Not implemented Error: Unsupported type for OGR: DECIMAL(#,#)

[rory-orennia]

Similar to #468 it seems like Decimals aren't being converted to be sent to the GDAL driver. Here's a minimal reproduction:

install spatial;
load spatial;
COPY (
  SELECT
      ST_Point(50, 50) AS "geometry",
      CAST(50 AS DECIMAL(9,6)) AS "longitude",
      CAST(50 AS DECIMAL(9,6)) AS "latitude",
) TO 'test.geojson' WITH (FORMAT GDAL, DRIVER 'GeoJSON', LAYER_NAME 'Testing Decimals')

Workaround: Casting it to a FLOAT works