pgsql: Improve sorting speed by pre-extracting the first sort-key column

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От tgl@postgresql.org (Tom Lane)
Тема pgsql: Improve sorting speed by pre-extracting the first sort-key column
Дата
Msg-id 20060226225813.1F6839DC810@postgresql.org
обсуждение исходный текст
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Дерево обсуждения 
Log Message:
-----------
Improve sorting speed by pre-extracting the first sort-key column of
each tuple, as per my proposal of several days ago.  Also, clean up
sort memory management by keeping all working data in a separate memory
context, and refine the handling of low-memory conditions.

Modified Files:
--------------
    pgsql/src/backend/executor:
        nodeSort.c (r1.52 -> r1.53)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeSort.c.diff?r1=1.52&r2=1.53)
    pgsql/src/backend/utils/sort:
        tuplesort.c (r1.59 -> r1.60)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/sort/tuplesort.c.diff?r1=1.59&r2=1.60)

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