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https://issues.apache.org/jira/browse/IMPALA-10457?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexey Serbin updated IMPALA-10457:
-----------------------------------
Description:
I stumbled upon on a fact that in Impala prior to version 4 the syntax for
{{CREATE TABLE}} doesn't allow specifying {{range x hash}} partition, the only
acceptable syntax is {{hash x range}}, as reflected in
[IMPALA-7686|https://issues.apache.org/jira/browse/IMPALA-7686].
With knowledge on Kudu partitioning, it's rather self-obvious that {{hash x
range}} and {{range x hash}} should result in the same layout of data across
Kudu tablets, but it would be great to explicitly document that (probably, with
the reference to this page
https://kudu.apache.org/docs/schema_design.html#hash-range-partitioning-example
?).
Probably, the best place to add the note is:
https://impala.apache.org/docs/build/html/topics/impala_kudu.html#ariaid-title17
was:
I stumbled upon on a fact that in Impala prior to version 4 the syntax for
{{CREATE TABLE}} doesn't allow specifying {{range x hash}} partition, the only
acceptable syntax is {{hash x range}}, as reflected in
[IMPALA-7686|https://issues.apache.org/jira/browse/IMPALA-7686].
With knowledge on Kudu partitioning its self-obvious that 'hash x range' and
'range x hash' should result in the same layout of data across Kudu tablets,
but it's would be great to explicitly document that (probably, with the
reference to this page
https://kudu.apache.org/docs/schema_design.html#hash-range-partitioning-example
?).
Probably, the best place to add the note is:
https://impala.apache.org/docs/build/html/topics/impala_kudu.html#ariaid-title17
> Add a note that 'hash x range' and 'range x hash' partition for Kudu tables
> produce the same result
> ---------------------------------------------------------------------------------------------------
>
> Key: IMPALA-10457
> URL: https://issues.apache.org/jira/browse/IMPALA-10457
> Project: IMPALA
> Issue Type: Documentation
> Components: Docs
> Reporter: Alexey Serbin
> Priority: Minor
>
> I stumbled upon on a fact that in Impala prior to version 4 the syntax for
> {{CREATE TABLE}} doesn't allow specifying {{range x hash}} partition, the
> only acceptable syntax is {{hash x range}}, as reflected in
> [IMPALA-7686|https://issues.apache.org/jira/browse/IMPALA-7686].
> With knowledge on Kudu partitioning, it's rather self-obvious that {{hash x
> range}} and {{range x hash}} should result in the same layout of data across
> Kudu tablets, but it would be great to explicitly document that (probably,
> with the reference to this page
> https://kudu.apache.org/docs/schema_design.html#hash-range-partitioning-example
> ?).
> Probably, the best place to add the note is:
> https://impala.apache.org/docs/build/html/topics/impala_kudu.html#ariaid-title17
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