init push

src/sql/engine/expr/ob_expr_lnnvl.h

@@ -0,0 +1,49 @@
+/**
+ * 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 _OB_EXPR_LNNVL_H
+#define _OB_EXPR_LNNVL_H
+
+#include "sql/engine/expr/ob_expr_operator.h"
+
+namespace oceanbase {
+namespace sql {
+class ObExprFuncLnnvl : public ObFuncExprOperator {
+  public:
+  explicit ObExprFuncLnnvl(common::ObIAllocator& alloc);
+  virtual ~ObExprFuncLnnvl();
+  virtual int calc_result1(common::ObObj& result, const common::ObObj& input, common::ObExprCtx& expr_ctx) const;
+  virtual int calc_result_type1(ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const;
+  virtual int cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const override;
+
+  static int eval_lnnvl(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum);
+
+  private:
+  // disallow copy
+  DISALLOW_COPY_AND_ASSIGN(ObExprFuncLnnvl);
+};
+
+inline int ObExprFuncLnnvl::calc_result_type1(
+    ObExprResType& type, ObExprResType& type1, common::ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  UNUSED(type1);
+  type.set_tinyint();
+  type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObTinyIntType].scale_);
+  type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObTinyIntType].precision_);
+  type1.set_calc_type(common::ObTinyIntType);
+  return common::OB_SUCCESS;
+}
+
+}  // namespace sql
+}  // namespace oceanbase
+#endif /*OB_SQL_EXPR_FUNC_END*/