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doc: mention vacuum's removal of commit timestamp information

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Reported-by: Kyotaro HORIGUCHI

Discussion: https://postgr.es/m/20180622.172132.230342845.horiguchi.kyotaro@lab.ntt.co.jp

Co-authored-by: Kyotaro HORIGUCHI

Backpatch-through: 16
pull/150/head
Bruce Momjian 2 years ago
parent 7471230cc6
commit c136eb0298
1 changed files with 2 additions and 1 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 3
      doc/src/sgml/func.sgml

3
doc/src/sgml/func.sgml
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@ -25704,7 +25704,8 @@ SELECT collation for ('foo' COLLATE "de_DE");
They only provide useful data when the They only provide useful data when the
<xref linkend="guc-track-commit-timestamp"/> configuration option is <xref linkend="guc-track-commit-timestamp"/> configuration option is
enabled, and only for transactions that were committed after it was enabled, and only for transactions that were committed after it was
enabled. enabled. Commit timestamp information is routinely removed during
vacuum.
</para> </para>
<table id="functions-commit-timestamp"> <table id="functions-commit-timestamp">

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