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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
*
* 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 <drizzled/server_includes.h>
#include CSTDINT_H
#include <drizzled/function/time/to_days.h>
int64_t Item_func_to_days::val_int()
{
assert(fixed == 1);
DRIZZLE_TIME ltime;
if (get_arg0_date(<ime, TIME_NO_ZERO_DATE))
return 0;
return (int64_t) calc_daynr(ltime.year,ltime.month,ltime.day);
}
/*
Get information about this Item tree monotonicity
SYNOPSIS
Item_func_to_days::get_monotonicity_info()
DESCRIPTION
Get information about monotonicity of the function represented by this item
tree.
RETURN
See enum_monotonicity_info.
*/
enum_monotonicity_info Item_func_to_days::get_monotonicity_info() const
{
if (args[0]->type() == Item::FIELD_ITEM)
{
if (args[0]->field_type() == DRIZZLE_TYPE_DATE)
return MONOTONIC_STRICT_INCREASING;
if (args[0]->field_type() == DRIZZLE_TYPE_DATETIME)
return MONOTONIC_INCREASING;
}
return NON_MONOTONIC;
}
int64_t Item_func_to_days::val_int_endpoint(bool left_endp, bool *incl_endp)
{
assert(fixed == 1);
DRIZZLE_TIME ltime;
int64_t res;
if (get_arg0_date(<ime, TIME_NO_ZERO_DATE))
{
/* got NULL, leave the incl_endp intact */
return INT64_MIN;
}
res=(int64_t) calc_daynr(ltime.year,ltime.month,ltime.day);
if (args[0]->field_type() == DRIZZLE_TYPE_DATE)
{
// TO_DAYS() is strictly monotonic for dates, leave incl_endp intact
return res;
}
/*
Handle the special but practically useful case of datetime values that
point to day bound ("strictly less" comparison stays intact):
col < '2007-09-15 00:00:00' -> TO_DAYS(col) < TO_DAYS('2007-09-15')
which is different from the general case ("strictly less" changes to
"less or equal"):
col < '2007-09-15 12:34:56' -> TO_DAYS(col) <= TO_DAYS('2007-09-15')
*/
if (!left_endp && !(ltime.hour || ltime.minute || ltime.second ||
ltime.second_part))
; /* do nothing */
else
*incl_endp= true;
return res;
}
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