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src/sql/engine/expr/ob_expr_shadow_uk_project.h

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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.
+ */
+
+#ifndef SQL_ENGINE_EXPR_OB_EXPR_SHADOW_UK_PROJECT_H_
+#define SQL_ENGINE_EXPR_OB_EXPR_SHADOW_UK_PROJECT_H_
+#include "sql/engine/expr/ob_expr_operator.h"
+namespace oceanbase {
+namespace sql {
+class ObExprShadowUKProject : public ObExprOperator {
+  public:
+  ObExprShadowUKProject(common::ObIAllocator& alloc)
+      : ObExprOperator(alloc, T_OP_SHADOW_UK_PROJECT, N_SHADOW_UK_PROJECTOR, MORE_THAN_ONE, NOT_ROW_DIMENSION)
+  {}
+  virtual ~ObExprShadowUKProject()
+  {}
+  virtual int calc_result_typeN(
+      ObExprResType& type, ObExprResType* types, int64_t param_num, common::ObExprTypeCtx& type_ctx) const
+  {
+    UNUSED(type_ctx);
+    int ret = common::OB_SUCCESS;
+    if (OB_ISNULL(types) || OB_UNLIKELY(param_num <= 1)) {
+      ret = common::OB_INVALID_ARGUMENT;
+      SQL_ENG_LOG(WARN, "invalid argument", K(types), K(param_num));
+    } else {
+      type = types[param_num - 1];
+    }
+    return ret;
+  }
+
+  virtual int cg_expr(ObExprCGCtx& ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
+
+  static int shadow_uk_project(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& datum);
+};
+}  // namespace sql
+}  // namespace oceanbase
+#endif /* SQL_ENGINE_EXPR_OB_EXPR_SHADOW_UK_PROJECT_H_ */