Re: [postgis-users] Generating new random points throughout an update

2023-11-18 Thread Regina Obe via postgis-users
Well when I run random() I do get a different answer for each run so random behaves as I would expect. I didn’t look that closely at your query with random. e.g. SELECT random() FROM generate_series(1,100); Even if within the same row, the random numbers are different: SELECT

Re: [postgis-users] Generating new random points throughout an update

2023-11-18 Thread Brent Wood via postgis-users
Thanks for your time & advice Regina, I appreciate it. I still can't get this to work as I think it should, so have included actual SQL's to show what I'm doing, using ST_GeneratePoints() this time... I create a db & add the postgis extension Then create the two tables to test, inserting 3

Re: [postgis-users] Generating new random points throughout an update

2023-11-18 Thread Brent Wood via postgis-users
Gotcha... I'm glad it didn't really make sense to you either. That is sort of what I thought might be happening. Nice to know I'm not a totally lost cause!!! That works perfectly, Thanks heaps!! On Sunday, November 19, 2023 at 11:09:34 AM GMT+13, Regina Obe wrote: I’m guessing

Re: [postgis-users] Generating new random points throughout an update

2023-11-18 Thread Regina Obe via postgis-users
I’m guessing the reason why your example doesn’t work is because the planner is doing some serious short-circuiting cause it sees two subselects that are using no variables from the updated table. I suspect this is a bug or some intentional stuff that makes no sense to me. Cause I’m pretty