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Posted to dev@arrow.apache.org by "Ji Liu (JIRA)" <ji...@apache.org> on 2019/07/31 03:34:00 UTC

[jira] [Created] (ARROW-6078) [Java] Implement dictionary-encoded subfields for List type

Ji Liu created ARROW-6078:
-----------------------------

             Summary: [Java] Implement dictionary-encoded subfields for List type
                 Key: ARROW-6078
                 URL: https://issues.apache.org/jira/browse/ARROW-6078
             Project: Apache Arrow
          Issue Type: Sub-task
            Reporter: Ji Liu
            Assignee: Ji Liu


For example, int type List (valueCount = 5) has data like below:

10, 20

10, 20

30, 40, 50

30, 40, 50

10, 20

could be encoded to:

0, 1

0, 1

2, 3, 4

2, 3, 4

0, 1

with list type dictionary

10, 20, 30, 40, 50

or

10,

20,

30,

40,

50

 



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