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- Gather Merge (cost=1010.12..4877326.97 rows=39806668 width=257) (actual time=297.428..298.910 rows=10.00 loops=1)。谷歌对此有专业解读
Fetch those rows from the “heap” (i.e. the underlying table storage)。wps对此有专业解读
Three changes follow from these results: