Re: Anonymous Code Blocks as Lambdas?

2009/10/26 David E. Wheeler <david@kineticode.com>:
> On Oct 26, 2009, at 1:16 PM, Pavel Stehule wrote:
>
>> I have a idea about migration of outer (psql) variables, and custom
>> shell variables.
>>
>> some like:
>>
>> psql --allow_custom_variables --table_name=mytable
>>
>> inside psql we should to use :table_name variable with  "mytable" as
>> content.
>>
>> then we can use syntax
>>
>> do (table_name varchar) $$
>> begin
>>  raise notice 'TABLENAME IS %', table_name;
>>  return;
>> end;
>> $$
>>
>> so with this mechanism we can to simply parametrise plpgsql "do"
>> scripts from outer environment.
>
> How is this different from psql :variables?

is is psql variables.

And why would a `DO` feature be
> tied directly to psql?
>

it should be light relation. 'DO' should be parametrised, and psql can
use own variables as 'DO' parameters.

> Confused,
>
> David
>