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Remove extra word from src/backend/optimizer/README
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@ -1109,7 +1109,7 @@ of joining relations.
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Partitionwise aggregates/grouping
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Partitionwise aggregates/grouping
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If the GROUP BY clause has contains all of the partition keys, all the rows
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If the GROUP BY clause contains all of the partition keys, all the rows
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that belong to a given group must come from a single partition; therefore,
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that belong to a given group must come from a single partition; therefore,
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aggregation can be done completely separately for each partition. Otherwise,
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aggregation can be done completely separately for each partition. Otherwise,
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partial aggregates can be computed for each partition, and then finalized
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partial aggregates can be computed for each partition, and then finalized
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