Re: [patch] Proposal for \crosstabview in psql - Mailing list pgsql-hackers

From Pavel Stehule
Subject Re: [patch] Proposal for \crosstabview in psql
Date
Msg-id CAFj8pRCwx=r0nU63QJFHYZBwLcfXD2bTmpr7omAXp3FSf14A0Q@mail.gmail.com
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In response to Re: [patch] Proposal for \crosstabview in psql  (Dean Rasheed <dean.a.rasheed@gmail.com>)
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Thinking about this some more though, perhaps *sorting* the columns is
the wrong way to be thinking about it. Perhaps a better approach would
be to allow the columns to be *listed* (optionally, using a separate
query). Something like the following (don't get too hung up on the
syntax):

SELECT name,
       to_char(date, 'Mon') AS month,
       sum(amount) AS amount
 FROM invoices
 GROUP BY 1,2
 ORDER BY name
\crosstabview cols = (select to_char(d, 'Mon') from
generate_series('2000-01-01'::date, '2000-12-01', '1 month') d)

The idea is ok, but this design cannot be described as user friendly. The work with time dimension is pretty common, and should be supported by some short user friendly syntax.

Regards

Pavel
 

Regards,
Dean

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