some unknown from you description on the spaces, I used + as repetition operator assuming there will be at least 1 present around the = sign, as in the single quotes, I assume they are never empty. Replace by * if they are optionnal.