irix-657m-src/eoe/cmd/sss/ssdb/ssdbserver/sql/item_timefunc.h

/* Copyright (C) 1979-1996 TcX AB & Monty Program KB & Detron HB

   This software is distributed with NO WARRANTY OF ANY KIND.  No author or
   distributor accepts any responsibility for the consequences of using it, or
   for whether it serves any particular purpose or works at all, unless he or
   she says so in writing.  Refer to the Free Public License (the "License")
   for full details.

   Every copy of this file must include a copy of the License, normally in a
   plain ASCII text file named PUBLIC.	The License grants you the right to
   copy, modify and redistribute this file, but only under certain conditions
   described in the License.  Among other things, the License requires that
   the copyright notice and this notice be preserved on all copies. */

/* Function items used by mysql */

#ifdef __GNUC__
#pragma interface			/* gcc class implementation */
#endif

class Item_func_period_add :public Item_int_func
{
public:
  Item_func_period_add(Item *a,Item *b) :Item_int_func(a,b) {}
  longlong val_int();
  const char *func_name() const { return "period_add"; }
  void fix_length_and_dec() { max_length=6; }
};


class Item_func_period_diff :public Item_int_func
{
public:
  Item_func_period_diff(Item *a,Item *b) :Item_int_func(a,b) {}
  longlong val_int();
  const char *func_name() const { return "period_diff"; }
  void fix_length_and_dec() { decimals=0; max_length=6; }
};


class Item_func_to_days :public Item_int_func
{
public:
  Item_func_to_days(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "to_days"; }
  void fix_length_and_dec() { decimals=0; max_length=6; }
};


class Item_func_dayofmonth :public Item_int_func
{
public:
  Item_func_dayofmonth(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "dayofmonth"; }
  void fix_length_and_dec() { decimals=0; max_length=2; maybe_null=1; }
};


class Item_func_month :public Item_func
{
public:
  Item_func_month(Item *a) :Item_func(a) {}
  longlong val_int();
  double val() { return (double) Item_func_month::val_int(); }
  String *str(String *str) { str->set(val_int()); return null_value ? 0 : str;}
  const char *func_name() const { return "month"; }
  enum Item_result result_type () const { return INT_RESULT; }
  void fix_length_and_dec() { decimals=0; max_length=2; maybe_null=1; }
};

class Item_func_monthname :public Item_func_month
{
public:
  Item_func_monthname(Item *a) :Item_func_month(a) {}
  const char *func_name() const { return "monthname"; }
  String *str(String *str);
  enum Item_result result_type () const { return STRING_RESULT; }
  void fix_length_and_dec() { decimals=0; max_length=10; maybe_null=1; }
};


class Item_func_dayofyear :public Item_int_func
{
public:
  Item_func_dayofyear(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "dayofyear"; }
  void fix_length_and_dec() { decimals=0; max_length=3; maybe_null=1; }
};


class Item_func_hour :public Item_int_func
{
public:
  Item_func_hour(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "hour"; }
  void fix_length_and_dec() { decimals=0; max_length=2; maybe_null=1; }
};


class Item_func_minute :public Item_int_func
{
public:
  Item_func_minute(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "minute"; }
  void fix_length_and_dec() { decimals=0; max_length=2; maybe_null=1; }
};


class Item_func_quarter :public Item_int_func
{
public:
  Item_func_quarter(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "quarter"; }
  void fix_length_and_dec() { decimals=0; max_length=1; maybe_null=1; }
};


class Item_func_second :public Item_int_func
{
public:
  Item_func_second(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "second"; }
  void fix_length_and_dec() { decimals=0; max_length=2; maybe_null=1; }
};


class Item_func_week :public Item_int_func
{
public:
  Item_func_week(Item *a,Item *b) :Item_int_func(a,b) {}
  longlong val_int();
  const char *func_name() const { return "week"; }
  void fix_length_and_dec() { decimals=0; max_length=2; maybe_null=1; }
};


class Item_func_year :public Item_int_func
{
public:
  Item_func_year(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "year"; }
  void fix_length_and_dec() { decimals=0; max_length=4; maybe_null=1; }
};


class Item_func_weekday :public Item_func
{
  bool odbc_type;
public:
  Item_func_weekday(Item *a,bool type) :Item_func(a), odbc_type(type) {}
  longlong val_int();
  double val() { return (double) val_int(); }
  String *str(String *str) { str->set(val_int()); return null_value ? 0 : str;}
  const char *func_name() const { return "weekday"; }
  enum Item_result result_type () const { return INT_RESULT; }
  void fix_length_and_dec() { decimals=0; max_length=1; maybe_null=1; }
};

class Item_func_dayname :public Item_func_weekday
{
 public:
  Item_func_dayname(Item *a) :Item_func_weekday(a,0) {}
  const char *func_name() const { return "dayname"; }
  String *str(String *str);
  enum Item_result result_type () const { return STRING_RESULT; }
  void fix_length_and_dec() { decimals=0; max_length=9; maybe_null=1; }
};


class Item_func_unix_timestamp :public Item_int_func
{
  String value;
public:
  Item_func_unix_timestamp() :Item_int_func() {}
  Item_func_unix_timestamp(Item *a) :Item_int_func(a) {}
  longlong val_int();
  const char *func_name() const { return "timestamp"; }
  void fix_length_and_dec()
  {
    decimals=0; max_length=10;
  }
};


class Item_func_time_to_sec :public Item_int_func
{
public:
  Item_func_time_to_sec(Item *item) :Item_int_func(item) {}
  longlong val_int();
  const char *func_name() const { return "time_to_sec"; }
  void fix_length_and_dec()
  {
    decimals=0; max_length=10;
  }
};


/* This can't be a Item_str_func, because the val() functions are special */

class Item_date :public Item_func
{
public:
  Item_date() :Item_func() {}
  Item_date(Item *a) :Item_func(a) {}
  enum Item_result result_type () const { return STRING_RESULT; }
  String *str(String *str);
  double val() { return (double) val_int(); }
  const char *func_name() const { return "date"; }
  void fix_length_and_dec() { decimals=0; max_length=10; }
};


class Item_func_curtime :public Item_func
{
  longlong value;
  char buff[9];
  uint buff_length;
public:
  Item_func_curtime() :Item_func() {}
  Item_func_curtime(Item *a) :Item_func(a) {}
  enum Item_result result_type () const { return STRING_RESULT; }
  double val() { return (double) value; }
  longlong val_int() { return value; }
  String *str(String *str) { str->set(buff,buff_length); return str; }
  const char *func_name() const { return "curtime"; }
  void fix_length_and_dec();
};


class Item_func_curdate :public Item_date
{
  longlong value;
public:
  Item_func_curdate() :Item_date() {}
  longlong val_int() { return (value) ; }
  const char *func_name() const { return "curdate"; }
  void fix_length_and_dec();			/* Retrieves curtime */
};


class Item_func_now :public Item_func
{
  longlong value;
  char buff[20];
  uint buff_length;
public:
  Item_func_now() :Item_func() {}
  Item_func_now(Item *a) :Item_func(a) {}
  enum Item_result result_type () const { return STRING_RESULT; }
  double val()	     { return (double) value; }
  longlong val_int() { return value; }
  String *str(String *str) { str->set(buff,buff_length); return str; }
  const char *func_name() const { return "now"; }
  void fix_length_and_dec();
};


class Item_func_from_days :public Item_date
{
public:
  Item_func_from_days(Item *a) :Item_date(a) {}
  longlong val_int();
  const char *func_name() const { return "from_days"; }
};


class Item_func_date_format :public Item_str_func
{
  int fixed_length;
  const bool date_or_time;
public:
  Item_func_date_format(Item *a,Item *b,bool date_or_time_arg)
    :Item_str_func(a,b),date_or_time(date_or_time_arg) {}
  String *str(String *str);
  const char *func_name() const { return "date_format"; }
  void fix_length_and_dec();
  uint format_length(const String *format);
};


class Item_func_from_unixtime :public Item_func
{
 public:
  Item_func_from_unixtime(Item *a) :Item_func(a) {}
  double val() { return (double) Item_func_from_unixtime::val_int(); }
  longlong val_int();
  String *str(String *str);
  const char *func_name() const { return "from_unixtime"; }
  void fix_length_and_dec() { decimals=0; max_length=19; }
  enum Item_result result_type () const { return STRING_RESULT; }
};


class Item_func_sec_to_time :public Item_str_func
{
public:
  Item_func_sec_to_time(Item *item) :Item_str_func(item) {}
  double val() { return (double) Item_func_sec_to_time::val_int(); }
  longlong val_int();
  String *str(String *);
  void fix_length_and_dec() { maybe_null=1; max_length=13; }
  const char *func_name() const { return "sec_to_time"; }
};

enum interval_type { INTERVAL_YEAR, INTERVAL_MONTH, INTERVAL_DAY,
		     INTERVAL_HOUR, INTERVAL_MINUTE, INTERVAL_SECOND,
		     INTERVAL_YEAR_MONTH, INTERVAL_DAY_HOUR,
		     INTERVAL_DAY_MINUTE, INTERVAL_DAY_SECOND,
		     INTERVAL_HOUR_MINUTE, INTERVAL_HOUR_SECOND,
		     INTERVAL_MINUTE_SECOND};

class Item_date_add_interval :public Item_str_func
{
  const bool neg;
  const interval_type int_type;
  String value;

public:
  Item_date_add_interval(Item *a,Item *b,interval_type type,bool neg_arg)
    :Item_str_func(a,b),int_type(type), neg(neg_arg) {}
  String *str(String *);
  const char *func_name() const { return "date_add_interval"; }
  void fix_length_and_dec() { maybe_null=1; max_length=19; value.alloc(32);}
};