Is it possible to use a timestamp in ms since epoch in select statement for Cassandra? -


i know using formats listed here (http://docs.datastax.com/en/cql/3.0/cql/cql_reference/timestamp_type_r.html) work query cassandra. however, i'm having hard time determining if possible use ms since epoch in select statement.

i feel should since data can sent cassandra in ms since epoch (from above: timestamp type can entered integer cql input), attempts have failed , can't find documentation saying either way.

thanks!

yes, can use integer timestamps in select statements.

cassandra@cqlsh:testkeyspace> create table test (key int, ts timestamp, v int, primary key (key, ts)); cassandra@cqlsh:testkeyspace> insert test (key, ts, v) values (0, 1434741481000, 0); cassandra@cqlsh:testkeyspace> insert test (key, ts, v) values (0, 1434741481001, 1); cassandra@cqlsh:testkeyspace> insert test (key, ts, v) values (0, 1434741481002, 2); cassandra@cqlsh:testkeyspace> select ts, v test key = 0;   ts                       | v --------------------------+---  2015-06-19 14:18:01-0500 | 0  2015-06-19 14:18:01-0500 | 1  2015-06-19 14:18:01-0500 | 2  (3 rows) cassandra@cqlsh:testkeyspace> select ts, v test key=0 , ts >= 1434741481001;   ts                       | v --------------------------+---  2015-06-19 14:18:01-0500 | 1  2015-06-19 14:18:01-0500 | 2  (2 rows)

Comments

Post a Comment

Popular posts from this blog

twig - Using Twigbridge in a Laravel 5.1 Package -

i'm trying create laravel 5.1 package uses twigbridge instead of .php views. can normal .php views display fine, when try make use of .twig templates i'm met error. possible use twigbridge templates when creating views laravel package or pretty stuck blade , php ? edit 1: loading twig template without extending works. it's when start using {% extends 'file' %} error comes out. i error error loading /virtual/laravel/packages/username/mypackage/src/views/sample.twig: template "templates.master" not defined () in "/virtual/laravel/packages/username/mypackage/src/views/sample.twig" @ line 1. my folders username |_ mypackage |_ src |_ controllers - samplecontroller.php |_ views |_ templates - master.twig - sample.twig twig template sample.twig {% extends 'templates.master' %} {% block content %} {{ parent() ...
Read more

jdbc - Not able to establish database connection in eclipse -

i want make new database connection (db2) in eclipse purpose of using jpa. in jpa perspective, in data source explorer view, when try create new db connection, receive following logs when try ping server. org.eclipse.datatools.connectivity.exceptions.dbnotstartexception: no start database command issued. errorcode = -4499, sqlstate = 08001. @ org.eclipse.datatools.enablement.ibm.db2.internal.luw.jdbcluwjdbcconnection.getconnectexception(jdbcluwjdbcconnection.java:74) @ org.eclipse.datatools.connectivity.ui.pingjob.gettestconnectionexception(pingjob.java:81) @ org.eclipse.datatools.connectivity.ui.pingjob.run(pingjob.java:63) @ org.eclipse.core.internal.jobs.worker.run(worker.java:54) caused by: com.ibm.db2.jcc.am.ro: [jcc][t4][2043][11550][4.8.87] exception java.net.connectexception: error opening socket server example.example.com/51.37.93.117 on port 50,000 message: connection timed out: connect. errorcode=-4499, sqlstate=08001 @ com.ibm.db2.jcc.am.gd.a(gd.j...
Read more

firemonkey - How do I make a beep sound in Android using Delphi and the API? -

after having @ androidapi.jni.media.pas, coded following procedure: uses androidapi.jnibridge, androidapi.jni.media; procedure sound(aduration: integer); implementation procedure sound(aduration: integer); var volume: integer; streamtype: integer; tonetype: integer; tonegenerator: jtonegenerator; begin volume := tjtonegenerator.javaclass.max_volume; streamtype := ? tonetype := tjtonegenerator.javaclass.tone_dtmf_0; tonegenerator := tjtonegenerator.javaclass.init(streamtype, volume); tonegenerator.starttone(tonetype, aduration); end; but can't figure out how set value streamtype? thanks the stream type identify stream on beep must played. integer between 0 , 4 : stream_voice_call (0) stream_system (1) stream_ring (2) stream_music(3) stream_alarm(4)
Read more