[CALCITE-594] Add RelDistribution trait and Exchange relational expression

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.1.0-incubating
• Assignee: Ashutosh Chauhan
• Reporter: Ashutosh Chauhan
• Created: 10/Feb/15 02:51
• Updated: 23/Mar/15 08:08
• Resolved: 18/Feb/15 01:43

Description

Calcite is increasingly targeting to support distributed execution engines. Any distributed sql engine has Shuffle/Exchange operator to shuffle their data with other deamons in the runtime system. It will be useful to add a notion of Shuffle RelNode as a first class citizen in Calcite.