You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@hbase.apache.org by Pavan Sudheendra <pa...@gmail.com> on 2013/07/31 14:19:37 UTC
How to get row key from row value?
How do i get the row key by specifying a row value assuming row values
are unique?
What API should i use for this purpose?
--
Regards-
Pavan
Re: How to get row key from row value?
Posted by Shahab Yunus <sh...@gmail.com>.
Yup, as far as I understand. It is application specific how sophisticated
and extensive we want this to be. Unless I am off-base here (Stack or other
experts can correct me?)
Regards,
Shahab
On Wed, Jul 31, 2013 at 10:02 AM, Pavan Sudheendra <pa...@gmail.com>wrote:
> So a secondary table here is more of a temporary table which I can just do
> a get operation and get the value?
>
> Am I right?
>
> Regards,
> Pavan
> On Jul 31, 2013 7:24 PM, "Shahab Yunus" <sh...@gmail.com> wrote:
>
> > Please correct me if I am wrong but I think there is as such no hard and
> > fast technique for it. There are no constructs or method to this
> > specifically in HBase. Your client while writing have to make sure to
> write
> > to both tables: 1) the main table 2) and the secondary index table.
> > Basically it is up to you according to the use-case and application. You
> > can delegate this to a sort of a middle (separate layer from client app
> at
> > least) which takes care of maintaing consistency between the two tables.
> > This layer will be used for both read and write to implement and handle
> > your indexing. The one obvious issue that you need to take into
> > consideration is atomicity and consistency of the two tables.
> >
> > Regards,
> > Shahab
> >
> >
> > On Wed, Jul 31, 2013 at 9:37 AM, Pavan Sudheendra <pavan0591@gmail.com
> > >wrote:
> >
> > > Yes perfect. Could i get few examples on how to create a secondary
> lookup
> > > table?
> > >
> > >
> > > On Wed, Jul 31, 2013 at 7:01 PM, Jean-Marc Spaggiari
> > > <je...@spaggiari.org> wrote:
> > > > Hi Pavan,
> > > >
> > > > for your lookup table, you need to lookup on the value? Not on the
> > they?
> > > If
> > > > that's the case, just "revert" your table into a secondary index
> lookup
> > > > table where the value will be the key, and the key will be the value.
> > > That
> > > > way you just to a get on this secondary index lookup table instead of
> > > doing
> > > > a scan...
> > > >
> > > > Make sense?
> > > >
> > > > JM
> > > >
> > > > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> > > >
> > > >> Before inserting a row in my main table, i need to do a lookup on my
> > > >> lookup table. I'm really not sure what logic has to be behind this.
> > > >> Should i do a full table scan of the lookup table every single time
> i
> > > >> insert in the main table?
> > > >>
> > > >> Thanks jean
> > > >>
> > > >>
> > > >>
> > > >> On Wed, Jul 31, 2013 at 6:10 PM, Jean-Marc Spaggiari
> > > >> <je...@spaggiari.org> wrote:
> > > >> > the best way is to insert on your lookup table each time you
> insert
> > on
> > > >> your
> > > >> > main table. That way you don't have to scan your entire main table
> > to
> > > >> build
> > > >> > the lookup table...
> > > >> >
> > > >> > If you want to filter by CF you can look at
> > > >> >
> > > >>
> > >
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
> > > >> > .
> > > >> >
> > > >> > Basically, you have all the filters listed there:
> > > >> >
> > > >>
> > >
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
> > > >> >
> > > >> > You should be able to find one which match your needs.
> > > >> >
> > > >> > JM
> > > >> >
> > > >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> > > >> >
> > > >> >> Hi Jean,
> > > >> >> Is there a way to specify column family, column qualifier and
> > column
> > > >> >> value to get the row key without having to scan the table every
> > > single
> > > >> >> time?
> > > >> >> Basically, i'm building a lookup table which helps in insertion
> of
> > > >> >> another HBase table. its quite complicated to explain.
> > > >> >>
> > > >> >> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
> > > >> >> <je...@spaggiari.org> wrote:
> > > >> >> > Hi Pavan,
> > > >> >> >
> > > >> >> > Are you looking for something like
> > > >> >> >
> > > >> >>
> > > >>
> > >
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
> > > >> >> ?
> > > >> >> >
> > > >> >> > You are going to do a table full scan... If you value is uniq,
> > you
> > > >> might
> > > >> >> > want to build a secondary index table for direct access...
> > > >> >> >
> > > >> >> > JM
> > > >> >> >
> > > >> >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> > > >> >> >
> > > >> >> >> How do i get the row key by specifying a row value assuming
> row
> > > >> values
> > > >> >> >> are unique?
> > > >> >> >>
> > > >> >> >> What API should i use for this purpose?
> > > >> >> >> --
> > > >> >> >> Regards-
> > > >> >> >> Pavan
> > > >> >> >>
> > > >> >>
> > > >> >>
> > > >> >>
> > > >> >> --
> > > >> >> Regards-
> > > >> >> Pavan
> > > >> >>
> > > >>
> > > >>
> > > >>
> > > >> --
> > > >> Regards-
> > > >> Pavan
> > > >>
> > >
> > >
> > >
> > > --
> > > Regards-
> > > Pavan
> > >
> >
>
Re: How to get row key from row value?
Posted by Pavan Sudheendra <pa...@gmail.com>.
So a secondary table here is more of a temporary table which I can just do
a get operation and get the value?
Am I right?
Regards,
Pavan
On Jul 31, 2013 7:24 PM, "Shahab Yunus" <sh...@gmail.com> wrote:
> Please correct me if I am wrong but I think there is as such no hard and
> fast technique for it. There are no constructs or method to this
> specifically in HBase. Your client while writing have to make sure to write
> to both tables: 1) the main table 2) and the secondary index table.
> Basically it is up to you according to the use-case and application. You
> can delegate this to a sort of a middle (separate layer from client app at
> least) which takes care of maintaing consistency between the two tables.
> This layer will be used for both read and write to implement and handle
> your indexing. The one obvious issue that you need to take into
> consideration is atomicity and consistency of the two tables.
>
> Regards,
> Shahab
>
>
> On Wed, Jul 31, 2013 at 9:37 AM, Pavan Sudheendra <pavan0591@gmail.com
> >wrote:
>
> > Yes perfect. Could i get few examples on how to create a secondary lookup
> > table?
> >
> >
> > On Wed, Jul 31, 2013 at 7:01 PM, Jean-Marc Spaggiari
> > <je...@spaggiari.org> wrote:
> > > Hi Pavan,
> > >
> > > for your lookup table, you need to lookup on the value? Not on the
> they?
> > If
> > > that's the case, just "revert" your table into a secondary index lookup
> > > table where the value will be the key, and the key will be the value.
> > That
> > > way you just to a get on this secondary index lookup table instead of
> > doing
> > > a scan...
> > >
> > > Make sense?
> > >
> > > JM
> > >
> > > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> > >
> > >> Before inserting a row in my main table, i need to do a lookup on my
> > >> lookup table. I'm really not sure what logic has to be behind this.
> > >> Should i do a full table scan of the lookup table every single time i
> > >> insert in the main table?
> > >>
> > >> Thanks jean
> > >>
> > >>
> > >>
> > >> On Wed, Jul 31, 2013 at 6:10 PM, Jean-Marc Spaggiari
> > >> <je...@spaggiari.org> wrote:
> > >> > the best way is to insert on your lookup table each time you insert
> on
> > >> your
> > >> > main table. That way you don't have to scan your entire main table
> to
> > >> build
> > >> > the lookup table...
> > >> >
> > >> > If you want to filter by CF you can look at
> > >> >
> > >>
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
> > >> > .
> > >> >
> > >> > Basically, you have all the filters listed there:
> > >> >
> > >>
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
> > >> >
> > >> > You should be able to find one which match your needs.
> > >> >
> > >> > JM
> > >> >
> > >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> > >> >
> > >> >> Hi Jean,
> > >> >> Is there a way to specify column family, column qualifier and
> column
> > >> >> value to get the row key without having to scan the table every
> > single
> > >> >> time?
> > >> >> Basically, i'm building a lookup table which helps in insertion of
> > >> >> another HBase table. its quite complicated to explain.
> > >> >>
> > >> >> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
> > >> >> <je...@spaggiari.org> wrote:
> > >> >> > Hi Pavan,
> > >> >> >
> > >> >> > Are you looking for something like
> > >> >> >
> > >> >>
> > >>
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
> > >> >> ?
> > >> >> >
> > >> >> > You are going to do a table full scan... If you value is uniq,
> you
> > >> might
> > >> >> > want to build a secondary index table for direct access...
> > >> >> >
> > >> >> > JM
> > >> >> >
> > >> >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> > >> >> >
> > >> >> >> How do i get the row key by specifying a row value assuming row
> > >> values
> > >> >> >> are unique?
> > >> >> >>
> > >> >> >> What API should i use for this purpose?
> > >> >> >> --
> > >> >> >> Regards-
> > >> >> >> Pavan
> > >> >> >>
> > >> >>
> > >> >>
> > >> >>
> > >> >> --
> > >> >> Regards-
> > >> >> Pavan
> > >> >>
> > >>
> > >>
> > >>
> > >> --
> > >> Regards-
> > >> Pavan
> > >>
> >
> >
> >
> > --
> > Regards-
> > Pavan
> >
>
Re: How to get row key from row value?
Posted by Shahab Yunus <sh...@gmail.com>.
Please correct me if I am wrong but I think there is as such no hard and
fast technique for it. There are no constructs or method to this
specifically in HBase. Your client while writing have to make sure to write
to both tables: 1) the main table 2) and the secondary index table.
Basically it is up to you according to the use-case and application. You
can delegate this to a sort of a middle (separate layer from client app at
least) which takes care of maintaing consistency between the two tables.
This layer will be used for both read and write to implement and handle
your indexing. The one obvious issue that you need to take into
consideration is atomicity and consistency of the two tables.
Regards,
Shahab
On Wed, Jul 31, 2013 at 9:37 AM, Pavan Sudheendra <pa...@gmail.com>wrote:
> Yes perfect. Could i get few examples on how to create a secondary lookup
> table?
>
>
> On Wed, Jul 31, 2013 at 7:01 PM, Jean-Marc Spaggiari
> <je...@spaggiari.org> wrote:
> > Hi Pavan,
> >
> > for your lookup table, you need to lookup on the value? Not on the they?
> If
> > that's the case, just "revert" your table into a secondary index lookup
> > table where the value will be the key, and the key will be the value.
> That
> > way you just to a get on this secondary index lookup table instead of
> doing
> > a scan...
> >
> > Make sense?
> >
> > JM
> >
> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> >
> >> Before inserting a row in my main table, i need to do a lookup on my
> >> lookup table. I'm really not sure what logic has to be behind this.
> >> Should i do a full table scan of the lookup table every single time i
> >> insert in the main table?
> >>
> >> Thanks jean
> >>
> >>
> >>
> >> On Wed, Jul 31, 2013 at 6:10 PM, Jean-Marc Spaggiari
> >> <je...@spaggiari.org> wrote:
> >> > the best way is to insert on your lookup table each time you insert on
> >> your
> >> > main table. That way you don't have to scan your entire main table to
> >> build
> >> > the lookup table...
> >> >
> >> > If you want to filter by CF you can look at
> >> >
> >>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
> >> > .
> >> >
> >> > Basically, you have all the filters listed there:
> >> >
> >>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
> >> >
> >> > You should be able to find one which match your needs.
> >> >
> >> > JM
> >> >
> >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> >> >
> >> >> Hi Jean,
> >> >> Is there a way to specify column family, column qualifier and column
> >> >> value to get the row key without having to scan the table every
> single
> >> >> time?
> >> >> Basically, i'm building a lookup table which helps in insertion of
> >> >> another HBase table. its quite complicated to explain.
> >> >>
> >> >> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
> >> >> <je...@spaggiari.org> wrote:
> >> >> > Hi Pavan,
> >> >> >
> >> >> > Are you looking for something like
> >> >> >
> >> >>
> >>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
> >> >> ?
> >> >> >
> >> >> > You are going to do a table full scan... If you value is uniq, you
> >> might
> >> >> > want to build a secondary index table for direct access...
> >> >> >
> >> >> > JM
> >> >> >
> >> >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> >> >> >
> >> >> >> How do i get the row key by specifying a row value assuming row
> >> values
> >> >> >> are unique?
> >> >> >>
> >> >> >> What API should i use for this purpose?
> >> >> >> --
> >> >> >> Regards-
> >> >> >> Pavan
> >> >> >>
> >> >>
> >> >>
> >> >>
> >> >> --
> >> >> Regards-
> >> >> Pavan
> >> >>
> >>
> >>
> >>
> >> --
> >> Regards-
> >> Pavan
> >>
>
>
>
> --
> Regards-
> Pavan
>
Re: How to get row key from row value?
Posted by Pavan Sudheendra <pa...@gmail.com>.
Yes perfect. Could i get few examples on how to create a secondary lookup table?
On Wed, Jul 31, 2013 at 7:01 PM, Jean-Marc Spaggiari
<je...@spaggiari.org> wrote:
> Hi Pavan,
>
> for your lookup table, you need to lookup on the value? Not on the they? If
> that's the case, just "revert" your table into a secondary index lookup
> table where the value will be the key, and the key will be the value. That
> way you just to a get on this secondary index lookup table instead of doing
> a scan...
>
> Make sense?
>
> JM
>
> 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
>
>> Before inserting a row in my main table, i need to do a lookup on my
>> lookup table. I'm really not sure what logic has to be behind this.
>> Should i do a full table scan of the lookup table every single time i
>> insert in the main table?
>>
>> Thanks jean
>>
>>
>>
>> On Wed, Jul 31, 2013 at 6:10 PM, Jean-Marc Spaggiari
>> <je...@spaggiari.org> wrote:
>> > the best way is to insert on your lookup table each time you insert on
>> your
>> > main table. That way you don't have to scan your entire main table to
>> build
>> > the lookup table...
>> >
>> > If you want to filter by CF you can look at
>> >
>> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
>> > .
>> >
>> > Basically, you have all the filters listed there:
>> >
>> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
>> >
>> > You should be able to find one which match your needs.
>> >
>> > JM
>> >
>> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
>> >
>> >> Hi Jean,
>> >> Is there a way to specify column family, column qualifier and column
>> >> value to get the row key without having to scan the table every single
>> >> time?
>> >> Basically, i'm building a lookup table which helps in insertion of
>> >> another HBase table. its quite complicated to explain.
>> >>
>> >> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
>> >> <je...@spaggiari.org> wrote:
>> >> > Hi Pavan,
>> >> >
>> >> > Are you looking for something like
>> >> >
>> >>
>> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
>> >> ?
>> >> >
>> >> > You are going to do a table full scan... If you value is uniq, you
>> might
>> >> > want to build a secondary index table for direct access...
>> >> >
>> >> > JM
>> >> >
>> >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
>> >> >
>> >> >> How do i get the row key by specifying a row value assuming row
>> values
>> >> >> are unique?
>> >> >>
>> >> >> What API should i use for this purpose?
>> >> >> --
>> >> >> Regards-
>> >> >> Pavan
>> >> >>
>> >>
>> >>
>> >>
>> >> --
>> >> Regards-
>> >> Pavan
>> >>
>>
>>
>>
>> --
>> Regards-
>> Pavan
>>
--
Regards-
Pavan
Re: How to get row key from row value?
Posted by Jean-Marc Spaggiari <je...@spaggiari.org>.
Hi Pavan,
for your lookup table, you need to lookup on the value? Not on the they? If
that's the case, just "revert" your table into a secondary index lookup
table where the value will be the key, and the key will be the value. That
way you just to a get on this secondary index lookup table instead of doing
a scan...
Make sense?
JM
2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> Before inserting a row in my main table, i need to do a lookup on my
> lookup table. I'm really not sure what logic has to be behind this.
> Should i do a full table scan of the lookup table every single time i
> insert in the main table?
>
> Thanks jean
>
>
>
> On Wed, Jul 31, 2013 at 6:10 PM, Jean-Marc Spaggiari
> <je...@spaggiari.org> wrote:
> > the best way is to insert on your lookup table each time you insert on
> your
> > main table. That way you don't have to scan your entire main table to
> build
> > the lookup table...
> >
> > If you want to filter by CF you can look at
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
> > .
> >
> > Basically, you have all the filters listed there:
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
> >
> > You should be able to find one which match your needs.
> >
> > JM
> >
> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> >
> >> Hi Jean,
> >> Is there a way to specify column family, column qualifier and column
> >> value to get the row key without having to scan the table every single
> >> time?
> >> Basically, i'm building a lookup table which helps in insertion of
> >> another HBase table. its quite complicated to explain.
> >>
> >> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
> >> <je...@spaggiari.org> wrote:
> >> > Hi Pavan,
> >> >
> >> > Are you looking for something like
> >> >
> >>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
> >> ?
> >> >
> >> > You are going to do a table full scan... If you value is uniq, you
> might
> >> > want to build a secondary index table for direct access...
> >> >
> >> > JM
> >> >
> >> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> >> >
> >> >> How do i get the row key by specifying a row value assuming row
> values
> >> >> are unique?
> >> >>
> >> >> What API should i use for this purpose?
> >> >> --
> >> >> Regards-
> >> >> Pavan
> >> >>
> >>
> >>
> >>
> >> --
> >> Regards-
> >> Pavan
> >>
>
>
>
> --
> Regards-
> Pavan
>
Re: How to get row key from row value?
Posted by Pavan Sudheendra <pa...@gmail.com>.
Before inserting a row in my main table, i need to do a lookup on my
lookup table. I'm really not sure what logic has to be behind this.
Should i do a full table scan of the lookup table every single time i
insert in the main table?
Thanks jean
On Wed, Jul 31, 2013 at 6:10 PM, Jean-Marc Spaggiari
<je...@spaggiari.org> wrote:
> the best way is to insert on your lookup table each time you insert on your
> main table. That way you don't have to scan your entire main table to build
> the lookup table...
>
> If you want to filter by CF you can look at
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
> .
>
> Basically, you have all the filters listed there:
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
>
> You should be able to find one which match your needs.
>
> JM
>
> 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
>
>> Hi Jean,
>> Is there a way to specify column family, column qualifier and column
>> value to get the row key without having to scan the table every single
>> time?
>> Basically, i'm building a lookup table which helps in insertion of
>> another HBase table. its quite complicated to explain.
>>
>> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
>> <je...@spaggiari.org> wrote:
>> > Hi Pavan,
>> >
>> > Are you looking for something like
>> >
>> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
>> ?
>> >
>> > You are going to do a table full scan... If you value is uniq, you might
>> > want to build a secondary index table for direct access...
>> >
>> > JM
>> >
>> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
>> >
>> >> How do i get the row key by specifying a row value assuming row values
>> >> are unique?
>> >>
>> >> What API should i use for this purpose?
>> >> --
>> >> Regards-
>> >> Pavan
>> >>
>>
>>
>>
>> --
>> Regards-
>> Pavan
>>
--
Regards-
Pavan
Re: How to get row key from row value?
Posted by Jean-Marc Spaggiari <je...@spaggiari.org>.
the best way is to insert on your lookup table each time you insert on your
main table. That way you don't have to scan your entire main table to build
the lookup table...
If you want to filter by CF you can look at
http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/FamilyFilter.html
.
Basically, you have all the filters listed there:
http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/package-summary.html
You should be able to find one which match your needs.
JM
2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> Hi Jean,
> Is there a way to specify column family, column qualifier and column
> value to get the row key without having to scan the table every single
> time?
> Basically, i'm building a lookup table which helps in insertion of
> another HBase table. its quite complicated to explain.
>
> On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
> <je...@spaggiari.org> wrote:
> > Hi Pavan,
> >
> > Are you looking for something like
> >
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html
> ?
> >
> > You are going to do a table full scan... If you value is uniq, you might
> > want to build a secondary index table for direct access...
> >
> > JM
> >
> > 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> >
> >> How do i get the row key by specifying a row value assuming row values
> >> are unique?
> >>
> >> What API should i use for this purpose?
> >> --
> >> Regards-
> >> Pavan
> >>
>
>
>
> --
> Regards-
> Pavan
>
Re: How to get row key from row value?
Posted by Pavan Sudheendra <pa...@gmail.com>.
Hi Jean,
Is there a way to specify column family, column qualifier and column
value to get the row key without having to scan the table every single
time?
Basically, i'm building a lookup table which helps in insertion of
another HBase table. its quite complicated to explain.
On Wed, Jul 31, 2013 at 5:53 PM, Jean-Marc Spaggiari
<je...@spaggiari.org> wrote:
> Hi Pavan,
>
> Are you looking for something like
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html?
>
> You are going to do a table full scan... If you value is uniq, you might
> want to build a secondary index table for direct access...
>
> JM
>
> 2013/7/31 Pavan Sudheendra <pa...@gmail.com>
>
>> How do i get the row key by specifying a row value assuming row values
>> are unique?
>>
>> What API should i use for this purpose?
>> --
>> Regards-
>> Pavan
>>
--
Regards-
Pavan
Re: How to get row key from row value?
Posted by Jean-Marc Spaggiari <je...@spaggiari.org>.
Hi Pavan,
Are you looking for something like
http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ValueFilter.html?
You are going to do a table full scan... If you value is uniq, you might
want to build a secondary index table for direct access...
JM
2013/7/31 Pavan Sudheendra <pa...@gmail.com>
> How do i get the row key by specifying a row value assuming row values
> are unique?
>
> What API should i use for this purpose?
> --
> Regards-
> Pavan
>