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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 MySQL
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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 DRIZZLE_SERVER_FIELD_NEW_DECIMAL
#define DRIZZLE_SERVER_FIELD_NEW_DECIMAL
/* New decimal/numeric field which use fixed point arithmetic */
class Field_new_decimal :public Field_num {
private:
int do_save_field_metadata(uchar *first_byte);
public:
/* The maximum number of decimal digits can be stored */
uint precision;
uint bin_size;
/*
Constructors take max_length of the field as a parameter - not the
precision as the number of decimal digits allowed.
So for example we need to count length from precision handling
CREATE TABLE ( DECIMAL(x,y))
*/
Field_new_decimal(uchar *ptr_arg, uint32_t len_arg, uchar *null_ptr_arg,
uchar null_bit_arg,
enum utype unireg_check_arg, const char *field_name_arg,
uint8_t dec_arg, bool zero_arg, bool unsigned_arg);
Field_new_decimal(uint32_t len_arg, bool maybe_null_arg,
const char *field_name_arg, uint8_t dec_arg,
bool unsigned_arg);
enum_field_types type() const { return DRIZZLE_TYPE_NEWDECIMAL;}
enum ha_base_keytype key_type() const { return HA_KEYTYPE_BINARY; }
Item_result result_type () const { return DECIMAL_RESULT; }
int reset(void);
bool store_value(const my_decimal *decimal_value);
void set_value_on_overflow(my_decimal *decimal_value, bool sign);
int store(const char *to, uint length, const CHARSET_INFO * const charset);
int store(double nr);
int store(int64_t nr, bool unsigned_val);
int store_time(DRIZZLE_TIME *ltime, timestamp_type t_type);
int store_decimal(const my_decimal *);
double val_real(void);
int64_t val_int(void);
my_decimal *val_decimal(my_decimal *);
String *val_str(String*, String *);
int cmp(const uchar *, const uchar *);
void sort_string(uchar *buff, uint length);
bool zero_pack() const { return 0; }
void sql_type(String &str) const;
uint32_t max_display_length() { return field_length; }
uint size_of() const { return sizeof(*this); }
uint32_t pack_length() const { return (uint32_t) bin_size; }
uint pack_length_from_metadata(uint field_metadata);
uint row_pack_length() { return pack_length(); }
int compatible_field_size(uint field_metadata);
uint is_equal(Create_field *new_field);
virtual const uchar *unpack(uchar* to, const uchar *from,
uint param_data, bool low_byte_first);
};
#endif
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