[ 
https://issues.apache.org/jira/browse/HIVE-22079?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16928462#comment-16928462
 ] 

Hive QA commented on HIVE-22079:
--------------------------------



Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12980137/HIVE-22079.4.patch

{color:red}ERROR:{color} -1 due to build exiting with an error

Test results: 
https://builds.apache.org/job/PreCommit-HIVE-Build/18559/testReport
Console output: https://builds.apache.org/job/PreCommit-HIVE-Build/18559/console
Test logs: http://104.198.109.242/logs/PreCommit-HIVE-Build-18559/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.TestCheckPhase
Executing org.apache.hive.ptest.execution.PrepPhase
Tests exited with: NonZeroExitCodeException
Command 'bash /data/hiveptest/working/scratch/source-prep.sh' failed with exit 
status 1 and output '+ date '+%Y-%m-%d %T.%3N'
2019-09-12 11:29:22.028
+ [[ -n /usr/lib/jvm/java-8-openjdk-amd64 ]]
+ export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
+ JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
+ export 
PATH=/usr/lib/jvm/java-8-openjdk-amd64/bin/:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
+ 
PATH=/usr/lib/jvm/java-8-openjdk-amd64/bin/:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games
+ export 'ANT_OPTS=-Xmx1g -XX:MaxPermSize=256m '
+ ANT_OPTS='-Xmx1g -XX:MaxPermSize=256m '
+ export 'MAVEN_OPTS=-Xmx1g '
+ MAVEN_OPTS='-Xmx1g '
+ cd /data/hiveptest/working/
+ tee /data/hiveptest/logs/PreCommit-HIVE-Build-18559/source-prep.txt
+ [[ false == \t\r\u\e ]]
+ mkdir -p maven ivy
+ [[ git = \s\v\n ]]
+ [[ git = \g\i\t ]]
+ [[ -z master ]]
+ [[ -d apache-github-source-source ]]
+ [[ ! -d apache-github-source-source/.git ]]
+ [[ ! -d apache-github-source-source ]]
+ date '+%Y-%m-%d %T.%3N'
2019-09-12 11:29:22.031
+ cd apache-github-source-source
+ git fetch origin
+ git reset --hard HEAD
HEAD is now at 101d4d6 HIVE-22126: hive-exec packaging should shade guava 
(Laszlo Pinter reviewed by Adam Szita, Peter Vary)
+ git clean -f -d
Removing standalone-metastore/metastore-server/src/gen/
+ git checkout master
Already on 'master'
Your branch is up-to-date with 'origin/master'.
+ git reset --hard origin/master
HEAD is now at 101d4d6 HIVE-22126: hive-exec packaging should shade guava 
(Laszlo Pinter reviewed by Adam Szita, Peter Vary)
+ git merge --ff-only origin/master
Already up-to-date.
+ date '+%Y-%m-%d %T.%3N'
2019-09-12 11:29:23.101
+ rm -rf ../yetus_PreCommit-HIVE-Build-18559
+ mkdir ../yetus_PreCommit-HIVE-Build-18559
+ git gc
+ cp -R . ../yetus_PreCommit-HIVE-Build-18559
+ mkdir /data/hiveptest/logs/PreCommit-HIVE-Build-18559/yetus
+ patchCommandPath=/data/hiveptest/working/scratch/smart-apply-patch.sh
+ patchFilePath=/data/hiveptest/working/scratch/build.patch
+ [[ -f /data/hiveptest/working/scratch/build.patch ]]
+ chmod +x /data/hiveptest/working/scratch/smart-apply-patch.sh
+ /data/hiveptest/working/scratch/smart-apply-patch.sh 
/data/hiveptest/working/scratch/build.patch
error: a/ql/src/java/org/apache/hadoop/hive/ql/lib/DefaultGraphWalker.java: 
does not exist in index
error: a/ql/src/java/org/apache/hadoop/hive/ql/lib/ExpressionWalker.java: does 
not exist in index
error: a/ql/src/java/org/apache/hadoop/hive/ql/ppd/ExprWalkerProcFactory.java: 
does not exist in index
error: a/ql/src/test/results/clientpositive/llap/explainuser_1.q.out: does not 
exist in index
Going to apply patch with: git apply -p1
+ [[ maven == \m\a\v\e\n ]]
+ rm -rf /data/hiveptest/working/maven/org/apache/hive
+ mvn -B clean install -DskipTests -T 4 -q 
-Dmaven.repo.local=/data/hiveptest/working/maven
protoc-jar: executing: [/tmp/protoc6894725184725796936.exe, --version]
libprotoc 2.5.0
protoc-jar: executing: [/tmp/protoc6894725184725796936.exe, 
-I/data/hiveptest/working/apache-github-source-source/standalone-metastore/metastore-common/src/main/protobuf/org/apache/hadoop/hive/metastore,
 
--java_out=/data/hiveptest/working/apache-github-source-source/standalone-metastore/metastore-common/target/generated-sources,
 
/data/hiveptest/working/apache-github-source-source/standalone-metastore/metastore-common/src/main/protobuf/org/apache/hadoop/hive/metastore/metastore.proto]
ANTLR Parser Generator  Version 3.5.2
protoc-jar: executing: [/tmp/protoc1146062031832990439.exe, --version]
libprotoc 2.5.0
ANTLR Parser Generator  Version 3.5.2
Output file 
/data/hiveptest/working/apache-github-source-source/standalone-metastore/metastore-server/target/generated-sources/org/apache/hadoop/hive/metastore/parser/FilterParser.java
 does not exist: must build 
/data/hiveptest/working/apache-github-source-source/standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/parser/Filter.g
org/apache/hadoop/hive/metastore/parser/Filter.g
log4j:WARN No appenders could be found for logger (DataNucleus.Persistence).
log4j:WARN Please initialize the log4j system properly.
DataNucleus Enhancer (version 4.1.17) for API "JDO"
DataNucleus Enhancer completed with success for 41 classes.
ANTLR Parser Generator  Version 3.5.2
Output file 
/data/hiveptest/working/apache-github-source-source/ql/target/generated-sources/antlr3/org/apache/hadoop/hive/ql/parse/HiveLexer.java
 does not exist: must build 
/data/hiveptest/working/apache-github-source-source/ql/src/java/org/apache/hadoop/hive/ql/parse/HiveLexer.g
org/apache/hadoop/hive/ql/parse/HiveLexer.g
Output file 
/data/hiveptest/working/apache-github-source-source/ql/target/generated-sources/antlr3/org/apache/hadoop/hive/ql/parse/HiveParser.java
 does not exist: must build 
/data/hiveptest/working/apache-github-source-source/ql/src/java/org/apache/hadoop/hive/ql/parse/HiveParser.g
org/apache/hadoop/hive/ql/parse/HiveParser.g
Output file 
/data/hiveptest/working/apache-github-source-source/ql/target/generated-sources/antlr3/org/apache/hadoop/hive/ql/parse/HintParser.java
 does not exist: must build 
/data/hiveptest/working/apache-github-source-source/ql/src/java/org/apache/hadoop/hive/ql/parse/HintParser.g
org/apache/hadoop/hive/ql/parse/HintParser.g
Generating vector expression code
Generating vector expression test code
Processing annotations
Annotations processed
Processing annotations
No elements to process
[ERROR] COMPILATION ERROR : 
[ERROR] 
/data/hiveptest/working/apache-github-source-source/ql/src/java/org/apache/hadoop/hive/ql/ppd/ExprWalkerProcFactory.java:[341,27]
 cannot find symbol
  symbol:   class PostOrderWalker
  location: class org.apache.hadoop.hive.ql.ppd.ExprWalkerProcFactory
[ERROR] Failed to execute goal 
org.apache.maven.plugins:maven-compiler-plugin:3.6.1:compile (default-compile) 
on project hive-exec: Compilation failure
[ERROR] 
/data/hiveptest/working/apache-github-source-source/ql/src/java/org/apache/hadoop/hive/ql/ppd/ExprWalkerProcFactory.java:[341,27]
 cannot find symbol
[ERROR] symbol:   class PostOrderWalker
[ERROR] location: class org.apache.hadoop.hive.ql.ppd.ExprWalkerProcFactory
[ERROR] -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e 
switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please 
read the following articles:
[ERROR] [Help 1] 
http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR] 
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :hive-exec
+ result=1
+ '[' 1 -ne 0 ']'
+ rm -rf yetus_PreCommit-HIVE-Build-18559
+ exit 1
'
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12980137 - PreCommit-HIVE-Build

> Post order walker for iterating over expression tree
> ----------------------------------------------------
>
>                 Key: HIVE-22079
>                 URL: https://issues.apache.org/jira/browse/HIVE-22079
>             Project: Hive
>          Issue Type: Improvement
>          Components: Logical Optimizer, Physical Optimizer
>    Affects Versions: 4.0.0
>            Reporter: Vineet Garg
>            Assignee: Vineet Garg
>            Priority: Major
>         Attachments: HIVE-22079.1.patch, HIVE-22079.2.patch, 
> HIVE-22079.3.patch, HIVE-22079.4.patch
>
>
> Current {{DefaultGraphWalker}} is used to iterate over an expression tree. 
> This walker uses hash map to keep track of visited/processed nodes. If an 
> expression tree is large this adds significant overhead due to map lookup.
> For an expression trees we can instead use post order traversal and avoid 
> using map.



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