[SQL] force view column varchar(32) to varchar(128)

2010-11-19 Thread Emi Lu

Hello,

Is there a way to force the view column change from varhcar(32) to 
varchar(128)?


Example:
===
v1 (id varchar(32) ... )

There are more than 1000 other views depend on v1.

Instead of recreating all other 1000 views, is there a way postgresql 
8.3 can do/accept:


create or replace v1 AS

select id::varchar(128), ..

Thanks a lot!
--
Lu Ying


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Re: [SQL] force view column varchar(32) to varchar(128)

2010-11-19 Thread Andreas Kretschmer
Emi Lu  wrote:

> Hello,
>
> Is there a way to force the view column change from varhcar(32) to  
> varchar(128)?

No, you have to recreate the view ...


Andreas
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Re: [SQL] force view column varchar(32) to varchar(128)

2010-11-19 Thread Richard Broersma
On Fri, Nov 19, 2010 at 7:02 AM, Emi Lu  wrote:

> Is there a way to force the view column change from varhcar(32) to
> varchar(128)?

> Instead of recreating all other 1000 views, is there a way postgresql 8.3
> can do/accept:

Ouch!  That stinks. I feel your pain (well my pain came from just
changing about 15-20 views.  changing 1000 views would make me
cringe).  Its too bad you haven't or can't use a dimensionless varchar
for your id column (I assume this is your primary key).  This would
eliminate the need to re-dimension your varchar columns.

As I see it, you don't have an option.  PgAdmin can be a great help
here.  Open the create script and make the changes and save both.

The only other Option that I can see would be to dump the table and
view defintions. Modify these definitions with sed.  Apply the new
schema, and lastly, use an ETL software to push your data to the new
schema.


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Richard Broersma Jr.

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