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https://issues.apache.org/jira/browse/DRILL-7271?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arina Ielchiieva updated DRILL-7271:
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Fix Version/s: 1.17.0
> Refactor Metadata interfaces and classes to contain all needed information
> for the File based Metastore
> -------------------------------------------------------------------------------------------------------
>
> Key: DRILL-7271
> URL: https://issues.apache.org/jira/browse/DRILL-7271
> Project: Apache Drill
> Issue Type: Sub-task
> Reporter: Arina Ielchiieva
> Assignee: Volodymyr Vysotskyi
> Priority: Major
> Fix For: 1.17.0
>
>
> 1. Merge info from metadataStatistics + statisticsKinds into one holder:
> Map<String, StatisticsHolder>.
> 2. Rename hasStatistics to hasDescriptiveStatistics
> 3. Remove drill-file-metastore-plugin
> 4. Move
> org.apache.drill.exec.physical.base.AbstractGroupScanWithMetadata.MetadataLevel
> to metadata module, rename to MetadataType and add new value: DIRECTORY.
> 5. Add JSON ser/de for ColumnStatistics, StatisticsHolder.
> 6. Add new info classes:
> {noformat}
> class TableInfo {
> String storagePlugin;
> String workspace;
> String name;
> String type;
> String owner;
> }
> class MetadataInfo {
> public static final String GENERAL_INFO_KEY = "GENERAL_INFO";
> public static final String DEFAULT_PARTITION_KEY = "DEFAULT_PARTITION";
> MetadataType type (enum);
> String key;
> String identifier;
> }
> {noformat}
> 7. Modify existing metadata classes:
> org.apache.drill.metastore.FileTableMetadata
> {noformat}
> missing fields
> ------------------
> storagePlugin, workspace, tableType -> will be covered by TableInfo class
> metadataType, metadataKey -> will be covered by MetadataInfo class
> interestingColumns
> fields to modify
> ----------------
> private final Map<String, Object> tableStatistics;
> private final Map<String, StatisticsKind> statisticsKinds;
> private final Set<String> partitionKeys; -> Map<String, String>
> {noformat}
> org.apache.drill.metastore.PartitionMetadata
> {noformat}
> missing fields
> ------------------
> storagePlugin, workspace -> will be covered by TableInfo class
> metadataType, metadataKey, metadataIdentifier -> will be covered by
> MetadataInfo class
> partitionValues (List<String>)
> location (String) (for directory level metadata) - directory location
> fields to modify
> ----------------
> private final Map<String, Object> tableStatistics;
> private final Map<String, StatisticsKind> statisticsKinds;
> private final Set<Path> location; -> locations
> {noformat}
> org.apache.drill.metastore.FileMetadata
> {noformat}
> missing fields
> ------------------
> storagePlugin, workspace -> will be covered by TableInfo class
> metadataType, metadataKey, metadataIdentifier -> will be covered by
> MetadataInfo class
> path - path to file
> fields to modify
> ----------------
> private final Map<String, Object> tableStatistics;
> private final Map<String, StatisticsKind> statisticsKinds;
> private final Path location; - should contain directory to which file belongs
> {noformat}
> org.apache.drill.metastore.RowGroupMetadata
> {noformat}
> missing fields
> ------------------
> storagePlugin, workspace -> will be covered by TableInfo class
> metadataType, metadataKey, metadataIdentifier -> will be covered by
> MetadataInfo class
> fields to modify
> ----------------
> private final Map<String, Object> tableStatistics;
> private final Map<String, StatisticsKind> statisticsKinds;
> {noformat}
> 8. Remove org.apache.drill.exec package from metastore module.
> 9. Rename ColumnStatisticsImpl class.
> 10. Separate existing classes in org.apache.drill.metastore package into
> sub-packages.
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