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/*
Copyright (c) 2002, 2011, 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 02110-1335 USA */
#include <my_global.h>
#include "sql_priv.h"
/*
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" // THD, set_var.h: THD
#include "set_var.h"
void Item_row::illegal_method_call(const char *method)
{
DBUG_ENTER("Item_row::illegal_method_call");
DBUG_PRINT("error", ("!!! %s method was called for row item", method));
DBUG_ASSERT(0);
my_error(ER_OPERAND_COLUMNS, MYF(0), 1);
DBUG_VOID_RETURN;
}
bool Item_row::fix_fields(THD *thd, Item **ref)
{
DBUG_ASSERT(fixed == 0);
null_value= 0;
maybe_null= 0;
Item **arg, **arg_end;
for (arg= args, arg_end= args + arg_count; arg != arg_end ; arg++)
{
if (!(*arg)->fixed &&
(*arg)->fix_fields(thd, arg))
return TRUE;
// we can't assign 'item' before, because fix_fields() can change arg
Item *item= *arg;
used_tables_cache |= item->used_tables();
const_item_cache&= item->const_item() && !with_null;
not_null_tables_cache|= item->not_null_tables();
if (const_item_cache)
{
if (item->cols() > 1)
with_null|= item->null_inside();
else
{
if (item->is_null())
with_null|= 1;
}
}
maybe_null|= item->maybe_null;
with_sum_func= with_sum_func || item->with_sum_func;
with_window_func = with_window_func || item->with_window_func;
with_field= with_field || item->with_field;
with_subselect|= item->with_subselect;
with_param|= item->with_param;
}
fixed= 1;
return FALSE;
}
bool
Item_row::eval_not_null_tables(void *opt_arg)
{
Item **arg,**arg_end;
not_null_tables_cache= 0;
if (arg_count)
{
for (arg= args, arg_end= args + arg_count; arg != arg_end ; arg++)
{
not_null_tables_cache|= (*arg)->not_null_tables();
}
}
return FALSE;
}
void Item_row::cleanup()
{
DBUG_ENTER("Item_row::cleanup");
Item::cleanup();
/* Reset to the original values */
used_tables_and_const_cache_init();
with_null= 0;
DBUG_VOID_RETURN;
}
void Item_row::split_sum_func(THD *thd, Ref_ptr_array ref_pointer_array,
List<Item> &fields, uint flags)
{
Item **arg, **arg_end;
for (arg= args, arg_end= args + arg_count; arg != arg_end ; arg++)
(*arg)->split_sum_func2(thd, ref_pointer_array, fields, arg,
flags | SPLIT_SUM_SKIP_REGISTERED);
}
void Item_row::fix_after_pullout(st_select_lex *new_parent, Item **ref,
bool merge)
{
used_tables_and_const_cache_init();
not_null_tables_cache= 0;
for (uint i= 0; i < arg_count; i++)
{
args[i]->fix_after_pullout(new_parent, &args[i], merge);
used_tables_and_const_cache_join(args[i]);
not_null_tables_cache|= args[i]->not_null_tables();
}
}
bool Item_row::check_cols(uint c)
{
if (c != arg_count)
{
my_error(ER_OPERAND_COLUMNS, MYF(0), c);
return 1;
}
return 0;
}
void Item_row::print(String *str, enum_query_type query_type)
{
str->append('(');
for (uint i= 0; i < arg_count; i++)
{
if (i)
str->append(',');
args[i]->print(str, query_type);
}
str->append(')');
}
Item *Item_row::transform(THD *thd, Item_transformer transformer, uchar *arg)
{
DBUG_ASSERT(!thd->stmt_arena->is_stmt_prepare());
if (transform_args(thd, transformer, arg))
return 0;
return (this->*transformer)(thd, arg);
}
void Item_row::bring_value()
{
for (uint i= 0; i < arg_count; i++)
args[i]->bring_value();
}
Item* Item_row::build_clone(THD *thd, MEM_ROOT *mem_root)
{
Item **copy_args= 0;
if (!(copy_args= (Item**) alloc_root(mem_root, sizeof(Item*) * arg_count)))
return 0;
for (uint i= 0; i < arg_count; i++)
{
Item *arg_clone= args[i]->build_clone(thd, mem_root);
if (!arg_clone)
return 0;
copy_args[i]= arg_clone;
}
Item_row *copy= (Item_row *) get_copy(thd, mem_root);
if (!copy)
return 0;
copy->args= copy_args;
return copy;
}
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