Re: [SQL] Query suddenly taking longer....

2003-08-14 Thread Tom Lane
Kurt Overberg <[EMAIL PROTECTED]> writes: > I have the following query on postgresql 7.3.2 on RedHat 7. > select *, (select count(*) from xrefmembergroup where membergroupid = > m.id) as numberingroup from membergroup m; > The xrefmembergroup table has about 120,000 rows, membergroup has 90. > T

Re: [SQL] Query suddenly taking longer....

2003-08-14 Thread Kurt Overberg
Tom, Thanks for the reply. I agree that the query seemed inefficient, but it ran so quickly I thought it was okay. The only difference between the two servers was that the fast one used an Index Scan while the other (the now-slow one) would use a sequential scan. The query as you re-wrote i

[SQL] Query suddenly taking longer....

2003-08-14 Thread Kurt Overberg
Hi all, I have the following query on postgresql 7.3.2 on RedHat 7. select *, (select count(*) from xrefmembergroup where membergroupid = m.id) as numberingroup from membergroup m; (basically- try to get a list of 'groups' and the number of members in each group) The xrefmembergroup table has abo