RE: [discussion]When table properties is repeated it only set the last one

Posted by Jihong Ma on Sep 29, 2016; 8:17pm
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/discussion-When-table-properties-is-repeated-it-only-set-the-last-one-tp1539p1565.html


We have start the discussion with Spark guys to open the door for pluggable parser going forward, and some of features we have now would require syntax extension as well, for now, we are ok.

Regards.

Jenny

-----Original Message-----
From: Ravindra Pesala [mailto:[hidden email]]
Sent: Wednesday, September 28, 2016 8:42 PM
To: dev
Subject: Re: [discussion]When table properties is repeated it only set the last one

I am rethinking, As per the hive behavior it only takes the last one if
tableproperties are repeated. We can add the validation now in carbondata
as we control the ddl parsing. But going forward in spark 2.0 we cannot
control the ddl parsing so it is not possible to add validations there. So
I guess we better stick to the hive behavior to avoid future problems.

Regards,
Ravindra.

On 29 September 2016 at 08:04, Aniket Adnaik <[hidden email]>
wrote:

> +1 for option-1- should throw exception..
> Regards,
> Aniket
>
> On 28 Sep 2016 7:01 p.m., "Ravindra Pesala" <[hidden email]> wrote:
>
> > +1 for option 1
> >
> > On Thu, 29 Sep 2016 02:52 Jihong Ma, <[hidden email]> wrote:
> >
> > > Would prefer error out, vote for option 1.
> > >
> > > Jenny
> > >
> > > -----Original Message-----
> > > From: Zhangshunyu [mailto:[hidden email]]
> > > Sent: Wednesday, September 28, 2016 12:11 AM
> > > To: [hidden email]
> > > Subject: [discussion]When table properties is repeated it only set the
> > > last one
> > >
> > > When table properties is repeated it only set the last one, for
> example,
> > >
> > > CREATE TABLE IF NOT EXISTS carbontable
> > > (ID Int, date Timestamp, country String,
> > > name String, phonetype String, serialname String, salary Int)
> > > STORED BY 'carbondata'
> > > TBLPROPERTIES('DICTIONARY_EXCLUDE'='country','
> DICTIONARY_INCLUDE'='ID',
> > > 'DICTIONARY_EXCLUDE'='phonetype', 'DICTIONARY_INCLUDE'='salary')
> > >
> > > As we use map to store the properties, only salary is set to
> > > DICTIONARY_INCLUDE and only phonetype is set to DICTIONARY_EXCLUDE.
> > >
> > > I think we can fix this pbm in 2 way:
> > >
> > > 1. Do restrict syntax check: When tblProperty is repeated, throw an
> > > MalformedCarbonCommandException to tell the user that table properties
> > is
> > > repeated, so that the user would not perform error operation.
> > > 2. Let the properties recombining, and set the table properties for all
> > the
> > > specified columns.
> > >
> > > What's your opinion?
> > >
> > >
> > >
> > > --
> > > View this message in context:
> > > http://apache-carbondata-mailing-list-archive.1130556.
> > n5.nabble.com/discussion-When-table-properties-is-repeated-
> > it-only-set-the-last-one-tp1539.html
> > > Sent from the Apache CarbonData Mailing List archive mailing list
> archive
> > > at Nabble.com.
> > >
> >
>

--
Thanks & Regards,
Ravi