The intersect function does not utilize indexes

[Regina Obe]

You have an example query where you are seeing this behavior?

 

From: Dapeng Wang <wangdapeng20191008 at gmail.com> 
Sent: Thursday, February 22, 2024 8:57 PM
To: PostGIS Users Discussion <postgis-users at lists.osgeo.org>
Subject: The intersect function does not utilize indexes

 

Hello everyone,

 

I have a client with a database developed on PostgreSQL 12, with both Windows and Linux versions. Everything is normal with the Linux version, but there are anomalies with the Windows version.

While the Windows database can have the PostGIS extension installed, create indexes, and execute SQL queries correctly, spatial functions do not utilize indexes, such as intersection and containment.

Here's what I've investigated so far (using the same DDL):
On the Windows system, PostgreSQL 12 is installed along with PostGIS versions 3.3.0 to 3.4.1, and everything works fine. Spatial functions can utilize indexes.
On the Windows system, the client's developed database is installed with PostGIS versions 3.3.0 to 3.4.1. Queries using the && operator utilize indexes, but spatial functions (such as st_intersects and ST_Contains) do not utilize indexes.
Vacuum analyze has been performed, and I've attempted to disable sequential scans and force index scans, but to no avail.
Do you have any good suggestions?

 

Thanks,

Dapeng

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