Database Reference
In-Depth Information
minTimeuuid()
and
maxTimeuuid()
The
minTimeuuid
and
maxTimeuuid
functions are used when querying
ranges of
TimeUUID
s by their embedded time. When using these methods, it
is important to note that they do
not
generate RFC-4122-compliant UUIDs. This
means that the values returned are not guaranteed to be globally unique and there-
fore should be used only when querying data and never for inserting data. The
functions take a parameter that is compatible with the timestamp type. See
Listing
4.1
for example usage.
Listing 4.1
Example Usage of
minTimeuuid()
and
maxTimeuuid()
SELECT *
FROM events
WHERE event_time > maxTimeuuid('2013-01-01
00:05+0000')
AND event_time < minTimeuuid('2013-02-02
10:00+0000')
dateOf()
and
unixTimestampOf()
The
dateOf
and
unixTimestampOf
functions take an argument of
TimeUUID
and return the timestamp in it. The
dateOf
method will return a type
of
timestamp
, whereas the
unixTimestampOf
method will return a
bi-
gint
that is representative of the number of milliseconds since the UNIX epoch.
Commands
CQL 3 supports a subset of the SQL commands. In the following sections, we will
describe the commands that are currently supported and show example usage of
each one.
