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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Shaozhong SHI <shishaozhong@gmail.com>
cc: pgsql-sql <pgsql-sql@lists.postgresql.org>
Subject: Re: How come column is locked?
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Comments: In-reply-to Shaozhong SHI <shishaozhong@gmail.com>
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Shaozhong SHI <shishaozhong@gmail.com> writes:
> I used
> create table if not exists waternetwork1.walknetwortt3 (fid integer[]);
> in do statement.

Perhaps the table already existed, with some other column list?

> When I use
> insert into waternetwork1.walknetwortt3 select fid from a function
> it failed.

"It failed" is totally inadequate as a description of the problem.
Did you read the error message?  What does it say, exactly?

			regards, tom lane