Apache Calcite 1.9.0 发布了,Apache Calcite 是一个动态数据管理框架,用于 Hadoop 平台。这次发行的版本包括了超过30个的bug修复,小的提升以及计划规则和APIs的内部变化。
改进记录如下:
新特性:
the capability to recognize and translate Timeseries and TopN Druid queries
added new SQL features too, e.g., support for
LATERAL TABLE
avoiding doing the same join twice in the presence of
COUNT DISTINCT
being able to simplify the expressions in the plan further.
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