/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* 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; maybe_null=1; } }; 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 *val_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 *val_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_yearweek :public Item_int_func { public: Item_func_yearweek(Item *a,Item *b) :Item_int_func(a,b) {} longlong val_int(); const char *func_name() const { return "yearweek"; } void fix_length_and_dec() { decimals=0; max_length=6; 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_arg) :Item_func(a), odbc_type(type_arg) {} longlong val_int(); double val() { return (double) val_int(); } String *val_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 *val_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 *val_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; } int save_in_field(Field *to); void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_DATE); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_date(maybe_null, name, t_arg); } }; class Item_date_func :public Item_str_func { public: Item_date_func() :Item_str_func() {} Item_date_func(Item *a) :Item_str_func(a) {} Item_date_func(Item *a,Item *b) :Item_str_func(a,b) {} void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_DATETIME); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_datetime(maybe_null, name, t_arg); } }; 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 *val_str(String *str) { str_value.set(buff,buff_length,default_charset_info); return &str_value; } const char *func_name() const { return "curtime"; } void fix_length_and_dec(); void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_TIME); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_time(maybe_null, name, t_arg); } }; class Item_func_curdate :public Item_date { longlong value; TIME ltime; 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 */ bool get_date(TIME *res,bool fuzzy_date); }; class Item_func_now :public Item_date_func { longlong value; char buff[20]; uint buff_length; TIME ltime; public: Item_func_now() :Item_date_func() {} Item_func_now(Item *a) :Item_date_func(a) {} enum Item_result result_type () const { return STRING_RESULT; } double val() { return (double) value; } longlong val_int() { return value; } int save_in_field(Field *to); String *val_str(String *str) { str_value.set(buff,buff_length,default_charset_info); return &str_value; } const char *func_name() const { return "now"; } void fix_length_and_dec(); bool get_date(TIME *res,bool fuzzy_date); }; 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; String value; 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 *val_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_date_func { public: Item_func_from_unixtime(Item *a) :Item_date_func(a) {} double val() { return (double) Item_func_from_unixtime::val_int(); } longlong val_int(); String *val_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; } bool get_date(TIME *res,bool fuzzy_date); }; 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 *val_str(String *); void fix_length_and_dec() { maybe_null=1; max_length=13; } const char *func_name() const { return "sec_to_time"; } void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_TIME); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_time(maybe_null, name, t_arg); } }; 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_date_func { const interval_type int_type; String value; const bool date_sub_interval; public: Item_date_add_interval(Item *a,Item *b,interval_type type_arg,bool neg_arg) :Item_date_func(a,b),int_type(type_arg), date_sub_interval(neg_arg) {} String *val_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);} double val() { return (double) val_int(); } longlong val_int(); bool get_date(TIME *res,bool fuzzy_date); }; class Item_extract :public Item_int_func { const interval_type int_type; String value; bool date_value; public: Item_extract(interval_type type_arg, Item *a) :Item_int_func(a), int_type(type_arg) {} longlong val_int(); const char *func_name() const { return "extract"; } void fix_length_and_dec(); }; class Item_typecast :public Item_str_func { public: Item_typecast(Item *a) :Item_str_func(a) {} String *val_str(String *a) { a=args[0]->val_str(a); null_value=args[0]->null_value; return a; } void fix_length_and_dec() { max_length=args[0]->max_length; } void print(String *str); }; class Item_date_typecast :public Item_typecast { public: Item_date_typecast(Item *a) :Item_typecast(a) {} const char *func_name() const { return "date"; } void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_DATE); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_date(maybe_null, name, t_arg); } }; class Item_time_typecast :public Item_typecast { public: Item_time_typecast(Item *a) :Item_typecast(a) {} const char *func_name() const { return "time"; } void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_TIME); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_time(maybe_null, name, t_arg); } }; class Item_datetime_typecast :public Item_typecast { public: Item_datetime_typecast(Item *a) :Item_typecast(a) {} const char *func_name() const { return "datetime"; } void make_field(Send_field *tmp_field) { init_make_field(tmp_field,FIELD_TYPE_DATETIME); } Field *tmp_table_field(TABLE *t_arg) { if (!t_arg) return result_field; return new Field_datetime(maybe_null, name, t_arg); } };