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From Nicolas Paris <nipari...@gmail.com>
Subject Re: DRILL 1.4 - newline in strings not supported
Date Mon, 01 Feb 2016 15:53:43 GMT
@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
> >
>

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