Function TimedTestMultiOr

cpp/src/gandiva/tests/micro_benchmarks.cc:282–315

// in expr. will be used in follow-up PRs to optimize in expr.

static void TimedTestMultiOr(benchmark::State& state) {
  // schema for input fields
  auto fielda = field("a", utf8());
  auto schema = arrow::schema({fielda});
  auto pool_ = arrow::default_memory_pool();

  // output fields
  auto field_result = field("res", boolean());

  // build expression.
  // booleanOr(a = string1, a = string2, ..)
  auto node_a = TreeExprBuilder::MakeField(fielda);

  NodeVector boolean_functions;
  FastUtf8DataGenerator data_generator1(250);
  for (int thresh = 1; thresh <= 32; thresh++) {
    auto literal = TreeExprBuilder::MakeStringLiteral(data_generator1.GenerateData());
    auto condition = TreeExprBuilder::MakeFunction("equal", {node_a, literal}, boolean());
    boolean_functions.push_back(condition);
  }

  auto boolean_or = TreeExprBuilder::MakeOr(boolean_functions);
  auto expr = TreeExprBuilder::MakeExpression(boolean_or, field_result);

  // Build a projector for the expressions.
  std::shared_ptr<Projector> projector;
  ASSERT_OK(Projector::Make(schema, {expr}, TestConfiguration(), &projector));

  FastUtf8DataGenerator data_generator(250);
  ProjectEvaluator evaluator(projector);
  Status status = TimedEvaluate<arrow::StringType, std::string>(
      schema, evaluator, data_generator, pool_, 100 * THOUSAND, 16 * THOUSAND, state);
  ASSERT_OK(status);
}

static void TimedTestInExpr(benchmark::State& state) {
  // schema for input fields