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https://issues.apache.org/jira/browse/HIVE-25553?focusedWorklogId=658338&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-658338
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ASF GitHub Bot logged work on HIVE-25553:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 30/Sep/21 13:24
Start Date: 30/Sep/21 13:24
Worklog Time Spent: 10m
Work Description: warriersruthi opened a new pull request #2689:
URL: https://github.com/apache/hive/pull/2689
This covers the following sub-tasks as well:
HIVE-25554: Upgrade arrow version to 0.15
HIVE-25555: ArrowColumnarBatchSerDe should store map natively instead of
converting to list
HIVE-25556: Remove com.vlkan.flatbuffers dependency from serde
**What changes were proposed in this pull request?**
a. Upgrading arrow version to version 0.15.0 (where map data-type is
supported)
b. Modifying ArrowColumnarBatchSerDe and corresponding
Serializer/Deserializer to not use list as a workaround for map and use the
arrow map data-type instead
c. Taking care of creating non-nullable struct and non-nullable key type for
the map data-type in ArrowColumnarBatchSerDe
**Why are the changes needed?**
Currently, ArrowColumnarBatchSerDe converts map datatype as a list of
structs data-type (where the struct is containing the key-value pair of the
map).
This causes issues when reading Map datatype using llap-ext-client as it
reads a list of structs instead.
HiveWarehouseConnector which uses the llap-ext-client throws exception when
the schema (containing Map data type) is different from actual data (list of
structs).
This change includes the fix for this issue.
**Does this PR introduce any user-facing change?**
No
**How was this patch tested?**
Enabled back the Arrow specific tests in Hive code
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Issue Time Tracking
-------------------
Worklog Id: (was: 658338)
Remaining Estimate: 0h
Time Spent: 10m
> Support Map data-type natively in Arrow format
> ----------------------------------------------
>
> Key: HIVE-25553
> URL: https://issues.apache.org/jira/browse/HIVE-25553
> Project: Hive
> Issue Type: Improvement
> Components: llap, Serializers/Deserializers
> Reporter: Adesh Kumar Rao
> Assignee: Adesh Kumar Rao
> Priority: Major
> Fix For: 4.0.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Currently ArrowColumnarBatchSerDe converts map datatype as a list of structs
> data-type (where stuct is containing the key-value pair of the map). This
> causes issues when reading Map datatype using llap-ext-client as it reads a
> list of structs instead.
> HiveWarehouseConnector which uses the llap-ext-client throws exception when
> the schema (containing Map data type) is different from actual data (list of
> structs).
>
> Fixing this issue requires upgrading arrow version (where map data-type is
> supported), modifying ArrowColumnarBatchSerDe and corresponding
> Serializer/Deserializer to not use list as a workaround for map and use the
> arrow map data-type instead.
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