1 /* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License, version 2.0, 5 as published by the Free Software Foundation. 6 7 This program is also distributed with certain software (including 8 but not limited to OpenSSL) that is licensed under separate terms, 9 as designated in a particular file or component or in included license 10 documentation. The authors of MySQL hereby grant you an additional 11 permission to link the program and your derivative works with the 12 separately licensed software that they have included with MySQL. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License, version 2.0, for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program; if not, write to the Free Software 21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 22 */ 23 24 #ifndef NDBINFO_SCAN_VIRTUAL_HPP 25 #define NDBINFO_SCAN_VIRTUAL_HPP 26 27 #include "NdbInfo.hpp" 28 #include "NdbInfoScanOperation.hpp" 29 30 /* 31 Scan implementation for retrieving rows from a virtual 32 table (also known as "hardcoded"). 33 */ 34 class NdbInfoScanVirtual : public NdbInfoScanOperation { 35 public: 36 virtual int readTuples(); 37 38 virtual const class NdbInfoRecAttr* getValue(const char * anAttrName); 39 virtual const class NdbInfoRecAttr* getValue(Uint32 anAttrId); 40 virtual int execute(); 41 virtual int nextResult(); 42 virtual ~NdbInfoScanVirtual(); 43 44 NdbInfoScanVirtual(const NdbInfo::Table* table, 45 const class VirtualTable* virt); 46 int init(); 47 48 static bool create_virtual_tables(Vector<NdbInfo::Table*>& list); 49 static void delete_virtual_tables(Vector<NdbInfo::Table*>& list); 50 private: 51 enum State { Undefined, Initial, Prepared, 52 MoreData, End } m_state; 53 54 const NdbInfo::Table* const m_table; 55 const class VirtualTable* const m_virt; 56 57 friend class VirtualTable; 58 NdbInfoRecAttrCollection m_recAttrs; 59 60 char* m_buffer; 61 size_t m_buffer_size; 62 Uint32 m_row_counter; // Current row 63 }; 64 65 #endif 66