/**
* Loads only tuple data, not schema, from the serialized tile.
* Used for initial data loading.
* @param allow_export if false, export enabled is overriden for this load.
*/
void Tile::DeserializeTuplesFrom(SerializeInputBE &input, VarlenPool *pool) {
/*
* Directly receives a Tile buffer.
* [00 01] [02 03] [04 .. 0x]
* rowstart colcount colcount * 1 byte (column types)
*
* [0x+1 .. 0y]
* colcount * strings (column names)
*
* [0y+1 0y+2 0y+3 0y+4]
* rowcount
*
* [0y+5 .. end]
* rowdata
*/
input.ReadInt(); // rowstart
input.ReadByte();
oid_t column_count = input.ReadShort();
assert(column_count > 0);
// Store the following information so that we can provide them to the user on
// failure
ValueType types[column_count];
std::vector<std::string> names;
// Skip the column types
for (oid_t column_itr = 0; column_itr < column_count; ++column_itr) {
types[column_itr] = (ValueType) input.ReadEnumInSingleByte();
}
// Skip the column names
for (oid_t column_itr = 0; column_itr < column_count; ++column_itr) {
names.push_back(input.ReadTextString());
}
// Check if the column count matches what the temp table is expecting
if (column_count != schema.GetColumnCount()) {
std::stringstream message(std::stringstream::in | std::stringstream::out);
message << "Column count mismatch. Expecting " << schema.GetColumnCount()
<< ", but " << column_count << " given" << std::endl;
message << "Expecting the following columns:" << std::endl;
message << schema.GetColumnCount() << std::endl;
message << "The following columns are given:" << std::endl;
for (oid_t column_itr = 0; column_itr < column_count; column_itr++) {
message << "column " << column_itr << ": " << names[column_itr]
<< ", type = " << ValueTypeToString(types[column_itr])
<< std::endl;
}
throw SerializationException(message.str());
}
// Use the deserialization routine skipping header
DeserializeTuplesFromWithoutHeader(input, pool);
}
/**
* Loads only tuple data and assumes there is no schema present.
* Used for recovery where the schema is not sent.
* @param allow_export if false, export enabled is overriden for this load.
*/
void Tile::DeserializeTuplesFromWithoutHeader(SerializeInputBE &input,
VarlenPool *pool) {
oid_t tuple_count = input.ReadInt();
assert(tuple_count > 0);
// First, check if we have required space
assert(tuple_count <= num_tuple_slots);
storage::Tuple *temp_tuple = new storage::Tuple(&schema, true);
for (oid_t tuple_itr = 0; tuple_itr < tuple_count; ++tuple_itr) {
temp_tuple->Move(GetTupleLocation(tuple_itr));
temp_tuple->DeserializeFrom(input, pool);
// TRACE("Loaded new tuple #%02d\n%s", tuple_itr,
// temp_target1.debug(Name()).c_str());
}
}
void Tuple::DeserializeWithHeaderFrom(SerializeInputBE &input) {
PL_ASSERT(tuple_schema);
PL_ASSERT(tuple_data);
input.ReadInt(); // Read in the tuple size, discard
const int column_count = tuple_schema->GetColumnCount();
for (int column_itr = 0; column_itr < column_count; column_itr++) {
const ValueType type = tuple_schema->GetType(column_itr);
const bool is_inlined = tuple_schema->IsInlined(column_itr);
char *data_ptr = GetDataPtr(column_itr);
const int32_t column_length = tuple_schema->GetLength(column_itr);
// TODO: Not sure about arguments
const bool is_in_bytes = false;
Value::DeserializeFrom(input, NULL, data_ptr, type, is_inlined,
column_length, is_in_bytes);
}
}
void Tuple::DeserializeFrom(SerializeInputBE &input, VarlenPool *dataPool) {
PL_ASSERT(tuple_schema);
PL_ASSERT(tuple_data);
input.ReadInt();
const int column_count = tuple_schema->GetColumnCount();
for (int column_itr = 0; column_itr < column_count; column_itr++) {
const ValueType type = tuple_schema->GetType(column_itr);
/**
* DeserializeFrom is only called when we serialize/deserialize tables.
* The serialization format for Strings/Objects in a serialized table
* happens to have the same in memory representation as the Strings/Objects
* in a Tuple. The goal here is to wrap the serialized representation of
* the value in an Value and then serialize that into the tuple from the
* Value. This makes it possible to push more value specific functionality
* out of Tuple. The memory allocation will be performed when serializing
* to tuple storage.
*/
const bool is_inlined = tuple_schema->IsInlined(column_itr);
int32_t column_length;
char *data_ptr = GetDataPtr(column_itr);
if (is_inlined) {
column_length = tuple_schema->GetLength(column_itr);
} else {
column_length = tuple_schema->GetVariableLength(column_itr);
}
// TODO: Not sure about arguments
const bool is_in_bytes = false;
Value::DeserializeFrom(input, dataPool, data_ptr, type, is_inlined,
column_length, is_in_bytes);
}
}
