Ejemplo n.º 1
0
/**
 * 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(SerializeInput &input,
                                 type::AbstractPool *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();
  PL_ASSERT(column_count > 0);

  // Store the following information so that we can provide them to the user on
  // failure
  type::Type::TypeId 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] = (type::Type::TypeId)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 = " << types[column_itr] << std::endl;
    }

    throw SerializationException(message.str());
  }

  // Use the deserialization routine skipping header
  DeserializeTuplesFromWithoutHeader(input, pool);
}
Ejemplo n.º 2
0
/**
   * Therefore a SeqScanPlan is serialized as:
   * [(int) total size]
   * [(int8_t) plan type]
   * [(int) database_id]
   * [(int) table_id]
   * [(int) num column_id]
   * [(int) column id...]
   * [(int8_t) expr type]     : if invalid, predicate is null
   * [(bytes) predicate]      : predicate is Expression
   * [(int8_t) plan type]     : if invalid, parent is null
   * [(bytes) parent]         : parent is also a plan
 */
bool SeqScanPlan::DeserializeFrom(SerializeInput &input) {
  // Read the size of SeqScanPlan class
  input.ReadInt();

  // Read the type
  UNUSED_ATTRIBUTE PlanNodeType plan_type =
      (PlanNodeType)input.ReadEnumInSingleByte();
  PL_ASSERT(plan_type == GetPlanNodeType());

  // Read database id
  oid_t database_oid = input.ReadInt();

  // Read table id
  oid_t table_oid = input.ReadInt();

  // Get table and set it to the member
  storage::DataTable *target_table = static_cast<storage::DataTable *>(
      catalog::Catalog::GetInstance()->GetTableWithOid(database_oid, table_oid));
  SetTargetTable(target_table);

  // Read the number of column_id and set them to column_ids_
  oid_t columnid_count = input.ReadInt();
  for (oid_t it = 0; it < columnid_count; it++) {
    oid_t column_id = input.ReadInt();
    SetColumnId(column_id);
  }

  // Read the type
  ExpressionType expr_type = (ExpressionType)input.ReadEnumInSingleByte();

  // Predicate deserialization
  if (expr_type != EXPRESSION_TYPE_INVALID) {
    switch (expr_type) {
      //            case EXPRESSION_TYPE_COMPARE_IN:
      //                predicate_ =
      //                std::unique_ptr<EXPRESSION_TYPE_COMPARE_IN>(new
      //                ComparisonExpression (101));
      //                predicate_.DeserializeFrom(input);
      //              break;

      default: {
        LOG_ERROR(
            "Expression deserialization :: Unsupported EXPRESSION_TYPE: %u ",
            expr_type);
        break;
      }
    }
  }

  // Read the type of parent
  PlanNodeType parent_type = (PlanNodeType)input.ReadEnumInSingleByte();

  // Parent deserialization
  if (parent_type != PLAN_NODE_TYPE_INVALID) {
    switch (expr_type) {
      //            case EXPRESSION_TYPE_COMPARE_IN:
      //                predicate_ =
      //                std::unique_ptr<EXPRESSION_TYPE_COMPARE_IN>(new
      //                ComparisonExpression (101));
      //                predicate_.DeserializeFrom(input);
      //              break;

      default: {
        LOG_ERROR("Parent deserialization :: Unsupported PlanNodeType: %u ",
                  expr_type);
        break;
      }
    }
  }

  return true;
}