This patch fix a TODO list item.
* require SELECT DISTINCT target list to have all ORDER BY columns

example
ogawa=> select distinct x from t1 order by y;
ERROR:  ORDER BY columns must appear in SELECT DISTINCT target list

---
Atsushi Ogawa

23 Jul 99.  Not sure why this didn't get applied before...

logfile.c wanted ... seems easier to fix BufFileSeek.

in the backend.  Still a few stragglers, but we're getting closer to
being rid of query length limits...

boundary-condition bug in myinput() which caused flex scanner to fail
on tokens larger than a bufferload.  Turns out flex doesn't want null-
terminated input ... and if it gives you a 1-character buffer, you'd
better supply a character, not a null, lest you be thought to be
reporting end of input.

topmost SELECT node after rearranging query tree.

proc_exit time.  I discovered that if the frontend closes the connection
when you're inside a transaction block, there is nothing ensuring that
temp files go away ... I wonder whether proc_exit ought to try to do an
explicit transaction abort?

a generalized module 'tuplesort.c' that can sort either HeapTuples or
IndexTuples, and is not tied to execution of a Sort node.  Clean up
memory leakages in sorting, and replace nbtsort.c's private implementation
of mergesorting with calls to tuplesort.c.

recycle storage within sort temp file on a block-by-block basis.  This
reduces peak disk usage to essentially just the volume of data being
sorted, whereas it had been about 4x the data volume before.

this is neccesary to make sure that the backend and
the database uses same RELSEG_SIZE.

>From the ORACLE 7 SQL Language Reference Manual:
-----------------------------------------------------
COMMENT

Purpose:

To add a comment about a table, view, snapshot, or
column into the data dictionary.

Prerequisites:

The table, view, or snapshot must be in your own
schema
or you must have COMMENT ANY TABLE system privilege.

Syntax:

COMMENT ON [ TABLE table ] |
           [ COLUMN table.column] IS 'text'

You can effectively drop a comment from the database
by setting it to the empty string ''.
-----------------------------------------------------

Example:

COMMENT ON TABLE workorders IS
   'Maintains base records for workorder information';

COMMENT ON COLUMN workorders.hours IS
   'Number of hours the engineer worked on the task';

to drop a comment:

COMMENT ON COLUMN workorders.hours IS '';

The current patch will simply perform the insert into
pg_description, as per the TODO. And, of course, when
the table is dropped, any comments relating to it
or any of its attributes are also dropped. I haven't
looked at the ODBC source yet, but I do know from
an ODBC client standpoint that the standard does
support the notion of table and column comments.
Hopefully the ODBC driver is already fetching these
values from pg_description, but if not, it should be
trivial.

Hope this makes the grade,

Mike Mascari
(mascarim@yahoo.com)

Vince.

BufFile so that it handles multi-segment temporary files transparently.
This allows sorts and hashes to work with data exceeding 2Gig (or whatever
the local limit on file size is).  Change psort.c to use relative seeks
instead of absolute seeks for backwards scanning, so that it won't fail
when the data volume exceeds 2Gig.

I have changed a bit the makefiles for the win32 port - the *.def files
(created when building shared libraries) are now clean from
Makefile.shlib.

I have also removed "-g" from CFLAGS in the "cygwin32" template - it can
be
enabled when running configure.

                        Dan

database, but they get truncated at the first NUL by lo_read
when they are read back. The reason for this is that lo_read in
Pg.xs is using the default:
    OUTPUT:
        RETVAL
        buf
which uses C's strlen() to work out the length of the scalar.

The code ought to read something more like:
    OUTPUT:
        RETVAL
        buf sv_setpvn((SV*)ST(2), buf, RETVAL);

I am not sure if this needs to be done on both lo_read methods
in this file, but I changed both and have not since had any
problems with truncated BLOBs.

Douglas Thomson <dougt@mugc.cc.monash.edu.au>

Cygwin snapshots (tested on 990115 which is recommended to use - it fixes
some errors in B20.1)

And I have another patch for including <sys/ipc.h> before <sys/sem.h> in
backend/storage/lmgr/proc.c - it is required due the design of cygipc
headers

                        Dan