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src/sql/engine/expr/ob_expr_not_equal.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_ENG
+#include "sql/engine/expr/ob_expr_not_equal.h"
+#include <math.h>
+#include "common/object/ob_obj_compare.h"
+//#include "sql/engine/expr/ob_expr_promotion_util.h"
+#include "sql/engine/expr/ob_expr_equal.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+
+ObExprNotEqual::ObExprNotEqual(ObIAllocator& alloc) : ObRelationalExprOperator(alloc, T_OP_NE, N_NOT_EQUAL, 2)
+{}
+
+int ObExprNotEqual::calc_result_type2(
+    ObExprResType& type, ObExprResType& type1, ObExprResType& type2, common::ObExprTypeCtx& type_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (lib::is_oracle_mode() && type1.is_ext() && type2.is_ext()) {
+    type.set_int32();  // not tinyint, compatible with MySQL
+    type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
+    type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
+    type.set_calc_type(type1.get_calc_type());
+    type.set_result_flag(OB_MYSQL_NOT_NULL_FLAG);
+  } else {
+    ret = ObRelationalExprOperator::calc_result_type2(type, type1, type2, type_ctx);
+  }
+  return ret;
+}
+
+int ObExprNotEqual::calc_result2(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (lib::is_oracle_mode() && obj1.get_meta().is_ext() && obj1.get_meta().is_ext()) {
+    ret = OB_NOT_SUPPORTED;
+  } else {
+    ret = ObRelationalExprOperator::calc_result2(result, obj1, obj2, expr_ctx, false, CO_NE);
+  }
+  return ret;
+}
+
+int ObExprNotEqual::calc_resultN(ObObj& result, const ObObj* objs_array, int64_t param_num, ObExprCtx& expr_ctx) const
+{
+  return ObRelationalExprOperator::calc_resultN(result, objs_array, param_num, expr_ctx, false, CO_NE);
+}
+
+int ObExprNotEqual::calc(
+    ObObj& result, const ObObj& obj1, const ObObj& obj2, const ObCompareCtx& cmp_ctx, ObCastCtx& cast_ctx)
+{
+  return ObRelationalExprOperator::compare(result, obj1, obj2, cmp_ctx, cast_ctx, CO_NE);
+}
+
+}  // namespace sql
+}  // namespace oceanbase