openstack/deb-python-cassandra-driver
Code Issues Proposed changes

timestamp granularity doc fix (#799)

Browse Source 
PYTHON-717
This commit is contained in:
Jim Witschey 2017-07-17 09:05:57 -04:00 committed by GitHub
parent a51cae2055
commit e7c7d7bf27
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
docs/dates_and_times.rst
View File

@ -7,7 +7,7 @@ reasoning behind it, and describe approaches to working with these types.
timestamps (Cassandra DateType)
-------------------------------
Timestamps in Cassandra are timezone-naive timestamps encoded as microseconds since UNIX epoch. Clients working with
Timestamps in Cassandra are timezone-naive timestamps encoded as millseconds since UNIX epoch. Clients working with
timestamps in this database usually find it easiest to reason about them if they are always assumed to be UTC. To quote the
pytz documentation, "The preferred way of dealing with times is to always work in UTC, converting to localtime only when
generating output to be read by humans." The driver adheres to this tenant, and assumes UTC is always in the database. The
@ -34,7 +34,7 @@ Note the second point above applies even to "local" times created using ``now()`
These do not contain timezone information intrinsically, so they will be assumed to be UTC and not shifted. When generating
timestamps in the application, it is clearer to use ``datetime.utcnow()`` to be explicit about it.
If the input for a timestamp is numeric, it is assumed to be a epoch-relative microsecond timestamp, as specified in the
If the input for a timestamp is numeric, it is assumed to be a epoch-relative millisecond timestamp, as specified in the
CQL spec -- no scaling or conversion is done.
Read Path