[IMPALA-10457] Add a note that 'hash x range' and 'range x hash' partition for Kudu tables produce the same result

• Type: Documentation
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Docs
• Epic Color: ghx-label-13
• Assignee: Unassigned
• Reporter: Alexey Serbin
• Created: 28/Jan/21 03:35
• Updated: 28/Jan/21 18:01

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.

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