diff options
Diffstat (limited to 'include/my_compare.h')
| -rw-r--r-- | include/my_compare.h | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/include/my_compare.h b/include/my_compare.h index 363d46b8162..53e5aa94c3c 100644 --- a/include/my_compare.h +++ b/include/my_compare.h @@ -40,7 +40,7 @@ extern "C" { */ #define HA_MAX_KEY_LENGTH 1000 /* Max length in bytes */ -#define HA_MAX_KEY_SEG 16 /* Max segments for key */ +#define HA_MAX_KEY_SEG 32 /* Max segments for key */ #define HA_MAX_POSSIBLE_KEY_BUFF (HA_MAX_KEY_LENGTH + 24+ 6+6) #define HA_MAX_KEY_BUFF (HA_MAX_KEY_LENGTH+HA_MAX_KEY_SEG*6+8+8) @@ -106,10 +106,10 @@ typedef struct st_HA_KEYSEG /* Key-portion */ #define clr_rec_bits(bit_ptr, bit_ofs, bit_len) \ set_rec_bits(0, bit_ptr, bit_ofs, bit_len) -extern int ha_compare_text(CHARSET_INFO *, uchar *, uint, uchar *, uint , - my_bool, my_bool); -extern int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, - register uchar *b, uint key_length, uint nextflag, +extern int ha_compare_text(CHARSET_INFO *, const uchar *, uint, + const uchar *, uint , my_bool, my_bool); +extern int ha_key_cmp(HA_KEYSEG *keyseg, const uchar *a, + const uchar *b, uint key_length, uint nextflag, uint *diff_pos); extern HA_KEYSEG *ha_find_null(HA_KEYSEG *keyseg, const uchar *a); @@ -123,4 +123,28 @@ extern HA_KEYSEG *ha_find_null(HA_KEYSEG *keyseg, const uchar *a); } #endif +/** + Return values of index_cond_func_xxx functions. + + 0=ICP_NO_MATCH - index tuple doesn't satisfy the pushed index condition (the + engine should discard the tuple and go to the next one) + 1=ICP_MATCH - index tuple satisfies the pushed index condition (the + engine should fetch and return the record) + 2=ICP_OUT_OF_RANGE - index tuple is out range that we're scanning, e.g. this + if we're scanning "t.key BETWEEN 10 AND 20" and got a + "t.key=21" tuple (the engine should stop scanning and + return HA_ERR_END_OF_FILE right away). + -1= ICP_ERROR - Reserved for internal errors in engines. Should not be + returned by index_cond_func_xxx +*/ + +typedef enum icp_result { + ICP_ERROR=-1, + ICP_NO_MATCH=0, + ICP_MATCH=1, + ICP_OUT_OF_RANGE=2 +} ICP_RESULT; + +typedef ICP_RESULT (*index_cond_func_t)(void *param); + #endif /* _my_compare_h */ |