Method ValidateMeta

cpp/src/arrow/table.cc:210–243

 protected:
  Status ValidateMeta() const {
    // Make sure columns and schema are consistent
    if (static_cast<int>(columns_.size()) != schema_->num_fields()) {
      return Status::Invalid("Number of columns did not match schema");
    }
    for (int i = 0; i < num_columns(); ++i) {
      const ChunkedArray* col = columns_[i].get();
      if (col == nullptr) {
        return Status::Invalid("Column ", i, " was null");
      }
      if (!col->type()->Equals(*schema_->field(i)->type())) {
        return Status::Invalid("Column data for field ", i, " with type ",
                               col->type()->ToString(), " is inconsistent with schema ",
                               schema_->field(i)->type()->ToString());
      }
    }

    // Make sure columns are all the same length, and validate them
    for (int i = 0; i < num_columns(); ++i) {
      const ChunkedArray* col = columns_[i].get();
      if (col->length() != num_rows_) {
        return Status::Invalid("Column ", i, " named ", field(i)->name(),
                               " expected length ", num_rows_, " but got length ",
                               col->length());
      }
      Status st = col->Validate();
      if (!st.ok()) {
        std::stringstream ss;
        ss << "Column " << i << ": " << st.message();
        return st.WithMessage(ss.str());
      }
    }
    return Status::OK();
  }

 private:
  std::vector<std::shared_ptr<ChunkedArray>> columns_;