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Diffstat (limited to 'storage/ndb/src/old_files/client/odbc/codegen/Code_query_group.hpp')
| -rw-r--r-- | storage/ndb/src/old_files/client/odbc/codegen/Code_query_group.hpp | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/storage/ndb/src/old_files/client/odbc/codegen/Code_query_group.hpp b/storage/ndb/src/old_files/client/odbc/codegen/Code_query_group.hpp new file mode 100644 index 00000000000..e79022c5284 --- /dev/null +++ b/storage/ndb/src/old_files/client/odbc/codegen/Code_query_group.hpp @@ -0,0 +1,221 @@ +/* Copyright (C) 2003 MySQL AB + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ + +#ifndef ODBC_CODEGEN_Code_query_group_hpp +#define ODBC_CODEGEN_Code_query_group_hpp + +#include <functional> +#include <common/common.hpp> +#include "Code_query.hpp" +#include "Code_expr_row.hpp" +#include "Code_pred.hpp" + +/** + * @class Plan_query_group + * @brief Group-by node in PlanTree + */ +class Plan_query_group : public Plan_query { +public: + Plan_query_group(Plan_root* root); + virtual ~Plan_query_group(); + Plan_base* analyze(Ctx& ctx, Ctl& ctl); + Exec_base* codegen(Ctx& ctx, Ctl& ctl); + void print(Ctx& ctx); + // children + void setQuery(Plan_query* query); + void setDataRow(Plan_expr_row* dataRow); + void setGroupRow(Plan_expr_row* groupRow); + void setHavingPred(Plan_pred* havingPred); + Plan_expr_row* getRow(); +protected: + Plan_query* m_query; + Plan_expr_row* m_dataRow; + Plan_expr_row* m_groupRow; + Plan_pred* m_havingPred; +}; + +inline +Plan_query_group::Plan_query_group(Plan_root* root) : + Plan_query(root), + m_query(0), + m_dataRow(0), + m_groupRow(0), + m_havingPred(0) +{ +} + +// children + +inline void +Plan_query_group::setQuery(Plan_query* query) +{ + ctx_assert(query != 0); + m_query = query; +} + +inline void +Plan_query_group::setDataRow(Plan_expr_row* dataRow) +{ + ctx_assert(dataRow != 0); + m_dataRow = dataRow; +} + +inline void +Plan_query_group::setGroupRow(Plan_expr_row* groupRow) +{ + ctx_assert(groupRow != 0); + m_groupRow = groupRow; +} + +inline void +Plan_query_group::setHavingPred(Plan_pred* havingPred) +{ + ctx_assert(havingPred != 0); + m_havingPred = havingPred; +} + +/** + * Group-by uses a std::map. Key is values grouped by. Data is unique index + * (starting at 1) into arrays in expression data. + */ + +class Exec_query_group; + +struct GroupLess : std::binary_function<const SqlRow*, const SqlRow*, bool> { + bool operator()(const SqlRow* s1, const SqlRow* s2) const; +}; + +typedef std::map<const SqlRow*, unsigned, GroupLess> GroupList; + +/** + * @class Exec_query_group + * @brief Group-by node in ExecTree + */ +class Exec_query_group : public Exec_query { +public: + class Code : public Exec_query::Code { + public: + Code(const SqlSpecs& sqlSpecs); + virtual ~Code(); + protected: + friend class Exec_query_group; + // sets reference to Sqlspecs from subquery + }; + class Data : public Exec_query::Data { + public: + Data(Exec_query_group* node, const SqlSpecs& sqlSpecs); + virtual ~Data(); + protected: + friend class Exec_query_group; + SqlRow m_sqlRow; // current row + bool m_grouped; // fetch and group-by done + unsigned m_count; + GroupList m_groupList; + GroupList::iterator m_iterator; + }; + Exec_query_group(Exec_root* root); + virtual ~Exec_query_group(); + void alloc(Ctx& ctx, Ctl& ctl); + void execImpl(Ctx& ctx, Ctl& ctl); + bool fetchImpl(Ctx& ctx, Ctl& ctl); + void close(Ctx& ctx); + void print(Ctx& ctx); + // children + const Code& getCode() const; + Data& getData() const; + void setQuery(Exec_query* query); + void setDataRow(Exec_expr_row* dataRow); + void setGroupRow(Exec_expr_row* groupRow); + void setHavingPred(Exec_pred* havingPred); + const Exec_query* getRawQuery() const; +protected: + friend class Exec_query; + Exec_query* m_query; + Exec_expr_row* m_dataRow; + Exec_expr_row* m_groupRow; + Exec_pred* m_havingPred; +}; + +inline +Exec_query_group::Code::Code(const SqlSpecs& sqlSpecs) : + Exec_query::Code(sqlSpecs) +{ +} + +inline +Exec_query_group::Data::Data(Exec_query_group* node, const SqlSpecs& sqlSpecs) : + Exec_query::Data(node, m_sqlRow), + m_sqlRow(sqlSpecs), + m_grouped(false), + m_count(0) +{ +} + +inline +Exec_query_group::Exec_query_group(Exec_root* root) : + Exec_query(root), + m_query(0), + m_dataRow(0), + m_groupRow(0), + m_havingPred(0) +{ +} + +// children + +inline const Exec_query_group::Code& +Exec_query_group::getCode() const +{ + const Code* code = static_cast<const Code*>(m_code); + return *code; +} + +inline Exec_query_group::Data& +Exec_query_group::getData() const +{ + Data* data = static_cast<Data*>(m_data); + return *data; +} + +inline void +Exec_query_group::setQuery(Exec_query* query) +{ + ctx_assert(m_query == 0 && query != 0); + m_query = query; +} + +inline void +Exec_query_group::setDataRow(Exec_expr_row* dataRow) +{ + ctx_assert(m_dataRow == 0 && dataRow != 0); + m_dataRow = dataRow; +} + +inline void +Exec_query_group::setGroupRow(Exec_expr_row* groupRow) +{ + ctx_assert(m_groupRow == 0 && groupRow != 0); + m_groupRow = groupRow; +} + +inline void +Exec_query_group::setHavingPred(Exec_pred* havingPred) +{ + ctx_assert(m_havingPred == 0 && havingPred != 0); + m_havingPred = havingPred; +} + +#endif |