SetOp
Short Description
The SetOp node handles Set Operations such as INETRSECT or EXCEPT
Detailed Description​
The SetOp node handles Set Operations such as INTERSECT or EXCEPT. These unions can use sorted or hashed input strategies. SQL UNION operations are not handled by SetOp, but by an append node - either Append or MergeAppend.
Additional Links​
- PostgreSQL Documentation - Using Explain
- pgAnalyze - Explain
- eTutorials - Understanding How PostgreSQL Executes a Query
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