/**
 * 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_MERGE_STMT_PRINTER_H
#define OB_MERGE_STMT_PRINTER_H

#include "ob_dml_stmt_printer.h"
#include "sql/resolver/dml/ob_merge_stmt.h"
#include "sql/resolver/expr/ob_raw_expr_printer.h"

namespace oceanbase
{
namespace sql
{

class ObMergeStmtPrinter : public ObDMLStmtPrinter
{
public:
  ObMergeStmtPrinter()=delete;
  ObMergeStmtPrinter(char *buf, int64_t buf_len, int64_t *pos, const ObMergeStmt *stmt,
                     ObSchemaGetterGuard *schema_guard,
                     common::ObObjPrintParams print_params,
                      const ParamStore *param_store = NULL) :
    ObDMLStmtPrinter(buf, buf_len, pos, stmt, schema_guard, print_params, param_store) {}
  virtual ~ObMergeStmtPrinter() {}

  void init(char *buf, int64_t buf_len, int64_t *pos, ObMergeStmt *stmt);
  virtual int do_print();
private:
  int print();

  int print_conds(const ObIArray<ObRawExpr *> &conds);

  int print_update_clause(const ObMergeStmt &merge_stmt);

  int print_insert_clause(const ObMergeStmt &merge_stmt);

private:
  // disallow copy
  DISALLOW_COPY_AND_ASSIGN(ObMergeStmtPrinter);
};

}
}

#endif // OB_MERGE_STMT_PRINTER_H