vvysotskyi commented on a change in pull request #2026: DRILL-7330: Implement
metadata usage for all format plugins
URL: https://github.com/apache/drill/pull/2026#discussion_r392706872
##########
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:
Caching here is done in the scope of the query - since it may be excessive
to store metadata between queries submitting, sine even if several queries use
the same tables, there is no guarantee that the same drillbit will be foreman
for all these queries. Also, there may be a problem with cache actuality.
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