PG error type is *pgconn.PgError

pgconn.go

@@ -45,7 +45,7 @@ type PgError struct {
 	Routine          string
 }
 
-func (pe PgError) Error() string {
+func (pe *PgError) Error() string {
 	return pe.Severity + ": " + pe.Message + " (SQLSTATE " + pe.Code + ")"
 }
 
@@ -118,7 +118,7 @@ func ConnectConfig(ctx context.Context, config *Config) (pgConn *PgConn, err err
 		pgConn, err = connect(ctx, config, fc)
 		if err == nil {
 			return pgConn, nil
-		} else if err, ok := err.(PgError); ok {
+		} else if err, ok := err.(*PgError); ok {
 			return nil, err
 		}
 	}
@@ -199,7 +199,7 @@ func connect(ctx context.Context, config *Config, fallbackConfig *FallbackConfig
 			// handled by ReceiveMessage
 		case *pgproto3.ErrorResponse:
 			pgConn.NetConn.Close()
-			return nil, PgError{
+			return nil, &PgError{
 				Severity:         msg.Severity,
 				Code:             msg.Code,
 				Message:          msg.Message,
@@ -654,8 +654,8 @@ func (pgConn *PgConn) Exec(ctx context.Context, sql string) (*PgResult, error) {
 	return result, nil
 }
 
-func errorResponseToPgError(msg *pgproto3.ErrorResponse) PgError {
-	return PgError{
+func errorResponseToPgError(msg *pgproto3.ErrorResponse) *PgError {
+	return &PgError{
 		Severity:         msg.Severity,
 		Code:             msg.Code,
 		Message:          msg.Message,

pgconn_test.go

@@ -269,7 +269,7 @@ func TestConnExecMultipleQueriesError(t *testing.T) {
 	result, err := pgConn.Exec(context.Background(), "select 1; select 1/0; select 1")
 	require.NotNil(t, err)
 	require.Nil(t, result)
-	if pgErr, ok := err.(pgconn.PgError); ok {
+	if pgErr, ok := err.(*pgconn.PgError); ok {
 		assert.Equal(t, "22012", pgErr.Code)
 	} else {
 		t.Errorf("unexpected error: %v", err)
@@ -331,7 +331,7 @@ func TestConnCancelQuery(t *testing.T) {
 	require.Nil(t, err)
 
 	_, err = pgConn.GetResult(context.Background()).Close()
-	if err, ok := err.(pgconn.PgError); ok {
+	if err, ok := err.(*pgconn.PgError); ok {
 		assert.Equal(t, "57014", err.Code)
 	} else {
 		t.Errorf("expected pgconn.PgError got %v", err)