Mateusz User created SPARK-30781:
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Summary: Missing SortedMap type in pyspark
Key: SPARK-30781
URL: https://issues.apache.org/jira/browse/SPARK-30781
Project: Spark
Issue Type: Improvement
Components: PySpark
Affects Versions: 2.4.5
Reporter: Mateusz User
Currently there is only MapType in pyspark API, which does not keep order of
key-value map.
*SortedMapType* would fill this gap: a map with sorted key-value pairs (like
TreeMap in Java).
For example:
*SortedMapType* would be very useful when user wants to persist row from
DataFrame into Mongo-db.
row which consist a column with values of an ordered map type:
col : [1 -> 22, 2 -> 16, 3 -> 25]
will be persisted as following json:
{
"1": 22,
"2": 16,
"3": 25
}
instead of MapType which results in currently:
{
"2": 16,
"1": 22,
"3": 25
}
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