[HIVE-6007] Make the output of the reduce side plan optimized by the correlation optimizer more reader-friendly.

• Type: Sub-task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Component/s: Query Processor
• Assignee: Yin Huai
• Reporter: Yin Huai
• Created: 11/Dec/13 14:32
• Updated: 11/Dec/13 14:32

Description

Because a MuxOperator can have multiple parents, the output of the plan can show the sub-plan starting from this MuxOperator multiple times, which makes the reduce side plan confusing. An example is shown in https://mail-archives.apache.org/mod_mbox/hive-user/201312.mbox/%3CCAO0ZKSjniR0z%2BOt4KWouq236fKXo%3D5nE_Oih7A87e3HiuBsG9w%40mail.gmail.com%3E.