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https://issues.apache.org/jira/browse/DRILL-7330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17059469#comment-17059469
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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_r392613050
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/FilePushDownFilter.java
##########
@@ -244,4 +247,15 @@ protected void doOnMatch(RelOptRuleCall call, FilterPrel
filter, ProjectPrel pro
final RelNode newFilter = filter.copy(filter.getTraitSet(),
Collections.singletonList(newNode));
call.transformTo(newFilter);
}
+
+ /**
+ * Checks whether specified group scan supports filter push down.
+ *
+ * @param groupScan group scan to check
+ * @return {@code true} if specified group scan supports filter push down,
{@code false} otherwise
+ */
+ private static boolean supportsFilterPushDown(GroupScan groupScan) {
+ return groupScan instanceof AbstractGroupScanWithMetadata
Review comment:
This kind of logic is fragile. Can we just add a method on the group scan
that will answer this question, then let each group scan figure out the answer
or itself?
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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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