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R
sparklyr

stream_watermark

Watermark Stream

Description

Ensures a stream has a watermark defined, which is required for some operations over streams.

Usage

stream_watermark(x, column = "timestamp", threshold = "10 minutes")

Arguments

x

An object coercable to a Spark Streaming DataFrame.
column

The name of the column that contains the event time of the row, if the column is missing, a column with the current time will be added.
threshold

The minimum delay to wait to data to arrive late, defaults to ten minutes.
sparklyr

R Interface to Apache Spark

v1.6.2
Apache License 2.0 | file LICENSE
Authors
Javier Luraschi [aut], Kevin Kuo [aut] (<https://orcid.org/0000-0001-7803-7901>), Kevin Ushey [aut], JJ Allaire [aut], Samuel Macedo [ctb], Hossein Falaki [aut], Lu Wang [aut], Andy Zhang [aut], Yitao Li [aut, cre] (<https://orcid.org/0000-0002-1261-905X>), Jozef Hajnala [ctb], Maciej Szymkiewicz [ctb] (<https://orcid.org/0000-0003-1469-9396>), Wil Davis [ctb], RStudio [cph], The Apache Software Foundation [aut, cph]
Initial release

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