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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
*/
#include <config.h>
#include <drizzled/show.h>
#include <drizzled/table.h>
#include <drizzled/item/ident.h>
#include <cstdio>
using namespace std;
namespace drizzled
{
const uint32_t NO_CACHED_FIELD_INDEX= UINT32_MAX;
Item_ident::Item_ident(Name_resolution_context *context_arg,
const char *db_name_arg,const char *table_name_arg,
const char *field_name_arg)
:orig_db_name(db_name_arg), orig_table_name(table_name_arg),
orig_field_name(field_name_arg), context(context_arg),
db_name(db_name_arg), table_name(table_name_arg),
field_name(field_name_arg),
alias_name_used(false), cached_field_index(NO_CACHED_FIELD_INDEX),
cached_table(0), depended_from(0)
{
name = (char*) field_name_arg;
}
/**
Constructor used by Item_field & Item_*_ref (see Item comment)
*/
Item_ident::Item_ident(Session *session, Item_ident *item)
:Item(session, item),
orig_db_name(item->orig_db_name),
orig_table_name(item->orig_table_name),
orig_field_name(item->orig_field_name),
context(item->context),
db_name(item->db_name),
table_name(item->table_name),
field_name(item->field_name),
alias_name_used(item->alias_name_used),
cached_field_index(item->cached_field_index),
cached_table(item->cached_table),
depended_from(item->depended_from)
{}
void Item_ident::cleanup()
{
Item::cleanup();
db_name= orig_db_name;
table_name= orig_table_name;
field_name= orig_field_name;
depended_from= 0;
return;
}
bool Item_ident::remove_dependence_processor(unsigned char * arg)
{
if (depended_from == (Select_Lex *) arg)
depended_from= 0;
return(0);
}
const char *Item_ident::full_name() const
{
char *tmp;
size_t tmp_len;
if (!table_name || !field_name)
return field_name ? field_name : name ? name : "tmp_field";
if (db_name && db_name[0])
{
tmp_len= strlen(db_name)+strlen(table_name)+strlen(field_name)+3;
tmp= (char*) memory::sql_alloc(tmp_len);
snprintf(tmp, tmp_len, "%s.%s.%s",db_name,table_name,field_name);
}
else
{
if (table_name[0])
{
tmp_len=strlen(table_name)+strlen(field_name)+2;
tmp= (char*) memory::sql_alloc(tmp_len);
snprintf(tmp, tmp_len, "%s.%s", table_name, field_name);
}
else
tmp= (char*) field_name;
}
return tmp;
}
void Item_ident::print(String *str)
{
string d_name, t_name;
if (table_name && table_name[0])
{
t_name.assign(table_name);
std::transform(t_name.begin(), t_name.end(),
t_name.begin(), ::tolower);
}
if (db_name && db_name[0])
{
d_name.assign(db_name);
// Keeping the std:: prefix here, since Item_ident has a transform
// method
std::transform(d_name.begin(), d_name.end(),
d_name.begin(), ::tolower);
}
if (!table_name || !field_name || !field_name[0])
{
const char *nm= (field_name && field_name[0]) ?
field_name : name ? name : "tmp_field";
str->append_identifier(nm, (uint32_t) strlen(nm));
return;
}
if (db_name && db_name[0] && !alias_name_used)
{
{
str->append_identifier(d_name.c_str(), d_name.length());
str->append('.');
}
str->append_identifier(t_name.c_str(), t_name.length());
str->append('.');
str->append_identifier(field_name, (uint32_t)strlen(field_name));
}
else
{
if (table_name[0])
{
str->append_identifier(t_name.c_str(), t_name.length());
str->append('.');
str->append_identifier(field_name, (uint32_t) strlen(field_name));
}
else
str->append_identifier(field_name, (uint32_t) strlen(field_name));
}
}
double Item_ident_for_show::val_real()
{
return field->val_real();
}
int64_t Item_ident_for_show::val_int()
{
return field->val_int();
}
String *Item_ident_for_show::val_str(String *str)
{
return field->val_str_internal(str);
}
type::Decimal *Item_ident_for_show::val_decimal(type::Decimal *dec)
{
return field->val_decimal(dec);
}
void Item_ident_for_show::make_field(SendField *tmp_field)
{
tmp_field->table_name= tmp_field->org_table_name= table_name;
tmp_field->db_name= db_name;
tmp_field->col_name= tmp_field->org_col_name= field->field_name;
tmp_field->charsetnr= field->charset()->number;
tmp_field->length=field->field_length;
tmp_field->type=field->type();
tmp_field->flags= field->getTable()->maybe_null ?
(field->flags & ~NOT_NULL_FLAG) : field->flags;
tmp_field->decimals= field->decimals();
}
} /* namespace drizzled */
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