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Spark SQL - session_window Function

event 2022-08-16 visibility 223 comment 0 insights
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Code description

Spark SQL has built-in function session_window to create a window column based on a timestamp column and gap duration. The syntax of the function looks like the following:

session_window(timeColumn: ColumnOrName, gapDuration: [pyspark.sql.column.Column, str])

This function is available from Spark 3.2.0.

*These SQL statements can be directly used in PySpark DataFrame APIs too via spark.sql function.

This code snippet prints out the following output:

2022-08-01 12:01:00     {"start":2022-08-01 12:01:00,"end":2022-08-01 12:31:00}
2022-08-01 12:15:00     {"start":2022-08-01 12:15:00,"end":2022-08-01 12:45:00}
2022-08-01 12:31:01     {"start":2022-08-01 12:31:01,"end":2022-08-01 13:01:01}

Code snippet

with t as (
select timestamp('2022-08-01 12:01:00') as ts 
UNION ALL select timestamp('2022-08-01 12:15:00') 
UNION ALL select timestamp('2022-08-01 12:31:01')
)
select t.ts, session_window(t.ts, '30 minutes') from t;
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