Fix ODBC for new binary fopen/open params
This commit is contained in:
Bruce Momjian
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@ -347,3 +347,172 @@ numbers in many other, more commonly exercised, code paths.)
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************
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From owner-pgsql-hackers@hub.org Tue Jan 25 18:34:14 2000
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Message-ID: <388E3EE9.46880647@tm.ee>
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Date: Wed, 26 Jan 2000 02:25:13 +0200
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From: Hannu Krosing <hannu@tm.ee>
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Organization: Trust-O-Matic =?iso-8859-1?Q?O=DC?=
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To: Don Baccus <dhogaza@pacifier.com>
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Cc: Tom Lane <tgl@sss.pgh.pa.us>,
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"Ross J. Reedstrom" <reedstrm@wallace.ece.rice.edu>,
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PostgreSQL Development <pgsql-hackers@postgreSQL.org>
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Subject: Re: Happy column adding (was RE: [HACKERS] Happy columndropping)
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References: <3.0.1.32.20000125113001.00f8acb0@mail.pacifier.com>
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<20000125114453.E423@rice.edu>
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<001401bf6704$5ca7e3a0$2801007e@tpf.co.jp>
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<Pine.GSO.4.02A.10001251152160.11899-100000@Val.DoCS.UU.SE>
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<3.0.1.32.20000125080125.00f7f160@mail.pacifier.com>
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<20000125114453.E423@rice.edu>
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<3.0.1.32.20000125113001.00f8acb0@mail.pacifier.com> <3.0.1.32.20000125151022.00f8c4c0@mail.pacifier.com>
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Status: OR
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Don Baccus wrote:
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>
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> Ahhh...yes. I haven't looked at the inheritance code, yet, but I see
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> what you're saying. I think. Do child-table columns follow parent-table
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> columns by some chance (in today's absolute column number scheme)?
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>
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> >If we were willing to hardwire the assumption that DROP COLUMN never
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> >physically drops a column, but only hides it and adjusts logical column
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> >numbers, then the physical column numbers could serve as permanent IDs;
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> >so we'd only need two numbers not three. This might be good, or not.
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>
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> Yes. But if I'm right about how child-table columns are numbered,
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> wouldn't add column still cause a problem, i.e. you'd still have to
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> change their physical column number?
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If we allow deleted column as a basic feature of postgres,
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it could be like that
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base: COL1 | COL2 | COL3
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child: COL1 | COL2 | COL3 | COL4
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after add column 5 to base table
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base: COL1 | COL2 | COL3 | del4 | COL5
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child: COL1 | COL2 | COL3 | COL4 | COL5
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after add column 6 to child
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base: COL1 | COL2 | COL3 | del4 | COL5
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child: COL1 | COL2 | COL3 | COL4 | COL5 | COL6
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after drop column 2 from base table
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base: COL1 | del2 | COL3 | del4 | COL5
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child: COL1 | del2 | COL3 | COL4 | COL5 | COL6
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dropping column from child table that is not a deleted column in
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parent is not allowed.
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The delN columns are always NULLed on reading tuple and are written as proper
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null columns (taking up space only in NULL bitmask)
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multiple inheritance is tricky and _requires_ unique column ids maybe oids
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from pg_attribute to be doable.
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-----------------
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Hannu
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************
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From owner-pgsql-hackers@hub.org Thu Jan 27 11:48:26 2000
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id 12DsvR-0000HH-00; Thu, 27 Jan 2000 18:41:45 +0100
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Date: Thu, 27 Jan 2000 18:41:45 +0100 (CET)
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From: Peter Eisentraut <peter_e@gmx.net>
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To: Tom Lane <tgl@sss.pgh.pa.us>
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cc: PostgreSQL Development <pgsql-hackers@postgreSQL.org>
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Subject: Re: [HACKERS] Column ADDing issues
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In-Reply-To: <15550.948845404@sss.pgh.pa.us>
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Status: ORr
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On 2000-01-25, Tom Lane mentioned:
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> > Everything has its order and it's not like the inheritance as such is
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> > broken.
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>
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> Yes, a whole bunch of stuff is broken after this happens. Go back and
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> consult the archives --- or maybe Chris Bitmead will fill you in; he's
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> got plenty of scars to show for this set of problems. (All I recall
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> offhand is that pg_dump and reload can fail to generate a working
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> database.) The bottom line is that it would be a lot nicer if column c
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> had the same column position in both the parent table and the child
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> table(s).
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This should be fixed in pg_dump by infering something via the oids of the
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pg_attribute entries. No need to mess up the backend for it.
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Maybe pg_dump should optionally dump schemas in terms of insert into
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pg_something commands rather than actual DDL. ;)
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>
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> I suggest you be very cautious about messing with ALTER TABLE until you
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> understand why inheritance makes it such a headache ;-)
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I'm just trying to get the defaults and constraints working. If
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inheritance stays broken the way it previously was, it's beyond my
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powers. But I get the feeling that people rather not alter their tables
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unless they have *perfect* alter table commands. I don't feel like arguing
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with them, they'll just have to do without then.
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--
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Peter Eisentraut Sernanders väg 10:115
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peter_e@gmx.net 75262 Uppsala
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http://yi.org/peter-e/ Sweden
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************
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@ -725,11 +725,13 @@ debugging purposes. Note that a newline terminates the query, not a
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semicolon. If you have compiled with debugging symbols, you can use a
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debugger to see what is happening. Because the backend was not started
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from the postmaster, it is not running in an identical environment and
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locking/backend interaction problems may not be duplicated. Some
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debuggers can attach to an already-running backend; that is the most
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convenient way to diagnose problems in the normal multi-backend
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environment.
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<P>
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locking/backend interaction problems may not be duplicated.<P>
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Another method is to start <I>psql</I> in one window, then find the
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<small>PID</small> of the <i>postgres</i> process being used by the
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<i>psql.</i> Use a debugger to attach to the <i>postgres</i>
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<small>PID.</small> You can set breakpoints in the debugger and issues
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queries from <i>psql.</i>
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The postgres program has -s, -A, and -t options that can be very useful
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for debugging and performance measurements.<P>
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@ -1061,7 +1063,11 @@ Similarly, you could retrieve the just-assigned SERIAL value with the <I>currval
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INSERT INTO person (name) VALUES ('Blaise Pascal');
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$newID = currval('person_id_seq');
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</PRE>
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Finally, you could use the <A HREF="#4.17">oid</A> returned from the INSERT statement to lookup the default value, though this is probably the least portable approach. In perl, using DBI with Edmund Mergl's DBD::Pg module, the oid value is made available via $sth->{pg_oid_status} after $sth->execute().
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Finally, you could use the <A HREF="#4.17">oid</A> returned from the
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INSERT statement to lookup the default value, though this is probably
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the least portable approach. In perl, using DBI with Edmund Mergl's
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DBD::Pg module, the oid value is made available via
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$sth->{pg_oid_status} after $sth->execute().
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<H4><A NAME="4.16.3">4.16.3</A>) Don't currval() and nextval() lead to a race condition with other
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concurrent backend processes?</H4><P>
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@ -49,6 +49,16 @@ typedef UInt4 Oid;
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#define DRIVER_FILE_NAME "libpsqlodbc.so"
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#endif
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#ifdef WIN32
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#define PG_BINARY O_BINARY
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#define PG_BINARY_R "rb"
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#define PG_BINARY_W "wb"
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#else
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#define PG_BINARY 0
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#define PG_BINARY_R "r"
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#define PG_BINARY_W "w"
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#endif
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/* Limits */
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#ifdef WIN32
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#define BLCKSZ 4096
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