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#define clr_rec_bits(bit_ptr, bit_ofs, bit_len) \
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set_rec_bits(0, bit_ptr, bit_ofs, bit_len)
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extern int ha_compare_text(const CHARSET_INFO * const, unsigned char *, uint, unsigned char *, uint, bool, bool);
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extern int ha_compare_text(const drizzled::charset_info_st * const, unsigned char *, uint, unsigned char *, uint, bool, bool);
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extern HA_KEYSEG *ha_find_null(HA_KEYSEG *keyseg, unsigned char *a);
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void my_handler_error_register(void);
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extern int ha_key_cmp(HA_KEYSEG *keyseg, unsigned char *a,unsigned char *b,
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uint32_t key_length,uint32_t nextflag,uint32_t *diff_length);