[FEAT MERGE] sql execution improvements

Co-authored-by: DengzhiLiu <dengzhiliu@gmail.com>
Co-authored-by: Zach41 <zach_41@163.com>
Co-authored-by: tushicheng <18829573815@163.com>

unittest/sql/engine/px/test_adaptive_slide_window.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include <gtest/gtest.h>
+
+#define private public
+#include "sql/engine/expr/ob_expr_operator.h"
+
+#define ADAPTIVE_SLIDE_WINDOW_SIZE 4096
+
+using namespace std;
+namespace oceanbase
+{
+namespace sql
+{
+class AdapitveSlideWindowTest : public ::testing::Test
+{
+public:
+  AdapitveSlideWindowTest() = default;
+  virtual ~AdapitveSlideWindowTest() = default;
+  virtual void SetUp(){};
+  virtual void TearDown(){};
+
+public:
+  int64_t total_count_{0};
+  ObAdaptiveFilterSlideWindow slide_window_{total_count_};
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(AdapitveSlideWindowTest);
+};
+
+static void mock_filter(ObAdaptiveFilterSlideWindow &slide_window, int64_t &total_count)
+{
+  bool reopen_flag = false;
+  int64_t partial_total_count = common::ObRandom::rand(1, ADAPTIVE_SLIDE_WINDOW_SIZE);
+  int64_t partial_filter_count = common::ObRandom::rand(0, partial_total_count);
+  total_count += partial_total_count;
+  if (slide_window.dynamic_disable()) {
+    if (slide_window.cur_pos_ >= slide_window.next_check_start_pos_) {
+      reopen_flag = true;
+    }
+    partial_filter_count = 0;
+    slide_window.update_slide_window_info(partial_filter_count, partial_total_count);
+    EXPECT_EQ(reopen_flag, !slide_window.dynamic_disable());
+    EXPECT_EQ(0, slide_window.partial_filter_count_);
+    EXPECT_EQ(0, slide_window.partial_total_count_);
+  } else {
+    int64_t acc_partial_total_count = partial_total_count + slide_window.partial_total_count_;
+    int64_t acc_partial_filter_count = partial_filter_count + slide_window.partial_filter_count_;
+    double filter_rate = acc_partial_filter_count / (double)acc_partial_total_count;
+    bool need_check_filter_rate =
+        total_count >= slide_window.next_check_start_pos_ + ADAPTIVE_SLIDE_WINDOW_SIZE;
+    slide_window.update_slide_window_info(partial_filter_count, partial_total_count);
+    if (need_check_filter_rate) {
+      if (filter_rate >= 0.5) {
+        EXPECT_EQ(false, slide_window.dynamic_disable());
+        EXPECT_EQ(0, slide_window.window_cnt_);
+        EXPECT_EQ(total_count, slide_window.next_check_start_pos_);
+      } else {
+        EXPECT_EQ(true, slide_window.dynamic_disable());
+      }
+      EXPECT_EQ(0, slide_window.partial_filter_count_);
+      EXPECT_EQ(0, slide_window.partial_total_count_);
+    } else {
+      EXPECT_EQ(acc_partial_filter_count, slide_window.partial_filter_count_);
+      EXPECT_EQ(acc_partial_total_count, slide_window.partial_total_count_);
+    }
+  }
+}
+
+TEST_F(AdapitveSlideWindowTest, test_adaptive_slide_window)
+{
+  slide_window_.start_to_work();
+  for (int64_t i = 0; i < 100; ++i) { mock_filter(slide_window_, total_count_); }
+}
+
+} // namespace sql
+} // namespace oceanbase
+int main(int argc, char **argv)
+{
+  OB_LOGGER.set_log_level("TRACE");
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}