Hi Tom,
Self contained test case attached... When executing the query below in 9.1
beta 2 we are getting the error ERROR: JOIN qualification cannot refer to other
relations. The same query is executing fine in 8.4.2 and 9.0.
SELECT dbai.dim_base_agg_instr_key AS instr_key, dba.dim_base_key AS basekey,
dl.datamart_letter, dba.agg_number AS aggnum, dl.enabled, dba.dim_base_agg_key,
dbai.dim_base_name, dbai.dim_base_agg_name, dl.dim_base_agg_letter_key,
dl.agg_size
FROM dim_base_agg_instr_view dbai, dim_base_agg dba, dim_base_agg_letter dl
WHERE dba.dim_base_agg_key = dl.dim_base_agg_key AND dbai.dim_base_key =
dba.dim_base_key AND NOT (EXISTS ( SELECT 1
FROM dim_base_agg_instr_def dbaid
WHERE dbai.dim_base_agg_instr_key = dbaid.dim_base_agg_instr_key AND
NOT (EXISTS ( SELECT 1
FROM dim_base_agg_col dbac
WHERE dba.dim_base_agg_key = dbac.dim_base_agg_key AND
dbac.dim_col_key = dbaid.dim_col_key))));
I have tried to find the cause and found out that the dba table alias ( the
condition dba.dim_base_agg_key = dbac.dim_base_agg_key in bold and italic
above which is nested 2 levels ) in the subquery is not visible from the outer
query.
As already mentioned we are experiencing a backend crashes in 8.4.2, 9.0 and
are trying to use crash dump handler to generate the trace in 9.1 beta2. We
have so many views in our application which use select queries like above, so
we are looking for any workarounds...
Given below the self contained test case...
create table a(x int);
create table b(x int, y int);
create table c(x int, y int, z int);
This query fails with ERROR: JOIN qualification cannot refer to other relations
- select a.x from a, b where a.x = b.x and not exists ( select 1 from c where
b.y = c.y and not exists ( select 1 from c where a.x = c.x))
I suppose other environmental information is not needed here...
Thanks,
Bangar Raju
-----Original Message-----
From: Tom Lane [mailto:[email protected]]
Sent: Monday, June 20, 2011 11:30 AM
To: BangarRaju Vadapalli
Cc: [email protected]
Subject: Re: [GENERAL] Forward referencing of table aliases in subqueries does
not work in 9.1 beta2 ( works in 9.0 and 8.4.2 )
BangarRaju Vadapalli <[email protected]> writes:
> The select query for creating the view is executing fine in 8.4.2. But
> not in 9.1 beta2. The issue is forward referencing of table aliases in
> subqueries is not working fine in 9.1 beta2.
This complaint is unintelligible. Please provide a self-contained
test case.
regards, tom lane
