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proc
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proc
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proc
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usr
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include
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mysql
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procedure.h
#ifndef PROCEDURE_INCLUDED #define PROCEDURE_INCLUDED /* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. Copyright (c) 2009, 2020, MariaDB Corporation. 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; version 2 of the License. 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ /* When using sql procedures */ #ifdef USE_PRAGMA_INTERFACE #pragma interface /* gcc class implementation */ #endif /* It is necessary to include set_var.h instead of item.h because there are dependencies on include order for set_var.h and item.h. This will be resolved later. */ #include "sql_class.h" /* select_result, set_var.h: THD */ #include "set_var.h" /* Item */ #define PROC_NO_SORT 1 /**< Bits in flags */ #define PROC_GROUP 2 /**< proc must have group */ /* Procedure items used by procedures to store values for send_result_set_metadata */ class Item_proc :public Item { public: Item_proc(THD *thd, const char *name_par): Item(thd) { this->name.str= name_par; this->name.length= strlen(name_par); } enum Type type() const override { return Item::PROC_ITEM; } Field *create_tmp_field_ex(MEM_ROOT *root, TABLE *table, Tmp_field_src *src, const Tmp_field_param *param) override { /* We can get to here when using a CURSOR for a query with PROCEDURE: DECLARE c CURSOR FOR SELECT * FROM t1 PROCEDURE analyse(); OPEN c; */ return create_tmp_field_ex_simple(root, table, src, param); } virtual void set(double nr)=0; virtual void set(const char *str,uint length,CHARSET_INFO *cs)=0; virtual void set(longlong nr)=0; const Type_handler *type_handler() const override=0; void set(const char *str) { set(str,(uint) strlen(str), default_charset()); } unsigned int size_of() { return sizeof(*this);} bool check_vcol_func_processor(void *arg) override { DBUG_ASSERT(0); // impossible return mark_unsupported_function("proc", arg, VCOL_IMPOSSIBLE); } bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) override { return type_handler()->Item_get_date_with_warn(thd, this, ltime, fuzzydate); } Item* do_get_copy(THD *thd) const override { return 0; } }; class Item_proc_real :public Item_proc { double value; public: Item_proc_real(THD *thd, const char *name_par, uint dec): Item_proc(thd, name_par) { decimals=dec; max_length=float_length(dec); } const Type_handler *type_handler() const override { return &type_handler_double; } void set(double nr) override { value=nr; } void set(longlong nr) override { value=(double) nr; } void set(const char *str,uint length,CHARSET_INFO *cs) override { int err_not_used; char *end_not_used; value= cs->strntod((char*) str,length, &end_not_used, &err_not_used); } double val_real() override { return value; } longlong val_int() override { return (longlong) value; } String *val_str(String *s) override { s->set_real(value,decimals,default_charset()); return s; } my_decimal *val_decimal(my_decimal *) override; unsigned int size_of() { return sizeof(*this);} }; class Item_proc_int :public Item_proc { longlong value; public: Item_proc_int(THD *thd, const char *name_par): Item_proc(thd, name_par) { max_length=11; } const Type_handler *type_handler() const override { if (unsigned_flag) return &type_handler_ulonglong; return &type_handler_slonglong; } void set(double nr) override { value=(longlong) nr; } void set(longlong nr) override { value=nr; } void set(const char *str,uint length, CHARSET_INFO *cs) override { int err; value= cs->strntoll(str,length,10,NULL,&err); } double val_real() override { return (double) value; } longlong val_int() override { return value; } String *val_str(String *s) override { s->set(value, default_charset()); return s; } my_decimal *val_decimal(my_decimal *) override; unsigned int size_of() { return sizeof(*this);} Item *do_get_copy(THD *thd) const override { return nullptr; } Item *do_build_clone(THD *thd) const override { return nullptr; } }; class Item_proc_string :public Item_proc { String value; public: Item_proc_string(THD *thd, const char *name_par, uint length): Item_proc(thd, name_par) { this->max_length=length; value.set_thread_specific(); } const Type_handler *type_handler() const override { return &type_handler_varchar; } void set(double nr) override { value.set_real(nr, 2, default_charset()); } void set(longlong nr) override { value.set(nr, default_charset()); } void set(const char *str, uint length, CHARSET_INFO *cs) override { value.copy(str,length,cs); } double val_real() override { int err_not_used; char *end_not_used; CHARSET_INFO *cs= value.charset(); return cs->strntod((char*) value.ptr(), value.length(), &end_not_used, &err_not_used); } longlong val_int() override { int err; CHARSET_INFO *cs=value.charset(); return cs->strntoll(value.ptr(), value.length(), 10, NULL, &err); } String *val_str(String*) override { return null_value ? (String*) 0 : &value; } my_decimal *val_decimal(my_decimal *) override; void cleanup() override { value.free(); } unsigned int size_of() { return sizeof(*this);} Item *do_get_copy(THD *thd) const override { return nullptr; } Item *do_build_clone(THD *thd) const override { return nullptr; } }; /* The procedure class definitions */ class Procedure { protected: List<Item> *fields; select_result *result; public: const uint flags; ORDER *group,*param_fields; Procedure(select_result *res,uint flags_par) :result(res),flags(flags_par), group(0),param_fields(0) {} virtual ~Procedure() {group=param_fields=0; fields=0; } virtual void add(void)=0; virtual void end_group(void)=0; virtual int send_row(List<Item> &fields)=0; virtual bool change_columns(THD *thd, List<Item> &fields)= 0; virtual void update_refs(void) {} virtual int end_of_records() { return 0; } }; Procedure *setup_procedure(THD *thd,ORDER *proc_param,select_result *result, List<Item> &field_list,int *error); #endif /* PROCEDURE_INCLUDED */
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