Re: SQL/MED - file_fdw
Robert Haas <robertmhaas@gmail.com>
From: Robert Haas <robertmhaas@gmail.com>
To: Itagaki Takahiro <itagaki.takahiro@gmail.com>
Cc: Shigeru HANADA <hanada@metrosystems.co.jp>, Andrew Dunstan <andrew@dunslane.net>, Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers@postgresql.org
Date: 2010-12-19T03:45:15Z
Lists: pgsql-hackers
On Sat, Dec 18, 2010 at 10:43 PM, Itagaki Takahiro <itagaki.takahiro@gmail.com> wrote: > On Sun, Dec 19, 2010 at 12:18, Robert Haas <robertmhaas@gmail.com> wrote: >> I'm sort of suspicious of the fact that BeginCopyTo() is a shell >> around BeginCopy() while BeginCopyFrom() does a whole bunch of other >> stuff. I haven't grokked what the code is doing here well enough to >> have a concrete proposal though... > > I added Begin/EndCopyTo() just because the internal code looks > symmetric. The proposal doesn't change behaviors of COPY commands > at all. It just exports a part of COPY FROM codes as "File Reader" > so that the file_fdw external module can reuse the code. I believe > we have the conclusion that we should avoid code duplication > to read files in the prior discussion. I'm not questioning any of that. But I'd like the resulting code to be as maintainable as we can make it. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company