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https://issues.apache.org/jira/browse/TAJO-1735?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14653231#comment-14653231
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ASF GitHub Bot commented on TAJO-1735:
--------------------------------------
Github user blrunner commented on a diff in the pull request:
https://github.com/apache/tajo/pull/673#discussion_r36164997
--- Diff:
tajo-catalog/tajo-catalog-common/src/main/java/org/apache/tajo/catalog/CatalogService.java
---
@@ -24,6 +24,7 @@
import org.apache.tajo.catalog.proto.CatalogProtos.*;
import org.apache.tajo.common.TajoDataTypes.DataType;
+import javax.annotation.Nullable;
--- End diff --
It looks like unused package.
> Implement MetadataProvider and LinkedMetadataManager
> ----------------------------------------------------
>
> Key: TAJO-1735
> URL: https://issues.apache.org/jira/browse/TAJO-1735
> Project: Tajo
> Issue Type: Sub-task
> Components: Catalog
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Fix For: 0.11.0
>
>
> This patch add a MetadataProvider interface and LinkedMetadataManager;
> * MetadataProvider provides a way to access linked meta data store through
> an unified API.
> * LinkedMetadataManager manages all MetadataProvider instances.
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