Index Only Scan
Short Description
The Index-Only Scan node scans only the specified indexes and will not visit parent tables
Detailed Description​
The Index Only Scan node scans only indexes and will not visit parent tables. This makes it potentially faster than the Index Scan node, but with the caveats that the index must support index scanning, and it must contain all the columns to required by this stage of the query.
Additional Links​
- PostgreSQL Documentation - Using Explain
- pgAnalyze - Explain
- eTutorials - Understanding How PostgreSQL Executes a Query
Search online​
If this article doesn't have the information you need you can try searching online. Remember, you can contribute suggestions to this page.