Fix null in structured types arrays regression (#1187)

* Reverted option check changes

* Change option enabled to pass context by pointer

* Performance improvement

---------

Co-authored-by: Dawid Heyman <dawid.heyman@snowflake.com>

structured_type.go

@@ -1150,25 +1150,31 @@ func (st *structuredType) fieldMetadataByFieldName(fieldName string) (fieldMetad
 	return fieldMetadata{}, errors.New("no metadata for field " + fieldName)
 }
 
-func optionEnabled(ctx context.Context, option contextKey) bool {
-	v := ctx.Value(option)
+func structuredTypesEnabled(ctx context.Context) bool {
+	v := ctx.Value(enableStructuredTypes)
 	if v == nil {
 		return false
 	}
 	d, ok := v.(bool)
 	return ok && d
 }
 
-func structuredTypesEnabled(ctx context.Context) bool {
-	return optionEnabled(ctx, enableStructuredTypes)
-}
-
 func mapValuesNullableEnabled(ctx context.Context) bool {
-	return optionEnabled(ctx, mapValuesNullable)
+	v := ctx.Value(mapValuesNullable)
+	if v == nil {
+		return false
+	}
+	d, ok := v.(bool)
+	return ok && d
 }
 
 func arrayValuesNullableEnabled(ctx context.Context) bool {
-	return optionEnabled(ctx, arrayValuesNullable)
+	v := ctx.Value(arrayValuesNullable)
+	if v == nil {
+		return false
+	}
+	d, ok := v.(bool)
+	return ok && d
 }
 
 func getSfFieldName(field reflect.StructField) string {

structured_type_read_test.go

@@ -1757,7 +1757,6 @@ func TestArraysWithNullValues(t *testing.T) {
 				} else {
 					assertDeepEqualE(t, tc.actual, tc.expected)
 				}
-				fmt.Printf("%v", reflect.TypeOf(tc.actual))
 			})
 		}
 	})