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mariadb/sql/handler.cc
monty@donna.mysql.fi 8700c02dae Changed Innobase to Innodb 
Deleted a lot of old benchmark runs
2001-04-13 12:25:12 +03:00

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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 */
/* Handler-calling-functions */
#ifdef __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include "ha_heap.h"
#include "ha_myisam.h"
#include "ha_myisammrg.h"
#ifndef NO_ISAM
#include "ha_isam.h"
#include "ha_isammrg.h"
#endif
#ifdef HAVE_BERKELEY_DB
#include "ha_berkeley.h"
#endif
#ifdef HAVE_INNOBASE_DB
#include "ha_innobase.h"
#endif
#ifdef HAVE_GEMINI_DB
#include "ha_gemini.h"
#endif
#include <myisampack.h>
#include <errno.h>
/* static functions defined in this file */
static int NEAR_F delete_file(const char *name,const char *ext,int extflag);
ulong ha_read_count, ha_write_count, ha_delete_count, ha_update_count,
ha_read_key_count, ha_read_next_count, ha_read_prev_count,
ha_read_first_count, ha_read_last_count,
ha_read_rnd_count, ha_read_rnd_next_count;
const char *ha_table_type[] = {
"", "DIAB_ISAM","HASH","MISAM","PISAM","RMS_ISAM","HEAP", "ISAM",
"MRG_ISAM","MYISAM", "MRG_MYISAM", "BDB", "INNOBASE", "GEMINI", "?", "?",NullS
};
TYPELIB ha_table_typelib= {array_elements(ha_table_type)-4,"",
ha_table_type+1};
const char *ha_row_type[] = {
"", "FIXED", "DYNAMIC", "COMPRESSED","?","?","?"
};
const char *tx_isolation_names[] =
{ "READ-UNCOMMITTED", "READ-COMMITTED", "REPEATABLE-READ", "SERIALIZABLE",
NullS};
TYPELIB tx_isolation_typelib= {array_elements(tx_isolation_names)-1,"",
tx_isolation_names};
/* Use other database handler if databasehandler is not incompiled */
enum db_type ha_checktype(enum db_type database_type)
{
switch (database_type) {
#ifdef HAVE_BERKELEY_DB
case DB_TYPE_BERKELEY_DB:
return(berkeley_skip ? DB_TYPE_MYISAM : database_type);
#endif
#ifdef HAVE_INNOBASE_DB
case DB_TYPE_INNOBASE:
return(innodb_skip ? DB_TYPE_MYISAM : database_type);
#endif
#ifdef HAVE_GEMINI_DB
case DB_TYPE_GEMINI:
return(gemini_skip ? DB_TYPE_MYISAM : database_type);
#endif
#ifndef NO_HASH
case DB_TYPE_HASH:
#endif
#ifndef NO_MERGE
case DB_TYPE_MRG_ISAM:
#endif
#ifndef NO_ISAM
case DB_TYPE_ISAM:
#endif
case DB_TYPE_HEAP:
case DB_TYPE_MYISAM:
case DB_TYPE_MRG_MYISAM:
return (database_type); /* Database exists on system */
default:
break;
}
return(DB_TYPE_MYISAM); /* Use this as default */
} /* ha_checktype */
handler *get_new_handler(TABLE *table, enum db_type db_type)
{
switch (db_type) {
#ifndef NO_HASH
return new ha_hash(table);
#endif
#ifndef NO_MERGE
case DB_TYPE_MRG_ISAM:
return new ha_isammrg(table);
#endif
#ifndef NO_ISAM
case DB_TYPE_ISAM:
return new ha_isam(table);
#endif
#ifdef HAVE_BERKELEY_DB
case DB_TYPE_BERKELEY_DB:
return new ha_berkeley(table);
#endif
#ifdef HAVE_INNOBASE_DB
case DB_TYPE_INNOBASE:
return new ha_innobase(table);
#endif
#ifdef HAVE_GEMINI_DB
case DB_TYPE_GEMINI:
return new ha_gemini(table);
#endif
case DB_TYPE_HEAP:
return new ha_heap(table);
case DB_TYPE_MYISAM:
default: // should never happen
return new ha_myisam(table);
case DB_TYPE_MRG_MYISAM:
return new ha_myisammrg(table);
}
}
int ha_init()
{
#ifdef HAVE_BERKELEY_DB
if (!berkeley_skip)
{
int error;
if ((error=berkeley_init()))
return error;
if (!berkeley_skip) // If we couldn't use handler
opt_using_transactions=1;
else
have_berkeley_db=SHOW_OPTION_DISABLED;
}
#endif
#ifdef HAVE_INNOBASE_DB
if (!innodb_skip)
{
if (innobase_init())
return -1;
if (!innodb_skip) // If we couldn't use handler
opt_using_transactions=1;
else
have_innodb=SHOW_OPTION_DISABLED;
}
#endif
#ifdef HAVE_GEMINI_DB
if (!gemini_skip)
{
if (gemini_init())
return -1;
if (!gemini_skip) // If we couldn't use handler
opt_using_transactions=1;
else
have_gemini=SHOW_OPTION_DISABLED;
}
#endif
return 0;
}
/* close, flush or restart databases */
/* Ignore this for other databases than ours */
int ha_panic(enum ha_panic_function flag)
{
int error=0;
#ifndef NO_MERGE
error|=mrg_panic(flag);
#endif
#ifndef NO_HASH
error|=h_panic(flag); /* fix hash */
#endif
error|=heap_panic(flag);
error|=nisam_panic(flag);
error|=mi_panic(flag);
error|=myrg_panic(flag);
#ifdef HAVE_BERKELEY_DB
if (!berkeley_skip)
error|=berkeley_end();
#endif
#ifdef HAVE_INNOBASE_DB
if (!innodb_skip)
error|=innobase_end();
#endif
#ifdef HAVE_GEMINI_DB
if (!gemini_skip)
error|=gemini_end();
#endif
return error;
} /* ha_panic */
void ha_close_connection(THD* thd)
{
#ifdef HAVE_INNOBASE_DB
if (!innodb_skip)
innobase_close_connection(thd);
#endif
#ifdef HAVE_GEMINI_DB
if (!gemini_skip && thd->gemini.context)
{
gemini_disconnect(thd);
}
#endif /* HAVE_GEMINI_DB */
}
/*
This is used to commit or rollback a single statement depending
on the value of error
*/
int ha_autocommit_or_rollback(THD *thd, int error)
{
DBUG_ENTER("ha_autocommit_or_rollback");
#ifdef USING_TRANSACTIONS
if (opt_using_transactions)
{
if (!error)
{
if (ha_commit_stmt(thd))
error=1;
}
else
(void) ha_rollback_stmt(thd);
thd->tx_isolation=thd->session_tx_isolation;
}
#endif
DBUG_RETURN(error);
}
int ha_commit_trans(THD *thd, THD_TRANS* trans)
{
int error=0;
DBUG_ENTER("ha_commit");
#ifdef USING_TRANSACTIONS
if (opt_using_transactions)
{
/* Update the binary log if we have cached some queries */
if (trans == &thd->transaction.all && mysql_bin_log.is_open() &&
my_b_tell(&thd->transaction.trans_log))
{
mysql_bin_log.write(&thd->transaction.trans_log);
reinit_io_cache(&thd->transaction.trans_log,
WRITE_CACHE, (my_off_t) 0, 0, 1);
thd->transaction.trans_log.end_of_file= max_binlog_cache_size;
}
#ifdef HAVE_BERKELEY_DB
if (trans->bdb_tid)
{
if ((error=berkeley_commit(thd,trans->bdb_tid)))
{
my_error(ER_ERROR_DURING_COMMIT, MYF(0), error);
error=1;
}
trans->bdb_tid=0;
}
#endif
#ifdef HAVE_INNOBASE_DB
if (trans->innobase_tid)
{
if ((error=innobase_commit(thd,trans->innobase_tid)))
{
my_error(ER_ERROR_DURING_COMMIT, MYF(0), error);
error=1;
}
}
#endif
#ifdef HAVE_GEMINI_DB
/* Commit the transaction in behalf of the commit statement
or if we're in auto-commit mode */
if((trans == &thd->transaction.all) ||
(!(thd->options & (OPTION_NOT_AUTO_COMMIT | OPTION_BEGIN))))
{
error=gemini_commit(thd);
if (error)
{
my_error(ER_ERROR_DURING_COMMIT, MYF(0), error);
error=1;
}
}
#endif
if (error && trans == &thd->transaction.all && mysql_bin_log.is_open())
sql_print_error("Error: Got error during commit; Binlog is not up to date!");
thd->tx_isolation=thd->session_tx_isolation;
}
#endif // using transactions
DBUG_RETURN(error);
}
int ha_rollback_trans(THD *thd, THD_TRANS *trans)
{
int error=0;
DBUG_ENTER("ha_rollback");
#ifdef USING_TRANSACTIONS
if (opt_using_transactions)
{
#ifdef HAVE_BERKELEY_DB
if (trans->bdb_tid)
{
if ((error=berkeley_rollback(thd, trans->bdb_tid)))
{
my_error(ER_ERROR_DURING_ROLLBACK, MYF(0), error);
error=1;
}
trans->bdb_tid=0;
}
#endif
#ifdef HAVE_INNOBASE_DB
if (trans->innobase_tid)
{
if ((error=innobase_rollback(thd, trans->innobase_tid)))
{
my_error(ER_ERROR_DURING_ROLLBACK, MYF(0), error);
error=1;
}
}
#endif
#ifdef HAVE_GEMINI_DB
if((trans == &thd->transaction.stmt) &&
(thd->options & (OPTION_NOT_AUTO_COMMIT | OPTION_BEGIN)))
error = gemini_rollback_to_savepoint(thd);
else
error=gemini_rollback(thd);
if (error)
{
my_error(ER_ERROR_DURING_ROLLBACK, MYF(0), error);
error=1;
}
#endif
if (trans == &thd->transaction.all)
reinit_io_cache(&thd->transaction.trans_log,
WRITE_CACHE, (my_off_t) 0, 0, 1);
thd->transaction.trans_log.end_of_file= max_binlog_cache_size;
thd->tx_isolation=thd->session_tx_isolation;
}
#endif /* USING_TRANSACTIONS */
DBUG_RETURN(error);
}
void ha_set_spin_retries(uint retries)
{
#ifdef HAVE_GEMINI_DB
if (!gemini_skip)
{
gemini_set_option_long(GEM_OPTID_SPIN_RETRIES, retries);
}
#endif /* HAVE_GEMINI_DB */
}
bool ha_flush_logs()
{
bool result=0;
#ifdef HAVE_BERKELEY_DB
if (!berkeley_skip && berkeley_flush_logs())
result=1;
#endif
#ifdef HAVE_INNOBASE_DB
if (!innodb_skip && innobase_flush_logs())
result=1;
#endif
return result;
}
/*
This should return ENOENT if the file doesn't exists.
The .frm file will be deleted only if we return 0 or ENOENT
*/
int ha_delete_table(enum db_type table_type, const char *path)
{
handler *file=get_new_handler((TABLE*) 0, table_type);
if (!file)
return ENOENT;
int error=file->delete_table(path);
delete file;
return error;
}
void ha_store_ptr(byte *buff, uint pack_length, my_off_t pos)
{
switch (pack_length) {
#if SIZEOF_OFF_T > 4
case 8: mi_int8store(buff,pos); break;
case 7: mi_int7store(buff,pos); break;
case 6: mi_int6store(buff,pos); break;
case 5: mi_int5store(buff,pos); break;
#endif
case 4: mi_int4store(buff,pos); break;
case 3: mi_int3store(buff,pos); break;
case 2: mi_int2store(buff,(uint) pos); break;
case 1: buff[0]= (uchar) pos; break;
}
return;
}
my_off_t ha_get_ptr(byte *ptr, uint pack_length)
{
my_off_t pos;
switch (pack_length) {
#if SIZEOF_OFF_T > 4
case 8:
pos= (my_off_t) mi_uint8korr(ptr);
break;
case 7:
pos= (my_off_t) mi_uint7korr(ptr);
break;
case 6:
pos= (my_off_t) mi_uint6korr(ptr);
break;
case 5:
pos= (my_off_t) mi_uint5korr(ptr);
break;
#endif
case 4:
pos= (my_off_t) mi_uint4korr(ptr);
break;
case 3:
pos= (my_off_t) mi_uint3korr(ptr);
break;
case 2:
pos= (my_off_t) mi_uint2korr(ptr);
break;
case 1:
pos= (my_off_t) mi_uint2korr(ptr);
break;
default:
pos=0; // Impossible
break;
}
return pos;
}
/****************************************************************************
** General handler functions
****************************************************************************/
/* Open database-handler. Try O_RDONLY if can't open as O_RDWR */
/* Don't wait for locks if not HA_OPEN_WAIT_IF_LOCKED is set */
int handler::ha_open(const char *name, int mode, int test_if_locked)
{
int error;
DBUG_ENTER("handler::open");
DBUG_PRINT("enter",("name: %s db_type: %d db_stat: %d mode: %d lock_test: %d",
name, table->db_type, table->db_stat, mode, test_if_locked));
if ((error=open(name,mode,test_if_locked)))
{
if ((error == EACCES || error == EROFS) && mode == O_RDWR &&
(table->db_stat & HA_TRY_READ_ONLY))
{
table->db_stat|=HA_READ_ONLY;
error=open(name,O_RDONLY,test_if_locked);
}
}
if (error)
{
my_errno=error; /* Safeguard */
DBUG_PRINT("error",("error: %d errno: %d",error,errno));
}
else
{
if (table->db_options_in_use & HA_OPTION_READ_ONLY_DATA)
table->db_stat|=HA_READ_ONLY;
}
if (!error)
{
if (!alloc_root_inited(&table->mem_root)) // If temporary table
ref=(byte*) sql_alloc(ALIGN_SIZE(ref_length)*2);
else
ref=(byte*) alloc_root(&table->mem_root, ALIGN_SIZE(ref_length)*2);
if (!ref)
{
close();
error=HA_ERR_OUT_OF_MEM;
}
else
dupp_ref=ref+ALIGN_SIZE(ref_length);
}
DBUG_RETURN(error);
}
int handler::check(THD* thd, HA_CHECK_OPT* check_opt)
{
return HA_ADMIN_NOT_IMPLEMENTED;
}
int handler::backup(THD* thd, HA_CHECK_OPT* check_opt)
{
return HA_ADMIN_NOT_IMPLEMENTED;
}
int handler::restore(THD* thd, HA_CHECK_OPT* check_opt)
{
return HA_ADMIN_NOT_IMPLEMENTED;
}
int handler::repair(THD* thd, HA_CHECK_OPT* check_opt)
{
return HA_ADMIN_NOT_IMPLEMENTED;
}
int handler::optimize(THD* thd, HA_CHECK_OPT* check_opt)
{
return HA_ADMIN_NOT_IMPLEMENTED;
}
int handler::analyze(THD* thd, HA_CHECK_OPT* check_opt)
{
return HA_ADMIN_NOT_IMPLEMENTED;
}
/* Read first row from a table */
int handler::rnd_first(byte * buf)
{
register int error;
DBUG_ENTER("handler::rnd_first");
statistic_increment(ha_read_first_count,&LOCK_status);
(void) rnd_init();
while ((error= rnd_next(buf)) == HA_ERR_RECORD_DELETED) ;
(void) rnd_end();
DBUG_RETURN(error);
}
/*
The following function is only needed for tables that may be temporary tables
during joins
*/
int handler::restart_rnd_next(byte *buf, byte *pos)
{
return HA_ERR_WRONG_COMMAND;
}
/* Set a timestamp in record */
void handler::update_timestamp(byte *record)
{
long skr= (long) current_thd->query_start();
#ifdef WORDS_BIGENDIAN
if (table->db_low_byte_first)
{
int4store(record,skr);
}
else
#endif
longstore(record,skr);
return;
}
/* Updates field with field_type NEXT_NUMBER according to following:
** if field = 0 change field to the next free key in database.
*/
void handler::update_auto_increment()
{
longlong nr;
THD *thd;
DBUG_ENTER("update_auto_increment");
if (table->next_number_field->val_int() != 0)
{
auto_increment_column_changed=0;
DBUG_VOID_RETURN;
}
thd=current_thd;
if ((nr=thd->next_insert_id))
thd->next_insert_id=0; // Clear after use
else
nr=get_auto_increment();
thd->insert_id((ulonglong) nr);
table->next_number_field->store(nr);
auto_increment_column_changed=1;
DBUG_VOID_RETURN;
}
longlong handler::get_auto_increment()
{
longlong nr;
int error;
(void) extra(HA_EXTRA_KEYREAD);
index_init(table->next_number_index);
error=index_last(table->record[1]);
if (error)
nr=1;
else
nr=(longlong) table->next_number_field->
val_int_offset(table->rec_buff_length)+1;
(void) extra(HA_EXTRA_NO_KEYREAD);
index_end();
return nr;
}
/* Print error that we got from handler function */
void handler::print_error(int error, myf errflag)
{
DBUG_ENTER("print_error");
DBUG_PRINT("enter",("error: %d",error));
int textno=ER_GET_ERRNO;
switch (error) {
case EAGAIN:
textno=ER_FILE_USED;
break;
case ENOENT:
textno=ER_FILE_NOT_FOUND;
break;
case HA_ERR_KEY_NOT_FOUND:
case HA_ERR_NO_ACTIVE_RECORD:
case HA_ERR_END_OF_FILE:
textno=ER_KEY_NOT_FOUND;
break;
case HA_ERR_WRONG_TABLE_DEF:
textno=ER_WRONG_MRG_TABLE;
break;
case HA_ERR_FOUND_DUPP_KEY:
{
uint key_nr=get_dup_key(error);
if ((int) key_nr >= 0)
{
/* Write the dupplicated key in the error message */
char key[MAX_KEY_LENGTH];
String str(key,sizeof(key));
key_unpack(&str,table,(uint) key_nr);
uint max_length=MYSQL_ERRMSG_SIZE-(uint) strlen(ER(ER_DUP_ENTRY));
if (str.length() >= max_length)
{
str.length(max_length-4);
str.append("...");
}
my_error(ER_DUP_ENTRY,MYF(0),str.c_ptr(),key_nr+1);
DBUG_VOID_RETURN;
}
textno=ER_DUP_KEY;
break;
}
case HA_ERR_FOUND_DUPP_UNIQUE:
textno=ER_DUP_UNIQUE;
break;
case HA_ERR_RECORD_CHANGED:
textno=ER_CHECKREAD;
break;
case HA_ERR_CRASHED:
textno=ER_NOT_KEYFILE;
break;
case HA_ERR_CRASHED_ON_USAGE:
textno=ER_CRASHED_ON_USAGE;
break;
case HA_ERR_CRASHED_ON_REPAIR:
textno=ER_CRASHED_ON_REPAIR;
break;
case HA_ERR_OUT_OF_MEM:
my_error(ER_OUT_OF_RESOURCES,errflag);
DBUG_VOID_RETURN;
case HA_ERR_WRONG_COMMAND:
textno=ER_ILLEGAL_HA;
break;
case HA_ERR_OLD_FILE:
textno=ER_OLD_KEYFILE;
break;
case HA_ERR_UNSUPPORTED:
textno=ER_UNSUPPORTED_EXTENSION;
break;
case HA_ERR_RECORD_FILE_FULL:
textno=ER_RECORD_FILE_FULL;
break;
default:
{
my_error(ER_GET_ERRNO,errflag,error);
DBUG_VOID_RETURN;
}
}
my_error(textno,errflag,table->table_name,error);
DBUG_VOID_RETURN;
}
/* Return key if error because of duplicated keys */
uint handler::get_dup_key(int error)
{
DBUG_ENTER("get_dup_key");
table->file->errkey = (uint) -1;
if (error == HA_ERR_FOUND_DUPP_KEY || error == HA_ERR_FOUND_DUPP_UNIQUE)
info(HA_STATUS_ERRKEY | HA_STATUS_NO_LOCK);
DBUG_RETURN(table->file->errkey);
}
int handler::delete_table(const char *name)
{
int error=0;
for (const char **ext=bas_ext(); *ext ; ext++)
{
if (delete_file(name,*ext,2))
{
if ((error=errno) != ENOENT)
break;
}
}
return error;
}
int handler::rename_table(const char * from, const char * to)
{
DBUG_ENTER("handler::rename_table");
for (const char **ext=bas_ext(); *ext ; ext++)
{
if (rename_file_ext(from,to,*ext))
DBUG_RETURN(my_errno);
}
DBUG_RETURN(0);
}
int ha_commit_rename(THD *thd)
{
int error=0;
#ifdef HAVE_GEMINI_DB
/* Gemini needs to commit the rename; otherwise a rollback will change
** the table names back internally but the physical files will still
** have the new names.
*/
if (ha_commit_stmt(thd))
error= -1;
if (ha_commit(thd))
error= -1;
#endif
return error;
}
int handler::index_next_same(byte *buf, const byte *key, uint keylen)
{
int error;
if (!(error=index_next(buf)))
{
if (key_cmp(table, key, active_index, keylen))
{
table->status=STATUS_NOT_FOUND;
error=HA_ERR_END_OF_FILE;
}
}
return error;
}
/*
The following is only needed if we would like to use the database
for internal temporary tables
*/
int handler::delete_all_rows()
{
return (my_errno=HA_ERR_WRONG_COMMAND);
}
/****************************************************************************
** Some general functions that isn't in the handler class
****************************************************************************/
/* Initiates table-file and calls apropriate database-creator */
/* Returns 1 if something got wrong */
int ha_create_table(const char *name, HA_CREATE_INFO *create_info,
bool update_create_info)
{
int error;
TABLE table;
DBUG_ENTER("ha_create_table");
if (openfrm(name,"",0,(uint) READ_ALL, 0, &table))
DBUG_RETURN(1);
if (update_create_info)
{
update_create_info_from_table(create_info, &table);
if (table.file->option_flag() & HA_DROP_BEFORE_CREATE)
table.file->delete_table(name); // Needed for BDB tables
}
error=table.file->create(name,&table,create_info);
VOID(closefrm(&table));
if (error)
my_error(ER_CANT_CREATE_TABLE,MYF(ME_BELL+ME_WAITTANG),name,my_errno);
DBUG_RETURN(error != 0);
}
/* Use key cacheing on all databases */
void ha_key_cache(void)
{
if (keybuff_size)
(void) init_key_cache(keybuff_size,0);
} /* ha_key_cache */
static int NEAR_F delete_file(const char *name,const char *ext,int extflag)
{
char buff[FN_REFLEN];
VOID(fn_format(buff,name,"",ext,extflag | 4));
return(my_delete(buff,MYF(MY_WME)));
}
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