Hbase: Is possible to filter by integer value if the value is saved as string?
I don't think it is possible, but would like to confirm with smart folks out there. Supposing I have a cell storing an integer but in string presentation. For example, here is how I put a value of 200: put.add(family, qualifier, Bytes.toBytes(200)); Now, I want to scan with a filter that only return if the value is larger than 250. Is that possible? Thanks in advance Frank
Re: Hbase: Is possible to filter by integer value if the value is saved as string?
Looks like you should be able to do so by passing your own comparator to:
public SingleColumnValueFilter(final byte [] family, final byte []
qualifier,
final CompareOp compareOp, final ByteArrayComparable comparator) {
Cheers
On Thu, Jul 18, 2013 at 1:20 PM, Frank Luo j...@merkleinc.com wrote:
I don't think it is possible, but would like to confirm with smart folks
out there.
Supposing I have a cell storing an integer but in string presentation. For
example, here is how I put a value of 200:
put.add(family, qualifier, Bytes.toBytes(200));
Now, I want to scan with a filter that only return if the value is larger
than 250. Is that possible?
Thanks in advance
Frank
RE: Hbase: Is possible to filter by integer value if the value is saved as string?
That requires creating my own ByteArrayComparable class and deploy to all
servers, right?
My company doesn't want to customize hbase, hence is not an option to me.
-Original Message-
From: Ted Yu [mailto:yuzhih...@gmail.com]
Sent: Thursday, July 18, 2013 3:25 PM
To: user@hbase.apache.org
Subject: Re: Hbase: Is possible to filter by integer value if the value is
saved as string?
Looks like you should be able to do so by passing your own comparator to:
public SingleColumnValueFilter(final byte [] family, final byte [] qualifier,
final CompareOp compareOp, final ByteArrayComparable comparator) { Cheers
On Thu, Jul 18, 2013 at 1:20 PM, Frank Luo j...@merkleinc.com wrote:
I don't think it is possible, but would like to confirm with smart
folks out there.
Supposing I have a cell storing an integer but in string presentation.
For example, here is how I put a value of 200:
put.add(family, qualifier, Bytes.toBytes(200));
Now, I want to scan with a filter that only return if the value is
larger than 250. Is that possible?
Thanks in advance
Frank
Bulk Load on HBase 0.95.1-hadoop1
I was trying to follow the instructions from thishttp://www.thecloudavenue.com/2013/04/bulk-loading-data-in-hbase.htmlwebsite to insert a lot of data to HBase using MapReduce, but as with other approaches I found on the web I have always the same problem: I have compile erros because classes from package org.apache.hadoop.hbase.mapreduce.* cannot be found. To run a mapreduce task using HBase I have to downgrade the version of my HBase to, for example, 0.92? *Jonathan Cardoso** ** Universidade Federal de Goias*
Re: Bulk Load on HBase 0.95.1-hadoop1
0.95.1 is a developer preview release, if you are just starting with HBase please grab the stable release from 0.94, for example http://mirrors.sonic.net/apache/hbase/stable/ J-D On Thu, Jul 18, 2013 at 1:51 PM, Jonathan Cardoso jonathancar...@gmail.comwrote: I was trying to follow the instructions from thishttp://www.thecloudavenue.com/2013/04/bulk-loading-data-in-hbase.html website to insert a lot of data to HBase using MapReduce, but as with other approaches I found on the web I have always the same problem: I have compile erros because classes from package org.apache.hadoop.hbase.mapreduce.* cannot be found. To run a mapreduce task using HBase I have to downgrade the version of my HBase to, for example, 0.92? *Jonathan Cardoso** ** Universidade Federal de Goias*
Re: Bulk Load on HBase 0.95.1-hadoop1
0.95 currently has all of the map-reduce code located in hbase-server module. Check there if you are just trying to poke around. However like JD said this is a developer release so make sure you're aware there will be sharp edges. On Thu, Jul 18, 2013 at 1:55 PM, Jean-Daniel Cryans jdcry...@apache.org wrote: 0.95.1 is a developer preview release, if you are just starting with HBase please grab the stable release from 0.94, for example http://mirrors.sonic.net/apache/hbase/stable/ J-D On Thu, Jul 18, 2013 at 1:51 PM, Jonathan Cardoso jonathancar...@gmail.comwrote: I was trying to follow the instructions from thishttp://www.thecloudavenue.com/2013/04/bulk-loading-data-in-hbase.html website to insert a lot of data to HBase using MapReduce, but as with other approaches I found on the web I have always the same problem: I have compile erros because classes from package org.apache.hadoop.hbase.mapreduce.* cannot be found. To run a mapreduce task using HBase I have to downgrade the version of my HBase to, for example, 0.92? *Jonathan Cardoso** ** Universidade Federal de Goias*
Re: Hbase: Is possible to filter by integer value if the value is saved as string?
Sure, try using the BinaryComparator. For example,
BinaryComparator c = new BinaryComparator(Bytes.toBytes(200));
System.out.println(c.compareTo(Bytes.toBytes(201))); // returns -1
On Thu, Jul 18, 2013 at 4:28 PM, Frank Luo j...@merkleinc.com wrote:
That requires creating my own ByteArrayComparable class and deploy to all
servers, right?
My company doesn't want to customize hbase, hence is not an option to me.
-Original Message-
From: Ted Yu [mailto:yuzhih...@gmail.com]
Sent: Thursday, July 18, 2013 3:25 PM
To: user@hbase.apache.org
Subject: Re: Hbase: Is possible to filter by integer value if the value is
saved as string?
Looks like you should be able to do so by passing your own comparator to:
public SingleColumnValueFilter(final byte [] family, final byte []
qualifier,
final CompareOp compareOp, final ByteArrayComparable comparator) {
Cheers
On Thu, Jul 18, 2013 at 1:20 PM, Frank Luo j...@merkleinc.com wrote:
I don't think it is possible, but would like to confirm with smart
folks out there.
Supposing I have a cell storing an integer but in string presentation.
For example, here is how I put a value of 200:
put.add(family, qualifier, Bytes.toBytes(200));
Now, I want to scan with a filter that only return if the value is
larger than 250. Is that possible?
Thanks in advance
Frank
Re: Hbase: Is possible to filter by integer value if the value is saved as string?
What would happen to this ?
System.out.println(c.compareTo(Bytes.toBytes(30)));
On Thu, Jul 18, 2013 at 5:55 PM, Kevin kevin.macksa...@gmail.com wrote:
Sure, try using the BinaryComparator. For example,
BinaryComparator c = new BinaryComparator(Bytes.toBytes(200));
System.out.println(c.compareTo(Bytes.toBytes(201))); // returns
-1
On Thu, Jul 18, 2013 at 4:28 PM, Frank Luo j...@merkleinc.com wrote:
That requires creating my own ByteArrayComparable class and deploy to all
servers, right?
My company doesn't want to customize hbase, hence is not an option to
me.
-Original Message-
From: Ted Yu [mailto:yuzhih...@gmail.com]
Sent: Thursday, July 18, 2013 3:25 PM
To: user@hbase.apache.org
Subject: Re: Hbase: Is possible to filter by integer value if the value
is
saved as string?
Looks like you should be able to do so by passing your own comparator to:
public SingleColumnValueFilter(final byte [] family, final byte []
qualifier,
final CompareOp compareOp, final ByteArrayComparable comparator) {
Cheers
On Thu, Jul 18, 2013 at 1:20 PM, Frank Luo j...@merkleinc.com wrote:
I don't think it is possible, but would like to confirm with smart
folks out there.
Supposing I have a cell storing an integer but in string presentation.
For example, here is how I put a value of 200:
put.add(family, qualifier, Bytes.toBytes(200));
Now, I want to scan with a filter that only return if the value is
larger than 250. Is that possible?
Thanks in advance
Frank
Re: Bulk Load on HBase 0.95.1-hadoop1
Great! Thank you guys *Jonathan Cardoso** ** Universidade Federal de Goias* 2013/7/18 Elliott Clark ecl...@apache.org 0.95 currently has all of the map-reduce code located in hbase-server module. Check there if you are just trying to poke around. However like JD said this is a developer release so make sure you're aware there will be sharp edges. On Thu, Jul 18, 2013 at 1:55 PM, Jean-Daniel Cryans jdcry...@apache.org wrote: 0.95.1 is a developer preview release, if you are just starting with HBase please grab the stable release from 0.94, for example http://mirrors.sonic.net/apache/hbase/stable/ J-D On Thu, Jul 18, 2013 at 1:51 PM, Jonathan Cardoso jonathancar...@gmail.comwrote: I was trying to follow the instructions from this http://www.thecloudavenue.com/2013/04/bulk-loading-data-in-hbase.html website to insert a lot of data to HBase using MapReduce, but as with other approaches I found on the web I have always the same problem: I have compile erros because classes from package org.apache.hadoop.hbase.mapreduce.* cannot be found. To run a mapreduce task using HBase I have to downgrade the version of my HBase to, for example, 0.92? *Jonathan Cardoso** ** Universidade Federal de Goias*
How to join 2 tables using hadoop?
Hi, I know that HBase by default doesn't support table joins like RDBMS.. But anyway, I have a table who value contains a json with a particular ID in it.. This id references another table where it is a key.. I want to fetch the id first from table A , query table 2 and get its corresponding value.. What is the best way of achieving this using the MR framework? Apologizes, i'm still new to Hadoop and HBase so please go easy on me. Thanks for any help -- Regards- Pavan
Re: Hbase: Is possible to filter by integer value if the value is saved as string?
Only way to achieve this is to write your own ByteArrayComparable.
BinaryComparator wont work for your case.
But, I am wondering why you would store an Integer as String when you want
to do numerical comparison?
On Thu, Jul 18, 2013 at 6:03 PM, Ted Yu yuzhih...@gmail.com wrote:
What would happen to this ?
System.out.println(c.compareTo(Bytes.toBytes(30)));
On Thu, Jul 18, 2013 at 5:55 PM, Kevin kevin.macksa...@gmail.com wrote:
Sure, try using the BinaryComparator. For example,
BinaryComparator c = new BinaryComparator(Bytes.toBytes(200));
System.out.println(c.compareTo(Bytes.toBytes(201))); // returns
-1
On Thu, Jul 18, 2013 at 4:28 PM, Frank Luo j...@merkleinc.com wrote:
That requires creating my own ByteArrayComparable class and deploy to
all
servers, right?
My company doesn't want to customize hbase, hence is not an option to
me.
-Original Message-
From: Ted Yu [mailto:yuzhih...@gmail.com]
Sent: Thursday, July 18, 2013 3:25 PM
To: user@hbase.apache.org
Subject: Re: Hbase: Is possible to filter by integer value if the value
is
saved as string?
Looks like you should be able to do so by passing your own comparator
to:
public SingleColumnValueFilter(final byte [] family, final byte []
qualifier,
final CompareOp compareOp, final ByteArrayComparable comparator)
{
Cheers
On Thu, Jul 18, 2013 at 1:20 PM, Frank Luo j...@merkleinc.com wrote:
I don't think it is possible, but would like to confirm with smart
folks out there.
Supposing I have a cell storing an integer but in string
presentation.
For example, here is how I put a value of 200:
put.add(family, qualifier, Bytes.toBytes(200));
Now, I want to scan with a filter that only return if the value is
larger than 250. Is that possible?
Thanks in advance
Frank
--
Thanks Regards,
Anil Gupta
