PostgreSQL 9.0.1
It seems that PostgreSQL doesn't understand the WITH construct when used in a
PERFORM query inside PL/pgSQL functions and code blocks:
Example:
do
$$begin
with A as (select 1 as foo)
perform foo from A;
end$$;
syntax error at or near "perform"
do
$$begin
with A as (select 1 as foo)
select foo from A;
end$$;
query has no destination for result data
The only workaround that I can think of is to use a dummy variable to capture
the query result. This has to be done even when the query doesn't have a result
(as when calling a function returning void).
do
$$declare
dummy record;
begin
with A as (select 1 as foo)
select foo into dummy from A;
end$$;
Dmitry Epstein | Developer
Allied Testing
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