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In docs, clarify that, without ORDER BY, the window frame is all rows in

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the partition.
This commit is contained in:
Bruce Momjian 2012-08-16 11:32:22 -04:00
parent 5c1b2f5daa
commit c6ce4c1322
1 changed files with 4 additions and 3 deletions
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7
doc/src/sgml/syntax.sgml
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@ -1794,9 +1794,10 @@ UNBOUNDED FOLLOWING
window functions that act on the frame instead of the whole partition.
The default framing option is <literal>RANGE UNBOUNDED PRECEDING</>,
which is the same as <literal>RANGE BETWEEN UNBOUNDED PRECEDING AND
CURRENT ROW</>. This sets the frame to be all rows from the partition start
up through the current row's last peer as specified by <literal>ORDER BY</>,
or all partition rows if there is no <literal>ORDER BY</>.
CURRENT ROW</>. With <literal>ORDER BY</>, this sets the frame to
be all rows from partition start up through the current row's
last peer. Without <literal>ORDER BY</>, all partition rows are
included in the window frame.
</para>
<para>