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Diffstat (limited to '')
| -rw-r--r-- | sql/procedure.h | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/sql/procedure.h b/sql/procedure.h new file mode 100644 index 00000000..769eac5f --- /dev/null +++ b/sql/procedure.h @@ -0,0 +1,184 @@ +#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 { return Item::PROC_ITEM; } + Field *create_tmp_field_ex(MEM_ROOT *root, TABLE *table, Tmp_field_src *src, + const Tmp_field_param *param) + { + /* + 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=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) + { + DBUG_ASSERT(0); // impossible + return mark_unsupported_function("proc", arg, VCOL_IMPOSSIBLE); + } + bool get_date(THD *thd, MYSQL_TIME *ltime, date_mode_t fuzzydate) + { + return type_handler()->Item_get_date_with_warn(thd, this, ltime, fuzzydate); + } + Item* get_copy(THD *thd) { 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 { return &type_handler_double; } + void set(double nr) { value=nr; } + void set(longlong nr) { value=(double) nr; } + void set(const char *str,uint length,CHARSET_INFO *cs) + { + int err_not_used; + char *end_not_used; + value= cs->strntod((char*) str,length, &end_not_used, &err_not_used); + } + double val_real() { return value; } + longlong val_int() { return (longlong) value; } + String *val_str(String *s) + { + s->set_real(value,decimals,default_charset()); + return s; + } + my_decimal *val_decimal(my_decimal *); + 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 + { + if (unsigned_flag) + return &type_handler_ulonglong; + return &type_handler_slonglong; + } + void set(double nr) { value=(longlong) nr; } + void set(longlong nr) { value=nr; } + void set(const char *str,uint length, CHARSET_INFO *cs) + { int err; value= cs->strntoll(str,length,10,NULL,&err); } + double val_real() { return (double) value; } + longlong val_int() { return value; } + String *val_str(String *s) { s->set(value, default_charset()); return s; } + my_decimal *val_decimal(my_decimal *); + unsigned int size_of() { return sizeof(*this);} +}; + + +class Item_proc_string :public Item_proc +{ +public: + Item_proc_string(THD *thd, const char *name_par, uint length): + Item_proc(thd, name_par) { this->max_length=length; } + const Type_handler *type_handler() const { return &type_handler_varchar; } + void set(double nr) { str_value.set_real(nr, 2, default_charset()); } + void set(longlong nr) { str_value.set(nr, default_charset()); } + void set(const char *str, uint length, CHARSET_INFO *cs) + { str_value.copy(str,length,cs); } + double val_real() + { + int err_not_used; + char *end_not_used; + CHARSET_INFO *cs= str_value.charset(); + return cs->strntod((char*) str_value.ptr(), str_value.length(), + &end_not_used, &err_not_used); + } + longlong val_int() + { + int err; + CHARSET_INFO *cs=str_value.charset(); + return cs->strntoll(str_value.ptr(),str_value.length(),10,NULL,&err); + } + String *val_str(String*) + { + return null_value ? (String*) 0 : (String*) &str_value; + } + my_decimal *val_decimal(my_decimal *); + unsigned int size_of() { return sizeof(*this);} +}; + +/* 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 */ |