should be it

external/duckdb/test/sql/function/array/array_distance.test

@@ -0,0 +1,43 @@
+# name: test/sql/function/array/array_distance.test
+# group: [array]
+
+foreach type FLOAT
+
+query I
+SELECT array_distance([1, 2, 3]::${type}[3], [1, 2, 3]::${type}[3]);
+----
+0.0
+
+statement ok
+CREATE OR REPLACE TABLE arrays (l ${type}[3]);
+
+statement ok
+INSERT INTO arrays VALUES ([1, 2, 3]), ([1, 2, 4]), ([7, 8, 9]), ([-1, -2, -3]), (NULL);
+
+query I
+SELECT array_distance(l, [1, 2, 3]::${type}[3]) FROM arrays;
+----
+0.0
+1.0
+10.392304
+7.483315
+NULL
+
+
+statement error
+SELECT array_distance([1, NULL, 3]::${type}[3], [1, 2, 3]::${type}[3]);
+----
+left argument can not contain NULL values
+
+statement error
+SELECT array_distance([1, 2, 3]::${type}[3], [1, NULL, 3]::${type}[3]);
+----
+right argument can not contain NULL values
+
+statement error
+SELECT array_distance([1, 2, 3]::${type}[3], [1, 2, 3, 4]::${type}[4]);
+----
+array_distance: Array arguments must be of the same size
+
+
+endloop