[ https://issues.apache.org/jira/browse/DRILL-7509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17014615#comment-17014615 ]
ASF GitHub Bot commented on DRILL-7509: --------------------------------------- KazydubB commented on pull request #1954: DRILL-7509: Incorrect TupleSchema is created for DICT column when querying Parquet files URL: https://github.com/apache/drill/pull/1954 # [DRILL-7509](https://issues.apache.org/jira/browse/DRILL-7509): Incorrect TupleSchema is created for DICT column when querying Parquet files ## Description Removed nested `MapColumnMetadata` from `DictColumnMetadata`'s `schema` when querying `MAP` type from Parquet files (this nested column comes from the Parquet MAP structure). So the `DictColumnMetadata#schema` contains `key` and `value` fields directly. Added Parquet's `Type.Repetition` to `Metadata_V4` cache file to retain the actual `DataMode` of leaf primitives (previously this mode was computed based on max `repetition` and max `definition` levels, see javadoc @ `ParquetTableMetadataUtils#getDataMode(Type.Repetition)`). ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > Incorrect TupleSchema is created for DICT column when querying Parquet files > ---------------------------------------------------------------------------- > > Key: DRILL-7509 > URL: https://issues.apache.org/jira/browse/DRILL-7509 > Project: Apache Drill > Issue Type: Bug > Affects Versions: 1.16.0 > Reporter: Bohdan Kazydub > Assignee: Bohdan Kazydub > Priority: Major > Fix For: 1.18.0 > > > When {{DICT}} column is queried from Parquet file, its {{TupleSchema}} > contains nested element, e.g. `map`, itself contains `key` and `value` > fields, rather than containing the `key` and `value` fields in the {{DICT}}'s > {{TupleSchema}} itself. The nested element, `map`, comes from the inner > structure of Parquet's {{MAP}} (which corresponds to Drill's {{DICT}}) > representation. -- This message was sent by Atlassian Jira (v8.3.4#803005)