MarshalJSON should be defined on T not *T

Otherwise "%v" format would be used by json.Marshal(T).

backend_key_data.go

@@ -38,7 +38,7 @@ func (src *BackendKeyData) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *BackendKeyData) MarshalJSON() ([]byte, error) {
+func (src BackendKeyData) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type      string
 		ProcessID uint32

bind.go

@@ -144,7 +144,7 @@ func (src *Bind) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Bind) MarshalJSON() ([]byte, error) {
+func (src Bind) MarshalJSON() ([]byte, error) {
 	formattedParameters := make([]map[string]string, len(src.Parameters))
 	for i, p := range src.Parameters {
 		if p == nil {

bind_complete.go

@@ -25,7 +25,7 @@ func (src *BindComplete) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *BindComplete) MarshalJSON() ([]byte, error) {
+func (src BindComplete) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

close.go

@@ -51,7 +51,7 @@ func (src *Close) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Close) MarshalJSON() ([]byte, error) {
+func (src Close) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type       string
 		ObjectType string

close_complete.go

@@ -25,7 +25,7 @@ func (src *CloseComplete) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CloseComplete) MarshalJSON() ([]byte, error) {
+func (src CloseComplete) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

command_complete.go

@@ -42,7 +42,7 @@ func (src *CommandComplete) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CommandComplete) MarshalJSON() ([]byte, error) {
+func (src CommandComplete) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type       string
 		CommandTag string

copy_both_response.go

@@ -59,7 +59,7 @@ func (src *CopyBothResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CopyBothResponse) MarshalJSON() ([]byte, error) {
+func (src CopyBothResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type              string
 		ColumnFormatCodes []uint16

copy_data.go

@@ -33,7 +33,7 @@ func (src *CopyData) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CopyData) MarshalJSON() ([]byte, error) {
+func (src CopyData) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 		Data string

copy_done.go

@@ -26,7 +26,7 @@ func (src *CopyDone) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CopyDone) MarshalJSON() ([]byte, error) {
+func (src CopyDone) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

copy_fail.go

@@ -42,7 +42,7 @@ func (src *CopyFail) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CopyFail) MarshalJSON() ([]byte, error) {
+func (src CopyFail) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type    string
 		Message string

copy_in_response.go

@@ -59,7 +59,7 @@ func (src *CopyInResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CopyInResponse) MarshalJSON() ([]byte, error) {
+func (src CopyInResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type              string
 		ColumnFormatCodes []uint16

copy_out_response.go

@@ -60,7 +60,7 @@ func (src *CopyOutResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *CopyOutResponse) MarshalJSON() ([]byte, error) {
+func (src CopyOutResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type              string
 		ColumnFormatCodes []uint16

data_row.go

@@ -85,7 +85,7 @@ func (src *DataRow) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *DataRow) MarshalJSON() ([]byte, error) {
+func (src DataRow) MarshalJSON() ([]byte, error) {
 	formattedValues := make([]map[string]string, len(src.Values))
 	for i, v := range src.Values {
 		if v == nil {

describe.go

@@ -51,7 +51,7 @@ func (src *Describe) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Describe) MarshalJSON() ([]byte, error) {
+func (src Describe) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type       string
 		ObjectType string

empty_query_response.go

@@ -25,7 +25,7 @@ func (src *EmptyQueryResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *EmptyQueryResponse) MarshalJSON() ([]byte, error) {
+func (src EmptyQueryResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

execute.go

@@ -52,7 +52,7 @@ func (src *Execute) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Execute) MarshalJSON() ([]byte, error) {
+func (src Execute) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type    string
 		Portal  string

flush.go

@@ -25,7 +25,7 @@ func (src *Flush) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Flush) MarshalJSON() ([]byte, error) {
+func (src Flush) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

function_call_response.go

@@ -57,7 +57,7 @@ func (src *FunctionCallResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *FunctionCallResponse) MarshalJSON() ([]byte, error) {
+func (src FunctionCallResponse) MarshalJSON() ([]byte, error) {
 	var formattedValue map[string]string
 	var hasNonPrintable bool
 	for _, b := range src.Result {

no_data.go

@@ -25,7 +25,7 @@ func (src *NoData) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *NoData) MarshalJSON() ([]byte, error) {
+func (src NoData) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

notification_response.go

@@ -57,7 +57,7 @@ func (src *NotificationResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *NotificationResponse) MarshalJSON() ([]byte, error) {
+func (src NotificationResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type    string
 		PID     uint32

parameter_description.go

@@ -55,7 +55,7 @@ func (src *ParameterDescription) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *ParameterDescription) MarshalJSON() ([]byte, error) {
+func (src ParameterDescription) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type          string
 		ParameterOIDs []uint32

parameter_status.go

@@ -53,7 +53,7 @@ func (src *ParameterStatus) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (ps *ParameterStatus) MarshalJSON() ([]byte, error) {
+func (ps ParameterStatus) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type  string
 		Name  string

parse.go

@@ -73,7 +73,7 @@ func (src *Parse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Parse) MarshalJSON() ([]byte, error) {
+func (src Parse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type          string
 		Name          string

parse_complete.go

@@ -25,7 +25,7 @@ func (src *ParseComplete) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *ParseComplete) MarshalJSON() ([]byte, error) {
+func (src ParseComplete) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

password_message.go

@@ -40,7 +40,7 @@ func (src *PasswordMessage) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *PasswordMessage) MarshalJSON() ([]byte, error) {
+func (src PasswordMessage) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type     string
 		Password string

portal_suspended.go

@@ -25,7 +25,7 @@ func (src *PortalSuspended) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *PortalSuspended) MarshalJSON() ([]byte, error) {
+func (src PortalSuspended) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

query.go

@@ -39,7 +39,7 @@ func (src *Query) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Query) MarshalJSON() ([]byte, error) {
+func (src Query) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type   string
 		String string

ready_for_query.go

@@ -29,7 +29,7 @@ func (src *ReadyForQuery) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *ReadyForQuery) MarshalJSON() ([]byte, error) {
+func (src ReadyForQuery) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type     string
 		TxStatus string

row_description.go

@@ -102,7 +102,7 @@ func (src *RowDescription) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *RowDescription) MarshalJSON() ([]byte, error) {
+func (src RowDescription) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type   string
 		Fields []FieldDescription

sasl_initial_response.go

@@ -56,7 +56,7 @@ func (src *SASLInitialResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *SASLInitialResponse) MarshalJSON() ([]byte, error) {
+func (src SASLInitialResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type          string
 		AuthMechanism string

sasl_response.go

@@ -32,7 +32,7 @@ func (src *SASLResponse) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *SASLResponse) MarshalJSON() ([]byte, error) {
+func (src SASLResponse) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 		Data string

startup_message.go

@@ -89,7 +89,7 @@ func (src *StartupMessage) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *StartupMessage) MarshalJSON() ([]byte, error) {
+func (src StartupMessage) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type            string
 		ProtocolVersion uint32

sync.go

@@ -25,7 +25,7 @@ func (src *Sync) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Sync) MarshalJSON() ([]byte, error) {
+func (src Sync) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{

terminate.go

@@ -25,7 +25,7 @@ func (src *Terminate) Encode(dst []byte) []byte {
 }
 
 // MarshalJSON implements encoding/json.Marshaler.
-func (src *Terminate) MarshalJSON() ([]byte, error) {
+func (src Terminate) MarshalJSON() ([]byte, error) {
 	return json.Marshal(struct {
 		Type string
 	}{