Обсуждение: pg_proc without oid?
I notice that this patch: http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h.diff?r1=1.443&r2=1.444 inserts a bunch of XML related rows in pg_proc without specifying oid. This breaks the fmgrtab generator on msvc. Most likely because I didn't think of that case. But since all other rows in pg_proc.h contain the oid, I just wanted to check if they're actually supposed to be withuot oid, or if that was a mistake? //Magnus
Am Montag, 19. Februar 2007 10:16 schrieb Magnus Hagander: > This breaks the fmgrtab generator on msvc. Most likely because I didn't > think of that case. But since all other rows in pg_proc.h contain the > oid, I just wanted to check if they're actually supposed to be withuot > oid, or if that was a mistake? It's intentional. -- Peter Eisentraut http://developer.postgresql.org/~petere/
On Mon, Feb 19, 2007 at 11:25:02AM +0100, Peter Eisentraut wrote: > Am Montag, 19. Februar 2007 10:16 schrieb Magnus Hagander: > > This breaks the fmgrtab generator on msvc. Most likely because I didn't > > think of that case. But since all other rows in pg_proc.h contain the > > oid, I just wanted to check if they're actually supposed to be withuot > > oid, or if that was a mistake? > > It's intentional. Could you explain why, and what the expected result is? Since I can't find any other examples of people doing it :-) (will fix the vc stuff, of course, but still interested in knowing) //Magnus
Peter Eisentraut <peter_e@gmx.net> writes:
> Am Montag, 19. Februar 2007 10:16 schrieb Magnus Hagander:
>> This breaks the fmgrtab generator on msvc. Most likely because I didn't
>> think of that case. But since all other rows in pg_proc.h contain the
>> oid, I just wanted to check if they're actually supposed to be withuot
>> oid, or if that was a mistake?
> It's intentional.
Kindly change that intention.
regards, tom lane
Am Montag, 19. Februar 2007 16:26 schrieb Tom Lane: > Peter Eisentraut <peter_e@gmx.net> writes: > > Am Montag, 19. Februar 2007 10:16 schrieb Magnus Hagander: > >> This breaks the fmgrtab generator on msvc. Most likely because I didn't > >> think of that case. But since all other rows in pg_proc.h contain the > >> oid, I just wanted to check if they're actually supposed to be withuot > >> oid, or if that was a mistake? > > > > It's intentional. > > Kindly change that intention. What is wrong? -- Peter Eisentraut http://developer.postgresql.org/~petere/
Peter Eisentraut <peter_e@gmx.net> writes:
> Am Montag, 19. Februar 2007 16:26 schrieb Tom Lane:
>> Peter Eisentraut <peter_e@gmx.net> writes:
>>> Am Montag, 19. Februar 2007 10:16 schrieb Magnus Hagander:
>>>> This breaks the fmgrtab generator on msvc.
>>
>>> It's intentional.
>>
>> Kindly change that intention.
> What is wrong?
Well, in the first place Gen_fmgrtab.sh is producing garbage:
#define F_CURSOR_TO_XML DATAINSERT
#define F_CURSOR_TO_XMLSCHEMA DATAINSERT
#define F_QUERY_TO_XML DATAINSERT
#define F_QUERY_TO_XML_AND_XMLSCHEMA DATAINSERT
#define F_QUERY_TO_XMLSCHEMA DATAINSERT
#define F_TABLE_TO_XML DATAINSERT
#define F_TABLE_TO_XML_AND_XMLSCHEMA DATAINSERT
#define F_TABLE_TO_XMLSCHEMA DATAINSERT
#define F_BYTEAOUT 31
#define F_CHAROUT 33
const FmgrBuiltin fmgr_builtins[] = { { 0, "cursor_to_xml", 5, true, false, cursor_to_xml }, { 0,
"cursor_to_xmlschema",4, true, false, cursor_to_xmlschema }, { 0, "query_to_xml", 4, true, false, query_to_xml }, { 0,
"query_to_xml_and_xmlschema",4, true, false, query_to_xml_and_xmlschema }, { 0, "query_to_xmlschema", 4, true, false,
query_to_xmlschema}, { 0, "table_to_xml", 4, true, false, table_to_xml }, { 0, "table_to_xml_and_xmlschema", 4, true,
false,table_to_xml_and_xmlschema }, { 0, "table_to_xmlschema", 4, true, false, table_to_xmlschema }, { 31, "byteaout",
1,true, false, byteaout },
The fact that that table is broken means you're incurring expensive
linear searches to invoke these functions. It's only by chance that
it works at all...
In the second place, if you don't want to predetermine OIDs for your
functions then they shouldn't be in hardwired pg_proc.h rows at all.
regards, tom lane
"Tom Lane" <tgl@sss.pgh.pa.us> writes: > In the second place, if you don't want to predetermine OIDs for your > functions then they shouldn't be in hardwired pg_proc.h rows at all. Is there any place to hook in to create things like procedures or other SQL objects that don't really need hard coded OIDs? It seems like we could make the catalogs much easier to maintain by ripping out everything that isn't needed by the system tables themselves and having initdb create them by running a plain SQL script. In particular I'm looking towards having all the operators and associated hardware except for the basic btree operators for types used by the system tables be created in plain SQL. It might also reduce the pain OID conflicts cause. -- Gregory Stark EnterpriseDB http://www.enterprisedb.com
Am Montag, 19. Februar 2007 16:50 schrieb Tom Lane: > Well, in the first place Gen_fmgrtab.sh is producing garbage: Uh, ok, that needs fixing. > In the second place, if you don't want to predetermine OIDs for your > functions then they shouldn't be in hardwired pg_proc.h rows at all. Where else would you put them? -- Peter Eisentraut http://developer.postgresql.org/~petere/
Peter Eisentraut <peter_e@gmx.net> writes:
> Am Montag, 19. Februar 2007 16:50 schrieb Tom Lane:
>> In the second place, if you don't want to predetermine OIDs for your
>> functions then they shouldn't be in hardwired pg_proc.h rows at all.
> Where else would you put them?
SQL script maybe, much along the lines Greg was just mentioning.
(I'd been thinking myself earlier that pg_amop/amproc/etc would be a
whole lot easier to maintain if we could feed CREATE OPERATOR CLASS
commands to the bootstrap process.) But getting there will take
nontrivial work; you can't just decide to leave out a few OIDs on the
spur of the moment.
Magnus, I'd suggest reverting whatever you did to your MSVC script,
so we'll find out the next time someone makes this mistake...
regards, tom lane
Peter Eisentraut wrote: > Am Montag, 19. Februar 2007 16:50 schrieb Tom Lane: > > Well, in the first place Gen_fmgrtab.sh is producing garbage: > > Uh, ok, that needs fixing. > > > In the second place, if you don't want to predetermine OIDs for your > > functions then they shouldn't be in hardwired pg_proc.h rows at all. > > Where else would you put them? But _why_ wouldn't you want to have fixed OIDs for the functions? I'm not seeing the benefit. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.
Tom Lane wrote: > SQL script maybe, much along the lines Greg was just mentioning. I would welcome that, although a similar suggestion was rejected a few years ago, which is why I didn't pursue it here. > you can't just decide to leave out a few OIDs on the > spur of the moment. I still don't understand why that would be a problem, aside from the fmgrtab problem that is specific to pg_proc. Other system catalogs also have mixed entries with and without explicit OIDs. -- Peter Eisentraut http://developer.postgresql.org/~petere/
On Mon, Feb 19, 2007 at 11:18:36AM -0500, Tom Lane wrote: > Peter Eisentraut <peter_e@gmx.net> writes: > > Am Montag, 19. Februar 2007 16:50 schrieb Tom Lane: > >> In the second place, if you don't want to predetermine OIDs for your > >> functions then they shouldn't be in hardwired pg_proc.h rows at all. > > > Where else would you put them? > > SQL script maybe, much along the lines Greg was just mentioning. > (I'd been thinking myself earlier that pg_amop/amproc/etc would be a > whole lot easier to maintain if we could feed CREATE OPERATOR CLASS > commands to the bootstrap process.) But getting there will take > nontrivial work; you can't just decide to leave out a few OIDs on the > spur of the moment. > > Magnus, I'd suggest reverting whatever you did to your MSVC script, > so we'll find out the next time someone makes this mistake... Ok. Will do once the entires in pg_proc are changed, so that I can still build. BTW, another problem with the stuff that's in there now - pg_proc.h contains description entries for the functions, but that never goes in to pg_description, since there is no oid to bind it to... //Magnus
Am Dienstag, 20. Februar 2007 09:24 schrieb Magnus Hagander: > Ok. Will do once the entires in pg_proc are changed, so that I can still > build. It's done. -- Peter Eisentraut http://developer.postgresql.org/~petere/
On Mon, Feb 19, 2007 at 11:18:36AM -0500, Tom Lane wrote: > > Magnus, I'd suggest reverting whatever you did to your MSVC script, > so we'll find out the next time someone makes this mistake... > Reverted. I left the part in genbki.pl in there, because that's a plain bug that was exposed by this, and could at least theoretically be exposed in other ways as well. //Magnus