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From "Jason Altekruse" <altekruseja...@gmail.com>
Subject Re: Review Request 30697: Drill-2060 - part 2 - constant expression folding during planning
Date Tue, 24 Mar 2015 16:53:28 GMT

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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/30697/
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(Updated March 24, 2015, 4:53 p.m.)


Review request for drill, Aditya Kishore, Aman Sinha, Jacques Nadeau, Jinfeng Ni, Mehant Baid,
and Parth Chandra.


Changes
-------

Fix failing testcase with small change to the cost calcuation of an EasyGroupScan in the case
of very small files. Also fixed matierializing null outputs from folded constant expressions.


Bugs: DRILL-2060
    https://issues.apache.org/jira/browse/DRILL-2060


Repository: drill-git


Description
-------

THIS REQUEST HAS BEEN BROKEN INTO TWO REVIEWS:
- I had to make a fairly substandial change to the interpreteed expression evaluation to make
the tests work.

Use a small modification of a rule in optiq and hook up the interpreted expression evaluator
to fold constant expressions (including those with Drill UDFs) into literals. Fragment memory
limits have been disabled, a more complete refactoring of memory management is planned, the
changes made here were to allow the creation of a childAllocator without access to a fragment
context. I have added two comments next to the modifiations I made to the optiq rule for our
use case.


Diffs (updated)
-----

  contrib/storage-hive/core/src/main/java/org/apache/drill/exec/planner/sql/HiveUDFOperator.java
7524690 
  exec/java-exec/src/main/java/io/netty/buffer/DrillBuf.java d87fb76 
  exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/DrillFunctionRegistry.java 32cf362

  exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/impl/StringFunctionHelpers.java
3b1d7ef 
  exec/java-exec/src/main/java/org/apache/drill/exec/expr/fn/interpreter/InterpreterEvaluator.java
35c35ec 
  exec/java-exec/src/main/java/org/apache/drill/exec/ops/BufferManager.java 536f6fd 
  exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillConstExecutor.java
PRE-CREATION 
  exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillReduceExpressionsRule.java
PRE-CREATION 
  exec/java-exec/src/main/java/org/apache/drill/exec/planner/logical/DrillRuleSets.java b1a7189

  exec/java-exec/src/main/java/org/apache/drill/exec/planner/physical/PlannerSettings.java
f320157 
  exec/java-exec/src/main/java/org/apache/drill/exec/planner/sql/DrillSqlWorker.java 710418b

  exec/java-exec/src/main/java/org/apache/drill/exec/server/options/SystemOptionManager.java
608fac7 
  exec/java-exec/src/main/java/org/apache/drill/exec/store/dfs/easy/EasyGroupScan.java 54cad56

  exec/java-exec/src/test/java/org/apache/drill/PlanningBase.java e673230 
  exec/java-exec/src/test/java/org/apache/drill/TestProjectPushDown.java cbb5c6e 
  exec/java-exec/src/test/java/org/apache/drill/exec/fn/impl/TestAggregateFunctions.java 72ad31a

  exec/java-exec/src/test/java/org/apache/drill/exec/fn/interp/TestConstantFolding.java PRE-CREATION

  exec/java-exec/src/test/resources/parquet/alltypes.json PRE-CREATION 
  pom.xml 05573a1 

Diff: https://reviews.apache.org/r/30697/diff/


Testing
-------

This is a work in progress, some testing has been done, no full unit test run yet


Thanks,

Jason Altekruse


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