Don't force the data width to extend all the way to the right margin if it
doesn't need to. This reverts the behavior in non-wrapping cases to be
what it was in 9.4. Also, make the logic that ensures the data line width
is at least equal to the record-header line width a little less obscure.
In passing, avoid possible calculation of log10(0). Probably that's
harmless, given the lack of field complaints, but it seems risky:
conversion of NaN to an integer isn't well defined.
This area was rather heavily whacked around in 6513633b9 and follow-on
commits, and it was showing it, because the logic to calculate the
allowable data width in wrapped expanded mode had only the vaguest
relationship to the logic that was actually printing the data. It was
not very close to being right about the conditions requiring overhead
columns to be added. Aside from being wrong, it was pretty unreadable
and under-commented. Rewrite it so it corresponds to what the printing
code actually does.
In passing, remove a couple of dead tests in the printing logic, too.
Per a complaint from Jeff Janes, though this doesn't look much like his
patch because it fixes a number of other corner-case bogosities too.
One such fix that's visible in the regression test results is that
although the code was attempting to enforce a minimum data width of
3 columns, it sometimes left less space than that available.
Remove the code in plpgsql that suppressed the innermost line of CONTEXT
for messages emitted by RAISE commands. That was never more than a quick
backwards-compatibility hack, and it's pretty silly in cases where the
RAISE is nested in several levels of function. What's more, it violated
our design theory that verbosity of error reports should be controlled
on the client side not the server side.
To alleviate the resulting noise increase, introduce a feature in libpq
and psql whereby the CONTEXT field of messages can be suppressed, either
always or only for non-error messages. Printing CONTEXT for errors only
is now their default behavior.
The actual code changes here are pretty small, but the effects on the
regression test outputs are widespread. I had to edit some of the
alternative expected outputs by hand; hopefully the buildfarm will soon
find anything I fat-fingered.
In passing, fix up (again) the output line counts in psql's various
help displays. Add some commentary about how to verify them.
Pavel Stehule, reviewed by Petr Jelínek, Jeevan Chalke, and others
If set, the pager will not be used unless this many lines are to be
displayed, even if that is more than the screen depth. Default is zero,
meaning it's disabled.
There is probably more work to be done in giving the user control over
when the pager is used, particularly when wide output forces use of the
pager regardless of how many lines there are, but this is a start.
Revert the output of the individual backslash commands that change print
settings back to the 9.3 way (not showing the command name in
parentheses). Implement \pset without arguments separately, showing all
settings with values in a table form.
With the unicode linestyle, this adds support to control if the
column, header, or border style should be single or double line
unicode characters. The default remains 'single'.
In passing, clean up the border documentation and address some
minor formatting/spelling issues.
Pavel Stehule, with some additional changes by me.
feasible to display tables that have both many columns and some large
data in some columns (such as pg_stats).
Emre Hasegeli with review and rewriting from Sergey Muraviov and
reviewed by Greg Stark
Tom Lane
Bruce Momjian
Andrew Dunstan
Peter Eisentraut
Stephen Frost
Greg Stark
Robert Haas