Re: Conflict handling for COPY FROM

I think making ERROR a reserved word is a terrible idea, and we don't
need it for this feature anyway. Use a new option in the parenthesized
options list instead.

error_limit being an integer, please don't use it as a boolean:

if (cstate->error_limit)
...

Add an explicit comparison to zero instead, for code readability.
Also, since each error decrements the same variable, it becomes hard to
reason about the state: at the end, are we ending with the exact number
of errors, or did we start with the feature disabled? I suggest that
it'd make sense to have a boolean indicating whether this feature has
been requested, and the integer is just the remaining allowed problems.

Line 3255 or thereabouts contains an excess " char

The "warn about it" comment is obsolete, isn't it? There's no warning
there.

--
Álvaro Herrera https://www.2ndQuadrant.com/
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