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src/sql/ob_sql_mode_manager.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 OCEANBASE_SQL_OB_SQL_MODE_MANAGER_H
+#define OCEANBASE_SQL_OB_SQL_MODE_MANAGER_H
+
+#include "common/sql_mode/ob_sql_mode.h"
+namespace oceanbase {
+namespace sql {
+
+// Get compatibility mode index of ObSQLModeManager, used to be compatible with old version
+// which ObSQLModeManager is used.
+extern int compatibility_mode2index(const common::ObCompatibilityMode mode, int64_t& index);
+
+//
+// ObSQLModeManager try to set default sql mode when compatibility mode switched, but hard to use.
+// When loading system variable sql mode is set before compatibility mode, sql mode lost when
+// compatibility mode switched.
+//
+
+/*
+class ObSQLModePair
+{
+public:
+  ObSQLModePair() : comp_mode_(common::ObCompatibilityMode::OCEANBASE_MODE), sql_mode_(0)
+  {}
+  ~ObSQLModePair()
+  {}
+public:
+  common::ObCompatibilityMode comp_mode_;
+  ObSQLMode sql_mode_;
+};
+
+class ObSQLModeManager
+{
+public:
+  static const int64_t COMPATIBILITY_MODE_COUNT = 3;
+  ObSQLModeManager():current_mode_index_(1)
+  {
+    reset();
+  }
+  ~ObSQLModeManager(){}
+  int set_compatibility_mode(common::ObCompatibilityMode comp_mode);
+  common::ObCompatibilityMode get_compatibility_mode() const;
+  void reset();
+  void  set_sql_mode(ObSQLMode mode);
+  ObSQLMode get_sql_mode() const;
+private:
+  int get_compatibility_index(common::ObCompatibilityMode comp_mode, int64_t &index) const;
+public:
+  ObSQLModePair sql_standard_[COMPATIBILITY_MODE_COUNT];
+  int64_t current_mode_index_;
+};
+*/
+}  // namespace sql
+}  // namespace oceanbase
+#endif