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mariadb/sql/ha_myisam.cc
unknown eca2a1a3dc Update of query cache code. 
Changed some sql_alloc() -> thd->alloc()
Removed a lot of compiler warnings on Linux Alpha (64 bit)
Fixed some core dumps on 64 bit systems (wrong type for packet_len)


Docs/manual.texi:
  Added base information about the query cache.
include/hash.h:
  Export hash_replace
include/myisam.h:
  Update of query cache code
libmysql/net.c:
  Add casts to make things safe on 64 bit systems.
myisam/mi_write.c:
  Update of query cache code
myisammrg/myrg_extra.c:
  Update of query cache code
mysys/hash.c:
  Added safety check to hash_replace
sql/field.cc:
  Removed compiler warnings.
sql/field.h:
  Removed compiler warnings
sql/ha_myisam.cc:
  Fixed wrong type of packet_len
sql/item.h:
  Remove warnings
sql/log_event.cc:
  Cleanup
sql/log_event.h:
  Cleanup to make code more readable
sql/mf_iocache.cc:
  Fixed wrong type
sql/mysql_priv.h:
  Update of query cache code
sql/mysqld.cc:
  Update of query cache code
sql/net_serv.cc:
  Remove compiler warnings
sql/opt_range.h:
  Remove compiler warnings
sql/sql_cache.cc:
  Update of query cache code
sql/sql_cache.h:
  Update of query cache code
sql/sql_class.h:
  Cleanup
sql/sql_insert.cc:
  Use thd->alloc() instead of sql_alloc()
sql/sql_parse.cc:
  Fixed compiler warnings.
  Changed some sql_alloc() -> thd->alloc()
sql/sql_select.cc:
  Changed sql_alloc() -> thd_alloc()
sql/sql_select.h:
  Faster alloc()
sql/sql_show.cc:
  Update of query cache code
sql/sql_table.cc:
  Faster alloc()
sql/table.cc:
  Faster alloc()
2001-12-05 13:03:00 +02:00

1217 lines
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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifdef __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <m_ctype.h>
#include <myisampack.h>
#include "ha_myisam.h"
#include <stdarg.h>
#ifndef MASTER
#include "../srclib/myisam/myisamdef.h"
#else
#include "../myisam/myisamdef.h"
#endif
ulong myisam_sort_buffer_size;
ulong myisam_recover_options= HA_RECOVER_NONE;
/* bits in myisam_recover_options */
const char *myisam_recover_names[] =
{ "DEFAULT", "BACKUP", "FORCE", "QUICK", NullS};
TYPELIB myisam_recover_typelib= {array_elements(myisam_recover_names)-1,"",
myisam_recover_names};
/*****************************************************************************
** MyISAM tables
*****************************************************************************/
// collect errors printed by mi_check routines
static void mi_check_print_msg(MI_CHECK *param, const char* msg_type,
const char *fmt, va_list args)
{
THD* thd = (THD*)param->thd;
String* packet = &thd->packet;
uint length;
char msgbuf[MI_MAX_MSG_BUF];
char name[NAME_LEN*2+2];
packet->length(0);
msgbuf[0] = 0; // healthy paranoia ?
my_vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
msgbuf[sizeof(msgbuf) - 1] = 0; // healthy paranoia
DBUG_PRINT(msg_type,("message: %s",msgbuf));
if (thd->net.vio == 0)
{
sql_print_error(msgbuf);
return;
}
if (param->testflag & (T_CREATE_MISSING_KEYS | T_SAFE_REPAIR |
T_AUTO_REPAIR))
{
my_message(ER_NOT_KEYFILE,msgbuf,MYF(MY_WME));
return;
}
length=(uint) (strxmov(name, param->db_name,".",param->table_name,NullS) -
name);
net_store_data(packet, name, length);
net_store_data(packet, param->op_name);
net_store_data(packet, msg_type);
net_store_data(packet, msgbuf);
if (my_net_write(&thd->net, (char*)thd->packet.ptr(), thd->packet.length()))
fprintf(stderr,
"Failed on my_net_write, writing to stderr instead: %s\n",
msgbuf);
return;
}
extern "C" {
void mi_check_print_error(MI_CHECK *param, const char *fmt,...)
{
param->error_printed|=1;
param->out_flag|= O_DATA_LOST;
va_list args;
va_start(args, fmt);
mi_check_print_msg(param, "error", fmt, args);
va_end(args);
}
void mi_check_print_info(MI_CHECK *param, const char *fmt,...)
{
va_list args;
va_start(args, fmt);
mi_check_print_msg(param, "info", fmt, args);
va_end(args);
}
void mi_check_print_warning(MI_CHECK *param, const char *fmt,...)
{
param->warning_printed=1;
param->out_flag|= O_DATA_LOST;
va_list args;
va_start(args, fmt);
mi_check_print_msg(param, "warning", fmt, args);
va_end(args);
}
}
const char **ha_myisam::bas_ext() const
{ static const char *ext[]= { ".MYD",".MYI", NullS }; return ext; }
int ha_myisam::net_read_dump(NET* net)
{
int data_fd = file->dfile;
int error = 0;
my_seek(data_fd, 0L, MY_SEEK_SET, MYF(MY_WME));
for(;;)
{
ulong packet_len = my_net_read(net);
if (!packet_len)
break ; // end of file
if (packet_len == packet_error)
{
sql_print_error("ha_myisam::net_read_dump - read error ");
error= -1;
goto err;
}
if (my_write(data_fd, (byte*)net->read_pos, (uint) packet_len,
MYF(MY_WME|MY_FNABP)))
{
error = errno;
goto err;
}
}
err:
return error;
}
int ha_myisam::dump(THD* thd, int fd)
{
MYISAM_SHARE* share = file->s;
NET* net = &thd->net;
uint blocksize = share->blocksize;
my_off_t bytes_to_read = share->state.state.data_file_length;
int data_fd = file->dfile;
byte * buf = (byte*) my_malloc(blocksize, MYF(MY_WME));
if (!buf)
return ENOMEM;
int error = 0;
my_seek(data_fd, 0L, MY_SEEK_SET, MYF(MY_WME));
for(; bytes_to_read > 0;)
{
uint bytes = my_read(data_fd, buf, blocksize, MYF(MY_WME));
if (bytes == MY_FILE_ERROR)
{
error = errno;
goto err;
}
if (fd >= 0)
{
if (my_write(fd, buf, bytes, MYF(MY_WME | MY_FNABP)))
{
error = errno ? errno : EPIPE;
goto err;
}
}
else
{
if (my_net_write(net, (char*) buf, bytes))
{
error = errno ? errno : EPIPE;
goto err;
}
}
bytes_to_read -= bytes;
}
if (fd < 0)
{
my_net_write(net, "", 0);
net_flush(net);
}
err:
my_free((gptr) buf, MYF(0));
return error;
}
/* Name is here without an extension */
int ha_myisam::open(const char *name, int mode, uint test_if_locked)
{
if (!(file=mi_open(name, mode, test_if_locked)))
return (my_errno ? my_errno : -1);
if (test_if_locked & (HA_OPEN_IGNORE_IF_LOCKED | HA_OPEN_TMP_TABLE))
VOID(mi_extra(file,HA_EXTRA_NO_WAIT_LOCK));
info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
if (!(test_if_locked & HA_OPEN_WAIT_IF_LOCKED))
VOID(mi_extra(file,HA_EXTRA_WAIT_LOCK));
if (!table->db_record_offset)
int_option_flag|=HA_REC_NOT_IN_SEQ;
return (0);
}
int ha_myisam::close(void)
{
MI_INFO *tmp=file;
file=0;
return mi_close(tmp);
}
int ha_myisam::write_row(byte * buf)
{
statistic_increment(ha_write_count,&LOCK_status);
/* If we have a timestamp column, update it to the current time */
if (table->time_stamp)
update_timestamp(buf+table->time_stamp-1);
/*
If we have an auto_increment column and we are writing a changed row
or a new row, then update the auto_increment value in the record.
*/
if (table->next_number_field && buf == table->record[0])
update_auto_increment();
return mi_write(file,buf);
}
int ha_myisam::check(THD* thd, HA_CHECK_OPT* check_opt)
{
if (!file) return HA_ADMIN_INTERNAL_ERROR;
int error;
MI_CHECK param;
MYISAM_SHARE* share = file->s;
const char *old_proc_info=thd->proc_info;
thd->proc_info="Checking table";
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*)"check";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag = check_opt->flags | T_CHECK | T_SILENT;
if (!(table->db_stat & HA_READ_ONLY))
param.testflag|= T_STATISTICS;
param.using_global_keycache = 1;
if (!mi_is_crashed(file) &&
(((param.testflag & T_CHECK_ONLY_CHANGED) &&
!(share->state.changed & (STATE_CHANGED | STATE_CRASHED |
STATE_CRASHED_ON_REPAIR)) &&
share->state.open_count == 0) ||
((param.testflag & T_FAST) && (share->state.open_count ==
(uint) (share->global_changed ? 1 : 0)))))
return HA_ADMIN_ALREADY_DONE;
error = chk_status(&param, file); // Not fatal
error = chk_size(&param, file);
if (!error)
error |= chk_del(&param, file, param.testflag);
if (!error)
error = chk_key(&param, file);
if (!error)
{
if ((!check_opt->quick &&
((share->options &
(HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD)) ||
(param.testflag & (T_EXTEND | T_MEDIUM)))) ||
mi_is_crashed(file))
{
uint old_testflag=param.testflag;
param.testflag|=T_MEDIUM;
init_io_cache(&param.read_cache, file->dfile,
my_default_record_cache_size, READ_CACHE,
share->pack.header_length, 1, MYF(MY_WME));
error |= chk_data_link(&param, file, param.testflag & T_EXTEND);
end_io_cache(&(param.read_cache));
param.testflag=old_testflag;
}
}
if (!error)
{
if ((share->state.changed & (STATE_CHANGED |
STATE_CRASHED_ON_REPAIR |
STATE_CRASHED | STATE_NOT_ANALYZED)) ||
(param.testflag & T_STATISTICS) ||
mi_is_crashed(file))
{
file->update|=HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
pthread_mutex_lock(&share->intern_lock);
share->state.changed&= ~(STATE_CHANGED | STATE_CRASHED |
STATE_CRASHED_ON_REPAIR);
if (!(table->db_stat & HA_READ_ONLY))
error=update_state_info(&param,file,UPDATE_TIME | UPDATE_OPEN_COUNT |
UPDATE_STAT);
pthread_mutex_unlock(&share->intern_lock);
info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE |
HA_STATUS_CONST);
}
}
else if (!mi_is_crashed(file))
{
mi_mark_crashed(file);
file->update |= HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
}
check_opt->retry_without_quick=param.retry_without_quick;
thd->proc_info=old_proc_info;
return error ? HA_ADMIN_CORRUPT : HA_ADMIN_OK;
}
/*
analyze the key distribution in the table
As the table may be only locked for read, we have to take into account that
two threads may do an analyze at the same time!
*/
int ha_myisam::analyze(THD *thd, HA_CHECK_OPT* check_opt)
{
int error=0;
MI_CHECK param;
MYISAM_SHARE* share = file->s;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*) "analyze";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag=(T_FAST | T_CHECK | T_SILENT | T_STATISTICS |
T_DONT_CHECK_CHECKSUM);
param.using_global_keycache = 1;
if (!(share->state.changed & STATE_NOT_ANALYZED))
return HA_ADMIN_ALREADY_DONE;
error = chk_key(&param, file);
if (!error)
{
pthread_mutex_lock(&share->intern_lock);
error=update_state_info(&param,file,UPDATE_STAT);
pthread_mutex_unlock(&share->intern_lock);
}
else if (!mi_is_crashed(file))
mi_mark_crashed(file);
return error ? HA_ADMIN_CORRUPT : HA_ADMIN_OK;
}
int ha_myisam::restore(THD* thd, HA_CHECK_OPT *check_opt)
{
HA_CHECK_OPT tmp_check_opt;
char* backup_dir = thd->lex.backup_dir;
char src_path[FN_REFLEN], dst_path[FN_REFLEN];
char* table_name = table->real_name;
int error;
const char* errmsg;
DBUG_ENTER("restore");
if (fn_format_relative_to_data_home(src_path, table_name, backup_dir,
MI_NAME_DEXT))
DBUG_RETURN(HA_ADMIN_INVALID);
if (my_copy(src_path, fn_format(dst_path, table->path, "",
MI_NAME_DEXT, 4), MYF(MY_WME)))
{
error = HA_ADMIN_FAILED;
errmsg = "Failed in my_copy (Error %d)";
goto err;
}
tmp_check_opt.init();
tmp_check_opt.quick = 1;
tmp_check_opt.flags |= T_VERY_SILENT | T_CALC_CHECKSUM;
DBUG_RETURN(repair(thd, &tmp_check_opt));
err:
{
MI_CHECK param;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*)"restore";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag = 0;
mi_check_print_error(&param,errmsg, my_errno);
DBUG_RETURN(error);
}
}
int ha_myisam::backup(THD* thd, HA_CHECK_OPT *check_opt)
{
char* backup_dir = thd->lex.backup_dir;
char src_path[FN_REFLEN], dst_path[FN_REFLEN];
char* table_name = table->real_name;
int error;
const char *errmsg;
DBUG_ENTER("ha_myisam::backup");
if (fn_format_relative_to_data_home(dst_path, table_name, backup_dir,
reg_ext))
{
errmsg = "Failed in fn_format() for .frm file: errno = %d";
error = HA_ADMIN_INVALID;
goto err;
}
if (my_copy(fn_format(src_path, table->path,"", reg_ext, MY_UNPACK_FILENAME),
dst_path,
MYF(MY_WME | MY_HOLD_ORIGINAL_MODES)))
{
error = HA_ADMIN_FAILED;
errmsg = "Failed copying .frm file: errno = %d";
goto err;
}
/* Change extension */
if (!fn_format(dst_path, dst_path, "", MI_NAME_DEXT,
MY_REPLACE_EXT | MY_UNPACK_FILENAME | MY_SAFE_PATH))
{
errmsg = "Failed in fn_format() for .MYD file: errno = %d";
error = HA_ADMIN_INVALID;
goto err;
}
if (my_copy(fn_format(src_path, table->path,"", MI_NAME_DEXT,
MY_UNPACK_FILENAME),
dst_path,
MYF(MY_WME | MY_HOLD_ORIGINAL_MODES)))
{
errmsg = "Failed copying .MYD file: errno = %d";
error= HA_ADMIN_FAILED;
goto err;
}
DBUG_RETURN(HA_ADMIN_OK);
err:
{
MI_CHECK param;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*)"backup";
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.testflag = 0;
mi_check_print_error(&param,errmsg, my_errno);
DBUG_RETURN(error);
}
}
int ha_myisam::repair(THD* thd, HA_CHECK_OPT *check_opt)
{
int error;
MI_CHECK param;
ha_rows start_records;
if (!file) return HA_ADMIN_INTERNAL_ERROR;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*) "repair";
param.testflag = ((check_opt->flags & ~(T_EXTEND)) |
T_SILENT | T_FORCE_CREATE |
(check_opt->flags & T_EXTEND ? T_REP : T_REP_BY_SORT));
if (check_opt->quick)
param.opt_rep_quick++;
param.sort_buffer_length= check_opt->sort_buffer_size;
start_records=file->state->records;
while ((error=repair(thd,param,0)) && param.retry_repair)
{
param.retry_repair=0;
if (param.retry_without_quick && param.opt_rep_quick)
{
param.opt_rep_quick=0;
sql_print_error("Warning: Retrying repair of: '%s' without quick",
table->path);
continue;
}
param.opt_rep_quick=0; // Safety
if ((param.testflag & T_REP_BY_SORT))
{
param.testflag= (param.testflag & ~T_REP_BY_SORT) | T_REP;
sql_print_error("Warning: Retrying repair of: '%s' with keycache",
table->path);
continue;
}
break;
}
if (!error && start_records != file->state->records &&
!(check_opt->flags & T_VERY_SILENT))
{
char llbuff[22],llbuff2[22];
sql_print_error("Warning: Found %s of %s rows when repairing '%s'",
llstr(file->state->records, llbuff),
llstr(start_records, llbuff2),
table->path);
}
return error;
}
int ha_myisam::optimize(THD* thd, HA_CHECK_OPT *check_opt)
{
if (!file) return HA_ADMIN_INTERNAL_ERROR;
MI_CHECK param;
myisamchk_init(&param);
param.thd = thd;
param.op_name = (char*) "optimize";
param.testflag = (check_opt->flags | T_SILENT | T_FORCE_CREATE |
T_REP_BY_SORT | T_STATISTICS | T_SORT_INDEX);
if (check_opt->quick)
param.opt_rep_quick++;
param.sort_buffer_length= check_opt->sort_buffer_size;
return repair(thd,param,1);
}
int ha_myisam::repair(THD *thd, MI_CHECK &param, bool optimize)
{
int error=0;
uint local_testflag=param.testflag;
bool optimize_done= !optimize, statistics_done=0;
const char *old_proc_info=thd->proc_info;
char fixed_name[FN_REFLEN];
MYISAM_SHARE* share = file->s;
ha_rows rows= file->state->records;
DBUG_ENTER("ha_myisam::repair");
param.db_name = table->table_cache_key;
param.table_name = table->table_name;
param.tmpfile_createflag = O_RDWR | O_TRUNC;
param.using_global_keycache = 1;
param.thd=thd;
param.tmpdir=mysql_tmpdir;
param.out_flag=0;
strmov(fixed_name,file->filename);
// Don't lock tables if we have used LOCK TABLE
if (!thd->locked_tables && mi_lock_database(file,F_WRLCK))
{
mi_check_print_error(&param,ER(ER_CANT_LOCK),my_errno);
DBUG_RETURN(HA_ADMIN_FAILED);
}
if (!optimize ||
((file->state->del || share->state.split != file->state->records) &&
(!param.opt_rep_quick ||
!(share->state.changed & STATE_NOT_OPTIMIZED_KEYS))))
{
ulonglong key_map= ((local_testflag & T_CREATE_MISSING_KEYS) ?
((ulonglong) 1L << share->base.keys)-1 :
share->state.key_map);
uint testflag=param.testflag;
if (mi_test_if_sort_rep(file,file->state->records,key_map,0) &&
(local_testflag & T_REP_BY_SORT))
{
local_testflag|= T_STATISTICS;
param.testflag|= T_STATISTICS; // We get this for free
thd->proc_info="Repair by sorting";
statistics_done=1;
error = mi_repair_by_sort(&param, file, fixed_name, param.opt_rep_quick);
}
else
{
thd->proc_info="Repair with keycache";
param.testflag &= ~T_REP_BY_SORT;
error= mi_repair(&param, file, fixed_name, param.opt_rep_quick);
}
param.testflag=testflag;
optimize_done=1;
}
if (!error)
{
if ((local_testflag & T_SORT_INDEX) &&
(share->state.changed & STATE_NOT_SORTED_PAGES))
{
optimize_done=1;
thd->proc_info="Sorting index";
error=mi_sort_index(&param,file,fixed_name);
}
if (!statistics_done && (local_testflag & T_STATISTICS))
{
if (share->state.changed & STATE_NOT_ANALYZED)
{
optimize_done=1;
thd->proc_info="Analyzing";
error = chk_key(&param, file);
}
else
local_testflag&= ~T_STATISTICS; // Don't update statistics
}
}
thd->proc_info="Saving state";
if (!error)
{
if ((share->state.changed & STATE_CHANGED) || mi_is_crashed(file))
{
share->state.changed&= ~(STATE_CHANGED | STATE_CRASHED |
STATE_CRASHED_ON_REPAIR);
file->update|=HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
}
file->save_state=file->s->state.state;
if (file->s->base.auto_key)
update_auto_increment_key(&param, file, 1);
if (optimize_done)
error = update_state_info(&param, file,
UPDATE_TIME | UPDATE_OPEN_COUNT |
(local_testflag &
T_STATISTICS ? UPDATE_STAT : 0));
info(HA_STATUS_NO_LOCK | HA_STATUS_TIME | HA_STATUS_VARIABLE |
HA_STATUS_CONST);
if (rows != file->state->records && ! (param.testflag & T_VERY_SILENT))
{
char llbuff[22],llbuff2[22];
mi_check_print_warning(&param,"Number of rows changed from %s to %s",
llstr(rows,llbuff),
llstr(file->state->records,llbuff2));
}
}
else
{
mi_mark_crashed_on_repair(file);
file->update |= HA_STATE_CHANGED | HA_STATE_ROW_CHANGED;
update_state_info(&param, file, 0);
}
thd->proc_info=old_proc_info;
if (!thd->locked_tables)
mi_lock_database(file,F_UNLCK);
DBUG_RETURN(error ? HA_ADMIN_FAILED :
!optimize_done ? HA_ADMIN_ALREADY_DONE : HA_ADMIN_OK);
}
/* Deactive all not unique index that can be recreated fast */
void ha_myisam::deactivate_non_unique_index(ha_rows rows)
{
MYISAM_SHARE* share = file->s;
if (share->state.key_map == ((ulonglong) 1L << share->base.keys)-1)
{
if (!(specialflag & SPECIAL_SAFE_MODE))
if (rows==HA_POS_ERROR)
mi_extra(file, HA_EXTRA_NO_KEYS);
else
{
mi_disable_non_unique_index(file,rows);
mi_extra(file, HA_EXTRA_BULK_INSERT_BEGIN);
}
enable_activate_all_index=1;
}
else
enable_activate_all_index=0;
}
bool ha_myisam::activate_all_index(THD *thd)
{
int error=0;
MI_CHECK param;
MYISAM_SHARE* share = file->s;
DBUG_ENTER("activate_all_index");
mi_extra(file, HA_EXTRA_BULK_INSERT_END);
if (enable_activate_all_index &&
share->state.key_map != ((ulonglong) 1L << share->base.keys)-1)
{
const char *save_proc_info=thd->proc_info;
thd->proc_info="Creating index";
myisamchk_init(&param);
param.op_name = (char*) "recreating_index";
param.testflag = (T_SILENT | T_REP_BY_SORT |
T_CREATE_MISSING_KEYS | T_TRUST_HEADER);
param.myf_rw&= ~MY_WAIT_IF_FULL;
param.sort_buffer_length= myisam_sort_buffer_size;
param.opt_rep_quick++; // Don't copy data file
param.tmpdir=mysql_tmpdir;
error=repair(thd,param,0) != HA_ADMIN_OK;
thd->proc_info=save_proc_info;
}
else
enable_activate_all_index=1;
DBUG_RETURN(error);
}
bool ha_myisam::check_and_repair(THD *thd)
{
int error=0;
int marked_crashed;
HA_CHECK_OPT check_opt;
DBUG_ENTER("ha_myisam::auto_check_and_repair");
check_opt.init();
check_opt.flags= T_MEDIUM | T_AUTO_REPAIR;
// Don't use quick if deleted rows
if (!file->state->del && (myisam_recover_options & HA_RECOVER_QUICK))
check_opt.quick=1;
sql_print_error("Warning: Checking table: '%s'",table->path);
if ((marked_crashed=mi_is_crashed(file)) || check(thd, &check_opt))
{
sql_print_error("Warning: Recovering table: '%s'",table->path);
check_opt.quick= !check_opt.retry_without_quick && !marked_crashed;
check_opt.flags=(((myisam_recover_options & HA_RECOVER_BACKUP) ?
T_BACKUP_DATA : 0) |
(!(myisam_recover_options & HA_RECOVER_FORCE) ?
T_SAFE_REPAIR : 0)) | T_AUTO_REPAIR;
if (repair(thd, &check_opt))
error=1;
}
DBUG_RETURN(error);
}
bool ha_myisam::is_crashed() const
{
return (file->s->state.changed & STATE_CRASHED ||
(my_disable_locking && file->s->state.open_count));
}
int ha_myisam::update_row(const byte * old_data, byte * new_data)
{
statistic_increment(ha_update_count,&LOCK_status);
if (table->time_stamp)
update_timestamp(new_data+table->time_stamp-1);
return mi_update(file,old_data,new_data);
}
int ha_myisam::delete_row(const byte * buf)
{
statistic_increment(ha_delete_count,&LOCK_status);
return mi_delete(file,buf);
}
int ha_myisam::index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,active_index, key, key_len, find_flag);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,index, key, key_len, find_flag);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_next(byte * buf)
{
statistic_increment(ha_read_next_count,&LOCK_status);
int error=mi_rnext(file,buf,active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_prev(byte * buf)
{
statistic_increment(ha_read_prev_count,&LOCK_status);
int error=mi_rprev(file,buf, active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_first(byte * buf)
{
statistic_increment(ha_read_first_count,&LOCK_status);
int error=mi_rfirst(file, buf, active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_last(byte * buf)
{
statistic_increment(ha_read_last_count,&LOCK_status);
int error=mi_rlast(file, buf, active_index);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::index_next_same(byte * buf,
const byte *key __attribute__((unused)),
uint length __attribute__((unused)))
{
statistic_increment(ha_read_next_count,&LOCK_status);
int error=mi_rnext_same(file,buf);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::rnd_init(bool scan)
{
if (scan)
return mi_scan_init(file);
else
return mi_extra(file,HA_EXTRA_RESET);
}
int ha_myisam::rnd_next(byte *buf)
{
statistic_increment(ha_read_rnd_next_count,&LOCK_status);
int error=mi_scan(file, buf);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
int ha_myisam::restart_rnd_next(byte *buf, byte *pos)
{
return rnd_pos(buf,pos);
}
int ha_myisam::rnd_pos(byte * buf, byte *pos)
{
statistic_increment(ha_read_rnd_count,&LOCK_status);
int error=mi_rrnd(file, buf, ha_get_ptr(pos,ref_length));
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
void ha_myisam::position(const byte* record)
{
my_off_t position=mi_position(file);
ha_store_ptr(ref, ref_length, position);
}
void ha_myisam::info(uint flag)
{
MI_ISAMINFO info;
char name_buff[FN_REFLEN];
(void) mi_status(file,&info,flag);
if (flag & HA_STATUS_VARIABLE)
{
records = info.records;
deleted = info.deleted;
data_file_length=info.data_file_length;
index_file_length=info.index_file_length;
delete_length = info.delete_length;
check_time = info.check_time;
mean_rec_length=info.mean_reclength;
}
if (flag & HA_STATUS_CONST)
{
max_data_file_length=info.max_data_file_length;
max_index_file_length=info.max_index_file_length;
create_time = info.create_time;
sortkey = info.sortkey;
ref_length=info.reflength;
table->db_options_in_use = info.options;
block_size=myisam_block_size;
table->keys_in_use &= info.key_map;
table->db_record_offset=info.record_offset;
if (table->key_parts)
memcpy((char*) table->key_info[0].rec_per_key,
(char*) info.rec_per_key,
sizeof(ulong)*table->key_parts);
raid_type=info.raid_type;
raid_chunks=info.raid_chunks;
raid_chunksize=info.raid_chunksize;
/*
Set data_file_name and index_file_name to point at the symlink value
if table is symlinked (Ie; Real name is not same as generated name)
*/
data_file_name=index_file_name=0;
fn_format(name_buff, file->filename, "", MI_NAME_DEXT, 2);
if (strcmp(name_buff, info.data_file_name))
data_file_name=info.data_file_name;
strmov(fn_ext(name_buff),MI_NAME_IEXT);
if (strcmp(name_buff, info.index_file_name))
index_file_name=info.index_file_name;
}
if (flag & HA_STATUS_ERRKEY)
{
errkey = info.errkey;
ha_store_ptr(dupp_ref, ref_length, info.dupp_key_pos);
}
if (flag & HA_STATUS_TIME)
update_time = info.update_time;
if (flag & HA_STATUS_AUTO)
auto_increment_value= info.auto_increment;
}
int ha_myisam::extra(enum ha_extra_function operation)
{
if (((specialflag & SPECIAL_SAFE_MODE) || (test_flags & TEST_NO_EXTRA)) &&
(operation == HA_EXTRA_WRITE_CACHE ||
operation == HA_EXTRA_KEYREAD ||
operation == HA_EXTRA_BULK_INSERT_BEGIN))
return 0;
return mi_extra(file,operation);
}
int ha_myisam::reset(void)
{
return mi_extra(file,HA_EXTRA_RESET);
}
int ha_myisam::delete_all_rows()
{
return mi_delete_all_rows(file);
}
int ha_myisam::delete_table(const char *name)
{
return mi_delete_table(name);
}
int ha_myisam::external_lock(THD *thd, int lock_type)
{
return mi_lock_database(file,lock_type);
}
THR_LOCK_DATA **ha_myisam::store_lock(THD *thd,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type)
{
if (lock_type != TL_IGNORE && file->lock.type == TL_UNLOCK)
file->lock.type=lock_type;
*to++= &file->lock;
return to;
}
void ha_myisam::update_create_info(HA_CREATE_INFO *create_info)
{
table->file->info(HA_STATUS_AUTO | HA_STATUS_CONST);
if (!(create_info->used_fields & HA_CREATE_USED_AUTO))
{
create_info->auto_increment_value=auto_increment_value;
}
if (!(create_info->used_fields & HA_CREATE_USED_RAID))
{
create_info->raid_type= raid_type;
create_info->raid_chunks= raid_chunks;
create_info->raid_chunksize= raid_chunksize;
}
create_info->data_file_name=data_file_name;
create_info->index_file_name=index_file_name;
}
int ha_myisam::create(const char *name, register TABLE *form,
HA_CREATE_INFO *info)
{
int error;
uint i,j,recpos,minpos,fieldpos,temp_length,length;
bool found_auto_increment=0;
enum ha_base_keytype type;
char buff[FN_REFLEN];
KEY *pos;
MI_KEYDEF *keydef;
MI_COLUMNDEF *recinfo,*recinfo_pos;
MI_KEYSEG *keyseg;
uint options=form->db_options_in_use;
DBUG_ENTER("ha_myisam::create");
type=HA_KEYTYPE_BINARY; // Keep compiler happy
if (!(my_multi_malloc(MYF(MY_WME),
&recinfo,(form->fields*2+2)*sizeof(MI_COLUMNDEF),
&keydef, form->keys*sizeof(MI_KEYDEF),
&keyseg,
((form->key_parts + form->keys) * sizeof(MI_KEYSEG)),
0)))
DBUG_RETURN(1);
pos=form->key_info;
for (i=0; i < form->keys ; i++, pos++)
{
keydef[i].flag= (pos->flags & (HA_NOSAME | HA_FULLTEXT));
keydef[i].seg=keyseg;
keydef[i].keysegs=pos->key_parts;
for (j=0 ; j < pos->key_parts ; j++)
{
keydef[i].seg[j].flag=pos->key_part[j].key_part_flag;
Field *field=pos->key_part[j].field;
type=field->key_type();
if (options & HA_OPTION_PACK_KEYS ||
(pos->flags & (HA_PACK_KEY | HA_BINARY_PACK_KEY |
HA_SPACE_PACK_USED)))
{
if (pos->key_part[j].length > 8 &&
(type == HA_KEYTYPE_TEXT ||
type == HA_KEYTYPE_NUM ||
(type == HA_KEYTYPE_BINARY && !field->zero_pack())))
{
/* No blobs here */
if (j == 0)
keydef[i].flag|=HA_PACK_KEY;
if (!(field->flags & ZEROFILL_FLAG) &&
(field->type() == FIELD_TYPE_STRING ||
field->type() == FIELD_TYPE_VAR_STRING ||
((int) (pos->key_part[j].length - field->decimals()))
>= 4))
keydef[i].seg[j].flag|=HA_SPACE_PACK;
}
else if (j == 0 && (!(pos->flags & HA_NOSAME) || pos->key_length > 16))
keydef[i].flag|= HA_BINARY_PACK_KEY;
}
keydef[i].seg[j].type= (int) type;
keydef[i].seg[j].start= pos->key_part[j].offset;
keydef[i].seg[j].length= pos->key_part[j].length;
keydef[i].seg[j].bit_start=keydef[i].seg[j].bit_end=0;
keydef[i].seg[j].language=MY_CHARSET_CURRENT;
if (field->null_ptr)
{
keydef[i].seg[j].null_bit=field->null_bit;
keydef[i].seg[j].null_pos= (uint) (field->null_ptr-
(uchar*) form->record[0]);
}
else
{
keydef[i].seg[j].null_bit=0;
keydef[i].seg[j].null_pos=0;
}
if (j == 0 && field->flags & AUTO_INCREMENT_FLAG &&
!found_auto_increment)
{
keydef[i].flag|=HA_AUTO_KEY;
found_auto_increment=1;
}
if (field->type() == FIELD_TYPE_BLOB)
{
keydef[i].seg[j].flag|=HA_BLOB_PART;
/* save number of bytes used to pack length */
keydef[i].seg[j].bit_start= (uint) (field->pack_length() -
form->blob_ptr_size);
}
}
keyseg+=pos->key_parts;
}
recpos=0; recinfo_pos=recinfo;
while (recpos < (uint) form->reclength)
{
Field **field,*found=0;
minpos=form->reclength; length=0;
for (field=form->field ; *field ; field++)
{
if ((fieldpos=(*field)->offset()) >= recpos &&
fieldpos <= minpos)
{
/* skip null fields */
if (!(temp_length= (*field)->pack_length()))
continue; /* Skip null-fields */
if (! found || fieldpos < minpos ||
(fieldpos == minpos && temp_length < length))
{
minpos=fieldpos; found= *field; length=temp_length;
}
}
}
DBUG_PRINT("loop",("found: %lx recpos: %d minpos: %d length: %d",
found,recpos,minpos,length));
if (recpos != minpos)
{ // Reserved space (Null bits?)
bzero((char*) recinfo_pos,sizeof(*recinfo_pos));
recinfo_pos->type=(int) FIELD_NORMAL;
recinfo_pos++->length= (uint16) (minpos-recpos);
}
if (! found)
break;
if (found->flags & BLOB_FLAG)
{
recinfo_pos->type= (int) FIELD_BLOB;
}
else if (!(options & HA_OPTION_PACK_RECORD))
recinfo_pos->type= (int) FIELD_NORMAL;
else if (found->zero_pack())
recinfo_pos->type= (int) FIELD_SKIP_ZERO;
else
recinfo_pos->type= (int) ((length <= 3 ||
(found->flags & ZEROFILL_FLAG)) ?
FIELD_NORMAL :
found->type() == FIELD_TYPE_STRING ||
found->type() == FIELD_TYPE_VAR_STRING ?
FIELD_SKIP_ENDSPACE :
FIELD_SKIP_PRESPACE);
if (found->null_ptr)
{
recinfo_pos->null_bit=found->null_bit;
recinfo_pos->null_pos= (uint) (found->null_ptr-
(uchar*) form->record[0]);
}
else
{
recinfo_pos->null_bit=0;
recinfo_pos->null_pos=0;
}
(recinfo_pos++) ->length=(uint16) length;
recpos=minpos+length;
DBUG_PRINT("loop",("length: %d type: %d",
recinfo_pos[-1].length,recinfo_pos[-1].type));
}
MI_CREATE_INFO create_info;
bzero((char*) &create_info,sizeof(create_info));
create_info.max_rows=form->max_rows;
create_info.reloc_rows=form->min_rows;
create_info.auto_increment=(info->auto_increment_value ?
info->auto_increment_value -1 :
(ulonglong) 0);
create_info.data_file_length=(ulonglong) form->max_rows*form->avg_row_length;
create_info.raid_type=info->raid_type;
create_info.raid_chunks=info->raid_chunks ? info->raid_chunks : RAID_DEFAULT_CHUNKS;
create_info.raid_chunksize=info->raid_chunksize ? info->raid_chunksize : RAID_DEFAULT_CHUNKSIZE;
create_info.data_file_name= info->data_file_name;
create_info.index_file_name=info->index_file_name;
error=mi_create(fn_format(buff,name,"","",2+4),
form->keys,keydef,
(uint) (recinfo_pos-recinfo), recinfo,
0, (MI_UNIQUEDEF*) 0,
&create_info,
(((options & HA_OPTION_PACK_RECORD) ? HA_PACK_RECORD : 0) |
((options & HA_OPTION_CHECKSUM) ? HA_CREATE_CHECKSUM : 0) |
((options & HA_OPTION_DELAY_KEY_WRITE) ?
HA_CREATE_DELAY_KEY_WRITE : 0)));
my_free((gptr) recinfo,MYF(0));
DBUG_RETURN(error);
}
int ha_myisam::rename_table(const char * from, const char * to)
{
return mi_rename(from,to);
}
longlong ha_myisam::get_auto_increment()
{
if (!table->next_number_key_offset)
{ // Autoincrement at key-start
ha_myisam::info(HA_STATUS_AUTO);
return auto_increment_value;
}
longlong nr;
int error;
byte key[MAX_KEY_LENGTH];
(void) extra(HA_EXTRA_KEYREAD);
key_copy(key,table,table->next_number_index,
table->next_number_key_offset);
error=mi_rkey(file,table->record[1],(int) table->next_number_index,
key,table->next_number_key_offset,HA_READ_PREFIX_LAST);
if (error)
nr=1;
else
nr=(longlong)
table->next_number_field->val_int_offset(table->rec_buff_length)+1;
extra(HA_EXTRA_NO_KEYREAD);
return nr;
}
ha_rows ha_myisam::records_in_range(int inx,
const byte *start_key,uint start_key_len,
enum ha_rkey_function start_search_flag,
const byte *end_key,uint end_key_len,
enum ha_rkey_function end_search_flag)
{
return (ha_rows) mi_records_in_range(file,
inx,
start_key,start_key_len,
start_search_flag,
end_key,end_key_len,
end_search_flag);
}
int ha_myisam::ft_read(byte * buf)
{
int error;
if (!ft_handler)
return -1;
thread_safe_increment(ha_read_next_count,&LOCK_status); // why ?
error=ft_handler->please->read_next(ft_handler,(char*) buf);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
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