[HIVE-18062] Revise basic stat states for estimations

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Statistics
• Assignee: Unassigned
• Reporter: Zoltan Haindrich
• Created: 14/Nov/17 15:40
• Updated: 14/Nov/17 15:40

Description

basic stat states might be misleading; because currently estimations also get the COMPLETE qualifier in most cases..

proposed definitions for the states:

• NONE
  • on table: no information (afaik currently this can't happen)
  • estimation tree: all nodes in the estimation tree were NONE
• PARTIAL:
  • on table: the current information is estimated from data size
  • estimation tree: contains at least one NONE/PARTIAL; and at least 1 PARTIAL
• COMPLETE:
  • current information is correct (calculated by statstask-s)
  • estimation tree: the whole subtree has COMPLETE status

document/change states to comply with the above definitions.

followup of HIVE-17934;