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nested table in impala

nested table in impala

Contributor

how to create nested table in impala like parquet,does it supported the nested format?

5 REPLIES 5
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Re: nested table in impala

Rising Star

I am not sure which version of Impala you are using, but here is a useful link on Parquet support in Impala 2.2.0 (included in CDH 5.4.0):

http://www.cloudera.com/content/www/en-us/documentation/enterprise/latest/topics/impala_new_features...

(See the section: New Features in Impala Version 2.2.0 / CDH 5.4.0)

 

 

You can find information on a per Impala version basis here:

http://www.cloudera.com/content/www/en-us/documentation/archive/impala/2-x/2-1-x/topics/impala_new_f...

 

Info on creating Impala tables is here (includes Parquet info): 

http://www.cloudera.com/content/www/en-us/documentation/archive/impala/2-x/2-1-x/topics/impala_creat...

Re: nested table in impala

Contributor
thanks sue, i use version 5.4.5 and i see the doc says 'Impala can now run queries against Parquet data containing columns with composite or nested types, as long as the query only refers to columns with scalar types'.

Re: nested table in impala

Master Collaborator
In 2.2 you could not access nested types columns in parquet (you could read
non-nested columns in a table with nested columns).

The initial version of nested types read support is coming in 2.3.0 with
support for reading nested types from parquet. We've talked a bit about it
at various events. The slides from HadoopWorld a month ago are here:
http://conferences.oreilly.com/strata/big-data-conference-ny-2015/public/schedule/detail/43568

Re: nested table in impala

Contributor
tim,thanks you to reply,i look forward to its arrival

Re: nested table in impala

Explorer

Nested table support is coming Impala 2.3 / CDH 5.5. Fingers crossed :)

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