What impala use for authentication?

Can impala do user-defined functions (udfs)?

State use cases of impala?

How does impala process join queries for large tables?

What happens if there is an error in impala?

Is Mapreduce Required For Impala? Will Impala Continue To Work As Expected If Mapreduce Is Stopped?

What Are Good Use Cases For Impala As Opposed To Hive Or MapReduce?

What kinds of impala queries or data are best suited for hbase?

Is impala intended to handle real time queries in low-latency applications or is it for ad hoc queries for the purpose of data exploration?

Is impala production ready?

What are the main features of impala?

Where can I find impala documentation?

What features from relational databases or hive are not available in impala?

Is hive an impala requirement?

When does impala hold on to or return memory?