Hi,

I am new to PostgreSQL and have a question about the new jsonb type in 9.4.
Suppose I have a table called "user" that has two columns: (1) "user_id" of
type text, also the primary key, (2) "setting" of type jsonb. With the
following query pattern:

SELECT *
FROM user
WHERE user_id IN [...]
ORDER BY setting->>'foo',
         setting->>'bar',
         ...

where ORDER BY clause can contain an arbitrary list of root-level fields in
"setting". In this case, how should I create indexes for "user" to get good
query performance?

Thanks,
Pai-Hung

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