Table has field containing the list of IDs separated by "-".
Example: 559-3319-3537-4345-29923
I need to check rows that use at least 4 of the specified identifiers using regex
Example: before inserting to the db, I need to check the value 559-3319-3537-29923-30762 for this condition.
I’ve build a pattern that only works in the specified order, but if the IDs are swapped, it doesn’t work.
Template: ^.*b(-*(559|3319|3537|29923|30762)-*){4,}b.*$
Initially, I thought that a simple (559|3319|3537|29923|30762){4,} should be enough, but in this case it also doesn’t work, although it sees all 4 values without a quantifier.
Please tell me how to write such an expression correctly.
2
Answers
Edit:
The reasoning behind this is that each group is not just one of the 5 numbers, but it can include some extra characters. So the matched groups in your example are:
Original answer:
This would be one way to do it (not sure if there are other ways to do it):
For ease of reading/testing, I’ve simplified the Ids being searched for to single digit integers 1-5. The following pattern will match strings with at least 4 out of the 5 ids:
(Play with this here)
OR MySQL’s regex dialect:
(Play with MySQL version here)
Here are some examples:
If the repeated Ids as shown in example 3 are an issue, then regex is probably not a good fit for this problem.