Fix bulkcopy support for nullable civil types by returning proper driver.Value types

Co-authored-by: shueybubbles <[email protected]>

Author: Copilot

civil_null.go

@@ -39,7 +39,7 @@ func (n NullDate) Value() (driver.Value, error) {
 	if !n.Valid {
 		return nil, nil
 	}
-	return n.Date, nil
+	return n.Date.In(time.UTC), nil
 }
 
 // String returns the string representation of the date or "NULL".
@@ -107,7 +107,7 @@ func (n NullDateTime) Value() (driver.Value, error) {
 	if !n.Valid {
 		return nil, nil
 	}
-	return n.DateTime, nil
+	return n.DateTime.In(time.UTC), nil
 }
 
 // String returns the string representation of the datetime or "NULL".
@@ -175,7 +175,7 @@ func (n NullTime) Value() (driver.Value, error) {
 	if !n.Valid {
 		return nil, nil
 	}
-	return n.Time, nil
+	return time.Date(1, 1, 1, n.Time.Hour, n.Time.Minute, n.Time.Second, n.Time.Nanosecond, time.UTC), nil
 }
 
 // String returns the string representation of the time or "NULL".

civil_null_test.go

@@ -19,8 +19,9 @@ func TestNullDate(t *testing.T) {
 		if err != nil {
 			t.Errorf("Unexpected error: %v", err)
 		}
-		if val != date {
-			t.Errorf("Expected %v, got %v", date, val)
+		expectedTime := date.In(time.UTC)
+		if val != expectedTime {
+			t.Errorf("Expected %v, got %v", expectedTime, val)
 		}
 
 		// Invalid case
@@ -139,8 +140,9 @@ func TestNullDateTime(t *testing.T) {
 		if err != nil {
 			t.Errorf("Unexpected error: %v", err)
 		}
-		if val != dateTime {
-			t.Errorf("Expected %v, got %v", dateTime, val)
+		expectedTime := dateTime.In(time.UTC)
+		if val != expectedTime {
+			t.Errorf("Expected %v, got %v", expectedTime, val)
 		}
 
 		// Invalid case
@@ -203,8 +205,9 @@ func TestNullTime(t *testing.T) {
 		if err != nil {
 			t.Errorf("Unexpected error: %v", err)
 		}
-		if val != civilTime {
-			t.Errorf("Expected %v, got %v", civilTime, val)
+		expectedTime := time.Date(1, 1, 1, civilTime.Hour, civilTime.Minute, civilTime.Second, civilTime.Nanosecond, time.UTC)
+		if val != expectedTime {
+			t.Errorf("Expected %v, got %v", expectedTime, val)
 		}
 
 		// Invalid case

tvp_go19.go

@@ -109,7 +109,7 @@ func (tvp TVP) encode(schema, name string, columnStr []columnStruct, tvpFieldInd
 			if tvp.verifyStandardTypeOnNull(buf, tvpVal) {
 				continue
 			}
-			
+
 			// Extract inner value from nullable civil types when they are valid
 			switch v := tvpVal.(type) {
 			case NullDate:
@@ -125,7 +125,7 @@ func (tvp TVP) encode(schema, name string, columnStr []columnStruct, tvpFieldInd
 					tvpVal = v.Time
 				}
 			}
-			
+
 			valOf := reflect.ValueOf(tvpVal)
 			elemKind := field.Kind()
 			if elemKind == reflect.Ptr && valOf.IsNil() {