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Commit 5f08a831 authored by istruewing@chilla.local's avatar istruewing@chilla.local
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Bug#8283 - OPTIMIZE TABLE causes data loss 

OPTIMIZE TABLE with myisam_repair_threads > 1 performs a non-quick 
parallel repair. This means that it does not only rebuild all 
indexes, but also the data file.

Non-quick parallel repair works so that there is one thread per 
index. The first of the threads rebuilds also the new data file.

The problem was that all threads shared the read io cache on the
old data file. If there were holes (deleted records) in the table,
the first thread skipped them, writing only contiguous, non-deleted
records to the new data file. Then it built the new index so that
its entries pointed to the correct record positions. But the other
threads didn't know the new record positions, but put the positions
from the old data file into the index.

The new design is so that there is a shared io cache which is filled
by the first thread (the data file writer) with the new contiguous
records and read by the other threads. Now they know the new record
positions.

Another problem was that for the parallel repair of compressed
tables a common bit_buff and rec_buff was used. I changed it so
that thread specific buffers are used for parallel repair.

A similar problem existed for checksum calculation. I made this
multi-thread safe too.
parent fadbdf27
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Showing with 1134 additions and 234 deletions
include/my_sys.h
View file @ 5f08a831
...@@ -325,12 +325,18 @@ typedef int (*IO_CACHE_CALLBACK)(struct st_io_cache*); ...@@ -325,12 +325,18 @@ typedef int (*IO_CACHE_CALLBACK)(struct st_io_cache*);
#ifdef THREAD #ifdef THREAD
typedef struct st_io_cache_share typedef struct st_io_cache_share
{ {
/* to sync on reads into buffer */ pthread_mutex_t mutex; /* To sync on reads into buffer. */
pthread_mutex_t mutex; pthread_cond_t cond; /* To wait for signals. */
pthread_cond_t cond; pthread_cond_t cond_writer; /* For a synchronized writer. */
int count, total; /* Offset in file corresponding to the first byte of buffer. */
/* actual IO_CACHE that filled the buffer */ my_off_t pos_in_file;
struct st_io_cache *active; /* If a synchronized write cache is the source of the data. */
struct st_io_cache *source_cache;
byte *buffer; /* The read buffer. */
byte *read_end; /* Behind last valid byte of buffer. */
int running_threads; /* threads not in lock. */
int total_threads; /* threads sharing the cache. */
int error; /* Last error. */
#ifdef NOT_YET_IMPLEMENTED #ifdef NOT_YET_IMPLEMENTED
/* whether the structure should be free'd */ /* whether the structure should be free'd */
my_bool alloced; my_bool alloced;
...@@ -672,8 +678,8 @@ extern void setup_io_cache(IO_CACHE* info); ...@@ -672,8 +678,8 @@ extern void setup_io_cache(IO_CACHE* info);
extern int _my_b_read(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_read(IO_CACHE *info,byte *Buffer,uint Count);
#ifdef THREAD #ifdef THREAD
extern int _my_b_read_r(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_read_r(IO_CACHE *info,byte *Buffer,uint Count);
extern void init_io_cache_share(IO_CACHE *info, extern void init_io_cache_share(IO_CACHE *read_cache, IO_CACHE_SHARE *cshare,
IO_CACHE_SHARE *s, uint num_threads); IO_CACHE *write_cache, uint num_threads);
extern void remove_io_thread(IO_CACHE *info); extern void remove_io_thread(IO_CACHE *info);
#endif #endif
extern int _my_b_seq_read(IO_CACHE *info,byte *Buffer,uint Count); extern int _my_b_seq_read(IO_CACHE *info,byte *Buffer,uint Count);
......
include/myisam.h
View file @ 5f08a831
...@@ -345,7 +345,7 @@ typedef struct st_mi_check_param ...@@ -345,7 +345,7 @@ typedef struct st_mi_check_param
uint testflag, key_cache_block_size; uint testflag, key_cache_block_size;
uint8 language; uint8 language;
my_bool using_global_keycache, opt_lock_memory, opt_follow_links; my_bool using_global_keycache, opt_lock_memory, opt_follow_links;
my_bool retry_repair, force_sort, calc_checksum; my_bool retry_repair, force_sort;
char temp_filename[FN_REFLEN],*isam_file_name; char temp_filename[FN_REFLEN],*isam_file_name;
MY_TMPDIR *tmpdir; MY_TMPDIR *tmpdir;
int tmpfile_createflag; int tmpfile_createflag;
......
myisam/mi_check.c
View file @ 5f08a831
This diff is collapsed.
myisam/mi_open.c
View file @ 5f08a831
...@@ -201,7 +201,10 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags) ...@@ -201,7 +201,10 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
((open_flags & HA_OPEN_ABORT_IF_CRASHED) && ((open_flags & HA_OPEN_ABORT_IF_CRASHED) &&
(my_disable_locking && share->state.open_count)))) (my_disable_locking && share->state.open_count))))
{ {
DBUG_PRINT("error",("Table is marked as crashed")); DBUG_PRINT("error",("Table is marked as crashed. open_flags: %u "
"changed: %u open_count: %u !locking: %d",
open_flags, share->state.changed,
share->state.open_count, my_disable_locking));
my_errno=((share->state.changed & STATE_CRASHED_ON_REPAIR) ? my_errno=((share->state.changed & STATE_CRASHED_ON_REPAIR) ?
HA_ERR_CRASHED_ON_REPAIR : HA_ERR_CRASHED_ON_USAGE); HA_ERR_CRASHED_ON_REPAIR : HA_ERR_CRASHED_ON_USAGE);
goto err; goto err;
......
myisam/mi_packrec.c
View file @ 5f08a831
...@@ -101,7 +101,8 @@ static uint fill_and_get_bits(MI_BIT_BUFF *bit_buff,uint count); ...@@ -101,7 +101,8 @@ static uint fill_and_get_bits(MI_BIT_BUFF *bit_buff,uint count);
static void fill_buffer(MI_BIT_BUFF *bit_buff); static void fill_buffer(MI_BIT_BUFF *bit_buff);
static uint max_bit(uint value); static uint max_bit(uint value);
#ifdef HAVE_MMAP #ifdef HAVE_MMAP
static uchar *_mi_mempack_get_block_info(MI_INFO *myisam,MI_BLOCK_INFO *info, static uchar *_mi_mempack_get_block_info(MI_INFO *myisam, MI_BIT_BUFF *bit_buff,
MI_BLOCK_INFO *info, byte **rec_buff_p,
uchar *header); uchar *header);
#endif #endif
...@@ -428,13 +429,15 @@ int _mi_read_pack_record(MI_INFO *info, my_off_t filepos, byte *buf) ...@@ -428,13 +429,15 @@ int _mi_read_pack_record(MI_INFO *info, my_off_t filepos, byte *buf)
DBUG_RETURN(-1); /* _search() didn't find record */ DBUG_RETURN(-1); /* _search() didn't find record */
file=info->dfile; file=info->dfile;
if (_mi_pack_get_block_info(info, &block_info, file, filepos)) if (_mi_pack_get_block_info(info, &info->bit_buff, &block_info,
&info->rec_buff, file, filepos))
goto err; goto err;
if (my_read(file,(byte*) info->rec_buff + block_info.offset , if (my_read(file,(byte*) info->rec_buff + block_info.offset ,
block_info.rec_len - block_info.offset, MYF(MY_NABP))) block_info.rec_len - block_info.offset, MYF(MY_NABP)))
goto panic; goto panic;
info->update|= HA_STATE_AKTIV; info->update|= HA_STATE_AKTIV;
DBUG_RETURN(_mi_pack_rec_unpack(info,buf,info->rec_buff,block_info.rec_len)); DBUG_RETURN(_mi_pack_rec_unpack(info, &info->bit_buff, buf,
info->rec_buff, block_info.rec_len));
panic: panic:
my_errno=HA_ERR_WRONG_IN_RECORD; my_errno=HA_ERR_WRONG_IN_RECORD;
err: err:
...@@ -443,8 +446,8 @@ err: ...@@ -443,8 +446,8 @@ err:
int _mi_pack_rec_unpack(register MI_INFO *info, register byte *to, byte *from, int _mi_pack_rec_unpack(register MI_INFO *info, MI_BIT_BUFF *bit_buff,
ulong reclength) register byte *to, byte *from, ulong reclength)
{ {
byte *end_field; byte *end_field;
reg3 MI_COLUMNDEF *end; reg3 MI_COLUMNDEF *end;
...@@ -452,18 +455,18 @@ int _mi_pack_rec_unpack(register MI_INFO *info, register byte *to, byte *from, ...@@ -452,18 +455,18 @@ int _mi_pack_rec_unpack(register MI_INFO *info, register byte *to, byte *from,
MYISAM_SHARE *share=info->s; MYISAM_SHARE *share=info->s;
DBUG_ENTER("_mi_pack_rec_unpack"); DBUG_ENTER("_mi_pack_rec_unpack");
init_bit_buffer(&info->bit_buff, (uchar*) from,reclength); init_bit_buffer(bit_buff, (uchar*) from, reclength);
for (current_field=share->rec, end=current_field+share->base.fields ; for (current_field=share->rec, end=current_field+share->base.fields ;
current_field < end ; current_field < end ;
current_field++,to=end_field) current_field++,to=end_field)
{ {
end_field=to+current_field->length; end_field=to+current_field->length;
(*current_field->unpack)(current_field,&info->bit_buff,(uchar*) to, (*current_field->unpack)(current_field, bit_buff, (uchar*) to,
(uchar*) end_field); (uchar*) end_field);
} }
if (! info->bit_buff.error && if (!bit_buff->error &&
info->bit_buff.pos - info->bit_buff.bits/8 == info->bit_buff.end) bit_buff->pos - bit_buff->bits / 8 == bit_buff->end)
DBUG_RETURN(0); DBUG_RETURN(0);
info->update&= ~HA_STATE_AKTIV; info->update&= ~HA_STATE_AKTIV;
DBUG_RETURN(my_errno=HA_ERR_WRONG_IN_RECORD); DBUG_RETURN(my_errno=HA_ERR_WRONG_IN_RECORD);
...@@ -977,13 +980,16 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf, ...@@ -977,13 +980,16 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf,
if (info->opt_flag & READ_CACHE_USED) if (info->opt_flag & READ_CACHE_USED)
{ {
if (_mi_read_cache(&info->rec_cache,(byte*) block_info.header,filepos, if (_mi_read_cache(&info->rec_cache, (byte*) block_info.header,
share->pack.ref_length, skip_deleted_blocks)) filepos, share->pack.ref_length,
skip_deleted_blocks ? READING_NEXT : 0))
goto err; goto err;
b_type=_mi_pack_get_block_info(info,&block_info,-1, filepos); b_type=_mi_pack_get_block_info(info, &info->bit_buff, &block_info,
&info->rec_buff, -1, filepos);
} }
else else
b_type=_mi_pack_get_block_info(info,&block_info,info->dfile,filepos); b_type=_mi_pack_get_block_info(info, &info->bit_buff, &block_info,
&info->rec_buff, info->dfile, filepos);
if (b_type) if (b_type)
goto err; /* Error code is already set */ goto err; /* Error code is already set */
#ifndef DBUG_OFF #ifndef DBUG_OFF
...@@ -996,9 +1002,9 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf, ...@@ -996,9 +1002,9 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf,
if (info->opt_flag & READ_CACHE_USED) if (info->opt_flag & READ_CACHE_USED)
{ {
if (_mi_read_cache(&info->rec_cache,(byte*) info->rec_buff, if (_mi_read_cache(&info->rec_cache, (byte*) info->rec_buff,
block_info.filepos, block_info.rec_len, block_info.filepos, block_info.rec_len,
skip_deleted_blocks)) skip_deleted_blocks ? READING_NEXT : 0))
goto err; goto err;
} }
else else
...@@ -1013,8 +1019,8 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf, ...@@ -1013,8 +1019,8 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf,
info->nextpos=block_info.filepos+block_info.rec_len; info->nextpos=block_info.filepos+block_info.rec_len;
info->update|= HA_STATE_AKTIV | HA_STATE_KEY_CHANGED; info->update|= HA_STATE_AKTIV | HA_STATE_KEY_CHANGED;
DBUG_RETURN (_mi_pack_rec_unpack(info,buf,info->rec_buff, DBUG_RETURN (_mi_pack_rec_unpack(info, &info->bit_buff, buf,
block_info.rec_len)); info->rec_buff, block_info.rec_len));
err: err:
DBUG_RETURN(my_errno); DBUG_RETURN(my_errno);
} }
...@@ -1022,8 +1028,9 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf, ...@@ -1022,8 +1028,9 @@ int _mi_read_rnd_pack_record(MI_INFO *info, byte *buf,
/* Read and process header from a huff-record-file */ /* Read and process header from a huff-record-file */
uint _mi_pack_get_block_info(MI_INFO *myisam, MI_BLOCK_INFO *info, File file, uint _mi_pack_get_block_info(MI_INFO *myisam, MI_BIT_BUFF *bit_buff,
my_off_t filepos) MI_BLOCK_INFO *info, byte **rec_buff_p,
File file, my_off_t filepos)
{ {
uchar *header=info->header; uchar *header=info->header;
uint head_length,ref_length; uint head_length,ref_length;
...@@ -1048,17 +1055,17 @@ uint _mi_pack_get_block_info(MI_INFO *myisam, MI_BLOCK_INFO *info, File file, ...@@ -1048,17 +1055,17 @@ uint _mi_pack_get_block_info(MI_INFO *myisam, MI_BLOCK_INFO *info, File file,
head_length+= read_pack_length((uint) myisam->s->pack.version, head_length+= read_pack_length((uint) myisam->s->pack.version,
header + head_length, &info->blob_len); header + head_length, &info->blob_len);
if (!(mi_alloc_rec_buff(myisam,info->rec_len + info->blob_len, if (!(mi_alloc_rec_buff(myisam,info->rec_len + info->blob_len,
&myisam->rec_buff))) rec_buff_p)))
return BLOCK_FATAL_ERROR; /* not enough memory */ return BLOCK_FATAL_ERROR; /* not enough memory */
myisam->bit_buff.blob_pos=(uchar*) myisam->rec_buff+info->rec_len; bit_buff->blob_pos= (uchar*) *rec_buff_p + info->rec_len;
myisam->bit_buff.blob_end= myisam->bit_buff.blob_pos+info->blob_len; bit_buff->blob_end= bit_buff->blob_pos + info->blob_len;
myisam->blob_length=info->blob_len; myisam->blob_length=info->blob_len;
} }
info->filepos=filepos+head_length; info->filepos=filepos+head_length;
if (file > 0) if (file > 0)
{ {
info->offset=min(info->rec_len, ref_length - head_length); info->offset=min(info->rec_len, ref_length - head_length);
memcpy(myisam->rec_buff, header+head_length, info->offset); memcpy(*rec_buff_p, header + head_length, info->offset);
} }
return 0; return 0;
} }
...@@ -1198,7 +1205,8 @@ void _mi_unmap_file(MI_INFO *info) ...@@ -1198,7 +1205,8 @@ void _mi_unmap_file(MI_INFO *info)
} }
static uchar *_mi_mempack_get_block_info(MI_INFO *myisam,MI_BLOCK_INFO *info, static uchar *_mi_mempack_get_block_info(MI_INFO *myisam, MI_BIT_BUFF *bit_buff,
MI_BLOCK_INFO *info, byte **rec_buff_p,
uchar *header) uchar *header)
{ {
header+= read_pack_length((uint) myisam->s->pack.version, header, header+= read_pack_length((uint) myisam->s->pack.version, header,
...@@ -1209,10 +1217,10 @@ static uchar *_mi_mempack_get_block_info(MI_INFO *myisam,MI_BLOCK_INFO *info, ...@@ -1209,10 +1217,10 @@ static uchar *_mi_mempack_get_block_info(MI_INFO *myisam,MI_BLOCK_INFO *info,
&info->blob_len); &info->blob_len);
/* mi_alloc_rec_buff sets my_errno on error */ /* mi_alloc_rec_buff sets my_errno on error */
if (!(mi_alloc_rec_buff(myisam, info->blob_len, if (!(mi_alloc_rec_buff(myisam, info->blob_len,
&myisam->rec_buff))) rec_buff_p)))
return 0; /* not enough memory */ return 0; /* not enough memory */
myisam->bit_buff.blob_pos=(uchar*) myisam->rec_buff; bit_buff->blob_pos= (uchar*) *rec_buff_p;
myisam->bit_buff.blob_end= (uchar*) myisam->rec_buff + info->blob_len; bit_buff->blob_end= (uchar*) *rec_buff_p + info->blob_len;
} }
return header; return header;
} }
...@@ -1228,11 +1236,13 @@ static int _mi_read_mempack_record(MI_INFO *info, my_off_t filepos, byte *buf) ...@@ -1228,11 +1236,13 @@ static int _mi_read_mempack_record(MI_INFO *info, my_off_t filepos, byte *buf)
if (filepos == HA_OFFSET_ERROR) if (filepos == HA_OFFSET_ERROR)
DBUG_RETURN(-1); /* _search() didn't find record */ DBUG_RETURN(-1); /* _search() didn't find record */
if (!(pos= (byte*) _mi_mempack_get_block_info(info,&block_info, if (!(pos= (byte*) _mi_mempack_get_block_info(info, &info->bit_buff,
&block_info, &info->rec_buff,
(uchar*) share->file_map+ (uchar*) share->file_map+
filepos))) filepos)))
DBUG_RETURN(-1); DBUG_RETURN(-1);
DBUG_RETURN(_mi_pack_rec_unpack(info, buf, pos, block_info.rec_len)); DBUG_RETURN(_mi_pack_rec_unpack(info, &info->bit_buff, buf,
pos, block_info.rec_len));
} }
...@@ -1252,7 +1262,8 @@ static int _mi_read_rnd_mempack_record(MI_INFO *info, byte *buf, ...@@ -1252,7 +1262,8 @@ static int _mi_read_rnd_mempack_record(MI_INFO *info, byte *buf,
my_errno=HA_ERR_END_OF_FILE; my_errno=HA_ERR_END_OF_FILE;
goto err; goto err;
} }
if (!(pos= (byte*) _mi_mempack_get_block_info(info,&block_info, if (!(pos= (byte*) _mi_mempack_get_block_info(info, &info->bit_buff,
&block_info, &info->rec_buff,
(uchar*) (uchar*)
(start=share->file_map+ (start=share->file_map+
filepos)))) filepos))))
...@@ -1269,7 +1280,8 @@ static int _mi_read_rnd_mempack_record(MI_INFO *info, byte *buf, ...@@ -1269,7 +1280,8 @@ static int _mi_read_rnd_mempack_record(MI_INFO *info, byte *buf,
info->nextpos=filepos+(uint) (pos-start)+block_info.rec_len; info->nextpos=filepos+(uint) (pos-start)+block_info.rec_len;
info->update|= HA_STATE_AKTIV | HA_STATE_KEY_CHANGED; info->update|= HA_STATE_AKTIV | HA_STATE_KEY_CHANGED;
DBUG_RETURN (_mi_pack_rec_unpack(info,buf,pos, block_info.rec_len)); DBUG_RETURN (_mi_pack_rec_unpack(info, &info->bit_buff, buf,
pos, block_info.rec_len));
err: err:
DBUG_RETURN(my_errno); DBUG_RETURN(my_errno);
} }
......
myisam/myisamdef.h
View file @ 5f08a831
...@@ -75,7 +75,7 @@ typedef struct st_mi_state_info ...@@ -75,7 +75,7 @@ typedef struct st_mi_state_info
ulong sec_index_changed; /* Updated when new sec_index */ ulong sec_index_changed; /* Updated when new sec_index */
ulong sec_index_used; /* which extra index are in use */ ulong sec_index_used; /* which extra index are in use */
ulonglong key_map; /* Which keys are in use */ ulonglong key_map; /* Which keys are in use */
ha_checksum checksum; ha_checksum checksum; /* Table checksum */
ulong version; /* timestamp of create */ ulong version; /* timestamp of create */
time_t create_time; /* Time when created database */ time_t create_time; /* Time when created database */
time_t recover_time; /* Time for last recover */ time_t recover_time; /* Time for last recover */
...@@ -176,6 +176,7 @@ typedef struct st_mi_isam_share { /* Shared between opens */ ...@@ -176,6 +176,7 @@ typedef struct st_mi_isam_share { /* Shared between opens */
int (*delete_record)(struct st_myisam_info*); int (*delete_record)(struct st_myisam_info*);
int (*read_rnd)(struct st_myisam_info*, byte*, my_off_t, my_bool); int (*read_rnd)(struct st_myisam_info*, byte*, my_off_t, my_bool);
int (*compare_record)(struct st_myisam_info*, const byte *); int (*compare_record)(struct st_myisam_info*, const byte *);
/* Function to use for a row checksum. */
ha_checksum (*calc_checksum)(struct st_myisam_info*, const byte *); ha_checksum (*calc_checksum)(struct st_myisam_info*, const byte *);
int (*compare_unique)(struct st_myisam_info*, MI_UNIQUEDEF *, int (*compare_unique)(struct st_myisam_info*, MI_UNIQUEDEF *,
const byte *record, my_off_t pos); const byte *record, my_off_t pos);
...@@ -249,7 +250,7 @@ struct st_myisam_info { ...@@ -249,7 +250,7 @@ struct st_myisam_info {
my_off_t last_keypage; /* Last key page read */ my_off_t last_keypage; /* Last key page read */
my_off_t last_search_keypage; /* Last keypage when searching */ my_off_t last_search_keypage; /* Last keypage when searching */
my_off_t dupp_key_pos; my_off_t dupp_key_pos;
ha_checksum checksum; ha_checksum checksum; /* Temp storage for row checksum */
/* QQ: the folloing two xxx_length fields should be removed, /* QQ: the folloing two xxx_length fields should be removed,
as they are not compatible with parallel repair */ as they are not compatible with parallel repair */
ulong packed_length,blob_length; /* Length of found, packed record */ ulong packed_length,blob_length; /* Length of found, packed record */
...@@ -297,8 +298,9 @@ typedef struct st_mi_sort_param ...@@ -297,8 +298,9 @@ typedef struct st_mi_sort_param
pthread_t thr; pthread_t thr;
IO_CACHE read_cache, tempfile, tempfile_for_exceptions; IO_CACHE read_cache, tempfile, tempfile_for_exceptions;
DYNAMIC_ARRAY buffpek; DYNAMIC_ARRAY buffpek;
MI_BIT_BUFF bit_buff; /* For parallel repair of packrec. */
/*
/*
The next two are used to collect statistics, see update_key_parts for The next two are used to collect statistics, see update_key_parts for
description. description.
*/ */
...@@ -309,6 +311,7 @@ typedef struct st_mi_sort_param ...@@ -309,6 +311,7 @@ typedef struct st_mi_sort_param
uint key, key_length,real_key_length,sortbuff_size; uint key, key_length,real_key_length,sortbuff_size;
uint maxbuffers, keys, find_length, sort_keys_length; uint maxbuffers, keys, find_length, sort_keys_length;
my_bool fix_datafile, master; my_bool fix_datafile, master;
my_bool calc_checksum; /* calculate table checksum */
MI_KEYDEF *keyinfo; MI_KEYDEF *keyinfo;
HA_KEYSEG *seg; HA_KEYSEG *seg;
SORT_INFO *sort_info; SORT_INFO *sort_info;
...@@ -361,8 +364,15 @@ typedef struct st_mi_sort_param ...@@ -361,8 +364,15 @@ typedef struct st_mi_sort_param
#define mi_putint(x,y,nod) { uint16 boh=(nod ? (uint16) 32768 : 0) + (uint16) (y);\ #define mi_putint(x,y,nod) { uint16 boh=(nod ? (uint16) 32768 : 0) + (uint16) (y);\
mi_int2store(x,boh); } mi_int2store(x,boh); }
#define mi_test_if_nod(x) (x[0] & 128 ? info->s->base.key_reflength : 0) #define mi_test_if_nod(x) (x[0] & 128 ? info->s->base.key_reflength : 0)
#define mi_mark_crashed(x) (x)->s->state.changed|=STATE_CRASHED #define mi_mark_crashed(x) do{(x)->s->state.changed|= STATE_CRASHED; \
#define mi_mark_crashed_on_repair(x) { (x)->s->state.changed|=STATE_CRASHED|STATE_CRASHED_ON_REPAIR ; (x)->update|= HA_STATE_CHANGED; } DBUG_PRINT("error", ("Marked table crashed")); \
}while(0)
#define mi_mark_crashed_on_repair(x) do{(x)->s->state.changed|= \
STATE_CRASHED|STATE_CRASHED_ON_REPAIR; \
(x)->update|= HA_STATE_CHANGED; \
DBUG_PRINT("error", \
("Marked table crashed")); \
}while(0)
#define mi_is_crashed(x) ((x)->s->state.changed & STATE_CRASHED) #define mi_is_crashed(x) ((x)->s->state.changed & STATE_CRASHED)
#define mi_is_crashed_on_repair(x) ((x)->s->state.changed & STATE_CRASHED_ON_REPAIR) #define mi_is_crashed_on_repair(x) ((x)->s->state.changed & STATE_CRASHED_ON_REPAIR)
...@@ -600,8 +610,8 @@ extern void _mi_print_key(FILE *stream,HA_KEYSEG *keyseg,const uchar *key, ...@@ -600,8 +610,8 @@ extern void _mi_print_key(FILE *stream,HA_KEYSEG *keyseg,const uchar *key,
extern my_bool _mi_read_pack_info(MI_INFO *info,pbool fix_keys); extern my_bool _mi_read_pack_info(MI_INFO *info,pbool fix_keys);
extern int _mi_read_pack_record(MI_INFO *info,my_off_t filepos,byte *buf); extern int _mi_read_pack_record(MI_INFO *info,my_off_t filepos,byte *buf);
extern int _mi_read_rnd_pack_record(MI_INFO*, byte *,my_off_t, my_bool); extern int _mi_read_rnd_pack_record(MI_INFO*, byte *,my_off_t, my_bool);
extern int _mi_pack_rec_unpack(MI_INFO *info,byte *to,byte *from, extern int _mi_pack_rec_unpack(MI_INFO *info, MI_BIT_BUFF *bit_buff,
ulong reclength); byte *to, byte *from, ulong reclength);
extern ulonglong mi_safe_mul(ulonglong a,ulonglong b); extern ulonglong mi_safe_mul(ulonglong a,ulonglong b);
extern int _mi_ft_update(MI_INFO *info, uint keynr, byte *keybuf, extern int _mi_ft_update(MI_INFO *info, uint keynr, byte *keybuf,
const byte *oldrec, const byte *newrec, my_off_t pos); const byte *oldrec, const byte *newrec, my_off_t pos);
...@@ -666,7 +676,9 @@ extern "C" { ...@@ -666,7 +676,9 @@ extern "C" {
extern uint _mi_get_block_info(MI_BLOCK_INFO *,File, my_off_t); extern uint _mi_get_block_info(MI_BLOCK_INFO *,File, my_off_t);
extern uint _mi_rec_pack(MI_INFO *info,byte *to,const byte *from); extern uint _mi_rec_pack(MI_INFO *info,byte *to,const byte *from);
extern uint _mi_pack_get_block_info(MI_INFO *, MI_BLOCK_INFO *, File, my_off_t); extern uint _mi_pack_get_block_info(MI_INFO *myisam, MI_BIT_BUFF *bit_buff,
MI_BLOCK_INFO *info, byte **rec_buff_p,
File file, my_off_t filepos);
extern void _my_store_blob_length(byte *pos,uint pack_length,uint length); extern void _my_store_blob_length(byte *pos,uint pack_length,uint length);
extern void _myisam_log(enum myisam_log_commands command,MI_INFO *info, extern void _myisam_log(enum myisam_log_commands command,MI_INFO *info,
const byte *buffert,uint length); const byte *buffert,uint length);
......
myisam/sort.c
View file @ 5f08a831
...@@ -309,7 +309,7 @@ static ha_rows NEAR_F find_all_keys(MI_SORT_PARAM *info, uint keys, ...@@ -309,7 +309,7 @@ static ha_rows NEAR_F find_all_keys(MI_SORT_PARAM *info, uint keys,
pthread_handler_decl(thr_find_all_keys,arg) pthread_handler_decl(thr_find_all_keys,arg)
{ {
MI_SORT_PARAM *info= (MI_SORT_PARAM*) arg; MI_SORT_PARAM *sort_param= (MI_SORT_PARAM*) arg;
int error; int error;
uint memavl,old_memavl,keys,sort_length; uint memavl,old_memavl,keys,sort_length;
uint idx, maxbuffer; uint idx, maxbuffer;
...@@ -321,32 +321,34 @@ pthread_handler_decl(thr_find_all_keys,arg) ...@@ -321,32 +321,34 @@ pthread_handler_decl(thr_find_all_keys,arg)
if (my_thread_init()) if (my_thread_init())
goto err; goto err;
if (info->sort_info->got_error) DBUG_ENTER("thr_find_all_keys");
DBUG_PRINT("enter", ("master: %d", sort_param->master));
if (sort_param->sort_info->got_error)
goto err; goto err;
if (info->keyinfo->flag && HA_VAR_LENGTH_KEY) if (sort_param->keyinfo->flag && HA_VAR_LENGTH_KEY)
{ {
info->write_keys=write_keys_varlen; sort_param->write_keys= write_keys_varlen;
info->read_to_buffer=read_to_buffer_varlen; sort_param->read_to_buffer= read_to_buffer_varlen;
info->write_key=write_merge_key_varlen; sort_param->write_key= write_merge_key_varlen;
} }
else else
{ {
info->write_keys=write_keys; sort_param->write_keys= write_keys;
info->read_to_buffer=read_to_buffer; sort_param->read_to_buffer= read_to_buffer;
info->write_key=write_merge_key; sort_param->write_key= write_merge_key;
} }
my_b_clear(&info->tempfile); my_b_clear(&sort_param->tempfile);
my_b_clear(&info->tempfile_for_exceptions); my_b_clear(&sort_param->tempfile_for_exceptions);
bzero((char*) &info->buffpek,sizeof(info->buffpek)); bzero((char*) &sort_param->buffpek, sizeof(sort_param->buffpek));
bzero((char*) &info->unique, sizeof(info->unique)); bzero((char*) &sort_param->unique, sizeof(sort_param->unique));
sort_keys= (uchar **) NULL; sort_keys= (uchar **) NULL;
memavl=max(info->sortbuff_size, MIN_SORT_MEMORY); memavl= max(sort_param->sortbuff_size, MIN_SORT_MEMORY);
idx= info->sort_info->max_records; idx= sort_param->sort_info->max_records;
sort_length= info->key_length; sort_length= sort_param->key_length;
maxbuffer= 1; maxbuffer= 1;
while (memavl >= MIN_SORT_MEMORY) while (memavl >= MIN_SORT_MEMORY)
{ {
...@@ -363,18 +365,19 @@ pthread_handler_decl(thr_find_all_keys,arg) ...@@ -363,18 +365,19 @@ pthread_handler_decl(thr_find_all_keys,arg)
(keys=(memavl-sizeof(BUFFPEK)*maxbuffer)/ (keys=(memavl-sizeof(BUFFPEK)*maxbuffer)/
(sort_length+sizeof(char*))) <= 1) (sort_length+sizeof(char*))) <= 1)
{ {
mi_check_print_error(info->sort_info->param, mi_check_print_error(sort_param->sort_info->param,
"sort_buffer_size is to small"); "sort_buffer_size is to small");
goto err; goto err;
} }
} }
while ((maxbuffer= (int) (idx/(keys-1)+1)) != skr); while ((maxbuffer= (int) (idx/(keys-1)+1)) != skr);
} }
if ((sort_keys=(uchar **)my_malloc(keys*(sort_length+sizeof(char*))+ if ((sort_keys= (uchar**)
((info->keyinfo->flag & HA_FULLTEXT) ? my_malloc(keys*(sort_length+sizeof(char*))+
HA_FT_MAXBYTELEN : 0), MYF(0)))) ((sort_param->keyinfo->flag & HA_FULLTEXT) ?
HA_FT_MAXBYTELEN : 0), MYF(0))))
{ {
if (my_init_dynamic_array(&info->buffpek, sizeof(BUFFPEK), if (my_init_dynamic_array(&sort_param->buffpek, sizeof(BUFFPEK),
maxbuffer, maxbuffer/2)) maxbuffer, maxbuffer/2))
my_free((gptr) sort_keys,MYF(0)); my_free((gptr) sort_keys,MYF(0));
else else
...@@ -386,69 +389,87 @@ pthread_handler_decl(thr_find_all_keys,arg) ...@@ -386,69 +389,87 @@ pthread_handler_decl(thr_find_all_keys,arg)
} }
if (memavl < MIN_SORT_MEMORY) if (memavl < MIN_SORT_MEMORY)
{ {
mi_check_print_error(info->sort_info->param,"Sort buffer to small"); /* purecov: tested */ mi_check_print_error(sort_param->sort_info->param, "Sort buffer too small");
goto err; /* purecov: tested */ goto err; /* purecov: tested */
} }
if (info->sort_info->param->testflag & T_VERBOSE) if (sort_param->sort_info->param->testflag & T_VERBOSE)
printf("Key %d - Allocating buffer for %d keys\n",info->key+1,keys); printf("Key %d - Allocating buffer for %d keys\n",
info->sort_keys=sort_keys; sort_param->key + 1, keys);
sort_param->sort_keys= sort_keys;
idx=error=0; idx=error=0;
sort_keys[0]=(uchar*) (sort_keys+keys); sort_keys[0]=(uchar*) (sort_keys+keys);
while (!(error=info->sort_info->got_error) && DBUG_PRINT("info", ("reading keys"));
!(error=(*info->key_read)(info,sort_keys[idx]))) while (!(error= sort_param->sort_info->got_error) &&
!(error= (*sort_param->key_read)(sort_param, sort_keys[idx])))
{ {
if (info->real_key_length > info->key_length) if (sort_param->real_key_length > sort_param->key_length)
{ {
if (write_key(info,sort_keys[idx], &info->tempfile_for_exceptions)) if (write_key(sort_param, sort_keys[idx],
&sort_param->tempfile_for_exceptions))
goto err; goto err;
continue; continue;
} }
if (++idx == keys) if (++idx == keys)
{ {
if (info->write_keys(info,sort_keys,idx-1, if (sort_param->write_keys(sort_param, sort_keys, idx - 1,
(BUFFPEK *)alloc_dynamic(&info->buffpek), (BUFFPEK*) alloc_dynamic(&sort_param->buffpek),
&info->tempfile)) &sort_param->tempfile))
goto err; goto err;
sort_keys[0]=(uchar*) (sort_keys+keys); sort_keys[0]=(uchar*) (sort_keys+keys);
memcpy(sort_keys[0],sort_keys[idx-1],(size_t) info->key_length); memcpy(sort_keys[0], sort_keys[idx - 1], (size_t) sort_param->key_length);
idx=1; idx=1;
} }
sort_keys[idx]=sort_keys[idx-1]+info->key_length; sort_keys[idx]= sort_keys[idx - 1] + sort_param->key_length;
} }
if (error > 0) if (error > 0)
goto err; goto err;
if (info->buffpek.elements) if (sort_param->buffpek.elements)
{ {
if (info->write_keys(info,sort_keys, idx, if (sort_param->write_keys(sort_param, sort_keys, idx,
(BUFFPEK *) alloc_dynamic(&info->buffpek), &info->tempfile)) (BUFFPEK*) alloc_dynamic(&sort_param->buffpek),
&sort_param->tempfile))
goto err; goto err;
info->keys=(info->buffpek.elements-1)*(keys-1)+idx; sort_param->keys= (sort_param->buffpek.elements - 1) * (keys - 1) + idx;
} }
else else
info->keys=idx; sort_param->keys= idx;
info->sort_keys_length=keys; sort_param->sort_keys_length= keys;
goto ok; goto ok;
err: err:
info->sort_info->got_error=1; /* no need to protect this with a mutex */ DBUG_PRINT("error", ("got some error"));
sort_param->sort_info->got_error= 1; /* no need to protect with a mutex */
if (sort_keys) if (sort_keys)
my_free((gptr) sort_keys,MYF(0)); my_free((gptr) sort_keys,MYF(0));
info->sort_keys=0; sort_param->sort_keys= 0;
delete_dynamic(& info->buffpek); delete_dynamic(& sort_param->buffpek);
close_cached_file(&info->tempfile); close_cached_file(&sort_param->tempfile);
close_cached_file(&info->tempfile_for_exceptions); close_cached_file(&sort_param->tempfile_for_exceptions);
ok: ok:
remove_io_thread(&info->read_cache); /*
pthread_mutex_lock(&info->sort_info->mutex); Detach from the share if the writer is involved. Avoid others to
info->sort_info->threads_running--; be blocked. This includes a flush of the write buffer. This will
pthread_cond_signal(&info->sort_info->cond); also indicate EOF to the readers.
pthread_mutex_unlock(&info->sort_info->mutex); */
if (sort_param->sort_info->info->rec_cache.share)
remove_io_thread(&sort_param->sort_info->info->rec_cache);
/* Readers detach from the share if any. Avoid others to be blocked. */
if (sort_param->read_cache.share)
remove_io_thread(&sort_param->read_cache);
pthread_mutex_lock(&sort_param->sort_info->mutex);
if (!--sort_param->sort_info->threads_running)
pthread_cond_signal(&sort_param->sort_info->cond);
pthread_mutex_unlock(&sort_param->sort_info->mutex);
DBUG_PRINT("exit", ("======== ending thread ========"));
my_thread_end(); my_thread_end();
return NULL; return NULL;
} }
...@@ -466,6 +487,7 @@ int thr_write_keys(MI_SORT_PARAM *sort_param) ...@@ -466,6 +487,7 @@ int thr_write_keys(MI_SORT_PARAM *sort_param)
MYISAM_SHARE *share=info->s; MYISAM_SHARE *share=info->s;
MI_SORT_PARAM *sinfo; MI_SORT_PARAM *sinfo;
byte *mergebuf=0; byte *mergebuf=0;
DBUG_ENTER("thr_write_keys");
LINT_INIT(length); LINT_INIT(length);
for (i= 0, sinfo= sort_param ; for (i= 0, sinfo= sort_param ;
...@@ -604,7 +626,7 @@ int thr_write_keys(MI_SORT_PARAM *sort_param) ...@@ -604,7 +626,7 @@ int thr_write_keys(MI_SORT_PARAM *sort_param)
} }
} }
my_free((gptr) mergebuf,MYF(MY_ALLOW_ZERO_PTR)); my_free((gptr) mergebuf,MYF(MY_ALLOW_ZERO_PTR));
return got_error; DBUG_RETURN(got_error);
} }
#endif /* THREAD */ #endif /* THREAD */
......
mysql-test/r/myisam.result
View file @ 5f08a831
...@@ -756,3 +756,129 @@ a b ...@@ -756,3 +756,129 @@ a b
xxxxxxxxx bbbbbb xxxxxxxxx bbbbbb
xxxxxxxxx bbbbbb xxxxxxxxx bbbbbb
DROP TABLE t1; DROP TABLE t1;
SET @@myisam_repair_threads=2;
SHOW VARIABLES LIKE 'myisam_repair%';
Variable_name Value
myisam_repair_threads 2
CREATE TABLE t1 (
`_id` int(11) NOT NULL default '0',
`url` text,
`email` text,
`description` text,
`loverlap` int(11) default NULL,
`roverlap` int(11) default NULL,
`lneighbor_id` int(11) default NULL,
`rneighbor_id` int(11) default NULL,
`length_` int(11) default NULL,
`sequence` mediumtext,
`name` text,
`_obj_class` text NOT NULL,
PRIMARY KEY (`_id`),
UNIQUE KEY `sequence_name_index` (`name`(50)),
KEY (`length_`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES
(1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample1',''),
(2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample2',''),
(3,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample3',''),
(4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample4',''),
(5,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample5',''),
(6,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample6',''),
(7,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample7',''),
(8,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample8',''),
(9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample9','');
SELECT _id FROM t1;
_id
1
2
3
4
5
6
7
8
9
DELETE FROM t1 WHERE _id < 8;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 9 Dynamic 2 # # # # 140 # # # # # #
CHECK TABLE t1 EXTENDED;
Table Op Msg_type Msg_text
test.t1 check status OK
OPTIMIZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 optimize status OK
CHECK TABLE t1 EXTENDED;
Table Op Msg_type Msg_text
test.t1 check status OK
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 9 Dynamic 2 # # # # 0 # # # # # #
SELECT _id FROM t1;
_id
8
9
DROP TABLE t1;
CREATE TABLE t1 (
`_id` int(11) NOT NULL default '0',
`url` text,
`email` text,
`description` text,
`loverlap` int(11) default NULL,
`roverlap` int(11) default NULL,
`lneighbor_id` int(11) default NULL,
`rneighbor_id` int(11) default NULL,
`length_` int(11) default NULL,
`sequence` mediumtext,
`name` text,
`_obj_class` text NOT NULL,
PRIMARY KEY (`_id`),
UNIQUE KEY `sequence_name_index` (`name`(50)),
KEY (`length_`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
INSERT INTO t1 VALUES
(1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample1',''),
(2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample2',''),
(3,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample3',''),
(4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample4',''),
(5,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample5',''),
(6,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample6',''),
(7,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample7',''),
(8,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample8',''),
(9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample9','');
SELECT _id FROM t1;
_id
1
2
3
4
5
6
7
8
9
DELETE FROM t1 WHERE _id < 8;
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 9 Dynamic 2 # # # # 140 # # # # # #
CHECK TABLE t1 EXTENDED;
Table Op Msg_type Msg_text
test.t1 check status OK
REPAIR TABLE t1 QUICK;
Table Op Msg_type Msg_text
test.t1 repair status OK
CHECK TABLE t1 EXTENDED;
Table Op Msg_type Msg_text
test.t1 check status OK
SHOW TABLE STATUS LIKE 't1';
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
t1 MyISAM 9 Dynamic 2 # # # # 140 # # # # # #
SELECT _id FROM t1;
_id
8
9
DROP TABLE t1;
SET @@myisam_repair_threads=1;
SHOW VARIABLES LIKE 'myisam_repair%';
Variable_name Value
myisam_repair_threads 1
mysql-test/t/myisam.test
View file @ 5f08a831
...@@ -714,4 +714,97 @@ UPDATE t1 AS ta1,t1 AS ta2 SET ta1.b='aaaaaa',ta2.b='bbbbbb'; ...@@ -714,4 +714,97 @@ UPDATE t1 AS ta1,t1 AS ta2 SET ta1.b='aaaaaa',ta2.b='bbbbbb';
SELECT * FROM t1; SELECT * FROM t1;
DROP TABLE t1; DROP TABLE t1;
#
# Bug#8283 - OPTIMIZE TABLE causes data loss
#
SET @@myisam_repair_threads=2;
SHOW VARIABLES LIKE 'myisam_repair%';
#
# Test OPTIMIZE. This creates a new data file.
CREATE TABLE t1 (
`_id` int(11) NOT NULL default '0',
`url` text,
`email` text,
`description` text,
`loverlap` int(11) default NULL,
`roverlap` int(11) default NULL,
`lneighbor_id` int(11) default NULL,
`rneighbor_id` int(11) default NULL,
`length_` int(11) default NULL,
`sequence` mediumtext,
`name` text,
`_obj_class` text NOT NULL,
PRIMARY KEY (`_id`),
UNIQUE KEY `sequence_name_index` (`name`(50)),
KEY (`length_`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
#
INSERT INTO t1 VALUES
(1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample1',''),
(2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample2',''),
(3,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample3',''),
(4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample4',''),
(5,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample5',''),
(6,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample6',''),
(7,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample7',''),
(8,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample8',''),
(9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample9','');
#
SELECT _id FROM t1;
DELETE FROM t1 WHERE _id < 8;
--replace_column 6 # 7 # 8 # 9 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
CHECK TABLE t1 EXTENDED;
OPTIMIZE TABLE t1;
CHECK TABLE t1 EXTENDED;
--replace_column 6 # 7 # 8 # 9 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
SELECT _id FROM t1;
DROP TABLE t1;
#
# Test REPAIR QUICK. This retains the old data file.
CREATE TABLE t1 (
`_id` int(11) NOT NULL default '0',
`url` text,
`email` text,
`description` text,
`loverlap` int(11) default NULL,
`roverlap` int(11) default NULL,
`lneighbor_id` int(11) default NULL,
`rneighbor_id` int(11) default NULL,
`length_` int(11) default NULL,
`sequence` mediumtext,
`name` text,
`_obj_class` text NOT NULL,
PRIMARY KEY (`_id`),
UNIQUE KEY `sequence_name_index` (`name`(50)),
KEY (`length_`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
#
INSERT INTO t1 VALUES
(1,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample1',''),
(2,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample2',''),
(3,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample3',''),
(4,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample4',''),
(5,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample5',''),
(6,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample6',''),
(7,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample7',''),
(8,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample8',''),
(9,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,'sample9','');
#
SELECT _id FROM t1;
DELETE FROM t1 WHERE _id < 8;
--replace_column 6 # 7 # 8 # 9 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
CHECK TABLE t1 EXTENDED;
REPAIR TABLE t1 QUICK;
CHECK TABLE t1 EXTENDED;
--replace_column 6 # 7 # 8 # 9 # 11 # 12 # 13 # 14 # 15 # 16 #
SHOW TABLE STATUS LIKE 't1';
SELECT _id FROM t1;
DROP TABLE t1;
#
SET @@myisam_repair_threads=1;
SHOW VARIABLES LIKE 'myisam_repair%';
# End of 4.1 tests # End of 4.1 tests
mysys/mf_iocache.c
View file @ 5f08a831
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