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DATETIMECONVERT

This section contains reference documentation for the DATETIMECONVERT function.
Converts the value from a column that contains an epoch timestamp into another time unit and buckets based on the given time granularity.

Signature

DATETIMECONVERT(columnName, inputFormat, outputFormat, outputGranularity)
inputFormat and outputFormat are defined using the following structure:
<time size>:<time unit>:<time format>:<pattern>
where:
  • time size - size of the time unit eg: 1, 10
  • time unit - DAYS, HOURS, MINUTES, SECONDS, MILLISECONDS, MICROSECONDS, NANOSECONDS
  • time format
    • EPOCH
    • SIMPLE_DATE_FORMAT pattern - defined in case of SIMPLE_DATE_FORMAT e.g. yyyy-MM-dd. A specific timezone can be passed using tz(timezone). Timezone can be long or short string format timezone. e.g. Asia/Kolkata or PDT
granularity is specified in the format <time size>:<time unit>.

Usage Examples

These examples are based on the Batch JSON Quick Start.
created_at_timestamp from milliseconds since epoch to days since epoch, bucketed to 1 day granularity:
select id,
created_at_timestamp,
cast(created_at_timestamp AS long) AS timeInMs,
DATETIMECONVERT(
created_at_timestamp,
'1:MILLISECONDS:EPOCH',
'1:DAYS:EPOCH',
'1:DAYS'
) AS convertedTime
from githubEvents
WHERE id = 7044874134
id
created_at_timestamp
timeInMs
convertedTime
7044874134
2018-01-01 11:00:00.0
1514804402000
17532
created_at_timestamp bucketed to 15 minutes granularity:
select id,
created_at_timestamp,
cast(created_at_timestamp AS long) AS timeInMs,
DATETIMECONVERT(
created_at_timestamp,
'1:MILLISECONDS:EPOCH',
'1:MILLISECONDS:EPOCH',
'15:MINUTES'
) AS convertedTime
from githubEvents
WHERE id = 7044874134
id
created_at_timestamp
timeInMs
convertedTime
7044874134
2018-01-01 11:00:00.0
1514804402000
1514804400000
created_at_timestamp to format yyyy-MM-dd, bucketed to 1 days granularity:
select id,
created_at_timestamp,
cast(created_at_timestamp AS long) AS timeInMs,
DATETIMECONVERT(
created_at_timestamp,
'1:MILLISECONDS:EPOCH',
'1:DAYS:SIMPLE_DATE_FORMAT:yyyy-MM-dd',
'1:DAYS'
) AS convertedTime
from githubEvents
WHERE id = 7044874134
id
created_at_timestamp
timeInMs
convertedTime
7044874134
2018-01-01 11:00:00.0
1514804402000
2018-01-01
created_at_timestamp to format yyyy-MM-dd HH:mm, in timezone Pacific/Kiritimati:
select id,
created_at_timestamp,
cast(created_at_timestamp AS long) AS timeInMs,
DATETIMECONVERT(
created_at_timestamp,
'1:MILLISECONDS:EPOCH',
'1:MILLISECONDS:SIMPLE_DATE_FORMAT:yyyy-MM-dd HH:mm tz(Pacific/Kiritimati)',
'1:MILLISECONDS'
) AS convertedTime
from githubEvents
WHERE id = 7044874134
id
created_at_timestamp
timeInMs
convertedTime
7044874134
2018-01-01 11:00:00.0
1514804402000
2018-01-02 01:00
created_at_timestamp to format yyyy-MM-dd, in timezone Pacific/Kiritimati and bucketed to 1 day granularity:
select id,
created_at_timestamp,
cast(created_at_timestamp AS long) AS timeInMs,
DATETIMECONVERT(
created_at_timestamp,
'1:MILLISECONDS:EPOCH',
'1:MILLISECONDS:SIMPLE_DATE_FORMAT:yyyy-MM-dd HH:mm tz(Pacific/Kiritimati)',
'1:DAYS'
) AS convertedTime
from githubEvents
WHERE id = 7044874134
id
created_at_timestamp
timeInMs
convertedTime
7044874134
2018-01-01 11:00:00.0
1514804402000
2018-01-02 00:00
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