Support Questions
Find answers, ask questions, and share your expertise
Alert: Welcome to the Unified Cloudera Community. Former HCC members be sure to read and learn how to activate your account here.

Impala concurrent refresh & query


Impala concurrent refresh & query

New Contributor

I'm using Impala with parquet table and staging phase described here:

All looks good but I'm wondering how Impala actually handles concurrent read/write? 
I mean, what will happen if  I overwrite a parquet file in the data warehouse and refresh the corresponding table while another person's querying that table?