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class Item_func_insert :public Item_str_func
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Item_str_func(org,start,length,new_str),
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Item_func_insert(Item *org,Item *start,Item *length,Item *new_str)
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:Item_str_func(org,start,length,new_str) {}
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String *val_str(String *);
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void fix_length_and_dec();
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const char *func_name() const { return "insert"; }