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From "Namit Jain (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-578) Refactor partition pruning code as an optimizer transformation
Date Mon, 10 Aug 2009 21:10:15 GMT

    [ https://issues.apache.org/jira/browse/HIVE-578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741553#action_12741553
] 

Namit Jain commented on HIVE-578:
---------------------------------

atching file ql/src/java/org/apache/hadoop/hive/ql/parse/PartitionPruner.java
(Stripping trailing CRs from patch.)
can't find file to patch at input line 27070
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|Index: ql/src/java/org/apache/hadoop/hive/ql/parse/ASTPartitionPruner.java
|===================================================================
|--- ql/src/java/org/apache/hadoop/hive/ql/parse/ASTPartitionPruner.java	(revision 801363)
|+++ ql/src/java/org/apache/hadoop/hive/ql/parse/ASTPartitionPruner.java	(working copy)
--------------------------
File to patch: 
Skip this patch? [y] 
Skipping patch.
5 out of 5 hunks ignored
(Stripping trailing CRs from patch.)
patching file ql/src/java/org/apache/hadoop/hive/ql/parse/TypeCheckProcFactory.java
(Stripping trailing CRs from patch.)
patching file ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
(Stripping trailing CRs from patch.)
patching file ql/src/java/org/apache/hadoop/hive/ql/parse/ParseContext.java
(Stripping trailing CRs from patch.)
patching file ql/src/java/org/apache/hadoop/hive/ql/parse/PrunedPartitionList.java


Problems in applying the patch - can you generate the patch again ?

> Refactor partition pruning code as an optimizer transformation
> --------------------------------------------------------------
>
>                 Key: HIVE-578
>                 URL: https://issues.apache.org/jira/browse/HIVE-578
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>    Affects Versions: 0.3.0
>            Reporter: Ashish Thusoo
>            Assignee: Ashish Thusoo
>         Attachments: patch-578.txt, patch-578_1.txt, patch-578_2.txt, patch-578_3.txt
>
>
> Some bugs with partition pruning have been reported and the correct fix for many of them
is to rewrite the partition pruning code as an optimizer transformation which gets kicked
in after the predicate pushdown code. This refactor also uses the graph walker framework so
that the partition pruning code gets consolidated well with the frameworks and does not work
on the query block but rather works on the operator tree.

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