Github user cloud-fan commented on the issue:
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thanks, merging to master!
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Github user liancheng commented on the issue:
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Unfortunately I'm having network issue here and failed to fetch the branch
from GitHub :(
@cloud-fan Could you please help merge this one? Thanks.
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Github user dongjoon-hyun commented on the issue:
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Definitely, it's my bad. I should spend more time to make a reasonable
scenario from the first.
Thank you, @liancheng , @cloud-fan , @gatorsmile .
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Github user liancheng commented on the issue:
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Thanks for the examples. This makes sense and LGTM now. Merging into master.
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Github user dongjoon-hyun commented on the issue:
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@gatorsmile Does it make sense to you? I inserted SQL case for you. :)
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Github user dongjoon-hyun commented on the issue:
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Hi, All. Here is a better example.
I'll update the PR description with this.
Thank you, all.
**Target Scenario**
```scala
scala> val dsView1 = spark.range(8).repartition
Github user dongjoon-hyun commented on the issue:
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By the way, this PR is about improving the existing `CollapseRepartition`,
not about introducing new one. :)
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Github user dongjoon-hyun commented on the issue:
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Hi, @cloud-fan , @liancheng , @gatorsmile .
We can imagine some data sciences environment having many predefined
system-wide tables or datasets. But, here, I simplify that into an extr
Github user dongjoon-hyun commented on the issue:
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Thank you for review, @gatorsmile . You work at night, too! :)
BTW, as you know, I don't have a real query. May I make some sample queries
from my mind?
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Github user gatorsmile commented on the issue:
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Can you show us an example query?
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Github user dongjoon-hyun commented on the issue:
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There are three possibilities.
1. User mistakes. (Rarely)
2. Intermediate results of optimization. (More frequently.)
3. `View` (or pre-designed `Dataset`).
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Github user liancheng commented on the issue:
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Under what circumstances will a user use 2 or more adjacent re-partitioning
operators?
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Github user dongjoon-hyun commented on the issue:
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Ping @cloud-fan and @yhuai . :)
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Github user dongjoon-hyun commented on the issue:
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Hi, @yhuai .
Could you review this PR when you have some time?
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Github user cloud-fan commented on the issue:
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LGTM, cc @yhuai to take another look
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Rebased to the master.
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Hi, @cloud-fan .
Could you review `CollapseRepartition` optimizer again when you have some
time?
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Github user dongjoon-hyun commented on the issue:
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@rxin .
For this `CollapseRepartition` optimizer, may I split into another file?
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Retest this please.
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Github user dongjoon-hyun commented on the issue:
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Hi, @cloud-fan and @yhuai .
I added more description about the logic. I hope that makes the intention
of this PR more clear.
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Github user dongjoon-hyun commented on the issue:
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Hi, @cloud-fan .
Now, this PR can handle all combinations of Repartition and RepartitionBy.
I updated the description of PR and JIRA, too.
Thank you so much for making this PR much u
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