mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
3bca8db4f9
- Part 4: Removing calls to sql_alloc() and sql_calloc() Other things: - Added current_thd in some places to make it clear that it's called (easier to remove later) - Move memory allocation from Item_func_case::fix_length_and_dec() to Item_func_case::fix_fields() - Added mem_root to some new calls - Fixed some wrong UNINIT_VAR() calls - Fixed a bug in generate_partition_syntax() in case of errors - Added mem_root to argument to new thread_info - Simplified my_parse_error() call in sql_yacc.yy
111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
#ifndef ITEM_ROW_INCLUDED
|
|
#define ITEM_ROW_INCLUDED
|
|
|
|
/*
|
|
Copyright (c) 2002, 2010, Oracle and/or its affiliates.
|
|
|
|
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 */
|
|
|
|
/**
|
|
Row items used for comparing rows and IN operations on rows:
|
|
|
|
@verbatim
|
|
(a, b, c) > (10, 10, 30)
|
|
(a, b, c) = (select c, d, e, from t1 where x=12)
|
|
(a, b, c) IN ((1,2,2), (3,4,5), (6,7,8)
|
|
(a, b, c) IN (select c, d, e, from t1)
|
|
@endverbatim
|
|
*/
|
|
|
|
class Item_row: public Item,
|
|
private Item_args,
|
|
private Used_tables_and_const_cache
|
|
{
|
|
table_map not_null_tables_cache;
|
|
bool with_null;
|
|
public:
|
|
Item_row(THD *thd, List<Item> &list):
|
|
Item(thd), Item_args(thd, list), not_null_tables_cache(0), with_null(0)
|
|
{ }
|
|
Item_row(THD *thd, Item_row *item):
|
|
Item(thd),
|
|
Item_args(item),
|
|
Used_tables_and_const_cache(item),
|
|
not_null_tables_cache(0),
|
|
with_null(0)
|
|
{}
|
|
|
|
enum Type type() const { return ROW_ITEM; };
|
|
void illegal_method_call(const char *);
|
|
bool is_null() { return null_value; }
|
|
void make_field(Send_field *)
|
|
{
|
|
illegal_method_call((const char*)"make_field");
|
|
};
|
|
double val_real()
|
|
{
|
|
illegal_method_call((const char*)"val");
|
|
return 0;
|
|
};
|
|
longlong val_int()
|
|
{
|
|
illegal_method_call((const char*)"val_int");
|
|
return 0;
|
|
};
|
|
String *val_str(String *)
|
|
{
|
|
illegal_method_call((const char*)"val_str");
|
|
return 0;
|
|
};
|
|
my_decimal *val_decimal(my_decimal *)
|
|
{
|
|
illegal_method_call((const char*)"val_decimal");
|
|
return 0;
|
|
};
|
|
bool fix_fields(THD *thd, Item **ref);
|
|
void fix_after_pullout(st_select_lex *new_parent, Item **ref);
|
|
void cleanup();
|
|
void split_sum_func(THD *thd, Item **ref_pointer_array, List<Item> &fields,
|
|
uint flags);
|
|
table_map used_tables() const { return used_tables_cache; };
|
|
bool const_item() const { return const_item_cache; };
|
|
enum Item_result result_type() const { return ROW_RESULT; }
|
|
Item_result cmp_type() const { return ROW_RESULT; }
|
|
void update_used_tables()
|
|
{
|
|
used_tables_and_const_cache_init();
|
|
used_tables_and_const_cache_update_and_join(arg_count, args);
|
|
}
|
|
table_map not_null_tables() const { return not_null_tables_cache; }
|
|
virtual void print(String *str, enum_query_type query_type);
|
|
|
|
bool walk(Item_processor processor, bool walk_subquery, uchar *arg)
|
|
{
|
|
if (walk_args(processor, walk_subquery, arg))
|
|
return true;
|
|
return (this->*processor)(arg);
|
|
}
|
|
Item *transform(THD *thd, Item_transformer transformer, uchar *arg);
|
|
bool eval_not_null_tables(uchar *opt_arg);
|
|
|
|
uint cols() { return arg_count; }
|
|
Item* element_index(uint i) { return args[i]; }
|
|
Item** addr(uint i) { return args + i; }
|
|
bool check_cols(uint c);
|
|
bool null_inside() { return with_null; };
|
|
void bring_value();
|
|
bool check_vcol_func_processor(uchar *int_arg) {return FALSE; }
|
|
};
|
|
|
|
#endif /* ITEM_ROW_INCLUDED */
|