On 12/6/21 11:02 AM, Alan Hodgson wrote:
On Mon, 2021-12-06 at 10:19 -0700, Rob Sargent wrote:
To be clear, is it the devs or the ORM that's adding the ORDER and the
LIMIT? I'm betting on devs. Do they need the smallest id (first
occurrance?) or do they need data common to all 5096 entries (Name?) and
any record will do?. For the former they might be better off asking for
just the attributes they need and for the latter you need to provide an
option which gets them that single record. Of course, If they have the
"smallest id" in hand they should request that.
That assumes I could figure what bit of ORM code is generating this, talk to them, and then get them to actually think about what data they're looking for and it's impact on the database. :/ Given my 25 year track record with devs, I'm thinking of that as plan B. Hopefully though if they're looking for something common to all the records they would look at the parent table instead.
I do expect the dev actually specified the order/limit for some reason.
Until you know what they're after it's hard to make the correct adjustment. Another index is more over-head and may not be necessary or even the best solution for getting that one tuple they're after.
Thank you for the suggestions.
Up thread you hoped for a general solution. The devs writing better queries is your best bet.
If you cannot or choose not to talk with the devs or at least their manager you'll be chasing these for a long time. Those dealing with ORM code are server-side: they are supposed to be the smart ones! Maybe they can be taught.
