Re: [GENERAL] Unexpected update behaviour

2013-12-14 Thread Tom Lane 
Victor Yegorov vyego...@gmail.com writes:
 Could you kindly explain me why the query as it is updates no records?

It's a bug, that's why.  See
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=324577f39bc8738ed0ec24c36c5cb2c2f81ec660
or for 9.2,
http://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=5d545b7ed53a8b2058c1152bd1c9ae227b3280e3

regards, tom lane


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[GENERAL] Unexpected update behaviour

2013-12-13 Thread Victor Yegorov 
Greetings.

I've hit a strange issue. This is a simplified setup.
First, run create.sql to get a couple of tables.
Then, run the update query.

Tested on 9.2.6 and 9.3.2.

Now:
- if I remove the UNION ALL part of the inner query, UPDATE works;
- if I move the `raw` subquery into the CTE, UPDATE works (but takes
  hours on my full data);
- if I convert this UPDATE into a SELECT, I get the row to be updated.

Could you kindly explain me why the query as it is updates no records?


-- 
Victor Y. Yegorov


create.sql
Description: Binary data


update.sql
Description: Binary data

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