88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#ifndef OCEANBASE_SQL_OB_SELECT_STMT_PRINTER_H_
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#define OCEANBASE_SQL_OB_SELECT_STMT_PRINTER_H_
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#include "ob_dml_stmt_printer.h"
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#include "sql/resolver/dml/ob_select_stmt.h"
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#include "sql/resolver/expr/ob_raw_expr_printer.h"
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namespace oceanbase {
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namespace sql {
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class ObSelectStmtPrinter : public ObDMLStmtPrinter {
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public:
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ObSelectStmtPrinter()
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: ObDMLStmtPrinter(),
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column_list_(NULL),
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is_set_subquery_(false),
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is_generated_table_(false),
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force_col_alias_(false)
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{}
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ObSelectStmtPrinter(char* buf, int64_t buf_len, int64_t* pos, const ObSelectStmt* stmt,
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common::ObObjPrintParams print_params, common::ObIArray<common::ObString>* column_list, bool is_set_subquery,
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bool is_generated_table = false, const bool force_col_alias = false)
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: ObDMLStmtPrinter(buf, buf_len, pos, stmt, print_params),
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column_list_(column_list),
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is_set_subquery_(is_set_subquery),
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is_generated_table_(is_generated_table),
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force_col_alias_(force_col_alias)
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{}
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virtual ~ObSelectStmtPrinter()
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{}
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void init(char* buf, int64_t buf_len, int64_t* pos, ObSelectStmt* stmt,
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common::ObIArray<common::ObString>* column_list, bool is_set_subquery);
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virtual int do_print();
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static int remove_double_quotation_for_string(ObString& alias_string, ObIAllocator& allocator);
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private:
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int print();
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int print_unpivot();
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int print_set_op_stmt();
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int print_basic_stmt();
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int print_select();
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int print_start_with();
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int print_connect_by();
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int print_group_by();
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int print_having();
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int print_order_by();
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int print_for_update();
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///////cte related functions
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int print_with();
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int print_cte_define_title(TableItem* cte_table);
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int print_search_and_cycle(TableItem* cte_table);
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int print_multi_rollup_items(const common::ObIArray<ObMultiRollupItem>& rollup_items);
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///////end of functions
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// disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObSelectStmtPrinter);
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private:
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// data members
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// create view v(column_list) as...
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common::ObIArray<common::ObString>* column_list_;
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// tell printer whether current stmt is a set left/right subquery
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bool is_set_subquery_;
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bool is_generated_table_;
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bool force_col_alias_;
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};
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} // end namespace sql
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} // end namespace oceanbase
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#endif // OCEANBASE_SQL_OB_SELECT_STMT_PRINTER_H_
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