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UNIV_INTERN const char* index_type(uint key_number);
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UNIV_INTERN const key_map* keys_to_use_for_scanning();
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UNIV_INTERN int doOpen(const drizzled::identifier::Table &identifier, int mode, uint test_if_locked);
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UNIV_INTERN int close(void);
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UNIV_INTERN double scan_time();
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UNIV_INTERN double read_time(uint index, uint ranges, ha_rows rows);