Through some minor changes, I have been able to compile the libpq
client libraries on the Win32 platform. Since the libpq communications
part has been rewritten, this has become much easier. Enclosed is
a patch that will allow at least Microsoft Visual C++ to compile
libpq into both a static and a dynamic library.  I will take a look
at porting the psql frontend as well, but I figured it was a good
idea to send in these patches first - so no major changes are done
to the files before it gets applied (if it does).

Regards,
  Magnus Hagander

backend flowchart.

shmem_exit to replace exitpg().

From: t-ishii@sra.co.jp

As mentioned around line 1153 in backend/commands/copy.c, the method
of array checking is not perfect.

test=> create table t1 (i text);
test=> insert into t1 values('{\\.}');
INSERT 2645600 1
test=> select * from t1;
i
-----
{\\.}
(2 rows)
test=> copy t1 to '/tmp/aaa';
test=> copy t1 from '/tmp/aaa';
ERROR:  CopyReadAttribute - end of record marker corrupted

Copy cannot read data produced by itself!