What is the difference between rowsBetween and rangeBetween?
From the PySpark docs rangeBetween
:
rangeBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative from the current row. For example, “0” means “current row”, while “-1” means one off before the current row, and “5” means the five off after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
while rowsBetween
rowsBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative positions from the current row. For example, “0” means “current row”, while “-1” means the row before the current row, and “5” means the fifth row after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
For rangeBetween
how is "1 off" different from "1 row", for example?
sql apache-spark pyspark apache-spark-sql window-functions
add a comment |
From the PySpark docs rangeBetween
:
rangeBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative from the current row. For example, “0” means “current row”, while “-1” means one off before the current row, and “5” means the five off after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
while rowsBetween
rowsBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative positions from the current row. For example, “0” means “current row”, while “-1” means the row before the current row, and “5” means the fifth row after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
For rangeBetween
how is "1 off" different from "1 row", for example?
sql apache-spark pyspark apache-spark-sql window-functions
add a comment |
From the PySpark docs rangeBetween
:
rangeBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative from the current row. For example, “0” means “current row”, while “-1” means one off before the current row, and “5” means the five off after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
while rowsBetween
rowsBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative positions from the current row. For example, “0” means “current row”, while “-1” means the row before the current row, and “5” means the fifth row after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
For rangeBetween
how is "1 off" different from "1 row", for example?
sql apache-spark pyspark apache-spark-sql window-functions
From the PySpark docs rangeBetween
:
rangeBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative from the current row. For example, “0” means “current row”, while “-1” means one off before the current row, and “5” means the five off after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
while rowsBetween
rowsBetween(start, end)
Defines the frame boundaries, from start (inclusive) to end (inclusive).
Both start and end are relative positions from the current row. For example, “0” means “current row”, while “-1” means the row before the current row, and “5” means the fifth row after the current row.
Parameters:
- start – boundary start, inclusive. The frame is unbounded if this is -sys.maxsize (or lower).
- end – boundary end, inclusive. The frame is unbounded if this is sys.maxsize (or higher).
New in version 1.4.
For rangeBetween
how is "1 off" different from "1 row", for example?
sql apache-spark pyspark apache-spark-sql window-functions
sql apache-spark pyspark apache-spark-sql window-functions
edited Sep 28 '18 at 4:32
Community♦
11
11
asked Oct 14 '16 at 17:32
Evan ZamirEvan Zamir
2,59133354
2,59133354
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add a comment |
1 Answer
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It is simple:
ROWS BETWEEN
doesn't care about the exact values. It cares only about the order of rows, and takes fixed number of preceding and following rows when computing frame.RANGE BETWEEN
considers values when computing frame.
Let's use an example using two window definitions:
ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW
and data as
+---+
| x|
+---+
| 10|
| 20|
| 30|
| 31|
+---+
Assuming the current row is the one with value 31 for the first window following rows will be included (current one, and two preceding):
+---+----------------------------------------------------+
| x|ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+----------------------------------------------------+
| 10| false|
| 20| true|
| 30| true|
| 31| true|
+---+----------------------------------------------------+
and for the second one following (current one, and all preceding where x >= 31 - 2):
+---+-----------------------------------------------------+
| x|ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+-----------------------------------------------------+
| 10| false|
| 20| false|
| 30| true|
| 31| true|
+---+-----------------------------------------------------+
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
It is simple:
ROWS BETWEEN
doesn't care about the exact values. It cares only about the order of rows, and takes fixed number of preceding and following rows when computing frame.RANGE BETWEEN
considers values when computing frame.
Let's use an example using two window definitions:
ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW
and data as
+---+
| x|
+---+
| 10|
| 20|
| 30|
| 31|
+---+
Assuming the current row is the one with value 31 for the first window following rows will be included (current one, and two preceding):
+---+----------------------------------------------------+
| x|ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+----------------------------------------------------+
| 10| false|
| 20| true|
| 30| true|
| 31| true|
+---+----------------------------------------------------+
and for the second one following (current one, and all preceding where x >= 31 - 2):
+---+-----------------------------------------------------+
| x|ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+-----------------------------------------------------+
| 10| false|
| 20| false|
| 30| true|
| 31| true|
+---+-----------------------------------------------------+
add a comment |
It is simple:
ROWS BETWEEN
doesn't care about the exact values. It cares only about the order of rows, and takes fixed number of preceding and following rows when computing frame.RANGE BETWEEN
considers values when computing frame.
Let's use an example using two window definitions:
ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW
and data as
+---+
| x|
+---+
| 10|
| 20|
| 30|
| 31|
+---+
Assuming the current row is the one with value 31 for the first window following rows will be included (current one, and two preceding):
+---+----------------------------------------------------+
| x|ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+----------------------------------------------------+
| 10| false|
| 20| true|
| 30| true|
| 31| true|
+---+----------------------------------------------------+
and for the second one following (current one, and all preceding where x >= 31 - 2):
+---+-----------------------------------------------------+
| x|ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+-----------------------------------------------------+
| 10| false|
| 20| false|
| 30| true|
| 31| true|
+---+-----------------------------------------------------+
add a comment |
It is simple:
ROWS BETWEEN
doesn't care about the exact values. It cares only about the order of rows, and takes fixed number of preceding and following rows when computing frame.RANGE BETWEEN
considers values when computing frame.
Let's use an example using two window definitions:
ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW
and data as
+---+
| x|
+---+
| 10|
| 20|
| 30|
| 31|
+---+
Assuming the current row is the one with value 31 for the first window following rows will be included (current one, and two preceding):
+---+----------------------------------------------------+
| x|ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+----------------------------------------------------+
| 10| false|
| 20| true|
| 30| true|
| 31| true|
+---+----------------------------------------------------+
and for the second one following (current one, and all preceding where x >= 31 - 2):
+---+-----------------------------------------------------+
| x|ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+-----------------------------------------------------+
| 10| false|
| 20| false|
| 30| true|
| 31| true|
+---+-----------------------------------------------------+
It is simple:
ROWS BETWEEN
doesn't care about the exact values. It cares only about the order of rows, and takes fixed number of preceding and following rows when computing frame.RANGE BETWEEN
considers values when computing frame.
Let's use an example using two window definitions:
ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW
and data as
+---+
| x|
+---+
| 10|
| 20|
| 30|
| 31|
+---+
Assuming the current row is the one with value 31 for the first window following rows will be included (current one, and two preceding):
+---+----------------------------------------------------+
| x|ORDER BY x ROWS BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+----------------------------------------------------+
| 10| false|
| 20| true|
| 30| true|
| 31| true|
+---+----------------------------------------------------+
and for the second one following (current one, and all preceding where x >= 31 - 2):
+---+-----------------------------------------------------+
| x|ORDER BY x RANGE BETWEEN 2 PRECEDING AND CURRENT ROW|
+---+-----------------------------------------------------+
| 10| false|
| 20| false|
| 30| true|
| 31| true|
+---+-----------------------------------------------------+
edited Nov 14 '18 at 18:22
answered Oct 14 '16 at 18:02
user6910411user6910411
33.9k1079101
33.9k1079101
add a comment |
add a comment |
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