From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: [COMMITTERS] pgsql: Mark JSON error detail messages for translation. |
Date: | 2012-06-12 21:26:46 |
Message-ID: | 24035.1339536406@sss.pgh.pa.us |
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Lists: | pgsql-committers pgsql-hackers |
Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> I am not sure about the idea of letting the detail run to the end of the
> line; that would be problematic should the line be long (there might not
> be newlines in the literal at all, which is not that unusual). I think
> it should be truncated at, say, 76 chars or so.
Yeah, I was wondering about trying to provide a given amount of context
instead of fixing it to "one line". We could do something like
(1) back up N characters;
(2) find the next newline, if there is one at least M characters before
the error point;
(3) print from there to the error point.
This would give between M and N characters of context, except when the
error point is less than M characters from the start of the input. Not
sure how to display such text together with a line number though; with a
multi-line fragment it would not be obvious which part the line number
refers to. (Backing up over multibyte data might be a bit complicated
too, but I assume we can think of something workable for that.)
regards, tom lane
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