Question

I have an SQL query that returns all companies records ignore the ones with email matching a given pattern using Postgresql ([e-mail]) the plus sign is included as well.

Normal email pattern would be ‘[e-mail]’

My SQL query looks like:

SELECT * from companies
where email !~ E'^(info)+[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+';

Does the syntax look correct?

Update:

The following query does match the pattern:

SELECT * from companies
where email ~ E'^(info\+)+[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+';

Now how to reverse it, as !~ doesn’t seem to ignore the matching pattern

update2:

Correct syntax is indeed the following:

SELECT * from companies
where email ~ E'^info\\+[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+';

Answer 1

Escape (double escape) the plus sign:

E'^(info)\\+[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+'
  here __^^

Moreover, there’re no need to make a group with (info)

E'^info\\+[A-Za-z0-9._%-]+@[A-Za-z0-9.-]+[.][A-Za-z]+'