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Diffstat (limited to 'storage/ndb/src/old_files/client/odbc/codegen/Code_expr_func.hpp')
| -rw-r--r-- | storage/ndb/src/old_files/client/odbc/codegen/Code_expr_func.hpp | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/storage/ndb/src/old_files/client/odbc/codegen/Code_expr_func.hpp b/storage/ndb/src/old_files/client/odbc/codegen/Code_expr_func.hpp new file mode 100644 index 00000000000..856d7529875 --- /dev/null +++ b/storage/ndb/src/old_files/client/odbc/codegen/Code_expr_func.hpp @@ -0,0 +1,193 @@ +/* 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_expr_func_hpp +#define ODBC_CODEGEN_Code_expr_func_hpp + +#include <common/common.hpp> +#include <common/DataField.hpp> +#include "Code_expr.hpp" +#include "Code_expr_row.hpp" + +/** + * @class Expr_func + * @brief Specifies a function + */ +struct Expr_func { + enum Code { + Undef = 0, + Substr, + Left, + Right, + Count, + Max, + Min, + Sum, + Avg, + Rownum, + Sysdate + }; + Expr_func(Code code, const char* name, bool aggr); + Code m_code; + const char* m_name; + bool m_aggr; + static const Expr_func& find(const char* name); +}; + +inline +Expr_func::Expr_func(Code code, const char* name, bool aggr) : + m_code(code), + m_name(name), + m_aggr(aggr) +{ +} + +/** + * @class Plan_expr_func + * @brief Function node in an expression in PlanTree + */ +class Plan_expr_func : public Plan_expr { +public: + Plan_expr_func(Plan_root* root, const Expr_func& func); + virtual ~Plan_expr_func(); + Plan_base* analyze(Ctx& ctx, Ctl& ctl); + Exec_base* codegen(Ctx& ctx, Ctl& ctl); + void print(Ctx& ctx); + bool isEqual(const Plan_expr* expr) const; + bool isGroupBy(const Plan_expr_row* row) const; + // children + void setArgs(Plan_expr_row* args); +protected: + const Expr_func& m_func; + Plan_expr_row* m_args; + unsigned m_narg; + SqlType* m_conv; // temp work area +}; + +inline +Plan_expr_func::Plan_expr_func(Plan_root* root, const Expr_func& func) : + Plan_expr(root, TypeFunc), + m_func(func), + m_args(0), + m_narg(0), + m_conv(0) +{ +} + +inline void +Plan_expr_func::setArgs(Plan_expr_row* args) +{ + if (args == 0) { + m_args = 0; + m_narg = 0; + } else { + m_args = args; + m_narg = m_args->getSize(); + delete[] m_conv; + m_conv = new SqlType[1 + m_narg]; + } +} + +/** + * @class Exec_expr_func + * @brief Function node in an expression in ExecTree + */ +class Exec_expr_func : public Exec_expr { +public: + class Code : public Exec_expr::Code { + public: + Code(const Expr_func& func, const SqlSpec& spec); + virtual ~Code(); + protected: + friend class Plan_expr_func; + friend class Exec_expr_func; + const Expr_func& m_func; + const SqlSpec m_sqlSpec; + unsigned m_narg; + Exec_expr** m_args; // XXX pointers for now + }; + class Data : public Exec_expr::Data { + public: + Data(const SqlField& sqlField); + virtual ~Data(); + protected: + friend class Exec_expr_func; + SqlField m_sqlField; + struct Acc { // accumulators etc + SqlBigint m_count; // current row count + union { + SqlBigint m_bigint; + SqlDouble m_double; + SqlDatetime m_sysdate; + }; + }; + // group-by extra accumulators (default in entry 0) + typedef std::vector<Acc> GroupAcc; + GroupAcc m_groupAcc; + }; + Exec_expr_func(Exec_root* root); + virtual ~Exec_expr_func(); + void alloc(Ctx& ctx, Ctl& ctl); + void evaluate(Ctx& ctx, Ctl& ctl); + void close(Ctx& ctx); + void print(Ctx& ctx); + // children + const Code& getCode() const; + Data& getData() const; +protected: + void init(Ctx &ctx, Ctl& ctl); // initialize values +}; + +inline +Exec_expr_func::Code::Code(const Expr_func& func, const SqlSpec& sqlSpec) : + Exec_expr::Code(m_sqlSpec), + m_func(func), + m_sqlSpec(sqlSpec), + m_args(0) +{ +} + +inline +Exec_expr_func::Data::Data(const SqlField& sqlField) : + Exec_expr::Data(m_sqlField), + m_sqlField(sqlField), + m_groupAcc(1) +{ +} + +inline +Exec_expr_func::Exec_expr_func(Exec_root* root) : + Exec_expr(root) +{ +} + +// children + +inline const Exec_expr_func::Code& +Exec_expr_func::getCode() const +{ + const Code* code = static_cast<const Code*>(m_code); + return *code; +} + +inline Exec_expr_func::Data& +Exec_expr_func::getData() const +{ + Data* data = static_cast<Data*>(m_data); + return *data; +} + +#endif |