diff options
Diffstat (limited to 'mysys/my_handler.c')
| -rw-r--r-- | mysys/my_handler.c | 135 |
1 files changed, 115 insertions, 20 deletions
diff --git a/mysys/my_handler.c b/mysys/my_handler.c index 1c3bb20426e..2b1c91a43e2 100644 --- a/mysys/my_handler.c +++ b/mysys/my_handler.c @@ -16,25 +16,30 @@ MA 02111-1307, USA */ #include <my_global.h> -#include "my_handler.h" +#include <m_ctype.h> +#include <my_base.h> +#include <my_handler.h> +#include <my_sys.h> -int mi_compare_text(CHARSET_INFO *charset_info, uchar *a, uint a_length, - uchar *b, uint b_length, my_bool part_key, +int ha_compare_text(CHARSET_INFO *charset_info, const uchar *a, uint a_length, + const uchar *b, uint b_length, my_bool part_key, my_bool skip_end_space) { if (!part_key) return charset_info->coll->strnncollsp(charset_info, a, a_length, - b, b_length, (my_bool)!skip_end_space); + b, b_length, + (my_bool)!skip_end_space); return charset_info->coll->strnncoll(charset_info, a, a_length, b, b_length, part_key); } -static int compare_bin(uchar *a, uint a_length, uchar *b, uint b_length, +static int compare_bin(const uchar *a, uint a_length, + const uchar *b, uint b_length, my_bool part_key, my_bool skip_end_space) { uint length= min(a_length,b_length); - uchar *end= a+ length; + const uchar *end= a+ length; int flag; while (a < end) @@ -113,8 +118,8 @@ static int compare_bin(uchar *a, uint a_length, uchar *b, uint b_length, #define FCMP(A,B) ((int) (A) - (int) (B)) -int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, - register uchar *b, uint key_length, uint nextflag, +int ha_key_cmp(register HA_KEYSEG *keyseg, register const uchar *a, + register const uchar *b, uint key_length, uint nextflag, uint *diff_pos) { int flag; @@ -124,12 +129,12 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, float f_1,f_2; double d_1,d_2; uint next_key_length; - uchar *orig_b= b; + const uchar *orig_b= b; *diff_pos=0; for ( ; (int) key_length >0 ; key_length=next_key_length, keyseg++) { - uchar *end; + const uchar *end; uint piks=! (keyseg->flag & HA_NO_SORT); (*diff_pos)++; diff_pos[1]= (uint)(b - orig_b); @@ -174,7 +179,7 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, next_key_length=key_length-b_length-pack_length; if (piks && - (flag=mi_compare_text(keyseg->charset,a,a_length,b,b_length, + (flag=ha_compare_text(keyseg->charset,a,a_length,b,b_length, (my_bool) ((nextflag & SEARCH_PREFIX) && next_key_length <= 0), (my_bool)!(nextflag & SEARCH_PREFIX)))) @@ -187,7 +192,7 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, { uint length=(uint) (end-a), a_length=length, b_length=length; if (piks && - (flag= mi_compare_text(keyseg->charset, a, a_length, b, b_length, + (flag= ha_compare_text(keyseg->charset, a, a_length, b, b_length, (my_bool) ((nextflag & SEARCH_PREFIX) && next_key_length <= 0), (my_bool)!(nextflag & SEARCH_PREFIX)))) @@ -235,7 +240,7 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, next_key_length=key_length-b_length-pack_length; if (piks && - (flag= mi_compare_text(keyseg->charset,a,a_length,b,b_length, + (flag= ha_compare_text(keyseg->charset,a,a_length,b,b_length, (my_bool) ((nextflag & SEARCH_PREFIX) && next_key_length <= 0), (my_bool) ((nextflag & (SEARCH_FIND | @@ -361,7 +366,7 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, if (keyseg->flag & HA_REVERSE_SORT) { - swap_variables(uchar*, a, b); + swap_variables(const uchar*, a, b); swap_flag=1; /* Remember swap of a & b */ end= a+ (int) (end-b); } @@ -386,7 +391,7 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, if (*b != '-') return -1; a++; b++; - swap_variables(uchar*, a, b); + swap_variables(const uchar*, a, b); swap_variables(int, alength, blength); swap_flag=1-swap_flag; alength--; blength--; @@ -415,7 +420,7 @@ int ha_key_cmp(register HA_KEYSEG *keyseg, register uchar *a, } if (swap_flag) /* Restore pointers */ - swap_variables(uchar*, a, b); + swap_variables(const uchar*, a, b); break; } #ifdef HAVE_LONG_LONG @@ -482,12 +487,15 @@ end: DESCRIPTION Find the first NULL value in index-suffix values tuple. - TODO Consider optimizing this fuction or its use so we don't search for - NULL values in completely NOT NULL index suffixes. + + TODO + Consider optimizing this function or its use so we don't search for + NULL values in completely NOT NULL index suffixes. RETURN - First key part that has NULL as value in values tuple, or the last key part - (with keyseg->type==HA_TYPE_END) if values tuple doesn't contain NULLs. + First key part that has NULL as value in values tuple, or the last key + part (with keyseg->type==HA_TYPE_END) if values tuple doesn't contain + NULLs. */ HA_KEYSEG *ha_find_null(HA_KEYSEG *keyseg, uchar *a) @@ -557,3 +565,90 @@ HA_KEYSEG *ha_find_null(HA_KEYSEG *keyseg, uchar *a) } return keyseg; } + + +/* + Errors a handler can give you +*/ + +static const char *handler_error_messages[]= +{ + "Didn't find key on read or update", + "Duplicate key on write or update", + "Undefined handler error 122", + "Someone has changed the row since it was read (while the table was locked to prevent it)", + "Wrong index given to function", + "Undefined handler error 125", + "Index file is crashed", + "Record file is crashed", + "Out of memory in engine", + "Undefined handler error 129", + "Incorrect file format", + "Command not supported by database", + "Old database file", + "No record read before update", + "Record was already deleted (or record file crashed)", + "No more room in record file", + "No more room in index file", + "No more records (read after end of file)", + "Unsupported extension used for table", + "Too big row", + "Wrong create options", + "Duplicate unique key or constraint on write or update", + "Unknown character set used in table", + "Conflicting table definitions in sub-tables of MERGE table", + "Table is crashed and last repair failed", + "Table was marked as crashed and should be repaired", + "Lock timed out; Retry transaction", + "Lock table is full; Restart program with a larger locktable", + "Updates are not allowed under a read only transactions", + "Lock deadlock; Retry transaction", + "Foreign key constraint is incorrectly formed", + "Cannot add a child row", + "Cannot delete a parent row", + "No savepoint with that name", + "Non unique key block size", + "The table does not exist in engine", + "The table already existed in storage engine", + "Could not connect to storage engine", + "Unexpected null pointer found when using spatial index", + "The table changed in storage engine", + "There's no partition in table for the given value", + "Row-based binlogging of row failed", + "Index needed in foreign key constraint", + "Upholding foreign key constraints would lead to a duplicate key error in " + "some other table", + "Table needs to be upgraded before it can be used", + "Table is read only", + "Failed to get next auto increment value", + "Failed to set row auto increment value", + "Unknown (generic) error from engine", + "Record is the same", + "It is not possible to log this statement", + "The table is of a new format not supported by this version", + "Got a fatal error during initialzaction of handler", + "File to short; Expected more data in file" +}; + + +/* + Register handler error messages for usage with my_error() + + NOTES + This is safe to call multiple times as my_error_register() + will ignore calls to register already registered error numbers. +*/ + + +void my_handler_error_register(void) +{ + my_error_register(handler_error_messages, HA_ERR_FIRST, + HA_ERR_FIRST+ array_elements(handler_error_messages)-1); +} + + +void my_handler_error_unregister(void) +{ + my_error_unregister(HA_ERR_FIRST, + HA_ERR_FIRST+ array_elements(handler_error_messages)-1); +} |