Re: [DOCS] ROW or RANGE not optional in range specification
David G. Johnston david.g.johns...@gmail.com writes:
Either I'm confused about the syntax description rules or the documentation
for this aspect of window definitions is wrong.
The expression:
[ RANGE | ROWS ] BETWEEN frame_start AND frame_end
means that the specification of range or rows is optional - but that
doesn't appear to be the case...
The documentation should read:
{ RANGE | ROWS } BETWEEN frame_start AND frame_end
Yup, you're right. Thanks for spotting that!
regards, tom lane
--
Sent via pgsql-docs mailing list (pgsql-docs@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-docs
[DOCS] ROW or RANGE not optional in range specification
http://www.postgresql.org/docs/devel/static/sql-select.html
Either I'm confused about the syntax description rules or the documentation
for this aspect of window definitions is wrong.
The expression:
[ RANGE | ROWS ] BETWEEN frame_start AND frame_end
means that the specification of range or rows is optional - but that
doesn't appear to be the case...
The documentation should read:
{ RANGE | ROWS } BETWEEN frame_start AND frame_end
Same goes for the bare frame_start specification preceding the between
version.
The bare version looks funny without tag but ORDER BY idx BETWEEN 5
PRECEDING AND CURRENT ROW isn't obviously wrong until you get a syntax
error...
David J.
