As per the documentation, the INVALIDATE METADATA command marks one or all tables’ metadata as stale. The next time the Impala service runs a query
Category: Apache Impala
Apache Impala or Cloudera’s Impala
The terms Cloudera Impala and Apache Impala are frequently confused. Cloudera Inc. is the initial designer/developer of Impala. It was, however, donated to Apache in
UPSERT in SQL
The UPSERT statement combines the INSERT and UPDATE statements into one statement. If another row with the identical set of primary key values already exists
Apache Impala – Introduction
Apache Impala allows you to run SQL queries on data stored in major Apache Hadoop file formats with high performance and low latency. Rather than
Definitions of Big Data, Hadoop and Ecosystem Components
Commonly used terms in Hadoop / Big Data are described in this post. VMWare: A hypervisor is installed on the physical server using VMware server
Apache Impala Architecture
Impala is a massively parallel query engine that runs on hundreds of servers in existing Hadoop clusters. Unlike standard relational database management systems, where query
Big Data & SQL 