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Posted to issues-all@impala.apache.org by "ASF subversion and git services (Jira)" <ji...@apache.org> on 2022/09/10 05:08:00 UTC
[jira] [Commented] (IMPALA-9499) Display support for all complex types in a SELECT * query
[ https://issues.apache.org/jira/browse/IMPALA-9499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17602618#comment-17602618 ]
ASF subversion and git services commented on IMPALA-9499:
---------------------------------------------------------
Commit 04b5319e6e8417226c28f4fe8386e86ce488a4c2 in impala's branch refs/heads/master from Peter Rozsa
[ https://gitbox.apache.org/repos/asf?p=impala.git;h=04b5319e6 ]
IMPALA-9499: Display support for all complex types in a SELECT * query
This change adds EXPAND_COMPLEX_TYPES query option to support the
display of complex types in SELECT statements where star (*) expression
is in the select list. By default, the query option is disabled. When
it's enabled, it changes the behaviour of star expansion to list all
top-level column fields including ones with complex types, instead of
listing the scalar column fields only. Nested complex type expansion is
also supported, eg.: struct.* will enumerate the members of the struct.
Array, map and struct types are supported.
Testing:
- Analyzer tests check select statements when the query option is
enabled or disabled.
- EE tests check the proper complex type deserialization when the query
option is enabled, and the original behaviour when the option is
disabled.
Change-Id: I84b5e5703f9e0ce0f4f8bff83941677dd7489974
Reviewed-on: http://gerrit.cloudera.org:8080/18863
Reviewed-by: Impala Public Jenkins <im...@cloudera.com>
Tested-by: Impala Public Jenkins <im...@cloudera.com>
> Display support for all complex types in a SELECT * query
> ---------------------------------------------------------
>
> Key: IMPALA-9499
> URL: https://issues.apache.org/jira/browse/IMPALA-9499
> Project: IMPALA
> Issue Type: New Feature
> Components: Backend
> Reporter: Gabor Kaszab
> Assignee: Peter Rozsa
> Priority: Major
> Labels: complextype, ramp-up
>
> Covers all complex types (Struct, Array, Map) for both Parquet and ORC file formats.
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