C++ (Cpp) cass_value_get_double Examples

Example #1

File: named_parameters.c Project: Instagram/cpp-driver

CassError select_from_basic(CassSession* session, const char* key, Basic* basic) {
  CassError rc = CASS_OK;
  CassStatement* statement = NULL;
  CassFuture* future = NULL;

  const char* query
    = "SELECT * FROM examples.basic WHERE key = ?";

  statement = cass_statement_new(query, 1);

  cass_statement_bind_string_by_name(statement, "key", key);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  } else {
    const CassResult* result = cass_future_get_result(future);
    CassIterator* iterator = cass_iterator_from_result(result);

    if (cass_iterator_next(iterator)) {
      const CassRow* row = cass_iterator_get_row(iterator);

      cass_value_get_bool(cass_row_get_column_by_name(row, "BLN"), &basic->bln);
      cass_value_get_double(cass_row_get_column_by_name(row, "dbl"), &basic->dbl);
      cass_value_get_float(cass_row_get_column_by_name(row, "flt"), &basic->flt);
      cass_value_get_int32(cass_row_get_column_by_name(row, "\"i32\""), &basic->i32);
      cass_value_get_int64(cass_row_get_column_by_name(row, "i64"), &basic->i64);
    }

    cass_result_free(result);
    cass_iterator_free(iterator);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

Example #2

File: prepared.c Project: Instagram/cpp-driver

CassError select_from_basic(CassSession* session, const CassPrepared * prepared, const char* key, Basic* basic) {
  CassError rc = CASS_OK;
  CassStatement* statement = NULL;
  CassFuture* future = NULL;

  statement = cass_prepared_bind(prepared);

  cass_statement_bind_string(statement, 0, key);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  } else {
    const CassResult* result = cass_future_get_result(future);
    CassIterator* iterator = cass_iterator_from_result(result);

    if (cass_iterator_next(iterator)) {
      const CassRow* row = cass_iterator_get_row(iterator);

      cass_value_get_bool(cass_row_get_column(row, 1), &basic->bln);
      cass_value_get_double(cass_row_get_column(row, 2), &basic->dbl);
      cass_value_get_float(cass_row_get_column(row, 3), &basic->flt);
      cass_value_get_int32(cass_row_get_column(row, 4), &basic->i32);
      cass_value_get_int64(cass_row_get_column(row, 5), &basic->i64);
    }

    cass_result_free(result);
    cass_iterator_free(iterator);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

Example #3

File: test_utils.hpp Project: jeremyschlatter/cpp-driver

 static CassError get(const CassValue* value, cass_double_t* output) {
   return cass_value_get_double(value, output);
 }