On 10/30/2015 08:13 AM, Dane Foster wrote:
On Fri, Oct 30, 2015 at 10:57 AM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>> wrote: On 10/30/2015 07:21 AM, Dane Foster wrote: On Fri, Oct 30, 2015 at 9:40 AM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>>> wrote: On 10/29/2015 05:38 PM, Dane Foster wrote: Hello, I think I've tripped over another mysq_fdw bug. I've filed a bug report on github already but just in case the problem is w/ my query I figured I would post it here in case someone sees something obvious. The error message I get is: null value in column "location" violates not-null constraint. The DDL is here: https://github.com/EnterpriseDB/mysql_fdw/issues/71 For the record I know top posting is a crime against god and humanity but I feel justified because this post is not directly related to the original. So there! Granted it's in the same milieu; and yes this current sentence exists for the sole purpose of me being able to use the word milieu because the opportunity to use it is so few and far between. INSERT INTO series (cid, day, title, description, location, duration, can_join) SELECT cid, row_number() OVER (PARTITION BY cid ORDER BY lower(duration)), title, description, location, duration, can_join FROM ( SELECT cid, title, description, can_join::BOOLEAN, (SELECT label FROM _locations WHERE loc=location) AS location, ('[' || starts || ', ' || (starts + INTERVAL '4 HOUR') || ']')::TSZ_PERIOD AS duration FROM _series ) AS v Regards, So what do you get when you do?: SELECT cid, title, description, can_join::BOOLEAN, (SELECT label FROM _locations WHERE loc=location) AS location, ('[' || starts || ', ' || (starts + INTERVAL '4 HOUR') || ']')::TSTZRANGE AS duration FROM _series ); Dane -- Adrian Klaver adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> <mailto:adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>> I get rows of data, location and all. And when you do?: SELECT cid, row_number() OVER (PARTITION BY cid ORDER BY lower(duration)), title, description, location, duration, can_join FROM ( SELECT cid, title, description, can_join::BOOLEAN, (SELECT label FROM _locations WHERE loc=location) AS location, ('[' || starts || ', ' || (starts + INTERVAL '4 HOUR') || ']')::TSTZRANGE AS duration FROM _series ) AS v Dane -- Adrian Klaver adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx> Before I answer your second query question I need to revise my response to the first. Yes the first query runs w/o an error message but the bit about "rows and all" was not entirely correct. Out of 313 rows only the first row had a location. The other 312 rows have NULL in the location column which is not supposed to happen. To verify this I changed the table names and removed the PostgreSQL transformations (i.e., use of || and :: for casting) and ran the query against the MySQL database; it returned 313 rows of data, location and all.
You would think that would also cause an issue with the first row that is returned correctly. My suspicion is with this:
row_number() OVER (PARTITION BY cid ORDER BY lower(duration)) What happens if you run the full SELECT without it?
Now that I've cleared that up. Your second query also runs w/o any error messages but like the first only the first row has a non NULL value in the location column. Dane
-- Adrian Klaver adrian.klaver@xxxxxxxxxxx -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
