commit | cecfece459b0f5f155c0498811985e083813aa20 | [log] [tgz] |
---|---|---|
author | Zoltan Haindrich <kirk@rxd.hu> | Mon Mar 23 08:50:28 2020 +0000 |
committer | Zoltan Haindrich <kirk@rxd.hu> | Wed May 06 23:21:43 2020 +0200 |
tree | f7ba5bfe9b8ef7834e2ec2b3f29d0c46f16ee235 | |
parent | d1aae57fad71bf10942d4c53b339363537927c29 [diff] |
[CALCITE-3887] Filter and Join conditions may not need to retain nullability during simplifications In some cases a combination of rule transformations could lead to new filter/join conditions which are not necessarily nullable anymore. However the nullable type was retained - with the insertion of a CAST.
Apache Calcite is a dynamic data management framework.
It contains many of the pieces that comprise a typical database management system but omits the storage primitives. It provides an industry standard SQL parser and validator, a customisable optimizer with pluggable rules and cost functions, logical and physical algebraic operators, various transformation algorithms from SQL to algebra (and the opposite), and many adapters for executing SQL queries over Cassandra, Druid, Elasticsearch, MongoDB, Kafka, and others, with minimal configuration.
For more details, see the home page.