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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2020/11/24 15:33:00 UTC
[jira] [Work logged] (HIVE-19253) HMS ignores tableType property
for external tables
[ https://issues.apache.org/jira/browse/HIVE-19253?focusedWorklogId=516197&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-516197 ]
ASF GitHub Bot logged work on HIVE-19253:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 24/Nov/20 15:32
Start Date: 24/Nov/20 15:32
Worklog Time Spent: 10m
Work Description: szehon-ho commented on pull request #1537:
URL: https://github.com/apache/hive/pull/1537#issuecomment-733051181
Sorry I've been awhile. Thanks Naveen for taking a look. I had some free time today to take a look and the TestHiveMetstoreTransformer but still a bit lost. I tried to set the table type to ManagedTable, but the MetastoreDefaultTransformer actually sets it back to External table by the time the assert happens (actually this should probably do it not via the properties but by the modeled TableType, but in this case it doesn't matter). Code: https://github.com/apache/hive/blob/master/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetastoreDefaultTransformer.java#L596. So then after that , it will due the asserts which fail as they seem to be for ManagedTable, unless I am mistaken. If you have some time to let me know anything else to try, would appreciate it. I haven't taken a look at Miguel's comments yet.
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Issue Time Tracking
-------------------
Worklog Id: (was: 516197)
Time Spent: 1h 20m (was: 1h 10m)
> HMS ignores tableType property for external tables
> --------------------------------------------------
>
> Key: HIVE-19253
> URL: https://issues.apache.org/jira/browse/HIVE-19253
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 3.0.0, 3.1.0, 4.0.0
> Reporter: Alex Kolbasov
> Assignee: Vihang Karajgaonkar
> Priority: Major
> Labels: newbie, pull-request-available
> Attachments: HIVE-19253.01.patch, HIVE-19253.02.patch, HIVE-19253.03.patch, HIVE-19253.03.patch, HIVE-19253.04.patch, HIVE-19253.05.patch, HIVE-19253.06.patch, HIVE-19253.07.patch, HIVE-19253.08.patch, HIVE-19253.09.patch, HIVE-19253.10.patch, HIVE-19253.11.patch, HIVE-19253.12.patch
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> When someone creates a table using Thrift API they may think that setting tableType to {{EXTERNAL_TABLE}} creates an external table. And boom - their table is gone later because HMS will silently change it to managed table.
> here is the offending code:
> {code:java}
> private MTable convertToMTable(Table tbl) throws InvalidObjectException,
> MetaException {
> ...
> // If the table has property EXTERNAL set, update table type
> // accordingly
> String tableType = tbl.getTableType();
> boolean isExternal = Boolean.parseBoolean(tbl.getParameters().get("EXTERNAL"));
> if (TableType.MANAGED_TABLE.toString().equals(tableType)) {
> if (isExternal) {
> tableType = TableType.EXTERNAL_TABLE.toString();
> }
> }
> if (TableType.EXTERNAL_TABLE.toString().equals(tableType)) {
> if (!isExternal) { // Here!
> tableType = TableType.MANAGED_TABLE.toString();
> }
> }
> {code}
> So if the EXTERNAL parameter is not set, table type is changed to managed even if it was external in the first place - which is wrong.
> More over, in other places code looks at the table property to decide table type and some places look at parameter. HMS should really make its mind which one to use.
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