Re: [PERFORM] Filter certain range of IP address.

[vinny]

On 2017-04-07 17:29, David G. Johnston wrote:

On Fri, Apr 7, 2017 at 8:18 AM, Dinesh Chandra 12108
 wrote:


Dear Vinny,

Thanks for your valuable replay.

but I need a select query, which select only that record which
starts from IP "172.23.110" only from below table.

xxx 172.23.110.175
yyy 172.23.110.178
zzz 172.23.110.177
aaa 172.23.110.176
bbb 172.23.111.180
ccc 172.23.115.26


​SELECT ... WHERE substring(ip_addr::text, 1, 10) = '172.23.110'

David J.
 ​


While it's certainly possible to do it with a substring(), I'd strongly 
advise against it,
for several reasons, but the main one is that it does not take into 
account what happens to the presentation of the IP address when cast to 
a string. There might be some conditions that cause it to render as 
'172.023.110' instead of '172.23.110' just like numbers can be rendered 
as '1.234,56' or '1,234.56' depending on locale, and that would break 
the functionality without throwing an error.


Generally speaking; if you find yourself using a substring() on a 
datatype other than a string,
you should check if there isn't an operator that already can do what you 
want to do. PostgreSQL has operators
to do all the basic things with the datatypes it supports, so you don't 
have to re-invent the wheel. :-)



--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

Re: [PERFORM] Filter certain range of IP address.

[Moreno Andreo]

  
  
Il 07/04/2017 17:56, Rick Otten ha
  scritto:


  

  On Fri, Apr 7, 2017 at 11:29 AM,
David G. Johnston 
wrote:

  
On Fri, Apr 7,
2017 at 8:18 AM, Dinesh Chandra 12108  wrote:


  
Dear Vinny,
  
  Thanks for your valuable replay.
  
  but I need a select query, which select only that
  record which starts from IP "172.23.110" only from
  below table.
  
  xxx     172.23.110.175
  yyy     172.23.110.178
  zzz     172.23.110.177
  aaa     172.23.110.176
  bbb     172.23.111.180
  ccc     172.23.115.26



​SELECT
  ... WHERE substring(ip_addr::text, 1, 10) =
  '172.23.110'
  

  



or
   select ... where ip_addr
  << '172.23.110/32';
  

  

/32 is for one address only (fourth byte, which we want to exclude),
so we need to use /24 (as for CIDR notation), that would be equal to
a 255.255.255.0 subnet mask.

My 2 cents
Moreno


  

Re: [PERFORM] Filter certain range of IP address.

[Dinesh Chandra 12108]

Thanks.

It’s working fine.
Thank you so much

Regards,
Dinesh Chandra
|Database administrator (Oracle/PostgreSQL)| Cyient Ltd. Noida.
--
Mobile: +91-9953975849 | Ext 1078 
|dinesh.chan...@cyient.com<mailto:%7cdinesh.chan...@cyient.com>
Plot No. 7, NSEZ, Phase-II ,Noida-Dadri Road, Noida - 201 305,India.

From: Rick Otten [mailto:rottenwindf...@gmail.com]
Sent: 07 April, 2017 9:26 PM
To: David G. Johnston <david.g.johns...@gmail.com>
Cc: Dinesh Chandra 12108 <dinesh.chan...@cyient.com>; vinny <vi...@xs4all.nl>; 
pgsql-performance-ow...@postgresql.org; pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Filter certain range of IP address.



On Fri, Apr 7, 2017 at 11:29 AM, David G. Johnston 
<david.g.johns...@gmail.com<mailto:david.g.johns...@gmail.com>> wrote:
On Fri, Apr 7, 2017 at 8:18 AM, Dinesh Chandra 12108 
<dinesh.chan...@cyient.com<mailto:dinesh.chan...@cyient.com>> wrote:
Dear Vinny,

Thanks for your valuable replay.

but I need a select query, which select only that record which starts from IP 
"172.23.110" only from below table.

xxx 172.23.110.175
yyy 172.23.110.178
zzz 172.23.110.177
aaa 172.23.110.176
bbb 172.23.111.180
ccc 172.23.115.26

​SELECT ... WHERE substring(ip_addr::text, 1, 10) = '172.23.110'

or
   select ... where ip_addr << '172.23.110/32';

if ip_addr is an inet data type -- 
https://www.postgresql.org/docs/9.6/static/functions-net.html

Re: [PERFORM] Filter certain range of IP address.

[Rick Otten]

On Fri, Apr 7, 2017 at 11:29 AM, David G. Johnston <
david.g.johns...@gmail.com> wrote:

> On Fri, Apr 7, 2017 at 8:18 AM, Dinesh Chandra 12108 <
> dinesh.chan...@cyient.com> wrote:
>
>> Dear Vinny,
>>
>> Thanks for your valuable replay.
>>
>> but I need a select query, which select only that record which starts
>> from IP "172.23.110" only from below table.
>>
>> xxx 172.23.110.175
>> yyy 172.23.110.178
>> zzz 172.23.110.177
>> aaa 172.23.110.176
>> bbb 172.23.111.180
>> ccc 172.23.115.26
>>
>
> ​SELECT ... WHERE substring(ip_addr::text, 1, 10) = '172.23.110'
>

or
   select ... where ip_addr << '172.23.110/32';

if ip_addr is an inet data type -- https://www.postgresql.org/
docs/9.6/static/functions-net.html

Re: [PERFORM] Filter certain range of IP address.

[David G. Johnston]

On Fri, Apr 7, 2017 at 8:18 AM, Dinesh Chandra 12108 <
dinesh.chan...@cyient.com> wrote:

> Dear Vinny,
>
> Thanks for your valuable replay.
>
> but I need a select query, which select only that record which starts from
> IP "172.23.110" only from below table.
>
> xxx 172.23.110.175
> yyy 172.23.110.178
> zzz 172.23.110.177
> aaa 172.23.110.176
> bbb 172.23.111.180
> ccc 172.23.115.26
>

​SELECT ... WHERE substring(ip_addr::text, 1, 10) = '172.23.110'

David J.
 ​

Re: [PERFORM] Filter certain range of IP address.

[Dinesh Chandra 12108]

Dear Vinny,

Thanks for your valuable replay.

but I need a select query, which select only that record which starts from IP 
"172.23.110" only from below table.

xxx 172.23.110.175
yyy 172.23.110.178
zzz 172.23.110.177
aaa 172.23.110.176
bbb 172.23.111.180
ccc 172.23.115.26

Regards,
Dinesh Chandra
|Database administrator (Oracle/PostgreSQL)| Cyient Ltd. Noida.
--
Mobile: +91-9953975849 | Ext 1078 |dinesh.chan...@cyient.com 
Plot No. 7, NSEZ, Phase-II ,Noida-Dadri Road, Noida - 201 305,India.

-Original Message-
From: vinny [mailto:vi...@xs4all.nl] 
Sent: 07 April, 2017 7:52 PM
To: Dinesh Chandra 12108 <dinesh.chan...@cyient.com>
Cc: pgsql-performance-ow...@postgresql.org; pgsql-performance@postgresql.org
Subject: Re: [PERFORM] Filter certain range of IP address.

On 2017-04-07 16:13, Dinesh Chandra 12108 wrote:
> Hi expert,
> 
> May I know how to select a range of IP address.
> 
> Example: I have number of different-2 IP's present in a table.
> 
> I HAVE TO SELECT ONLY THAT IP ADDRESS WHICH DOES NOT START FROM PREFIX 
> “172.23.110”.
> 
> Thanks in advance
> 
> REGARDS,
> 
> DINESH CHANDRA
> 
> |DATABASE ADMINISTRATOR (ORACLE/POSTGRESQL)| CYIENT LTD. NOIDA.
> 
> --
> 
> Mobile: +91-9953975849 | Ext 1078 |dinesh.chan...@cyient.com
> 
> Plot No. 7, NSEZ, Phase-II ,Noida-Dadri Road, Noida - 201 305,India.


If you store the ip address as the INET datatype then you can use the INET 
operators to see if any arbitraty number of bits match, the first 3 bytes means 
the first 24 bits:


SELECT '172.23.110.55'::inet << '172.23.110.1/24'::inet;
  ?column?
--
  t
(1 row)


SELECT '272.23.110.55'::inet << '172.23.110.1/24'::inet;
  ?column?
--
  f
(1 row)

See also: https://www.postgresql.org/docs/9.3/static/functions-net.html

-- 
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

Re: [PERFORM] Filter certain range of IP address.

[vinny]

On 2017-04-07 16:13, Dinesh Chandra 12108 wrote:

Hi expert,

May I know how to select a range of IP address.

Example: I have number of different-2 IP's present in a table.

I HAVE TO SELECT ONLY THAT IP ADDRESS WHICH DOES NOT START FROM PREFIX
“172.23.110”.

Thanks in advance

REGARDS,

DINESH CHANDRA

|DATABASE ADMINISTRATOR (ORACLE/POSTGRESQL)| CYIENT LTD. NOIDA.

--

Mobile: +91-9953975849 | Ext 1078 |dinesh.chan...@cyient.com

Plot No. 7, NSEZ, Phase-II ,Noida-Dadri Road, Noida - 201 305,India.



If you store the ip address as the INET datatype then you can use the 
INET operators
to see if any arbitraty number of bits match, the first 3 bytes means 
the first 24 bits:



SELECT '172.23.110.55'::inet << '172.23.110.1/24'::inet;
 ?column?
--
 t
(1 row)


SELECT '272.23.110.55'::inet << '172.23.110.1/24'::inet;
 ?column?
--
 f
(1 row)

See also: https://www.postgresql.org/docs/9.3/static/functions-net.html


--
Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

[PERFORM] Filter certain range of IP address.

[Dinesh Chandra 12108]

Hi expert,

May I know how to select a range of IP address.

Example: I have number of different-2 IP's present in a table.

I have to select only that IP address which does not start from prefix 
"172.23.110".
Thanks in advance

Regards,
Dinesh Chandra
|Database administrator (Oracle/PostgreSQL)| Cyient Ltd. Noida.
--
Mobile: +91-9953975849 | Ext 1078 
|dinesh.chan...@cyient.com
Plot No. 7, NSEZ, Phase-II ,Noida-Dadri Road, Noida - 201 305,India.