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Posted to issues@hive.apache.org by "László Pintér (Jira)" <ji...@apache.org> on 2022/06/16 06:13:00 UTC
[jira] [Resolved] (HIVE-26298) Selecting complex types on migrated iceberg table does not work
[ https://issues.apache.org/jira/browse/HIVE-26298?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
László Pintér resolved HIVE-26298.
----------------------------------
Resolution: Fixed
> Selecting complex types on migrated iceberg table does not work
> ---------------------------------------------------------------
>
> Key: HIVE-26298
> URL: https://issues.apache.org/jira/browse/HIVE-26298
> Project: Hive
> Issue Type: Bug
> Reporter: Gergely Fürnstáhl
> Assignee: László Pintér
> Priority: Major
> Labels: pull-request-available
> Attachments: 00001-a5d522f4-a065-44e6-983b-ba66596b4332.metadata.json
>
> Time Spent: 1h
> Remaining Estimate: 0h
>
> I am working on implementing NameMapping in Impala (mainly replicating Hive's functionality) and ran into the following issue:
> {code:java}
> CREATE TABLE array_demo
> (
> int_primitive INT,
> int_array ARRAY<INT>,
> int_array_array ARRAY<ARRAY<INT>>,
> int_to_array_array_Map MAP<INT,ARRAY<ARRAY<INT>>>
> )
> STORED AS ORC;
> INSERT INTO array_demo values (0, array(1), array(array(2), array(3,4)), map(5,array(array(6),array(7,8))));
> select * from array_demo;
> +---------------------------+-----------------------+-----------------------------+------------------------------------+
> | array_demo.int_primitive | array_demo.int_array | array_demo.int_array_array | array_demo.int_to_array_array_map |
> +---------------------------+-----------------------+-----------------------------+------------------------------------+
> | 0 | [1] | [[2],[3,4]] | {5:[[6],[7,8]]} |
> +---------------------------+-----------------------+-----------------------------+------------------------------------+
> {code}
> Converting to iceberg
>
>
> {code:java}
> ALTER TABLE array_demo SET TBLPROPERTIES ('storage_handler'='org.apache.iceberg.mr.hive.HiveIcebergStorageHandler')
> select * from array_demo;
> INFO : Compiling command(queryId=gfurnstahl_20220608102746_54bf3e74-e12b-400b-94a9-4e4c9fe460fe): select * from array_demo
> INFO : No Stats for default@array_demo, Columns: int_primitive, int_array, int_to_array_array_map, int_array_array
> INFO : Semantic Analysis Completed (retrial = false)
> INFO : Created Hive schema: Schema(fieldSchemas:[FieldSchema(name:array_demo.int_primitive, type:int, comment:null), FieldSchema(name:array_demo.int_array, type:array<int>, comment:null), FieldSchema(name:array_demo.int_array_array, type:array<array<int>>, comment:null), FieldSchema(name:array_demo.int_to_array_array_map, type:map<int,array<array<int>>>, comment:null)], properties:null)
> INFO : Completed compiling command(queryId=gfurnstahl_20220608102746_54bf3e74-e12b-400b-94a9-4e4c9fe460fe); Time taken: 0.036 seconds
> INFO : Executing command(queryId=gfurnstahl_20220608102746_54bf3e74-e12b-400b-94a9-4e4c9fe460fe): select * from array_demo
> INFO : Completed executing command(queryId=gfurnstahl_20220608102746_54bf3e74-e12b-400b-94a9-4e4c9fe460fe); Time taken: 0.0 seconds
> INFO : OK
> Error: java.io.IOException: java.lang.IllegalArgumentException: Can not promote MAP type to INTEGER (state=,code=0)
> select int_primitive from array_demo;
> +----------------+
> | int_primitive |
> +----------------+
> | 0 |
> +----------------+
> 1 row selected (0.088 seconds)
> {code}
> Removing schema.name-mapping.default solves it
> {code:java}
> ALTER TABLE array_demo UNSET TBLPROPERTIES ('schema.name-mapping.default');
> select * from array_demo;
> +---------------------------+-----------------------+-----------------------------+------------------------------------+
> | array_demo.int_primitive | array_demo.int_array | array_demo.int_array_array | array_demo.int_to_array_array_map |
> +---------------------------+-----------------------+-----------------------------+------------------------------------+
> | 0 | [1] | [[2],[3,4]] | {5:[[6],[7,8]]} |
> +---------------------------+-----------------------+-----------------------------+------------------------------------+
> {code}
> Possible cause:
>
> The name mapping generated and pushed into schema.name-mapping.default is different from the name mapping in the schema in the metadata.json (attached it)
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