Bitmap Index Scan
Short Description
The Bitmap Index Scan node scans an index and produces a bitmap of potential row locations
Detailed Description​
The Bitmap Index Scan node scans an index and produces a bitmap of potential row locations. It feeds this bitmap to its parent node - typically a Bitmap Heap Scan, but possibly a Bitmap And or Bitmap Or operator.
Additional Links​
- PostgreSQL Documentation - Using Explain
- pgAnalyze - Explain
- eTutorials - Understanding How PostgreSQL Executes a Query
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