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int heap_rkey(HP_INFO *info, uchar *record, int inx, const uchar *key,
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key_part_map keypart_map, enum ha_rkey_function find_flag);
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extern uchar * heap_find(HP_INFO *info,int inx,const uchar *key);
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extern uchar *heap_position(HP_INFO *info);
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/* The following is for programs that uses the old HEAP interface where