EC
3231
MySQLERRORNotableGIS / SpatialHIGH confidence

Unsupported argument type for spatial function

Production Risk

Low — query error; no data affected.

Why it happens
  1. 1Spatial function received a geometry type it does not support (e.g., passing a POINT to ST_Area).
  2. 2Geometry collection type incompatible with the called function.
How to reproduce
trigger — this will error
trigger — this will error
SELECT ST_Area(ST_GeomFromText('POINT(1 1)'));

expected output

ERROR 3231 (HY000): Unsupported argument type for spatial function.

Fix 1

Use the correct geometry type for the function

Use the correct geometry type for the function
SELECT ST_Area(ST_GeomFromText('POLYGON((0 0, 1 0, 1 1, 0 1, 0 0))'));

Why this works

ST_Area() requires a Polygon or MultiPolygon, not a Point.

Fix 2

Check function documentation for supported geometry types

Check function documentation for supported geometry types
-- Consult MySQL spatial function reference.

Why this works

Each spatial function specifies which geometry types it accepts.

What not to do

✕

Sources
Official documentation ↗

MySQL 8.0 — 3231 ER_GIS_UNSUPPORTED_ARGUMENT

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