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2021-05-31 22:56:52 +08:00
commit cea7de1475
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--- a/src/sql/engine/expr/ob_expr_promotion_util.cpp
+++ b/src/sql/engine/expr/ob_expr_promotion_util.cpp
@ -0,0 +1,72 @@
+/**
+ * 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_promotion_util.h"
+#include "sql/engine/expr/ob_expr_res_type.h"
+#include "lib/oblog/ob_log.h"
+#include "share/object/ob_obj_cast.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+
+#include "sql/engine/expr/ob_expr_div_promotion.map"
+#include "sql/engine/expr/ob_expr_nvl_promotion.map"
+
+struct MyIntegrityChecker3 {
+  MyIntegrityChecker3()
+  {
+    for (int tc1 = ObNullTC; tc1 < ObMaxTC; tc1++) {
+      for (int tc2 = ObNullTC; tc2 < tc1; tc2++) {
+        if (DIV_TYPE_PROMOTION[tc1][tc2] != DIV_TYPE_PROMOTION[tc2][tc1]) {
+          LOG_ERROR("DIV_TYPE_PROMOTION is wrong",
+              "ret",
+              OB_ERR_UNEXPECTED,
+              K(tc1),
+              K(tc2),
+              "tc1 => tc2",
+              DIV_TYPE_PROMOTION[tc1][tc2],
+              "tc2 => tc1",
+              DIV_TYPE_PROMOTION[tc2][tc1]);
+        }
+      }
+    }
+  }
+} MY_DIV_TYPE_PROMOTION_CHECKER;
+
+int ObExprPromotionUtil::get_nvl_type(ObExprResType& type, const ObExprResType& type1, const ObExprResType& type2)
+{
+  return get_calc_type(type, type1, type2, lib::is_oracle_mode() ? NVL_TYPE_PROMOTION_ORACLE : NVL_TYPE_PROMOTION);
+}
+
+int ObExprPromotionUtil::get_calc_type(
+    ObExprResType& type, const ObExprResType& type1, const ObExprResType& type2, const ObObjType map[ObMaxTC][ObMaxTC])
+{
+  int ret = OB_SUCCESS;
+  ObObjTypeClass l_tc = type1.get_type_class();
+  ObObjTypeClass r_tc = type2.get_type_class();
+  if (OB_UNLIKELY(l_tc < ObNullTC || l_tc >= ObMaxTC || r_tc < ObNullTC || r_tc >= ObMaxTC || OB_ISNULL(map))) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("left / right tc out of range, or map array is null", K(ret), K(l_tc), K(r_tc));
+  } else {
+    type.set_type(map[l_tc][r_tc]);
+    if (ObMaxType != type.get_type() && ob_is_nstring(type1.get_type())) {
+      type.set_type(ObNVarchar2Type);
+    }
+  }
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase