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https://issues.apache.org/jira/browse/HIVE-24397?focusedWorklogId=518756&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-518756
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ASF GitHub Bot logged work on HIVE-24397:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 02/Dec/20 04:02
Start Date: 02/Dec/20 04:02
Worklog Time Spent: 10m
Work Description: nrg4878 commented on a change in pull request #1681:
URL: https://github.com/apache/hive/pull/1681#discussion_r533881997
##########
File path:
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/IMetaStoreClient.java
##########
@@ -733,6 +733,27 @@ Table getTable(String catName, String dbName, String
tableName,
List<Table> getTableObjectsByName(String dbName, List<String> tableNames)
throws MetaException, InvalidOperationException, UnknownDBException,
TException;
+
+ /**
+ * Get tables as objects (rather than just fetching their names). This is
more expensive and
+ * should only be used if you actually need all the information about the
tables.
+ * @param request GetTablesRequest Object.
+ * @return A list of objects representing the tables.
+ * Only the tables that can be retrieved from the database are
returned. For example,
+ * if none of the requested tables could be retrieved, an empty
list is returned.
+ * There is no guarantee of ordering of the returned tables.
+ * @throws InvalidOperationException
+ * The input to this operation is invalid (e.g., the list of tables
names is null)
+ * @throws UnknownDBException
+ * The requested database could not be fetched.
+ * @throws TException
+ * A thrift communication error occurred
+ * @throws MetaException
+ * Any other errors
+ */
+ GetTablesResult getTables(GetTablesRequest request)
Review comment:
This method should have a different signature. So the Request/Result
objects are serialized/deserialized between the client and the server. The
client side application code (for example HiveServer2) should not have to deal
with Request/Response objects.
So HS2 will invoke something like this
IMetastoreClient.getTableObjectsByName(String catName, String dbName,
List<String> tableNames)
or
IMetastoreClient.getTableObjectsByName(String catName, String dbName,
List<String> tableNames, GetProjectionSpec projectionSpec)
These 2 methods internally have to build a GetTablesRequest object based on
the arguments, make the thrift call which returns the GetTablesResults object,
which then have to be returned to calls as List<Table>
So the signature should be something like this
List<Table> getTables/getTableObjectsByName(catName, dbName, tableNames,
projectionSpec)
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Issue Time Tracking
-------------------
Worklog Id: (was: 518756)
Time Spent: 50m (was: 40m)
> Add the projection specification to the table request object and add
> placeholders in ObjectStore.java
> -----------------------------------------------------------------------------------------------------
>
> Key: HIVE-24397
> URL: https://issues.apache.org/jira/browse/HIVE-24397
> Project: Hive
> Issue Type: Sub-task
> Components: Hive
> Reporter: Narayanan Venkateswaran
> Assignee: Narayanan Venkateswaran
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
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