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https://issues.apache.org/jira/browse/DRILL-7330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17059453#comment-17059453
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ASF GitHub Bot commented on DRILL-7330:
---------------------------------------
paul-rogers commented on pull request #2026: DRILL-7330: Implement metadata
usage for all format plugins
URL: https://github.com/apache/drill/pull/2026#discussion_r392607531
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/base/AbstractGroupScanWithMetadata.java
##########
@@ -634,6 +642,62 @@ public NonInterestingColumnsMetadata
getNonInterestingColumnsMetadata() {
return nonInterestingColumnsMetadata;
}
+ /**
+ * Returns {@link TableMetadataProviderBuilder} instance based on specified
+ * {@link MetadataProviderManager} source.
+ *
+ * @param source metadata provider manager
+ * @return {@link TableMetadataProviderBuilder} instance
+ */
+ protected abstract TableMetadataProviderBuilder
tableMetadataProviderBuilder(MetadataProviderManager source);
+
+ /**
+ * Returns {@link TableMetadataProviderBuilder} instance which may provide
metadata
+ * without using Drill Metastore.
+ *
+ * @param source metadata provider manager
+ * @return {@link TableMetadataProviderBuilder} instance
+ */
+ protected abstract TableMetadataProviderBuilder
defaultTableMetadataProviderBuilder(MetadataProviderManager source);
+
+ /**
+ * Compares the last modified time of files obtained from specified
selection with
+ * the Metastore last modified time to determine whether Metastore metadata
+ * is not outdated. If metadata is outdated, {@link MetadataException} will
be thrown.
Review comment:
"is not outdated" --> "is current" or "is outdated"
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> Implement metadata usage for text format plugin
> -----------------------------------------------
>
> Key: DRILL-7330
> URL: https://issues.apache.org/jira/browse/DRILL-7330
> Project: Apache Drill
> Issue Type: Sub-task
> Reporter: Arina Ielchiieva
> Assignee: Vova Vysotskyi
> Priority: Major
> Fix For: 1.18.0
>
>
> 1. Change the current group scan to leverage Schema from Metastore;
> 2. Use stats for enabling additional logical planning rules for text format
> plugin. It will enable such optimizations as limit, filter push and so on.
> + add possibility to pass schema through schema file (using path or table
> root), inline.
> + check for other enhancements in analyze command
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