You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by Sujeet Kumar <ge...@gmail.com> on 2016/08/08 15:18:18 UTC
setting ttl using timestamp field of record during insertion in cassandra
Hi
I want to set TTL 30 days from the time field of table record(id,name,time)
during insertion.For this I am creating a User Defined Function(UDF) bigint
fun(rTime,cTime) as
CREATE FUNCTION fun(rtime timestamp,ctime timestamp) CALLED ON NULL INPUT
RETURNS bigint LANGUAGE java as 'return 2592000-((ctime.toTime()
-rtime.toTime())/1000);';
here,function fun is calculating the time in seconds this data should live.
2592000 is the time in seconds for 30 days.
I am trying to use above function for setting TTL as
INSERT INTO record(id,name,time) VALUES (123,'data123','2016-08-08
06:06:00') USING TTL fun('2016-08-08 06:06:00',totimestamp(now()));
getting error as
Syntax Exception: ErrorMessage code=2000 ........
Is there any other way to set ttl based on record time field. What is
problem with above approach.
Thanks.
Sujeet
--
--
Sujeet Kumar
ME(CSA)
IISc Banglore
sujeet.kumar@csa.iisc.ernet.in
sujeet.cse15@mnnit.ac.in
Re: setting ttl using timestamp field of record during insertion in cassandra
Posted by Sujeet Kumar <ge...@gmail.com>.
Thanks.Actually i want to start ttl from the record timestamp field, not
from insertion time(ttl starts from insertion time).
On Mon, Aug 8, 2016 at 9:36 PM, <SE...@homedepot.com> wrote:
> Perhaps you can set the default TTL when you create the table instead of
> on every insert:
>
> http://docs.datastax.com/en/cql/3.1/cql/cql_reference/tabProp.html
>
> (see default_time_to_live property)
>
>
>
> Then no need for UDF.
>
>
>
>
>
> Sean Durity
>
> lord of the (C*) rings (Lead Cassandra Admin)
>
> Big DATA Team
>
> MTC 2250
>
> #cassandra - for the latest news and updates
>
>
>
> *From:* Sujeet Kumar [mailto:genioussujeet@gmail.com]
> *Sent:* Monday, August 08, 2016 11:18 AM
> *To:* user@cassandra.apache.org
> *Subject:* setting ttl using timestamp field of record during insertion
> in cassandra
>
>
>
> Hi
>
>
>
> I want to set TTL 30 days from the time field of table
> record(id,name,time) during insertion.For this I am creating a User Defined
> Function(UDF) bigint fun(rTime,cTime) as
>
>
>
> CREATE FUNCTION fun(rtime timestamp,ctime timestamp) CALLED ON NULL INPUT
> RETURNS bigint LANGUAGE java as 'return 2592000-((ctime.toTime()
> -rtime.toTime())/1000);';
>
>
>
> here,function fun is calculating the time in seconds this data should
> live.
>
> 2592000 is the time in seconds for 30 days.
>
>
>
> I am trying to use above function for setting TTL as
>
>
>
> INSERT INTO record(id,name,time) VALUES (123,'data123','2016-08-08
> 06:06:00') USING TTL fun('2016-08-08 06:06:00',totimestamp(now()));
>
>
>
> getting error as
>
> Syntax Exception: ErrorMessage code=2000 ........
>
>
>
> Is there any other way to set ttl based on record time field. What is
> problem with above approach.
>
>
>
> Thanks.
>
>
>
> Sujeet
>
>
>
> --
>
>
>
> --
>
> Sujeet Kumar
>
> ME(CSA)
>
> IISc Banglore
>
> sujeet.kumar@csa.iisc.ernet.in
>
> sujeet.cse15@mnnit.ac.in
>
> ------------------------------
>
> The information in this Internet Email is confidential and may be legally
> privileged. It is intended solely for the addressee. Access to this Email
> by anyone else is unauthorized. If you are not the intended recipient, any
> disclosure, copying, distribution or any action taken or omitted to be
> taken in reliance on it, is prohibited and may be unlawful. When addressed
> to our clients any opinions or advice contained in this Email are subject
> to the terms and conditions expressed in any applicable governing The Home
> Depot terms of business or client engagement letter. The Home Depot
> disclaims all responsibility and liability for the accuracy and content of
> this attachment and for any damages or losses arising from any
> inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other
> items of a destructive nature, which may be contained in this attachment
> and shall not be liable for direct, indirect, consequential or special
> damages in connection with this e-mail message or its attachment.
>
--
--
Sujeet Kumar
ME(CSA)
IISc Banglore
sujeet.kumar@csa.iisc.ernet.in
sujeet.cse15@mnnit.ac.in
RE: setting ttl using timestamp field of record during insertion in
cassandra
Posted by SE...@homedepot.com.
Perhaps you can set the default TTL when you create the table instead of on every insert:
http://docs.datastax.com/en/cql/3.1/cql/cql_reference/tabProp.html
(see default_time_to_live property)
Then no need for UDF.
Sean Durity
lord of the (C*) rings (Lead Cassandra Admin)
Big DATA Team
MTC 2250
#cassandra - for the latest news and updates
From: Sujeet Kumar [mailto:genioussujeet@gmail.com]
Sent: Monday, August 08, 2016 11:18 AM
To: user@cassandra.apache.org
Subject: setting ttl using timestamp field of record during insertion in cassandra
Hi
I want to set TTL 30 days from the time field of table record(id,name,time) during insertion.For this I am creating a User Defined Function(UDF) bigint fun(rTime,cTime) as
CREATE FUNCTION fun(rtime timestamp,ctime timestamp) CALLED ON NULL INPUT RETURNS bigint LANGUAGE java as 'return 2592000-((ctime.toTime() -rtime.toTime())/1000);';
here,function fun is calculating the time in seconds this data should live.
2592000 is the time in seconds for 30 days.
I am trying to use above function for setting TTL as
INSERT INTO record(id,name,time) VALUES (123,'data123','2016-08-08 06:06:00') USING TTL fun('2016-08-08 06:06:00',totimestamp(now()));
getting error as
Syntax Exception: ErrorMessage code=2000 ........
Is there any other way to set ttl based on record time field. What is problem with above approach.
Thanks.
Sujeet
--
--
Sujeet Kumar
ME(CSA)
IISc Banglore
sujeet.kumar@csa.iisc.ernet.in<ma...@csa.iisc.ernet.in>
sujeet.cse15@mnnit.ac.in<ma...@mnnit.ac.in>
________________________________
The information in this Internet Email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this Email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this Email are subject to the terms and conditions expressed in any applicable governing The Home Depot terms of business or client engagement letter. The Home Depot disclaims all responsibility and liability for the accuracy and content of this attachment and for any damages or losses arising from any inaccuracies, errors, viruses, e.g., worms, trojan horses, etc., or other items of a destructive nature, which may be contained in this attachment and shall not be liable for direct, indirect, consequential or special damages in connection with this e-mail message or its attachment.