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Item_str_func(Item *a,Item *b,Item *c,Item *d) :Item_func(a,b,c,d) {decimals=NOT_FIXED_DEC; }
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Item_str_func(Item *a,Item *b,Item *c,Item *d, Item* e) :Item_func(a,b,c,d,e) {decimals=NOT_FIXED_DEC; }
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Item_str_func(List<Item> &list) :Item_func(list) {decimals=NOT_FIXED_DEC; }
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my_decimal *val_decimal(my_decimal *);
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enum Item_result result_type () const { return STRING_RESULT; }