Re: can't cast varchar as integer?

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От Joel Burton
Тема Re: can't cast varchar as integer?
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Msg-id JGEPJNMCKODMDHGOBKDNIEEICOAA.joel@joelburton.com
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Ответ на can't cast varchar as integer?  (Scott Royston <scroyston@mac.com>)
Список pgsql-sql
> what's the reasoning behind not being able to cast a varchar as 
> integer?  this seems very weird to me:
> 
> LEDEV=# select cast(foo as integer) from test;
> ERROR:  Cannot cast type 'character varying' to 'integer'
> LEDEV=# select cast(bar as integer) from test;
>   bar
> -----
>   123
> (1 row)

Interesting. You can have an intermediate to-text cast:

select cast ( cast ( cast ('123' as varchar) as text) as integer);


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