diff --git a/CHANGELOG.md b/CHANGELOG.md
index 27c7d9df..f22d8d29 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,21 @@
+# 3.5.0 (June 29, 2019)
+
+## Features
+
+* Protocol support for PortalSuspended message (avivklas)
+* Read OIDs for composite types on connection init (Nick Jones)
+
+## Fixes
+
+* Hstore can have empty keys (Josh Leverette)
+* Fix -0 value for numeric type (David Hudson)
+* Log error message on rows-close error (Euan Kemp)
+
+## Changes
+
+* Explicitly cast binary string to bytea in simple protocol (jinhua luo)
+* Skip parse and sanitize simple query when no arguments (jinhua luo)
+
 # 3.4.0 (May 3, 2019)
 
 ## Features
diff --git a/README.md b/README.md
index d6499ba4..b7051f65 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,10 @@ if err != nil {
 }
 ```
 
+## v4 Coming Soon
+
+This is the current stable v3 version. v4 is currently is in prelease status. Consider using [v4](https://github.com/jackc/pgx/tree/v4) for new development or test upgrading existing applications.
+
 ## Features
 
 pgx supports many additional features beyond what is available through database/sql.
diff --git a/conn.go b/conn.go
index cb24748c..0cf6c167 100644
--- a/conn.go
+++ b/conn.go
@@ -404,9 +404,11 @@ func initPostgresql(c *Conn) (*pgtype.ConnInfo, error) {
 from pg_type t
 left join pg_type base_type on t.typelem=base_type.oid
 left join pg_namespace nsp on t.typnamespace=nsp.oid
+left join pg_class cls on t.typrelid=cls.oid
 where (
-	  t.typtype in('b', 'p', 'r', 'e')
+	  t.typtype in('b', 'p', 'r', 'e', 'c')
 	  and (base_type.oid is null or base_type.typtype in('b', 'p', 'r'))
+	  and (cls.oid is null or cls.relkind='c')
 	)`
 	)
 
diff --git a/internal/sanitize/sanitize.go b/internal/sanitize/sanitize.go
index 53543b89..8939d797 100644
--- a/internal/sanitize/sanitize.go
+++ b/internal/sanitize/sanitize.go
@@ -87,7 +87,7 @@ func QuoteString(str string) string {
 }
 
 func QuoteBytes(buf []byte) string {
-	return `'\x` + hex.EncodeToString(buf) + "'"
+	return `'\x` + hex.EncodeToString(buf) + "'::bytea"
 }
 
 type sqlLexer struct {
diff --git a/internal/sanitize/sanitize_test.go b/internal/sanitize/sanitize_test.go
index 9597840e..f4337253 100644
--- a/internal/sanitize/sanitize_test.go
+++ b/internal/sanitize/sanitize_test.go
@@ -108,7 +108,7 @@ func TestQuerySanitize(t *testing.T) {
 		{
 			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
 			args:     []interface{}{[]byte{0, 1, 2, 3, 255}},
-			expected: `select '\x00010203ff'`,
+			expected: `select '\x00010203ff'::bytea`,
 		},
 		{
 			query:    sanitize.Query{Parts: []sanitize.Part{"select ", 1}},
diff --git a/log/zapadapter/adapter.go b/log/zapadapter/adapter.go
index 82263b6e..a5a377e6 100644
--- a/log/zapadapter/adapter.go
+++ b/log/zapadapter/adapter.go
@@ -19,7 +19,7 @@ func (pl *Logger) Log(level pgx.LogLevel, msg string, data map[string]interface{
 	fields := make([]zapcore.Field, len(data))
 	i := 0
 	for k, v := range data {
-		fields[i] = zap.Reflect(k, v)
+		fields[i] = zap.Any(k, v)
 		i++
 	}
 
diff --git a/pgmock/pgmock.go b/pgmock/pgmock.go
index 4d15f7b8..d4ab0d13 100644
--- a/pgmock/pgmock.go
+++ b/pgmock/pgmock.go
@@ -211,9 +211,11 @@ func PgxInitSteps() []Step {
 from pg_type t
 left join pg_type base_type on t.typelem=base_type.oid
 left join pg_namespace nsp on t.typnamespace=nsp.oid
+left join pg_class cls on t.typrelid=cls.oid
 where (
-	  t.typtype in('b', 'p', 'r', 'e')
+	  t.typtype in('b', 'p', 'r', 'e', 'c')
 	  and (base_type.oid is null or base_type.typtype in('b', 'p', 'r'))
+	  and (cls.oid is null or cls.relkind='c')
 	)`,
 		}),
 		ExpectMessage(&pgproto3.Describe{
diff --git a/pgproto3/frontend.go b/pgproto3/frontend.go
index 4c05fcc3..be2c01cd 100644
--- a/pgproto3/frontend.go
+++ b/pgproto3/frontend.go
@@ -23,7 +23,7 @@ type Frontend struct {
 	copyInResponse       CopyInResponse
 	copyOutResponse      CopyOutResponse
 	copyDone             CopyDone
-        copyFail             CopyFail
+	copyFail             CopyFail
 	dataRow              DataRow
 	emptyQueryResponse   EmptyQueryResponse
 	errorResponse        ErrorResponse
@@ -36,6 +36,7 @@ type Frontend struct {
 	parseComplete        ParseComplete
 	readyForQuery        ReadyForQuery
 	rowDescription       RowDescription
+	portalSuspended      PortalSuspended
 
 	bodyLen    int
 	msgType    byte
@@ -76,8 +77,8 @@ func (b *Frontend) Receive() (BackendMessage, error) {
 		msg = &b.notificationResponse
 	case 'c':
 		msg = &b.copyDone
-        case 'f':
-                msg = &b.copyFail
+	case 'f':
+		msg = &b.copyFail
 	case 'C':
 		msg = &b.commandComplete
 	case 'd':
@@ -112,6 +113,8 @@ func (b *Frontend) Receive() (BackendMessage, error) {
 		msg = &b.copyBothResponse
 	case 'Z':
 		msg = &b.readyForQuery
+	case 's':
+		msg = &b.portalSuspended
 	default:
 		return nil, errors.Errorf("unknown message type: %c", b.msgType)
 	}
diff --git a/pgproto3/portal_suspended.go b/pgproto3/portal_suspended.go
new file mode 100644
index 00000000..dc81b027
--- /dev/null
+++ b/pgproto3/portal_suspended.go
@@ -0,0 +1,29 @@
+package pgproto3
+
+import (
+	"encoding/json"
+)
+
+type PortalSuspended struct{}
+
+func (*PortalSuspended) Backend() {}
+
+func (dst *PortalSuspended) Decode(src []byte) error {
+	if len(src) != 0 {
+		return &invalidMessageLenErr{messageType: "PortalSuspended", expectedLen: 0, actualLen: len(src)}
+	}
+
+	return nil
+}
+
+func (src *PortalSuspended) Encode(dst []byte) []byte {
+	return append(dst, 's', 0, 0, 0, 4)
+}
+
+func (src *PortalSuspended) MarshalJSON() ([]byte, error) {
+	return json.Marshal(struct {
+		Type string
+	}{
+		Type: "PortalSuspended",
+	})
+}
diff --git a/pgtype/numeric.go b/pgtype/numeric.go
index fb63df75..e14d02e4 100644
--- a/pgtype/numeric.go
+++ b/pgtype/numeric.go
@@ -321,7 +321,7 @@ func parseNumericString(str string) (n *big.Int, exp int32, err error) {
 	if len(parts) > 1 {
 		exp = int32(-len(parts[1]))
 	} else {
-		for len(digits) > 1 && digits[len(digits)-1] == '0' {
+		for len(digits) > 1 && digits[len(digits)-1] == '0' && digits[len(digits)-2] != '-' {
 			digits = digits[:len(digits)-1]
 			exp++
 		}
diff --git a/pgtype/numeric_array_test.go b/pgtype/numeric_array_test.go
index 22ee1bc4..28aa67d9 100644
--- a/pgtype/numeric_array_test.go
+++ b/pgtype/numeric_array_test.go
@@ -1,6 +1,7 @@
 package pgtype_test
 
 import (
+	"math"
 	"math/big"
 	"reflect"
 	"testing"
@@ -65,6 +66,13 @@ func TestNumericArraySet(t *testing.T) {
 				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
 				Status:     pgtype.Present},
 		},
+		{
+			source: []float32{float32(math.Copysign(0, -1))},
+			result: pgtype.NumericArray{
+				Elements:   []pgtype.Numeric{{Int: big.NewInt(0), Status: pgtype.Present}},
+				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
+				Status:     pgtype.Present},
+		},
 		{
 			source: []float64{1},
 			result: pgtype.NumericArray{
@@ -72,6 +80,13 @@ func TestNumericArraySet(t *testing.T) {
 				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
 				Status:     pgtype.Present},
 		},
+		{
+			source: []float64{math.Copysign(0, -1)},
+			result: pgtype.NumericArray{
+				Elements:   []pgtype.Numeric{{Int: big.NewInt(0), Status: pgtype.Present}},
+				Dimensions: []pgtype.ArrayDimension{{LowerBound: 1, Length: 1}},
+				Status:     pgtype.Present},
+		},
 		{
 			source: (([]float32)(nil)),
 			result: pgtype.NumericArray{Status: pgtype.Null},
diff --git a/pgtype/numeric_test.go b/pgtype/numeric_test.go
index 9d7d83d6..a5f70c9e 100644
--- a/pgtype/numeric_test.go
+++ b/pgtype/numeric_test.go
@@ -1,6 +1,7 @@
 package pgtype_test
 
 import (
+	"math"
 	"math/big"
 	"math/rand"
 	"reflect"
@@ -188,7 +189,9 @@ func TestNumericSet(t *testing.T) {
 		result *pgtype.Numeric
 	}{
 		{source: float32(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
+		{source: float32(math.Copysign(0, -1)), result: &pgtype.Numeric{Int: big.NewInt(0), Status: pgtype.Present}},
 		{source: float64(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
+		{source: float64(math.Copysign(0, -1)), result: &pgtype.Numeric{Int: big.NewInt(0), Status: pgtype.Present}},
 		{source: int8(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
 		{source: int16(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
 		{source: int32(1), result: &pgtype.Numeric{Int: big.NewInt(1), Status: pgtype.Present}},
diff --git a/query.go b/query.go
index 27969be9..5c6cbf7f 100644
--- a/query.go
+++ b/query.go
@@ -84,7 +84,7 @@ func (rows *Rows) Close() {
 			rows.conn.log(LogLevelInfo, "Query", map[string]interface{}{"sql": rows.sql, "args": logQueryArgs(rows.args), "time": endTime.Sub(rows.startTime), "rowCount": rows.rowCount})
 		}
 	} else if rows.conn.shouldLog(LogLevelError) {
-		rows.conn.log(LogLevelError, "Query", map[string]interface{}{"sql": rows.sql, "args": logQueryArgs(rows.args)})
+		rows.conn.log(LogLevelError, "Query", map[string]interface{}{"sql": rows.sql, "args": logQueryArgs(rows.args), "err": rows.err})
 	}
 
 	if rows.batch != nil && rows.err != nil {
@@ -522,6 +522,10 @@ func (c *Conn) readUntilRowDescription() ([]FieldDescription, error) {
 }
 
 func (c *Conn) sanitizeAndSendSimpleQuery(sql string, args ...interface{}) (err error) {
+	if len(args) == 0 {
+		return c.sendSimpleQuery(sql)
+	}
+
 	if c.RuntimeParams["standard_conforming_strings"] != "on" {
 		return errors.New("simple protocol queries must be run with standard_conforming_strings=on")
 	}