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src/sql/optimizer/ob_raw_expr_get_hash_value.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.
+ */
+
+#define USING_LOG_PREFIX SQL_OPT
+#include "ob_raw_expr_get_hash_value.h"
+
+/// interface of ObRawExprVisitor
+using namespace oceanbase::sql;
+using namespace oceanbase::common;
+
+int ObRawExprGetHashValue::get_hash_value(ObRawExpr& expr)
+{
+  return expr.postorder_accept(*this);
+}
+
+int ObRawExprGetHashValue::visit(ObConstRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+
+int ObRawExprGetHashValue::visit(ObVarRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+
+int ObRawExprGetHashValue::visit(ObQueryRefRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+int ObRawExprGetHashValue::visit(ObColumnRefRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+int ObRawExprGetHashValue::visit(ObOpRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+int ObRawExprGetHashValue::visit(ObCaseOpRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+int ObRawExprGetHashValue::visit(ObAggFunRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+int ObRawExprGetHashValue::visit(ObSysFunRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}
+
+int ObRawExprGetHashValue::visit(ObSetOpRawExpr& expr)
+{
+  seed_ = expr.hash(seed_);
+  return OB_SUCCESS;
+}