Apache Phoenix overview
Apache Phoenix is is a SQL layer for Apache HBase that provides a programmatic ANSI SQL interface.
Apache Phoenix implements best-practice optimizations to enable software engineers to develop HBase based next-generation applications that operationalize big data. Using Phoenix, you can create and interact with tables in the form of typical DDL/DML statements using the Phoenix standard JDBC API.
Apache HBase timestamps are the core part of the Apache Phoenix functionality. It is used as part of the Travel in time functionality and by the Transactional engines. Due to this, we expect that the data must have valid timestamps that signifies the time when the record is created. Invalid timestamps cause incorrect behavior for most Apache Phoenix functionalities, such as secondary indexes or CRUD operations. If your data is relying on the special behavior of the record's timestamps or future timestamps, you must not use such data with Apache Phoenix.