Longitude and Latitude order with ST_X, and ST_Y on SRID 4326

Question

I have a MySQL 8.0.15 and I am experimenting with the geo-spatial location functions. I have applied SRID 4326 to the "loc" column.

Nothing in the docs other than the primitive Point() suggests the input as "x,y" or "long, lat" but if I run the following query:

INSERT INTO organization 
(loc, spots, name, phone, website, account_id, category_id) 
VALUES 
(
  ST_PointFromText("POINT(-113.532000 54.733000)", 4326), 
  10,
  "Baptiste",
  " ",
  null,
  null,
  null
); 

SQL Error (3617): Latitude -113.532000 is out of range in function st_pointfromtext. [It must be within -90 > +90]

Which makes perfect sense as there are no 113 degrees of latitude - but when I swap the lat/lon parameters - everything works! However when I query the lat/lon the results are backwards.

SELECT 
   *, 

    ST_Y(loc) as lat,   
    ST_X(loc) as lng 

FROM 
  organization;

What am I not understanding about how these functions and coordinates work?

Seems the POINT() actually accepts LAT, LON on input - but when querying one must remember that Y is latitude, and X is longitude???

TIA

Answer 1

Which makes perfect sense as there are no 113 degrees of latitude - but when I swap the lat/lon parameters - everything works! However when I query the lat/lon the results are backwards.

That's because MySQL and Microsoft do the absolutely insane thing of swapping the order in geographic representations because that's what the EPSG says. Oracle and PostGIS do not. There is no X/Y in MySQL Geographic Representation. With MySQL v8, they tried to fix this while maintaining total and utter insanity by introducing

• ST_Longitude()
• ST_Latitude()

For more information check out Does MySQL store point datatypes as LAT LNG or LNG LAT?