BUG #12792: I can do a SELECT with no fields
The following bug has been logged on the website:
Bug reference: 12792
Logged by: Regina Obe
Email address: lr@pcorp.us
PostgreSQL version: 9.4.1
Operating system: Windows 2008 R2
Description:
I'm not sure if this is a bug or not, but it seems like a misfeature if it
isn't.
I made the typo of doing
SELECT FROM sometable;
you can also trigger the issue with just doing:
SELECT ;
outputs:
--
(1 row)
I thought there was something wrong with my viewer since it clearly showed
rows, but no fields.
In 9.3 -- this would just error out as I think most databases do. So this
was a bit of a gotcha.
I'm not sure if this issue existed in 9.4.0 alreadyy since I've already
upgraded my database.
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lr@pcorp.us writes:
I'm not sure if this is a bug or not, but it seems like a misfeature if it
isn't.
It is an intentional change, see the 9.4 release notes.
regards, tom lane
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"lr@pcorp.us" <lr@pcorp.us> wrote:
I'm not sure if this is a bug or not,
It it's not. See the release notes:
http://www.postgresql.org/docs/9.4/interactive/release-9-4.html
| Allow SELECT to have an empty target list (Tom Lane)
|
| This was added so that views that select from a table with zero
| columns can be dumped and restored correctly.
For a more detailed explanation of why this feature was added, see
the commit message:
--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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