init push

2021-05-31 22:56:52 +08:00
commit cea7de1475
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--- a/src/sql/engine/set/ob_merge_intersect_op.cpp
+++ b/src/sql/engine/set/ob_merge_intersect_op.cpp
@ -0,0 +1,119 @@
+/**
+ * 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.
+ */
+
+#define USING_LOG_PREFIX SQL_ENG
+
+#include "ob_merge_intersect_op.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+
+ObMergeIntersectSpec::ObMergeIntersectSpec(common::ObIAllocator& alloc, const ObPhyOperatorType type)
+    : ObMergeSetSpec(alloc, type)
+{}
+
+OB_SERIALIZE_MEMBER((ObMergeIntersectSpec, ObMergeSetSpec));
+
+ObMergeIntersectOp::ObMergeIntersectOp(ObExecContext& exec_ctx, const ObOpSpec& spec, ObOpInput* input)
+    : ObMergeSetOp(exec_ctx, spec, input), right_iter_end_(false), first_got_right_row_(true)
+{}
+
+int ObMergeIntersectOp::inner_open()
+{
+  int ret = OB_SUCCESS;
+  if (OB_UNLIKELY(nullptr == left_ || nullptr == right_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("unexpected status: left or right is null", K(ret));
+  } else if (OB_FAIL(ObMergeSetOp::inner_open())) {
+    LOG_WARN("failed to init open", K(ret));
+  } else {
+    need_skip_init_row_ = true;
+  }
+  return ret;
+}
+
+int ObMergeIntersectOp::inner_close()
+{
+  return ObMergeSetOp::inner_close();
+}
+
+int ObMergeIntersectOp::rescan()
+{
+  int ret = OB_SUCCESS;
+  if (OB_FAIL(ObMergeSetOp::rescan())) {
+    LOG_WARN("failed to rescan", K(ret));
+  } else {
+    right_iter_end_ = false;
+    first_got_right_row_ = true;
+    need_skip_init_row_ = true;
+  }
+  return ret;
+}
+
+void ObMergeIntersectOp::destroy()
+{
+  ObMergeSetOp::destroy();
+}
+
+int ObMergeIntersectOp::inner_get_next_row()
+{
+  int ret = OB_SUCCESS;
+  int cmp = 0;
+  bool break_outer_loop = false;
+  const ObIArray<ObExpr*>* left_row = NULL;
+  clear_evaluated_flag();
+  while (OB_SUCC(ret) && OB_SUCC(do_strict_distinct(*left_, last_row_.store_row_, left_row))) {
+    while (OB_SUCC(ret) && !right_iter_end_) {
+      if (!first_got_right_row_) {
+        if (OB_FAIL(cmp_(right_->get_spec().output_, *left_row, eval_ctx_, cmp))) {
+          LOG_WARN("cmp_ input_row with right_row failed", K(*left_row), K(ret));
+        } else if (cmp >= 0) {
+          break_outer_loop = 0 == cmp ? true : false;
+          break;
+        } else {
+          if (OB_FAIL(right_->get_next_row())) {
+            if (OB_ITER_END == ret) {
+              right_iter_end_ = true;
+            } else {
+              LOG_WARN("fail to get right operator row", K(ret));
+            }
+          }
+        }
+      } else {
+        // get first row
+        first_got_right_row_ = false;
+        if (OB_FAIL(right_->get_next_row())) {
+          if (OB_ITER_END == ret) {
+            right_iter_end_ = true;
+          } else {
+            LOG_WARN("fail to get right operator row", K(ret));
+          }
+        }
+      }
+    }
+    if (break_outer_loop) {
+      break;
+    }
+  }
+  if (OB_SUCC(ret)) {
+    if (OB_FAIL(convert_row(*left_row, MY_SPEC.output_))) {
+      LOG_WARN("failed to convert row", K(ret));
+    } else if (OB_FAIL(last_row_.save_store_row(*left_row, eval_ctx_, 0))) {
+      LOG_WARN("failed to save right row", K(ret));
+    }
+  }
+  return ret;
+}
+
+}  // end namespace sql
+}  // end namespace oceanbase