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Re: Anonymous Code Blocks as Lambdas?

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: "David E(dot) Wheeler" <david(at)kineticode(dot)com>
Cc: Andrew Dunstan <andrew(at)dunslane(dot)net>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Anonymous Code Blocks as Lambdas?
Date: 2009-10-26 21:12:54
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
2009/10/26 David E. Wheeler <david(at)kineticode(dot)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

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