func (f *Field) Dump(alloc arena.ArenaAllocator) []byte {
if f.Data != nil {
return []byte(f.Data)
}
l := len(f.Schema) + len(f.Table) + len(f.OrgTable) + len(f.Name) + len(f.OrgName) + len(f.DefaultValue) + 48
data := alloc.AllocBytes(l)
data = append(data, defCache...)
data = append(data, PutLengthEncodedString(f.Schema, alloc)...)
data = append(data, PutLengthEncodedString(f.Table, alloc)...)
data = append(data, PutLengthEncodedString(f.OrgTable, alloc)...)
data = append(data, PutLengthEncodedString(f.Name, alloc)...)
data = append(data, PutLengthEncodedString(f.OrgName, alloc)...)
data = append(data, 0x0c)
data = append(data, Uint16ToBytes(f.Charset)...)
data = append(data, Uint32ToBytes(f.ColumnLength)...)
data = append(data, f.Type)
data = append(data, Uint16ToBytes(f.Flag)...)
data = append(data, f.Decimal)
data = append(data, 0, 0)
if f.DefaultValue != nil {
data = append(data, Uint64ToBytes(f.DefaultValueLength)...)
data = append(data, f.DefaultValue...)
}
return data
}
func NewTrackedBuffer(nodeFormatter func(buf *TrackedBuffer, node SQLNode), alloc arena.ArenaAllocator) *TrackedBuffer {
buf := &TrackedBuffer{
Buffer: bytes.NewBuffer(alloc.AllocBytes(256)),
bindLocations: make([]bindLocation, 0, 4),
nodeFormatter: nodeFormatter,
}
return buf
}
func PutLengthEncodedString(b []byte, alloc arena.ArenaAllocator) []byte {
data := alloc.AllocBytes(len(b) + 9)
data = append(data, PutLengthEncodedInt(uint64(len(b)))...)
data = append(data, b...)
return data
}