Joining based on email within strings on AWS Athena - amazon-web-services

Question

I have two S3 buckets that I am looking to join on Athena. In the first bucket, I have an email address in a CSV file with an email column.
sample#email.com
In the other bucket, I have a JSON file with nested email addresses used by the client. The way this has been set up in Glue means the data looks like this:
[sample#email.com;email#sample.com;com#email.sample]
I am trying the join the data by finding the email from the first bucket inside of the string from the second bucket. I have tried:
REGEXP_LIKE(lower("emailaddress"), lower("emails"))
with no success, I have also tried:
select "source".*, "target".*
FROM "source"
inner join "target"
on "membername" = "first_name"
and "memberlastname" = "last_name"
and '%'||lower("emailaddress")||'%' like lower("emails")
With no success. I am doing something wrong and it is evading me where I am making this error.

Answer 1

It seems you need to reverse your like arguments:
-- sample data
WITH dataset (id, email) AS (
VALUES (1,'sample#email.com'),
(2,'non-present#email.com')
),
dataset2 (emails) as (
VALUES ('[sample#email.com;email#sample.com;com#email.sample]')
)
-- query
SELECT *
FROM dataset
INNER JOIN dataset2 on
lower(emails) like '%' || lower(email) || '%'
Output:
id
email
emails
1
sample#email.com
[sample#email.com;email#sample.com;com#email.sample]