Convert mySQL query to KNEX - mysql

Question

I am converting series of queries to Knex syntax.
I am having problem with this query:
SELECT id,reviewed,log_reference,CONVERT(notification USING utf8),create_time,update_time,store,user_id
FROM store_failure_log
WHERE reviewed = 0
AND create_time BETWEEN NOW() - INTERVAL 18 HOUR AND NOW();
More precisely this line:
SELECT id,reviewed,log_reference,CONVERT(notification USING utf8),create_time,update_time,store,user_id
I have this Knex in place:
knex('store_failure_log')
.select('id', 'reviewed', 'log_reference', 'CONVERT(notification USING utf8)', 'create_time', 'update_time', 'store', 'user_id').convert('notification USING utf8')
.where('reviewed', 0)
.where(knex.raw('create_time BETWEEN NOW() - INTERVAL 18 HOUR AND NOW()'))
that produces this sql query:
select `id`, `reviewed`, `log_reference`, `CONVERT(notification USING utf8)`, `create_time`, `update_time`, `store`, `user_id` from `store_failure_log` where `reviewed` = 0 and create_time BETWEEN NOW() - INTERVAL 18 HOUR AND NOW()
Problem is in the: Convert(notification USING utf8).
The query is not valid, since the Convert is in parentheses. How can I write it with the knex?
In general how do I include SQL function calls in the KNEX syntax?

Answer 1

You can use raw to include SQL function calls in your Knex query, like you've already done in your where:
knex('store_failure_log')
.select(knex.raw('id, reviewed, log_reference, CONVERT(notification USING utf8), create_time, update_time, store, user_id'))
.where('reviewed', 0)
.where(knex.raw('create_time BETWEEN NOW() - INTERVAL 18 HOUR AND NOW()'))

Answer 2

Here is fixed version of #Veve's answer with correct quoting of identifiers and knex.raw syntax:
knex('store_failure_log')
.select('id', 'reviewed', 'log_reference', knex.raw('CONVERT(?? USING utf8)', ['notification']), 'create_time', 'update_time', 'store', 'user_id')
.where('reviewed', 0)
.where(knex.raw('?? BETWEEN NOW() - INTERVAL 18 HOUR AND NOW()', ['create_time']))
https://runkit.com/embed/lh2i1qif7obx