question can we match HBase partitions with Impala Partitions? in Archives of Support Questions (Read Only)

can we match HBase partitions with Impala Partitions?

AlinaGHERMAN — Fri, 16 Sep 2022 09:55:58 GMT

Hello,

Impala/ is having better performances on partitioned tables (if they are big enough).

However, I use Impala on an external HBase table. My HBase table is partitioned.

Therefore, I wonder if I can match the HBase partitions with the Impala/Hive ones?

If yes, How can I do this?

Thank you!

Re: can we match HBase partitions with Impala Partitions?

alex.behm — Thu, 07 Jan 2016 07:27:43 GMT

Hi!

HBase tables are range partitioned by the key and Impala will do the equivalent of "partition pruning" for HBase resions if suitable predicates are available in the query. The "PARTITION" concept of HDFS tables is not really applicable to HBase tables. The docs explain this in more detail, including how to interpred Impala's explain plan to see whether region pruning is taking place or not:

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

Does that answer your question?

Re: can we match HBase partitions with Impala Partitions?

ZachRoes — Wed, 18 Jan 2017 01:18:29 GMT

The input data set consists of three tables as shown with the following table creation statements in Impala SQL dialect

Re: can we match HBase partitions with Impala Partitions?

ZachRoes — Wed, 18 Jan 2017 01:42:49 GMT

Yes. Use a spark-hbase-connector.