Обсуждение: List of shorthand casts
Is the list of shorthand casts documented somewhere? If so can you please direct me to it. A working URL would be great. Many thanks.
FarjadFarid(ChkNet) wrote > Is the list of shorthand casts documented somewhere? > If so can you please direct me to it. A working URL would be great. Do you mean implicit casts - those that do not require an explicit CAST(...) or "::" in the query? Can you give an example of one that you know exists? The catalog is probably the best way to get a definitive list though I do not know the exact query you would use. The catalog tables are fairly well documented so you should start there. David J. -- View this message in context: http://postgresql.nabble.com/List-of-shorthand-casts-tp5829791p5829795.html Sent from the PostgreSQL - general mailing list archive at Nabble.com.
Hi David, I mean the ones with "::" like ::text or ::uuid etc Some of Postgresql data types have two words or more like "double precision" or " timestamp without time zone". It is not clear how these are implemented if at all. Many thank. -----Original Message----- From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of David G Johnston Sent: 09 December 2014 20:23 To: pgsql-general@postgresql.org Subject: Re: [GENERAL] List of shorthand casts FarjadFarid(ChkNet) wrote > Is the list of shorthand casts documented somewhere? > If so can you please direct me to it. A working URL would be great. Do you mean implicit casts - those that do not require an explicit CAST(...) or "::" in the query? Can you give an example of one that you know exists? The catalog is probably the best way to get a definitive list though I do not know the exact query you would use. The catalog tables are fairly well documented so you should start there. David J. -- View this message in context: http://postgresql.nabble.com/List-of-shorthand-casts-tp5829791p5829795.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
"FarjadFarid\(ChkNet\)" <farjad.farid@checknetworks.com> writes:
> I mean the ones with "::" like ::text or ::uuid etc
> Some of Postgresql data types have two words or more like "double precision"
> or " timestamp without time zone". It is not clear how these are
> implemented if at all.
Any type name works fine after "::".
regards, tom lane
On 12/09/2014 01:37 PM, FarjadFarid(ChkNet) wrote: > Hi David, > > I mean the ones with "::" like ::text or ::uuid etc > > Some of Postgresql data types have two words or more like "double precision" > or " timestamp without time zone". It is not clear how these are > implemented if at all. Try the query below to get most of the casts available: select castsource::regtype, casttarget::regtype from pg_cast order by castsource; For more info and caveats see: http://www.postgresql.org/docs/9.3/interactive/catalog-pg-cast.html > > Many thank. > > -----Original Message----- > From: pgsql-general-owner@postgresql.org > [mailto:pgsql-general-owner@postgresql.org] On Behalf Of David G Johnston > Sent: 09 December 2014 20:23 > To: pgsql-general@postgresql.org > Subject: Re: [GENERAL] List of shorthand casts > > FarjadFarid(ChkNet) wrote >> Is the list of shorthand casts documented somewhere? >> If so can you please direct me to it. A working URL would be great. > > Do you mean implicit casts - those that do not require an explicit CAST(...) > or "::" in the query? > > Can you give an example of one that you know exists? > > The catalog is probably the best way to get a definitive list though I do > not know the exact query you would use. The catalog tables are fairly well > documented so you should start there. > > David J. -- Adrian Klaver adrian.klaver@aklaver.com
Got it thanks.
-----Original Message-----
From: pgsql-general-owner@postgresql.org
[mailto:pgsql-general-owner@postgresql.org] On Behalf Of Tom Lane
Sent: 09 December 2014 21:40
To: FarjadFarid(ChkNet)
Cc: 'David G Johnston'; pgsql-general@postgresql.org
Subject: Re: [GENERAL] List of shorthand casts
"FarjadFarid\(ChkNet\)" <farjad.farid@checknetworks.com> writes:
> I mean the ones with "::" like ::text or ::uuid etc
> Some of Postgresql data types have two words or more like "double
precision"
> or " timestamp without time zone". It is not clear how these are
> implemented if at all.
Any type name works fine after "::".
regards, tom lane
--
Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make
changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general
Thanks. -----Original Message----- From: Adrian Klaver [mailto:adrian.klaver@aklaver.com] Sent: 09 December 2014 21:46 To: FarjadFarid(ChkNet); 'David G Johnston'; pgsql-general@postgresql.org Subject: Re: [GENERAL] List of shorthand casts On 12/09/2014 01:37 PM, FarjadFarid(ChkNet) wrote: > Hi David, > > I mean the ones with "::" like ::text or ::uuid etc > > Some of Postgresql data types have two words or more like "double precision" > or " timestamp without time zone". It is not clear how these are > implemented if at all. Try the query below to get most of the casts available: select castsource::regtype, casttarget::regtype from pg_cast order by castsource; For more info and caveats see: http://www.postgresql.org/docs/9.3/interactive/catalog-pg-cast.html > > Many thank. > > -----Original Message----- > From: pgsql-general-owner@postgresql.org > [mailto:pgsql-general-owner@postgresql.org] On Behalf Of David G > Johnston > Sent: 09 December 2014 20:23 > To: pgsql-general@postgresql.org > Subject: Re: [GENERAL] List of shorthand casts > > FarjadFarid(ChkNet) wrote >> Is the list of shorthand casts documented somewhere? >> If so can you please direct me to it. A working URL would be great. > > Do you mean implicit casts - those that do not require an explicit > CAST(...) or "::" in the query? > > Can you give an example of one that you know exists? > > The catalog is probably the best way to get a definitive list though I > do not know the exact query you would use. The catalog tables are > fairly well documented so you should start there. > > David J. -- Adrian Klaver adrian.klaver@aklaver.com