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https://issues.apache.org/jira/browse/HIVE-4880?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13718049#comment-13718049
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Navis commented on HIVE-4880:
-----------------------------
Current (from auto_sortmerge_join9.q)
{noformat}
Stage-12 is a root stage , consists of Stage-18, Stage-19, Stage-1
Stage-18 has a backup stage: Stage-1
Stage-10 depends on stages: Stage-18
Stage-9 depends on stages: Stage-1, Stage-5, Stage-10, Stage-11, Stage-13,
Stage-14 , consists of Stage-16, Stage-17, Stage-3
Stage-16 has a backup stage: Stage-3
Stage-7 depends on stages: Stage-16
Stage-4 depends on stages: Stage-3, Stage-7, Stage-8
Stage-17 has a backup stage: Stage-3
Stage-8 depends on stages: Stage-17
Stage-3
Stage-19 has a backup stage: Stage-1
Stage-11 depends on stages: Stage-19
Stage-1
Stage-15 is a root stage , consists of Stage-20, Stage-21, Stage-5
Stage-20 has a backup stage: Stage-5
Stage-13 depends on stages: Stage-20
Stage-21 has a backup stage: Stage-5
Stage-14 depends on stages: Stage-21
Stage-5
Stage-0 is a root stage
{noformat}
candidate-1
{noformat}
Stage-1 is a root stage , consists of Stage-2, Stage-4, Stage-6
Stage-2 has a backup stage: Stage-6
Stage-3 depends on stages: Stage-2
Stage-4 has a backup stage: Stage-6
Stage-5 depends on stages: Stage-4
Stage-6
Stage-7 depends on stages: Stage-6, Stage-3, Stage-5
Stage-8 is a root stage , consists of Stage-9, Stage-11, Stage-13
Stage-9 has a backup stage: Stage-13
Stage-10 depends on stages: Stage-9
Stage-11 has a backup stage: Stage-13
Stage-12 depends on stages: Stage-11
Stage-13
Stage-14 depends on stages: Stage-13, Stage-10, Stage-12
Stage-15 depends on stages: Stage-7, Stage-14 , consists of Stage-16,
Stage-18, Stage-20
Stage-16 has a backup stage: Stage-20
Stage-17 depends on stages: Stage-16
Stage-18 has a backup stage: Stage-20
Stage-19 depends on stages: Stage-18
Stage-20
Stage-21 depends on stages: Stage-20, Stage-17, Stage-19
Stage-22 is a root stage
{noformat}
candidate-2
{noformat}
Stage-1 is a root stage , consists of Stage-3, Stage-4, Stage-5
Stage-2 is a root stage , consists of Stage-6, Stage-7, Stage-8
Stage-3 has a backup stage: Stage-5
Stage-4 has a backup stage: Stage-5
Stage-5
Stage-6 has a backup stage: Stage-8
Stage-7 has a backup stage: Stage-8
Stage-8
Stage-9 depends on stages: Stage-3
Stage-10 depends on stages: Stage-4
Stage-11 depends on stages: Stage-5, Stage-9, Stage-10
Stage-12 depends on stages: Stage-6
Stage-13 depends on stages: Stage-7
Stage-14 depends on stages: Stage-8, Stage-12, Stage-13
Stage-15 depends on stages: Stage-11, Stage-14 , consists of Stage-16,
Stage-17, Stage-18
Stage-16 has a backup stage: Stage-18
Stage-17 has a backup stage: Stage-18
Stage-18
Stage-19 depends on stages: Stage-16
Stage-20 depends on stages: Stage-17
Stage-21 depends on stages: Stage-18, Stage-19, Stage-20
Stage-22 is a root stage
{noformat}
> Rearrange explain order of stages simpler
> -----------------------------------------
>
> Key: HIVE-4880
> URL: https://issues.apache.org/jira/browse/HIVE-4880
> Project: Hive
> Issue Type: Improvement
> Components: Diagnosability
> Reporter: Navis
> Assignee: Navis
> Priority: Trivial
> Attachments: HIVE-4880.D11733.1.patch
>
>
> Current explain order of stages is not best form to read (and to debug)
> {noformat}
> Before:
> STAGE DEPENDENCIES:
> Stage-1 is a root stage
> Stage-7 depends on stages: Stage-1 , consists of Stage-4, Stage-3, Stage-5
> Stage-4
> Stage-0 depends on stages: Stage-4, Stage-3, Stage-6
> Stage-9 depends on stages: Stage-0
> Stage-2 depends on stages: Stage-9
> Stage-3
> Stage-5
> Stage-6 depends on stages: Stage-5
> After:
> STAGE DEPENDENCIES:
> Stage-1 is a root stage
> Stage-2 depends on stages: Stage-1 , consists of Stage-3, Stage-4, Stage-5
> Stage-3
> Stage-4
> Stage-5
> Stage-6 depends on stages: Stage-5
> Stage-7 depends on stages: Stage-3, Stage-4, Stage-6
> Stage-8 depends on stages: Stage-7
> Stage-9 depends on stages: Stage-8
> {noformat}
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