test: attempt to fix tests again

pkg/client/client_test.go

@@ -230,7 +230,7 @@ func test_Table(t *testing.T) {
 		"character_maximum_length",
 		"character_set_catalog",
 		"column_default",
-		"comment"
+		"comment",
 	}
 
 	assert.Equal(t, nil, err)

pkg/statements/sql.go

@@ -82,7 +82,7 @@ SELECT
   character_maximum_length,
   character_set_catalog,
   column_default,
-  pg_catalog.col_description(concat($1, '.', $2)::regclass::oid, ordinal_position) as comment
+  pg_catalog.col_description(($1::text || '.' || $2::text)::regclass::oid, ordinal_position) as comment
 FROM
   information_schema.columns
 WHERE