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https://issues.apache.org/jira/browse/HIVE-21292?focusedWorklogId=202545&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-202545
]
ASF GitHub Bot logged work on HIVE-21292:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 22/Feb/19 11:03
Start Date: 22/Feb/19 11:03
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on pull request #543: HIVE-21292:
Break up DDLTask 1 - extract Database related operations
URL: https://github.com/apache/hive/pull/543#discussion_r259298189
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/parse/DDLSemanticAnalyzer.java
##########
@@ -2571,11 +2567,10 @@ private void analyzeDescDatabase(ASTNode ast) throws
SemanticException {
throw new SemanticException("Unexpected Tokens at DESCRIBE DATABASE");
}
- DescDatabaseDesc descDbDesc = new DescDatabaseDesc(ctx.getResFile(),
- dbName, isExtended);
+ DescDatabaseDesc descDbDesc = new DescDatabaseDesc(ctx.getResFile(),
dbName, isExtended);
inputs.add(new ReadEntity(getDatabase(dbName)));
- rootTasks.add(TaskFactory.get(new DDLWork(getInputs(), getOutputs(),
descDbDesc)));
- setFetchTask(createFetchTask(descDbDesc.getSchema()));
+ rootTasks.add(TaskFactory.get(new DDLWork2(getInputs(), getOutputs(),
descDbDesc)));
+ setFetchTask(createFetchTask(DESC_DATABASE_SCHEMA));
Review comment:
I think the `schema` should works similarily to earlier; how about asking
the DDLWork for the schema? it could look up based on the desc
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Issue Time Tracking
-------------------
Worklog Id: (was: 202545)
> Break up DDLTask 1 - extract Database related operations
> --------------------------------------------------------
>
> Key: HIVE-21292
> URL: https://issues.apache.org/jira/browse/HIVE-21292
> Project: Hive
> Issue Type: Improvement
> Components: Hive
> Affects Versions: 3.1.1
> Reporter: Miklos Gergely
> Assignee: Miklos Gergely
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-21292.01.patch, HIVE-21292.02.patch,
> HIVE-21292.03.patch, HIVE-21292.04.patch, HIVE-21292.05.patch
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> DDLTask is a huge class, more than 5000 lines long. The related DDLWork is
> also a huge class, which has a field for each DDL operation it supports. The
> goal is to refactor these in order to have everything cut into more
> handleable classes under the package org.apache.hadoop.hive.ql.exec.ddl:
> * have a separate class for each operation
> * have a package for each operation group (database ddl, table ddl, etc), so
> the amount of classes under a package is more manageable
> * make all the requests (DDLDesc subclasses) immutable
> * DDLTask should be agnostic to the actual operations
> * right now let's ignore the issue of having some operations handled by
> DDLTask which are not actual DDL operations (lock, unlock, desc...)
> In the interim time when there are two DDLTask and DDLWork classes in the
> code base the new ones in the new package are called DDLTask2 and DDLWork2
> thus avoiding the usage of fully qualified class names where both the old and
> the new classes are in use.
> Step #1: extract all the database related operations from the old DDLTask,
> and move them under the new package. Also create the new internal framework.
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