| Current File : //usr/include/mysql/server/private/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 */