diff --git a/mason-mariadb/src/connection/establish.rs b/mason-mariadb/src/connection/establish.rs
index 8ab0cf14..502407bc 100644
--- a/mason-mariadb/src/connection/establish.rs
+++ b/mason-mariadb/src/connection/establish.rs
@@ -11,7 +11,7 @@ pub async fn establish<'a, 'b: 'a>(
     conn: &'a mut Connection,
     _options: ConnectOptions<'b>,
 ) -> Result<(), Error> {
-    let init_packet = InitialHandshakePacket::deserialize(&conn.stream.next_bytes().await?)?;
+    let init_packet = InitialHandshakePacket::deserialize(&conn.stream.next_bytes().await?, None)?;
 
     conn.capabilities = init_packet.capabilities;
 
diff --git a/mason-mariadb/src/connection/mod.rs b/mason-mariadb/src/connection/mod.rs
index 6695799c..a014e772 100644
--- a/mason-mariadb/src/connection/mod.rs
+++ b/mason-mariadb/src/connection/mod.rs
@@ -92,7 +92,7 @@ impl Connection {
         self.send(ComPing()).await?;
 
         // Ping response must be an OkPacket
-        OkPacket::deserialize(&self.stream.next_bytes().await?)?;
+        OkPacket::deserialize(&self.stream.next_bytes().await?, None)?;
 
         Ok(())
     }
diff --git a/mason-mariadb/src/protocol/decode.rs b/mason-mariadb/src/protocol/decode.rs
index 36c802f2..da53c406 100644
--- a/mason-mariadb/src/protocol/decode.rs
+++ b/mason-mariadb/src/protocol/decode.rs
@@ -3,142 +3,157 @@ use byteorder::{ByteOrder, LittleEndian};
 use bytes::Bytes;
 use failure::{err_msg, Error};
 
-//pub struct Decoder<'a> {
-//    pub buf: &'a Bytes,
-//    pub index: usize,
-//}
-
-#[inline]
-pub fn decode_length(buf: &Bytes, index: &mut usize) -> Result<u32, Error> {
-    let length = decode_int_3(&buf, index);
-
-    if buf.len() < length as usize {
-        return Err(err_msg("Lengths to do not match"));
-    }
-
-    Ok(length)
+pub struct Decoder<'a> {
+    pub buf: &'a Bytes,
+    pub index: usize,
 }
 
-#[inline]
-pub fn decode_int_lenenc(buf: &Bytes, index: &mut usize) -> Option<usize> {
-    match buf[*index] {
-        0xFB => {
-            *index += 1;
-            None
+impl<'a> Decoder<'a> {
+    pub fn new(buf: &'a Bytes) -> Self {
+        Decoder {
+            buf,
+            index: 0,
         }
-        0xFC => {
-            let value = Some(LittleEndian::read_u16(&buf[*index + 1..]) as usize);
-            *index += 3;
-            value
+    }
+
+    #[inline]
+    pub fn decode_length(&mut self) -> Result<u32, Error> {
+        let length = self.decode_int_3();
+
+        if self.buf.len() < length as usize {
+            return Err(err_msg("Lengths to do not match"));
         }
-        0xFD => {
-            let value = Some(LittleEndian::read_u24(&buf[*index + 1..]) as usize);
-            *index += 4;
-            value
+
+        Ok(length)
+    }
+
+    pub fn skip_bytes(&mut self, amount: usize) {
+        self.index += amount;
+    }
+
+    #[inline]
+    pub fn decode_int_lenenc(&mut self) -> Option<usize> {
+        match self.buf[self.index] {
+            0xFB => {
+                self.index += 1;
+                None
+            }
+            0xFC => {
+                let value = Some(LittleEndian::read_u16(&self.buf[self.index + 1..]) as usize);
+                self.index += 3;
+                value
+            }
+            0xFD => {
+                let value = Some(LittleEndian::read_u24(&self.buf[self.index + 1..]) as usize);
+                self.index += 4;
+                value
+            }
+            0xFE => {
+                let value = Some(LittleEndian::read_u64(&self.buf[self.index + 1..]) as usize);
+                self.index += 9;
+                value
+            }
+            0xFF => panic!("int<lenenc> unprocessable first byte 0xFF"),
+            _ => {
+                let value = Some(self.buf[self.index] as usize);
+                self.index += 1;
+                value
+            }
         }
-        0xFE => {
-            let value = Some(LittleEndian::read_u64(&buf[*index + 1..]) as usize);
-            *index += 9;
-            value
-        }
-        0xFF => panic!("int<lenenc> unprocessable first byte 0xFF"),
-        _ => {
-            let value = Some(buf[*index] as usize);
-            *index += 1;
-            value
+    }
+
+    #[inline]
+    pub fn decode_int_8(&mut self) -> u64 {
+        let value = LittleEndian::read_u64(&self.buf[self.index..]);
+        self.index += 8;
+        value
+    }
+
+    #[inline]
+    pub fn decode_int_4(&mut self) -> u32 {
+        let value = LittleEndian::read_u32(&self.buf[self.index..]);
+        self.index += 4;
+        value
+    }
+
+    #[inline]
+    pub fn decode_int_3(&mut self) -> u32 {
+        let value = LittleEndian::read_u24(&self.buf[self.index..]);
+        self.index += 3;
+        value
+    }
+
+    #[inline]
+    pub fn decode_int_2(&mut self) -> u16 {
+        let value = LittleEndian::read_u16(&self.buf[self.index..]);
+        self.index += 2;
+        value
+    }
+
+    #[inline]
+    pub fn decode_int_1(&mut self) -> u8 {
+        let value = self.buf[self.index];
+        self.index += 1;
+        value
+    }
+
+    #[inline]
+    pub fn decode_string_lenenc(&mut self) -> Bytes {
+        let length = self.decode_int_3();
+        let value = Bytes::from(&self.buf[self.index..self.index + length as usize]);
+        self.index = self.index + length as usize;
+        value
+    }
+
+    #[inline]
+    pub fn decode_string_fix(&mut self, length: u32) -> Bytes {
+        let value = Bytes::from(&self.buf[self.index..self.index + length as usize]);
+        self.index = self.index + length as usize;
+        value
+    }
+
+    #[inline]
+    pub fn decode_string_eof(&mut self) -> Bytes {
+        let value = Bytes::from(&self.buf[self.index..]);
+        self.index = self.buf.len();
+        value
+    }
+
+    #[inline]
+    pub fn decode_string_null(&mut self) -> Result<Bytes, Error> {
+        if let Some(null_index) = memchr::memchr(0, &self.buf[self.index..]) {
+            let value = Bytes::from(&self.buf[self.index..self.index + null_index]);
+            self.index = self.index + null_index + 1;
+            Ok(value)
+        } else {
+            Err(err_msg("Null index no found"))
         }
     }
+
+    #[inline]
+    pub fn decode_byte_fix(&mut self, length: u32) -> Bytes {
+        let value = Bytes::from(&self.buf[self.index..self.index + length as usize]);
+        self.index = self.index + length as usize;
+        value
+    }
+
+    #[inline]
+    pub fn decode_byte_lenenc(&mut self) -> Bytes {
+        let length = self.decode_int_3();
+        let value = Bytes::from(&self.buf[self.index..self.index + length as usize]);
+        self.index = self.index + length as usize;
+        value
+    }
+
+    #[inline]
+    pub fn decode_byte_eof(&mut self) -> Bytes {
+        let value = Bytes::from(&self.buf[self.index..]);
+        self.index = self.buf.len();
+        value
+    }
 }
 
-#[inline]
-pub fn decode_int_8(buf: &Bytes, index: &mut usize) -> u64 {
-    let value = LittleEndian::read_u64(&buf[*index..]);
-    *index += 8;
-    value
-}
 
-#[inline]
-pub fn decode_int_4(buf: &Bytes, index: &mut usize) -> u32 {
-    let value = LittleEndian::read_u32(&buf[*index..]);
-    *index += 4;
-    value
-}
-
-#[inline]
-pub fn decode_int_3(buf: &Bytes, index: &mut usize) -> u32 {
-    let value = LittleEndian::read_u24(&buf[*index..]);
-    *index += 3;
-    value
-}
-
-#[inline]
-pub fn decode_int_2(buf: &Bytes, index: &mut usize) -> u16 {
-    let value = LittleEndian::read_u16(&buf[*index..]);
-    *index += 2;
-    value
-}
-
-#[inline]
-pub fn decode_int_1(buf: &Bytes, index: &mut usize) -> u8 {
-    let value = buf[*index];
-    *index += 1;
-    value
-}
-
-#[inline]
-pub fn decode_string_lenenc(buf: &Bytes, index: &mut usize) -> Bytes {
-    let length = decode_int_3(&buf, &mut *index);
-    let value = Bytes::from(&buf[*index..*index + length as usize]);
-    *index = *index + length as usize;
-    value
-}
-
-#[inline]
-pub fn decode_string_fix(buf: &Bytes, index: &mut usize, length: usize) -> Bytes {
-    let value = Bytes::from(&buf[*index..*index + length as usize]);
-    *index = *index + length as usize;
-    value
-}
-
-#[inline]
-pub fn decode_string_eof(buf: &Bytes, index: &mut usize) -> Bytes {
-    let value = Bytes::from(&buf[*index..]);
-    *index = buf.len();
-    value
-}
-
-#[inline]
-pub fn decode_string_null(buf: &Bytes, index: &mut usize) -> Result<Bytes, Error> {
-    if let Some(null_index) = memchr::memchr(0, &buf[*index..]) {
-        let value = Bytes::from(&buf[*index..*index + null_index]);
-        *index = *index + null_index + 1;
-        Ok(value)
-    } else {
-        Err(err_msg("Null index no found"))
-    }
-}
-
-#[inline]
-pub fn decode_byte_fix(buf: &Bytes, index: &mut usize, length: usize) -> Bytes {
-    let value = Bytes::from(&buf[*index..*index + length as usize]);
-    *index = *index + length as usize;
-    value
-}
-
-#[inline]
-pub fn decode_byte_lenenc(buf: &Bytes, index: &mut usize) -> Bytes {
-    let length = decode_int_3(&buf, &mut *index);
-    let value = Bytes::from(&buf[*index..*index + length as usize]);
-    *index = *index + length as usize;
-    value
-}
-
-#[inline]
-pub fn decode_byte_eof(buf: &Bytes, index: &mut usize) -> Bytes {
-    let value = Bytes::from(&buf[*index..]);
-    *index = buf.len();
-    value
-}
 
 #[cfg(test)]
 mod tests {
@@ -146,24 +161,23 @@ mod tests {
     use bytes::{Bytes, BytesMut};
     use failure::Error;
 
-    // [X] deserialize_int_lenenc
-    // [X] deserialize_int_8
-    // [X] deserialize_int_4
-    // [X] deserialize_int_3
-    // [X] deserialize_int_2
-    // [X] deserialize_int_1
-    // [X] deserialize_string_lenenc
-    // [X] deserialize_string_fix
-    // [X] deserialize_string_eof
-    // [X] deserialize_string_null
-    // [X] deserialize_byte_lenenc
-    // [X] deserialize_byte_eof
+    // [X] it_decodes_int_lenenc
+    // [X] it_decodes_int_8
+    // [X] it_decodes_int_4
+    // [X] it_decodes_int_3
+    // [X] it_decodes_int_2
+    // [X] it_decodes_int_1
+    // [X] it_decodes_string_lenenc
+    // [X] it_decodes_string_fix
+    // [X] it_decodes_string_eof
+    // [X] it_decodes_string_null
+    // [X] it_decodes_byte_lenenc
+    // [X] it_decodes_byte_eof
 
     #[test]
     fn it_decodes_int_lenenc_0x_fb() {
-        let buf: BytesMut = BytesMut::from(b"\xFB".to_vec());
-        let mut index = 0;
-        let int: Option<usize> = decode_int_lenenc(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\xFB".to_vec()).freeze());
+        let int: Option<usize> = decoder.decode_int_lenenc();
 
         assert_eq!(int, None);
         assert_eq!(index, 1);
@@ -171,9 +185,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_lenenc_0x_fc() {
-        let buf = BytesMut::from(b"\xFC\x01\x01".to_vec());
-        let mut index = 0;
-        let int: Option<usize> = decode_int_lenenc(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\xFC\x01\x01".to_vec()).freeze());
+        let int: Option<usize> = decoder.decode_int_lenenc();
 
         assert_eq!(int, Some(257));
         assert_eq!(index, 3);
@@ -181,9 +194,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_lenenc_0x_fd() {
-        let buf = BytesMut::from(b"\xFD\x01\x01\x01".to_vec());
-        let mut index = 0;
-        let int: Option<usize> = decode_int_lenenc(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\xFD\x01\x01\x01".to_vec()).freeze());
+        let int: Option<usize> = decoder.decode_int_lenenc();
 
         assert_eq!(int, Some(65793));
         assert_eq!(index, 4);
@@ -191,9 +203,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_lenenc_0x_fe() {
-        let buf = BytesMut::from(b"\xFE\x01\x01\x01\x01\x01\x01\x01\x01".to_vec());
-        let mut index = 0;
-        let int: Option<usize> = decode_int_lenenc(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\xFE\x01\x01\x01\x01\x01\x01\x01\x01".to_vec()).freeze());
+        let int: Option<usize> = decoder.decode_int_lenenc();
 
         assert_eq!(int, Some(72340172838076673));
         assert_eq!(index, 9);
@@ -201,9 +212,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_lenenc_0x_fa() {
-        let buf = BytesMut::from(b"\xFA".to_vec());
-        let mut index = 0;
-        let int: Option<usize> = decode_int_lenenc(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\xFA".to_vec()).freeze());
+        let int: Option<usize> = decoder.decode_int_lenenc();
 
         assert_eq!(int, Some(0xfA));
         assert_eq!(index, 1);
@@ -211,9 +221,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_8() {
-        let buf = BytesMut::from(b"\x01\x01\x01\x01\x01\x01\x01\x01".to_vec());
-        let mut index = 0;
-        let int: u64 = decode_int_8(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01\x01\x01\x01\x01\x01\x01\x01".to_vec()).freeze());
+        let int: u64 = decoder.decode_int_8();
 
         assert_eq!(int, 72340172838076673);
         assert_eq!(index, 8);
@@ -221,9 +230,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_4() {
-        let buf = BytesMut::from(b"\x01\x01\x01\x01".to_vec());
-        let mut index = 0;
-        let int: u32 = decode_int_4(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01\x01\x01\x01".to_vec()).freeze());
+        let int: u32 = decoder.decode_int_4();
 
         assert_eq!(int, 16843009);
         assert_eq!(index, 4);
@@ -231,9 +239,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_3() {
-        let buf = BytesMut::from(b"\x01\x01\x01".to_vec());
-        let mut index = 0;
-        let int: u32 = decode_int_3(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01\x01\x01".to_vec()).freeze());
+        let int: u32 = decoder.decode_int_3();
 
         assert_eq!(int, 65793);
         assert_eq!(index, 3);
@@ -241,9 +248,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_2() {
-        let buf = BytesMut::from(b"\x01\x01".to_vec());
-        let mut index = 0;
-        let int: u16 = decode_int_2(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01\x01".to_vec()).freeze());
+        let int: u16 = decoder.decode_int_2();
 
         assert_eq!(int, 257);
         assert_eq!(index, 2);
@@ -251,9 +257,8 @@ mod tests {
 
     #[test]
     fn it_decodes_int_1() {
-        let buf = BytesMut::from(b"\x01".to_vec());
-        let mut index = 0;
-        let int: u8 = decode_int_1(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01".to_vec()).freeze());
+        let int: u8 = decoder.decode_int_1();
 
         assert_eq!(int, 1);
         assert_eq!(index, 1);
@@ -261,9 +266,8 @@ mod tests {
 
     #[test]
     fn it_decodes_string_lenenc() {
-        let buf = BytesMut::from(b"\x01\x00\x00\x01".to_vec());
-        let mut index = 0;
-        let string: Bytes = decode_string_lenenc(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01\x00\x00\x01".to_vec()).freeze());
+        let string: Bytes = decoder.decode_string_lenenc();
 
         assert_eq!(string[0], b'\x01');
         assert_eq!(string.len(), 1);
@@ -272,9 +276,8 @@ mod tests {
 
     #[test]
     fn it_decodes_string_fix() {
-        let buf = BytesMut::from(b"\x01".to_vec());
-        let mut index = 0;
-        let string: Bytes = decode_string_fix(&buf.freeze(), &mut index, 1);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01".to_vec()).freeze());
+        let string: Bytes = decoder.decode_string_fix(1);
 
         assert_eq!(string[0], b'\x01');
         assert_eq!(string.len(), 1);
@@ -283,9 +286,8 @@ mod tests {
 
     #[test]
     fn it_decodes_string_eof() {
-        let buf = BytesMut::from(b"\x01".to_vec());
-        let mut index = 0;
-        let string: Bytes = decode_string_eof(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01".to_vec()).freeze());
+        let string: Bytes = decoder.decode_string_eof();
 
         assert_eq!(string[0], b'\x01');
         assert_eq!(string.len(), 1);
@@ -294,9 +296,8 @@ mod tests {
 
     #[test]
     fn it_decodes_string_null() -> Result<(), Error> {
-        let buf = BytesMut::from(b"random\x00\x01".to_vec());
-        let mut index = 0;
-        let string: Bytes = decode_string_null(&buf.freeze(), &mut index)?;
+        let mut decoder = Decoder::new(&BytesMut::from(b"random\x00\x01".to_vec()).freeze());
+        let string: Bytes = decoder.decode_string_null()?;
 
         assert_eq!(&string[..], b"random");
 
@@ -309,9 +310,8 @@ mod tests {
 
     #[test]
     fn it_decodes_byte_fix() {
-        let buf = BytesMut::from(b"\x01".to_vec());
-        let mut index = 0;
-        let string: Bytes = decode_byte_fix(&buf.freeze(), &mut index, 1);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01".to_vec()).freeze());
+        let string: Bytes = decoder.decode_byte_fix(1);
 
         assert_eq!(string[0], b'\x01');
         assert_eq!(string.len(), 1);
@@ -320,9 +320,8 @@ mod tests {
 
     #[test]
     fn it_decodes_byte_eof() {
-        let buf = BytesMut::from(b"\x01".to_vec());
-        let mut index = 0;
-        let string: Bytes = decode_byte_eof(&buf.freeze(), &mut index);
+        let mut decoder = Decoder::new(&BytesMut::from(b"\x01".to_vec()).freeze());
+        let string: Bytes = decoder.decode_byte_eof();
 
         assert_eq!(string[0], b'\x01');
         assert_eq!(string.len(), 1);
diff --git a/mason-mariadb/src/protocol/server.rs b/mason-mariadb/src/protocol/server.rs
index 64497c63..9c13af91 100644
--- a/mason-mariadb/src/protocol/server.rs
+++ b/mason-mariadb/src/protocol/server.rs
@@ -7,7 +7,7 @@ use failure::{err_msg, Error};
 use std::convert::TryFrom;
 
 pub trait Deserialize: Sized {
-    fn deserialize(buf: &Bytes) -> Result<Self, Error>;
+    fn deserialize<'a: 'b, 'b>(buf: &Bytes, decoder: Option<&mut Decoder>) -> Result<Self, Error>;
 }
 
 #[derive(Debug)]
@@ -141,6 +141,12 @@ impl Default for ServerStatusFlag {
     }
 }
 
+impl Default for FieldDetailFlag {
+    fn default() -> Self {
+        FieldDetailFlag::NOT_NULL
+    }
+}
+
 impl Default for FieldType {
     fn default() -> Self {
         FieldType::MysqlTypeDecimal
@@ -197,6 +203,7 @@ pub struct ColumnPacket {
     pub columns: Option<usize>,
 }
 
+#[derive(Debug, Default)]
 pub struct ColumnDefPacket {
     pub length: u32,
     pub seq_no: u8,
@@ -236,74 +243,73 @@ impl Message {
         let tag = buf[4];
 
         Ok(Some(match tag {
-            0xFF => Message::ErrPacket(ErrPacket::deserialize(&buf)?),
-            0x00 | 0xFE => Message::OkPacket(OkPacket::deserialize(&buf)?),
+            0xFF => Message::ErrPacket(ErrPacket::deserialize(&buf, None)?),
+            0x00 | 0xFE => Message::OkPacket(OkPacket::deserialize(&buf, None)?),
             _ => unimplemented!(),
         }))
     }
 }
 
 impl Deserialize for InitialHandshakePacket {
-    fn deserialize(buf: &Bytes) -> Result<Self, Error> {
-        let mut index = 0;
-
-        let length = decode_length(&buf, &mut index)?;
-        let seq_no = decode_int_1(&buf, &mut index);
+    fn deserialize<'a: 'b, 'b>(buf: &'a Bytes, decoder: Option<&mut Decoder<'b>>) -> Result<Self, Error> {
+        let mut decoder: &mut Decoder = decoder.unwrap_or(&mut Decoder::new(&buf));
+        let length = decoder.decode_length()?;
+        let seq_no = decoder.decode_int_1();
 
         if seq_no != 0 {
-            return Err(err_msg("Squence Number of Initial Handshake Packet is not 0"));
+            return Err(err_msg("Sequence Number of Initial Handshake Packet is not 0"));
         }
 
-        let protocol_version = decode_int_1(&buf, &mut index);
-        let server_version = decode_string_null(&buf, &mut index)?;
-        let connection_id = decode_int_4(&buf, &mut index);
-        let auth_seed = decode_string_fix(&buf, &mut index, 8);
+        let protocol_version = decoder.decode_int_1();
+        let server_version = decoder.decode_string_null()?;
+        let connection_id = decoder.decode_int_4();
+        let auth_seed = decoder.decode_string_fix(8);
 
         // Skip reserved byte
-        index += 1;
+        decoder.skip_bytes(1);
 
         let mut capabilities =
-            Capabilities::from_bits_truncate(decode_int_2(&buf, &mut index).into());
+            Capabilities::from_bits_truncate(decoder.decode_int_2().into());
 
-        let collation = decode_int_1(&buf, &mut index);
+        let collation = decoder.decode_int_1();
         let status =
-            ServerStatusFlag::from_bits_truncate(decode_int_2(&buf, &mut index).into());
+            ServerStatusFlag::from_bits_truncate(decoder.decode_int_2().into());
 
         capabilities |= Capabilities::from_bits_truncate(
-            ((decode_int_2(&buf, &mut index) as u32) << 16).into(),
+            ((decoder.decode_int_2() as u32) << 16).into(),
         );
 
         let mut plugin_data_length = 0;
         if !(capabilities & Capabilities::PLUGIN_AUTH).is_empty() {
-            plugin_data_length = decode_int_1(&buf, &mut index);
+            plugin_data_length = decoder.decode_int_1();
         } else {
             // Skip reserve byte
-            index += 1;
+            decoder.skip_bytes(1);
         }
 
         // Skip filler
-        index += 6;
+        decoder.skip_bytes(6);
 
         if (capabilities & Capabilities::CLIENT_MYSQL).is_empty() {
             capabilities |= Capabilities::from_bits_truncate(
-                ((decode_int_4(&buf, &mut index) as u128) << 32).into(),
+                ((decoder.decode_int_4() as u128) << 32).into(),
             );
         } else {
             // Skip filler
-            index += 4;
+            decoder.skip_bytes(4);
         }
 
         let mut scramble: Option<Bytes> = None;
         if !(capabilities & Capabilities::SECURE_CONNECTION).is_empty() {
             let len = std::cmp::max(12, plugin_data_length as usize - 9);
-            scramble = Some(decode_string_fix(&buf, &mut index, len));
+            scramble = Some(decoder.decode_string_fix(len as u32));
             // Skip reserve byte
-            index += 1;
+            decoder.skip_bytes(1);
         }
 
         let mut auth_plugin_name: Option<Bytes> = None;
         if !(capabilities & Capabilities::PLUGIN_AUTH).is_empty() {
-            auth_plugin_name = Some(decode_string_null(&buf, &mut index)?);
+            auth_plugin_name = Some(decoder.decode_string_null()?);
         }
 
         Ok(InitialHandshakePacket {
@@ -324,30 +330,30 @@ impl Deserialize for InitialHandshakePacket {
 }
 
 impl Deserialize for OkPacket {
-    fn deserialize(buf: &Bytes) -> Result<Self, Error> {
-        let mut index = 0;
+    fn deserialize(buf: &Bytes, decoder: Option<&mut Decoder>) -> Result<Self, Error> {
+        let mut decoder = decoder.unwrap_or(&mut Decoder::new(&buf));
 
         // Packet header
-        let length = decode_length(&buf, &mut index)?;
-        let seq_no = decode_int_1(&buf, &mut index);
+        let length = decoder.decode_length()?;
+        let seq_no = decoder.decode_int_1();
 
         // Packet body
-        let packet_header = decode_int_1(&buf, &mut index);
+        let packet_header = decoder.decode_int_1();
         if packet_header != 0 && packet_header != 0xFE {
             panic!("Packet header is not 0 or 0xFE for OkPacket");
         }
 
-        let affected_rows = decode_int_lenenc(&buf, &mut index);
-        let last_insert_id = decode_int_lenenc(&buf, &mut index);
+        let affected_rows = decoder.decode_int_lenenc();
+        let last_insert_id = decoder.decode_int_lenenc();
         let server_status =
-            ServerStatusFlag::from_bits_truncate(decode_int_2(&buf, &mut index).into());
-        let warning_count = decode_int_2(&buf, &mut index);
+            ServerStatusFlag::from_bits_truncate(decoder.decode_int_2().into());
+        let warning_count = decoder.decode_int_2();
 
         // Assuming CLIENT_SESSION_TRACK is unsupported
         let session_state_info = None;
         let value = None;
 
-        let info = Bytes::from(&buf[index..]);
+        let info = decoder.decode_byte_eof();
 
         Ok(OkPacket {
             length,
@@ -364,18 +370,18 @@ impl Deserialize for OkPacket {
 }
 
 impl Deserialize for ErrPacket {
-    fn deserialize(buf: &Bytes) -> Result<Self, Error> {
-        let mut index = 0;
+    fn deserialize(buf: &Bytes, decoder: Option<&mut Decoder>) -> Result<Self, Error> {
+        let mut decoder = decoder.unwrap_or(&mut Decoder::new(&buf));
 
-        let length = decode_length(&buf, &mut index)?;
-        let seq_no = decode_int_1(&buf, &mut index);
+        let length = decoder.decode_length()?;
+        let seq_no = decoder.decode_int_1();
 
-        let packet_header = decode_int_1(&buf, &mut index);
+        let packet_header = decoder.decode_int_1();
         if packet_header != 0xFF {
             panic!("Packet header is not 0xFF for ErrPacket");
         }
 
-        let error_code = ErrorCode::try_from(decode_int_2(&buf, &mut index))?;
+        let error_code = ErrorCode::try_from(decoder.decode_int_2())?;
 
         let mut stage = None;
         let mut max_stage = None;
@@ -388,17 +394,17 @@ impl Deserialize for ErrPacket {
 
         // Progress Reporting
         if error_code as u16 == 0xFFFF {
-            stage = Some(decode_int_1(buf, &mut index));
-            max_stage = Some(decode_int_1(buf, &mut index));
-            progress = Some(decode_int_3(buf, &mut index));
-            progress_info = Some(decode_string_lenenc(&buf, &mut index));
+            stage = Some(decoder.decode_int_1());
+            max_stage = Some(decoder.decode_int_1());
+            progress = Some(decoder.decode_int_3());
+            progress_info = Some(decoder.decode_string_lenenc());
         } else {
-            if buf[index] == b'#' {
-                sql_state_marker = Some(decode_string_fix(buf, &mut index, 1));
-                sql_state = Some(decode_string_fix(buf, &mut index, 5));
-                error_message = Some(decode_string_eof(buf, &mut index));
+            if buf[decoder.index] == b'#' {
+                sql_state_marker = Some(decoder.decode_string_fix(1));
+                sql_state = Some(decoder.decode_string_fix(5));
+                error_message = Some(decoder.decode_string_eof());
             } else {
-                error_message = Some(decode_string_eof(buf, &mut index));
+                error_message = Some(decoder.decode_string_eof());
             }
         }
 
@@ -418,12 +424,12 @@ impl Deserialize for ErrPacket {
 }
 
 impl Deserialize for ColumnPacket {
-    fn deserialize(buf: &Bytes) -> Result<Self, Error> {
-        let mut index = 0;
+    fn deserialize(buf: &Bytes, decoder: Option<&mut Decoder>) -> Result<Self, Error> {
+        let mut decoder = decoder.unwrap_or(&mut Decoder::new(&buf));
 
-        let length = decode_length(&buf, &mut index)?;
-        let seq_no = decode_int_1(&buf, &mut index);
-        let columns = decode_int_lenenc(&buf, &mut index);
+        let length = decoder.decode_length()?;
+        let seq_no = decoder.decode_int_1();
+        let columns = decoder.decode_int_lenenc();
 
         Ok(ColumnPacket {
             length,
@@ -434,24 +440,24 @@ impl Deserialize for ColumnPacket {
 }
 
 impl Deserialize for ColumnDefPacket {
-    fn deserialize(buf: &Bytes) -> Result<Self, Error> {
-        let mut index = 0;
+    fn deserialize(buf: &Bytes, decoder: Option<&mut Decoder>) -> Result<Self, Error> {
+        let mut decoder = decoder.unwrap_or(&mut Decoder::new(&buf));
 
-        let length = decode_length(&buf, &mut index)?;
-        let seq_no = decode_int_1(&buf, &mut index);
+        let length = decoder.decode_length()?;
+        let seq_no = decoder.decode_int_1();
 
-        let catalog = decode_string_lenenc(&buf, &mut index);
-        let schema = decode_string_lenenc(&buf, &mut index);
-        let table_alias = decode_string_lenenc(&buf, &mut index);
-        let table = decode_string_lenenc(&buf, &mut index);
-        let column_alias = decode_string_lenenc(&buf, &mut index);
-        let column = decode_string_lenenc(&buf, &mut index);
-        let length_of_fixed_fields = decode_int_lenenc(&buf, &mut index);
-        let char_set = decode_int_2(&buf, &mut index);
-        let max_columns = decode_int_4(&buf, &mut index);
-        let field_type = FieldType::try_from(decode_int_1(&buf, &mut index))?;
-        let field_details = FieldDetailFlag::from_bits_truncate(decode_int_2(&buf, &mut index));
-        let decimals = decode_int_1(&buf, &mut index);
+        let catalog = decoder.decode_string_lenenc();
+        let schema = decoder.decode_string_lenenc();
+        let table_alias = decoder.decode_string_lenenc();
+        let table = decoder.decode_string_lenenc();
+        let column_alias = decoder.decode_string_lenenc();
+        let column = decoder.decode_string_lenenc();
+        let length_of_fixed_fields = decoder.decode_int_lenenc();
+        let char_set = decoder.decode_int_2();
+        let max_columns = decoder.decode_int_4();
+        let field_type = FieldType::try_from(decoder.decode_int_1())?;
+        let field_details = FieldDetailFlag::from_bits_truncate(decoder.decode_int_2());
+        let decimals = decoder.decode_int_1();
 
         // Skip last two unused bytes
         // index += 2;