Skip to content

ST_* functions and indexing #175

Open
@alechko

Description

@alechko

Apologies in advance if that's not the place to ask, but I'm just trying to have a better understanding MySQL (8.0) spatial features, specifically indexing of POINT column types and using the provided eloquent scope methods to trigger the index.

In a test project that I've setup according to the README of this package, I've seeded ~200k records with an indexed point column and I'm trying to have an eloquent pagination on results served by Response::json:

The JSON response returns a total value, which is re-calculated with every request and is kinda slow.

The slow query is 500+ ms and looks like this:

select count(*) as aggregate from `table` where st_distance_sphere(`location`, ST_GeomFromText('POINT(-1 1)')) <= 100000

If I add an order to this query, the query time doubles.

After doing a bit of manual queries, I got to the point that I've noticed that many of the ST_* methods does not utilize the column index, I tried using st_distance, st_distance_sphere, st_within, etc., all give results around 500 ms - 1 sec, and it doubles with ordering.

Is there a way to optimize these queries to use the index? Is there a "best practices" guide or something I can take a look at?

Thank you.

Metadata

Metadata

Assignees

No one assigned

    Labels

    No labels
    No labels

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions