The "error fields" facility in the FE/BE protocol could be extended
in that direction, and I think there's already been some discussion
about it; but no one has stepped up with a concrete proposal, much
less volunteered to do the work ...
Um, if changing the protocol is a bother, you could also add parseable
infos to the error messages...
instead of :
"ERROR: duplicate key violates unique constraint "testinteg_one_key""
it would say
"ERROR: duplicate key violates unique constraint "testinteg_one_key"
[code:"XXXX" error:"integrity" type:"unique" column:"something"
constraint:"testinteg_one_key"]"
Which could be hackfully added by a "parseable" locale (but with a more
restrained form...)
SET lc_messages TO parseable
regards, tom lane
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