×
  • Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
 

The PostgreSQL Query Planner

by on Oct 04, 2010

  • 4,895 views

Robert Haas ...

Robert Haas

Why does my query need a plan? Sequential scan vs. index scan. Join strategies. Join reordering. Joins you can't reorder. Join removal. Aggregates and DISTINCT. Using EXPLAIN. Row count and cost estimation. Things the query planner doesn't understand. Other ways the planner can fail. Parameters you can tune. Things that are nearly always slow. Redesigning your schema. Upcoming features and future work.

Statistics

Views

Total Views
4,895
Views on SlideShare
4,894
Embed Views
1

Actions

Likes
3
Downloads
66
Comments
0

1 Embed 1

http://localhost 1

Accessibility

Upload Details

Uploaded via SlideShare as OpenOffice

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
Post Comment
Edit your comment

The PostgreSQL Query Planner The PostgreSQL Query Planner Presentation Transcript