Questions related to Apache Impala SQL Query Engine.
Apache Impala
...is the open source, native analytic database for Apache Hadoop.
Overview
Impala raises the bar for SQL query performance on Apache Hadoop while retaining a familiar user experience. With Impala, you can query data, whether stored in HDFS or Apache HBase – including SELECT, JOIN, and aggregate functions – in real time. Furthermore, Impala uses the same metadata, SQL syntax (Hive SQL), ODBC driver, and user interface (Hue Beeswax) as Apache Hive, providing a familiar and unified platform for batch-oriented or real-time queries. (For that reason, Hive users can utilize Impala with little setup overhead.)
Reference: Apache Impala | Overview (Apache Impala)
Apache Impala is an open source massively parallel processing SQL query engine for data stored in a computer cluster running Apache Hadoop. Impala has been described as the open-source equivalent of Google F1, which inspired its development in 2012.
Reference: Apache Impala (Wikepedia)