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Re: List of shorthand casts

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Thanks. 

-----Original Message-----
From: Adrian Klaver [mailto:adrian.klaver@xxxxxxxxxxx] 
Sent: 09 December 2014 21:46
To: FarjadFarid(ChkNet); 'David G Johnston'; pgsql-general@xxxxxxxxxxxxxx
Subject: Re:  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@xxxxxxxxxxxxxx
> [mailto:pgsql-general-owner@xxxxxxxxxxxxxx] On Behalf Of David G 
> Johnston
> Sent: 09 December 2014 20:23
> To: pgsql-general@xxxxxxxxxxxxxx
> Subject: Re:  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@xxxxxxxxxxx



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