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From: Tom Lane <tgl@sss.pgh.pa.us>
To: levins328@126.com
cc: pgsql-docs@lists.postgresql.org
Subject: Re: pg error question
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Comments: In-reply-to PG Doc comments form <noreply@postgresql.org>
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PG Doc comments form <noreply@postgresql.org> writes:
> when we use pgsql 
> a error happens
> ERROR: XX000: unrecognized node type: 68

That's not supposed to happen, so this might be grounds for a bug report,
but you've not provided nearly enough information for anyone to diagnose
it.  Please see

https://wiki.postgresql.org/wiki/Guide_to_reporting_problems

(In any case, I think this is off-topic for pgsql-docs.)

			regards, tom lane