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From Abdel Hakim Deneche <adene...@maprtech.com>
Subject Re: DRILL 1.4 - newline in strings not supported
Date Mon, 01 Feb 2016 16:16:53 GMT
When you run a select * on your csv file, does it succeed or fail ?

On Mon, Feb 1, 2016 at 7:53 AM, Nicolas Paris <niparisco@gmail.com> wrote:

> @Abdel,
>
> Yes problem is similar. By the way, the jira issue allready exists isnt'it
> ?
>
> https://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjUscyr7tTKAhXBVhoKHf0CAjYQFggpMAE&url=http%3A%2F%2Fmail-archives.apache.org%2Fmod_mbox%2Fdrill-dev%2F201505.mbox%2F%253CJIRA.12832322.1432356299000.15684.1432356317225%40Atlassian.JIRA%253E&usg=AFQjCNHEwAdEpCBmS1QeuLhdfL8SIdTx6Q&sig2=4EM_xXq2QWd8kmC3LT2-Wg
> If not, I would be glad to add one. Just tell me why
>
> @Ted,
>
> If you have new lines in your files then the files becomes unsuitable for
> splitting.  This means that the only parallelism available in a ctas
> statement is multiple files
>
> ​Does it means newlines are incompatible with drill's distributed calculus
> ?
>
> Do you have a fair number of files?​
> ​I have one 30GB csv file. I don't know how many parquet file it could
> create as process crashes because of newlines.
> I can imagine approx 5 parquet files 500 MB.
>
> Thanks,​
>
>
> 2016-02-01 16:41 GMT+01:00 Abdel Hakim Deneche <adeneche@maprtech.com>:
>
> > Another user already reported some problems querying csv files with new
> > line characters:
> >
> > http://comments.gmane.org/gmane.comp.apache.incubator.drill.user/2350
> >
> > His particular problem was related to a bug in the LIKE function.
> > Unfortunately he never got around to fill a JIRA for his issue.
> >
> > Is your problem similar ? if yes, then can you please fill a JIRA ?
> >
> > On Mon, Feb 1, 2016 at 7:26 AM, Nicolas Paris <niparisco@gmail.com>
> wrote:
> >
> > > Hello Abdel,
> > >
> > > I am creating parquet file from those CSV files. (CREATE TABLE syntax).
> > > Basically, I have a text column, with a maximum of 50k characters,
> > > containing newlines (the texts come from pdf extracted). I have
> > > multimilions tuples of texts. I am subseting texts containing some
> > patterns
> > > (LIKE '%foo%' or regex => sadly I haven't found mention about regex in
> > > documentation (postgresql "~" operator equivalent))
> > > Usually I used postgresql or monetdb in order to mine the texts, but I
> am
> > > benchmarking/studying apache drill too.
> > >
> > > Thanks,
> > >
> > >
> > > 2016-02-01 15:54 GMT+01:00 Abdel Hakim Deneche <adeneche@maprtech.com
> >:
> > >
> > > > Hey Nicolas,
> > > >
> > > > what kind of queries are you running on your csv file ?
> > > >
> > > > On Sun, Jan 31, 2016 at 12:14 PM, Nicolas Paris <niparisco@gmail.com
> >
> > > > wrote:
> > > >
> > > > > Hello,
> > > > >
> > > > > I am trying to import a csv containing large texts. They contains
> > > newline
> > > > > character "\n".
> > > > > Apache Drill conplains about that. There is a jira issue opened on
> > > > >
> > > > >
> > > >
> > >
> >
> https://www.google.fr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwjUscyr7tTKAhXBVhoKHf0CAjYQFggpMAE&url=http%3A%2F%2Fmail-archives.apache.org%2Fmod_mbox%2Fdrill-dev%2F201505.mbox%2F%253CJIRA.12832322.1432356299000.15684.1432356317225%40Atlassian.JIRA%253E&usg=AFQjCNHEwAdEpCBmS1QeuLhdfL8SIdTx6Q&sig2=4EM_xXq2QWd8kmC3LT2-Wg
> > > > >
> > > > > Is there a workaround ? (different that removing \n from texts)
> > > > >
> > > > > Thanks by advance
> > > > >
> > > >
> > > >
> > > >
> > > > --
> > > >
> > > > Abdelhakim Deneche
> > > >
> > > > Software Engineer
> > > >
> > > >   <http://www.mapr.com/>
> > > >
> > > >
> > > > Now Available - Free Hadoop On-Demand Training
> > > > <
> > > >
> > >
> >
> http://www.mapr.com/training?utm_source=Email&utm_medium=Signature&utm_campaign=Free%20available
> > > > >
> > > >
> > >
> >
> >
> >
> > --
> >
> > Abdelhakim Deneche
> >
> > Software Engineer
> >
> >   <http://www.mapr.com/>
> >
> >
> > Now Available - Free Hadoop On-Demand Training
> > <
> >
> http://www.mapr.com/training?utm_source=Email&utm_medium=Signature&utm_campaign=Free%20available
> > >
> >
>



-- 

Abdelhakim Deneche

Software Engineer

  <http://www.mapr.com/>


Now Available - Free Hadoop On-Demand Training
<http://www.mapr.com/training?utm_source=Email&utm_medium=Signature&utm_campaign=Free%20available>

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