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View takes forever to select from - did I miss the point?
Posted by: bingo wings
Date: November 19, 2010 04:30AM

Hello,

We have a complex set of tables that we want to create a view from to simplify using products such as Crystal reports that have minimal tools for crafting queries - so we want to aggregate a persons data into a single row in a view rather than spread across many tables.

The select for this view is large with 8 subselects that have left joins, and the main select having 11 left joins - its a very large set of data - 121k rows in the result set.
If I just run the select and limit to 1000 rows I can get the result in about 20 secs (this is only on a laptop with 8gb memory, x64 corei5 - not on our production machine) now I know that 121 x 20 = 40 mins (omg) but I was under the impression that once the view was built that selecting from it would be really quick - but in reality selecting a single row takes up to 20 mins.

have I totally missed the point of views here? Thew view seems to be recreating itself each tmie I select from it maybe? or do I need to make some config change?

I created the view by simply:

CREATE VIEW xyz AS SELECT ..........

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View takes forever to select from - did I miss the point?
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