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<!-- $PostgreSQL: pgsql/doc/src/sgml/arch-dev.sgml,v 2.30 2007/07/21 04:02:41 tgl Exp $ --> |
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<!-- $PostgreSQL: pgsql/doc/src/sgml/arch-dev.sgml,v 2.31 2007/12/12 06:23:27 tgl Exp $ --> |
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<chapter id="overview"> |
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<chapter id="overview"> |
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<title>Overview of PostgreSQL Internals</title> |
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<title>Overview of PostgreSQL Internals</title> |
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@ -407,7 +407,7 @@ |
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<listitem> |
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<listitem> |
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<para> |
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<para> |
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<firstterm>merge sort join</firstterm>: Each relation is sorted on the join |
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<firstterm>merge join</firstterm>: Each relation is sorted on the join |
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attributes before the join starts. Then the two relations are |
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attributes before the join starts. Then the two relations are |
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scanned in parallel, and matching rows are combined to form |
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scanned in parallel, and matching rows are combined to form |
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join rows. This kind of join is more |
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join rows. This kind of join is more |
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