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https://issues.apache.org/jira/browse/DRILL-7330?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17059475#comment-17059475
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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_r392610951
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/store/dfs/easy/EasyGroupScan.java
##########
@@ -90,17 +95,14 @@ public EasyGroupScan(
@JsonProperty("selectionRoot") Path selectionRoot,
@JsonProperty("schema") TupleMetadata schema
) throws IOException {
- super(ImpersonationUtil.resolveUserName(userName));
+ super(ImpersonationUtil.resolveUserName(userName), columns,
ValueExpressions.BooleanExpression.TRUE);
this.selection = FileSelection.create(null, files, selectionRoot);
this.formatPlugin = engineRegistry.resolveFormat(storageConfig,
formatConfig, EasyFormatPlugin.class);
this.columns = columns == null ? ALL_COLUMNS : columns;
this.selectionRoot = selectionRoot;
- SimpleFileTableMetadataProviderBuilder builder =
- (SimpleFileTableMetadataProviderBuilder)
- new FileSystemMetadataProviderManager()
-
.builder(MetadataProviderManager.MetadataProviderKind.SCHEMA_STATS_ONLY);
- this.metadataProvider = builder.withLocation(selection.getSelectionRoot())
+ this.metadataProvider = defaultTableMetadataProviderBuilder(new
FileSystemMetadataProviderManager())
Review comment:
Will this load data from the metastore on each query? Or, is there some
caching going on behind the scenes? If caching, is the cache global or tied to,
say, the `DrillbitContext`?
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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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