GroupAggregate
Short Description
The GroupAggregate node takes pre-sorted input and aggregates them.
Detailed Description​
The GroupAggregate node takes pre-sorted input and aggregates them. This can be seen in GROUP BY operations. GroupAggregate operations do not use much memory as they operate on pre-sorted data.
Additional Links​
- PostgreSQL Documentation - Using Explain
- pgAnalyze - Explain
- eTutorials - Understanding How PostgreSQL Executes a Query
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