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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* 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 02110-1301 USA
*/
#ifndef DRIZZLED_ITEM_FIELD_H
#define DRIZZLED_ITEM_FIELD_H
namespace drizzled
{
extern Item **not_found_item;
class COND_EQUAL;
class Item_field :public Item_ident
{
protected:
void set_field(Field *field);
public:
Field *field,*result_field;
Item_equal *item_equal;
bool no_const_subst;
/*
if any_privileges set to true then here real effective privileges will
be stored
*/
uint32_t have_privileges;
/* field need any privileges (for VIEW creation) */
bool any_privileges;
Item_field(Name_resolution_context *context_arg,
const char *db_arg,const char *table_name_arg,
const char *field_name_arg);
/*
Constructor needed to process subselect with temporary tables (see Item)
*/
Item_field(Session *session, Item_field *item);
/*
Constructor used inside setup_wild(), ensures that field, table,
and database names will live as long as Item_field (this is important
in prepared statements).
*/
Item_field(Session *session, Name_resolution_context *context_arg, Field *field);
/*
If this constructor is used, fix_fields() won't work, because
db_name, table_name and column_name are unknown. It's necessary to call
reset_field() before fix_fields() for all fields created this way.
*/
Item_field(Field *field);
enum Type type() const { return FIELD_ITEM; }
bool eq(const Item *item, bool binary_cmp) const;
double val_real();
int64_t val_int();
type::Decimal *val_decimal(type::Decimal *);
String *val_str(String*);
double val_result();
int64_t val_int_result();
String *str_result(String* tmp);
type::Decimal *val_decimal_result(type::Decimal *);
bool val_bool_result();
bool send(plugin::Client *client, String *str_arg);
void reset_field(Field *f);
bool fix_fields(Session *, Item **);
void fix_after_pullout(Select_Lex *new_parent, Item **ref);
void make_field(SendField *tmp_field);
int save_in_field(Field *field,bool no_conversions);
void save_org_in_field(Field *field);
table_map used_tables() const;
enum Item_result result_type () const;
Item_result cast_to_int_type() const;
enum_field_types field_type() const;
int64_t val_int_endpoint(bool left_endp, bool *incl_endp);
Field *get_tmp_table_field() { return result_field; }
Field *tmp_table_field(Table *) { return result_field; }
bool get_date(type::Time *ltime,uint32_t fuzzydate);
bool get_date_result(type::Time *ltime,uint32_t fuzzydate);
bool get_time(type::Time *ltime);
bool is_null();
void update_null_value();
Item *get_tmp_table_item(Session *session);
bool collect_item_field_processor(unsigned char * arg);
bool find_item_in_field_list_processor(unsigned char *arg);
bool register_field_in_read_map(unsigned char *arg);
void cleanup();
bool result_as_int64_t();
Item_equal *find_item_equal(COND_EQUAL *cond_equal);
bool subst_argument_checker(unsigned char **arg);
Item *equal_fields_propagator(unsigned char *arg);
bool set_no_const_sub(unsigned char *arg);
Item *replace_equal_field(unsigned char *arg);
uint32_t max_disp_length();
Item *safe_charset_converter(const CHARSET_INFO * const tocs);
int fix_outer_field(Session *session, Field **field, Item **reference);
virtual Item *update_value_transformer(unsigned char *select_arg);
virtual void print(String *str, enum_query_type query_type);
friend class Item_default_value;
friend class Item_insert_value;
friend class Select_Lex_Unit;
};
} /* namespace drizzled */
#endif /* DRIZZLED_ITEM_FIELD_H */
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