Query builder subquery added multiple quotes if select more than 1 column

@nata,

if none of the suggested solutions are what you wish to use then my next recommendation is to troubleshoot the query to find out exactly where the issue is.  Take the generated query that was created and run it directly in PostgreSQL.  What error does it give you?  Try to get the query to work in PostgreSQL and then mimic it in your CI code.

@php_rocs,

My query in PostgreSQL is working fine. and I do the same in CI, the query's log is same as the query in PostgreSQL except the double quotes I mentioned above.