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/* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
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; version 2 of the License.
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., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */
/** @file handler.cc
@brief
Handler-calling-functions
*/
#include "handler.h"
#include "my_bit.h" // my_count_bits
#include "myisam.h" // TT_FOR_UPGRADE
#include "mysql_version.h" // MYSQL_VERSION_ID
#include "binlog.h" // mysql_bin_log
#include "debug_sync.h" // DEBUG_SYNC
#include "discover.h" // writefrm
#include "log.h" // sql_print_error
#include "log_event.h" // Write_rows_log_event
#include "my_bitmap.h" // MY_BITMAP
#include "probes_mysql.h" // MYSQL_HANDLER_WRLOCK_START
#include "opt_costconstantcache.h" // reload_optimizer_cost_constants
#include "rpl_handler.h" // RUN_HOOK
#include "sql_base.h" // free_io_cache
#include "sql_parse.h" // check_stack_overrun
#include "sql_plugin.h" // plugin_foreach
#include "sql_table.h" // build_table_filename
#include "transaction.h" // trans_commit_implicit
#include "trigger_def.h" // TRG_EXT
#include "sql_select.h" // actual_key_parts
#include "rpl_write_set_handler.h" // add_pke
#include "auth_common.h" // check_readonly() and SUPER_ACL
#include "pfs_file_provider.h"
#include "mysql/psi/mysql_file.h"
#include <pfs_table_provider.h>
#include <mysql/psi/mysql_table.h>
#include <pfs_transaction_provider.h>
#include <mysql/psi/mysql_transaction.h>
#include "opt_hints.h"
#include <list>
#include <cstring>
#include <string>
#include <boost/foreach.hpp>
#include <boost/tokenizer.hpp>
#include <boost/algorithm/string.hpp>
/**
@def MYSQL_TABLE_IO_WAIT
Instrumentation helper for table io_waits.
Note that this helper is intended to be used from
within the handler class only, as it uses members
from @c handler
Performance schema events are instrumented as follows:
- in non batch mode, one event is generated per call
- in batch mode, the number of rows affected is saved
in @c m_psi_numrows, so that @c end_psi_batch_mode()
generates a single event for the batch.
@param OP the table operation to be performed
@param INDEX the table index used if any, or MAX_KEY.
@param PAYLOAD instrumented code to execute
@sa handler::end_psi_batch_mode.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_TABLE_IO_WAIT(OP, INDEX, RESULT, PAYLOAD) \
{ \
if (m_psi != NULL) \
{ \
switch (m_psi_batch_mode) \
{ \
case PSI_BATCH_MODE_NONE: \
{ \
PSI_table_locker *sub_locker= NULL; \
PSI_table_locker_state reentrant_safe_state; \
sub_locker= PSI_TABLE_CALL(start_table_io_wait) \
(& reentrant_safe_state, m_psi, OP, INDEX, \
__FILE__, __LINE__); \
PAYLOAD \
if (sub_locker != NULL) \
PSI_TABLE_CALL(end_table_io_wait) \
(sub_locker, 1); \
break; \
} \
case PSI_BATCH_MODE_STARTING: \
{ \
m_psi_locker= PSI_TABLE_CALL(start_table_io_wait) \
(& m_psi_locker_state, m_psi, OP, INDEX, \
__FILE__, __LINE__); \
PAYLOAD \
if (!RESULT) \
m_psi_numrows++; \
m_psi_batch_mode= PSI_BATCH_MODE_STARTED; \
break; \
} \
case PSI_BATCH_MODE_STARTED: \
default: \
{ \
DBUG_ASSERT(m_psi_batch_mode \
== PSI_BATCH_MODE_STARTED); \
PAYLOAD \
if (!RESULT) \
m_psi_numrows++; \
break; \
} \
} \
} \
else \
{ \
PAYLOAD \
} \
}
#else
#define MYSQL_TABLE_IO_WAIT(OP, INDEX, RESULT, PAYLOAD) \
PAYLOAD
#endif
/**
@def MYSQL_TABLE_LOCK_WAIT
Instrumentation helper for table io_waits.
@param OP the table operation to be performed
@param FLAGS per table operation flags.
@param PAYLOAD the code to instrument.
@sa MYSQL_END_TABLE_WAIT.
*/
#ifdef HAVE_PSI_TABLE_INTERFACE
#define MYSQL_TABLE_LOCK_WAIT(OP, FLAGS, PAYLOAD) \
{ \
if (m_psi != NULL) \
{ \
PSI_table_locker *locker; \
PSI_table_locker_state state; \
locker= PSI_TABLE_CALL(start_table_lock_wait) \
(& state, m_psi, OP, FLAGS, \
__FILE__, __LINE__); \
PAYLOAD \
if (locker != NULL) \
PSI_TABLE_CALL(end_table_lock_wait)(locker); \
} \
else \
{ \
PAYLOAD \
} \
}
#else
#define MYSQL_TABLE_LOCK_WAIT(OP, FLAGS, PAYLOAD) \
PAYLOAD
#endif
using std::min;
using std::max;
using std::list;
// This is a temporary backporting fix.
#ifndef HAVE_LOG2
/*
This will be slightly slower and perhaps a tiny bit less accurate than
doing it the IEEE754 way but log2() should be available on C99 systems.
*/
inline double log2(double x)
{
return (log(x) / M_LN2);
}
#endif
/*
While we have legacy_db_type, we have this array to
check for dups and to find handlerton from legacy_db_type.
Remove when legacy_db_type is finally gone
*/
st_plugin_int *hton2plugin[MAX_HA];
/**
Array allowing to check if handlerton is builtin without
acquiring LOCK_plugin.
*/
static bool builtin_htons[MAX_HA];
const char *ha_resolve_storage_engine_name(const handlerton *db_type)
{
return db_type == NULL ? "UNKNOWN" : hton2plugin[db_type->slot]->name.str;
}
static handlerton *installed_htons[128];
#define BITMAP_STACKBUF_SIZE (128/8)
KEY_CREATE_INFO default_key_create_info=
{ HA_KEY_ALG_UNDEF, 0, {NullS, 0}, {NullS, 0}, true };
/* number of entries in handlertons[] */
ulong total_ha= 0;
/* number of storage engines (from handlertons[]) that support 2pc */
ulong total_ha_2pc= 0;
/* size of savepoint storage area (see ha_init) */
ulong savepoint_alloc_size= 0;
static const LEX_STRING sys_table_aliases[]=
{
{ C_STRING_WITH_LEN("INNOBASE") }, { C_STRING_WITH_LEN("INNODB") },
{ C_STRING_WITH_LEN("NDB") }, { C_STRING_WITH_LEN("NDBCLUSTER") },
{ C_STRING_WITH_LEN("HEAP") }, { C_STRING_WITH_LEN("MEMORY") },
{ C_STRING_WITH_LEN("MERGE") }, { C_STRING_WITH_LEN("MRG_MYISAM") },
{NullS, 0}
};
const char *ha_row_type[] = {
"", "FIXED", "DYNAMIC", "COMPRESSED", "REDUNDANT", "COMPACT",
/* Reserved to be "PAGE" in future versions */ "?",
"?","?","?"
};
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, NULL};
#ifndef DBUG_OFF
const char *ha_legacy_type_name(legacy_db_type legacy_type)
{
switch (legacy_type)
{
case DB_TYPE_UNKNOWN:
return "DB_TYPE_UNKNOWN";
case DB_TYPE_DIAB_ISAM:
return "DB_TYPE_DIAB_ISAM";
case DB_TYPE_HASH:
return "DB_TYPE_HASH";
case DB_TYPE_MISAM:
return "DB_TYPE_MISAM";
case DB_TYPE_PISAM:
return "DB_TYPE_PISAM";
case DB_TYPE_RMS_ISAM:
return "DB_TYPE_RMS_ISAM";
case DB_TYPE_HEAP:
return "DB_TYPE_HEAP";
case DB_TYPE_ISAM:
return "DB_TYPE_ISAM";
case DB_TYPE_MRG_ISAM:
return "DB_TYPE_MRG_ISAM";
case DB_TYPE_MYISAM:
return "DB_TYPE_MYISAM";
case DB_TYPE_MRG_MYISAM:
return "DB_TYPE_MRG_MYISAM";
case DB_TYPE_BERKELEY_DB:
return "DB_TYPE_BERKELEY_DB";
case DB_TYPE_INNODB:
return "DB_TYPE_INNODB";
case DB_TYPE_GEMINI:
return "DB_TYPE_GEMINI";
case DB_TYPE_NDBCLUSTER:
return "DB_TYPE_NDBCLUSTER";
case DB_TYPE_EXAMPLE_DB:
return "DB_TYPE_EXAMPLE_DB";
case DB_TYPE_ARCHIVE_DB:
return "DB_TYPE_ARCHIVE_DB";
case DB_TYPE_CSV_DB:
return "DB_TYPE_CSV_DB";
case DB_TYPE_FEDERATED_DB:
return "DB_TYPE_FEDERATED_DB";
case DB_TYPE_BLACKHOLE_DB:
return "DB_TYPE_BLACKHOLE_DB";
case DB_TYPE_PARTITION_DB:
return "DB_TYPE_PARTITION_DB";
case DB_TYPE_BINLOG:
return "DB_TYPE_BINLOG";
case DB_TYPE_SOLID:
return "DB_TYPE_SOLID";
case DB_TYPE_PBXT:
return "DB_TYPE_PBXT";
case DB_TYPE_TABLE_FUNCTION:
return "DB_TYPE_TABLE_FUNCTION";
case DB_TYPE_MEMCACHE:
return "DB_TYPE_MEMCACHE";
case DB_TYPE_FALCON:
return "DB_TYPE_FALCON";
case DB_TYPE_MARIA:
return "DB_TYPE_MARIA";
case DB_TYPE_PERFORMANCE_SCHEMA:
return "DB_TYPE_PERFORMANCE_SCHEMA";
default:
return "DB_TYPE_DYNAMIC";
}
}
#endif
/**
Database name that hold most of mysqld system tables.
Current code assumes that, there exists only some
specific "database name" designated as system database.
*/
const char* mysqld_system_database= "mysql";
// System tables that belong to mysqld_system_database.
st_handler_tablename mysqld_system_tables[]= {
{mysqld_system_database, "db"},
{mysqld_system_database, "user"},
{mysqld_system_database, "host"},
{mysqld_system_database, "func"},
{mysqld_system_database, "proc"},
{mysqld_system_database, "event"},
{mysqld_system_database, "plugin"},
{mysqld_system_database, "servers"},
{mysqld_system_database, "procs_priv"},
{mysqld_system_database, "tables_priv"},
{mysqld_system_database, "proxies_priv"},
{mysqld_system_database, "columns_priv"},
{mysqld_system_database, "time_zone"},
{mysqld_system_database, "time_zone_name"},
{mysqld_system_database, "time_zone_leap_second"},
{mysqld_system_database, "time_zone_transition"},
{mysqld_system_database, "time_zone_transition_type"},
{mysqld_system_database, "help_category"},
{mysqld_system_database, "help_keyword"},
{mysqld_system_database, "help_relation"},
{mysqld_system_database, "help_topic"},
{mysqld_system_database, "innodb_table_stats"},
{mysqld_system_database, "innodb_index_stats"},
{(const char *)NULL, (const char *)NULL} /* This must be at the end */
};
/**
This static pointer holds list of system databases from SQL layer and
various SE's. The required memory is allocated once, and never freed.
*/
static const char **known_system_databases= NULL;
static const char **ha_known_system_databases();
// Called for each SE to get SE specific system database.
static my_bool system_databases_handlerton(THD *unused, plugin_ref plugin,
void *arg);
// Called for each SE to check if given db.table_name is a system table.
static my_bool check_engine_system_table_handlerton(THD *unused,
plugin_ref plugin,
void *arg);
/**
Structure used by SE during check for system table.
This structure is passed to each SE handlerton and the status (OUT param)
is collected.
*/
struct st_sys_tbl_chk_params
{
const char *db; // IN param
const char *table_name; // IN param
bool is_sql_layer_system_table; // IN param
legacy_db_type db_type; // IN param
enum enum_status
{
// db.table_name is user table.
USER_TABLE,
/*
db.table_name is a system table,
but may not be supported by SE.
*/
SYSTEM_TABLE,
/*
db.table_name is a system table,
and is supported by SE.
*/
SE_SUPPORTED_SYSTEM_TABLE
} status; // OUT param
};
static plugin_ref ha_default_plugin(THD *thd)
{
if (thd->variables.table_plugin)
return thd->variables.table_plugin;
return my_plugin_lock(thd, &global_system_variables.table_plugin);
}
/** @brief
Return the default storage engine handlerton used for non-temp tables
for thread
SYNOPSIS
ha_default_handlerton(thd)
thd current thread
RETURN
pointer to handlerton
*/
handlerton *ha_default_handlerton(THD *thd)
{
plugin_ref plugin= ha_default_plugin(thd);
DBUG_ASSERT(plugin);
handlerton *hton= plugin_data<handlerton*>(plugin);
DBUG_ASSERT(hton);
return hton;
}
static plugin_ref ha_default_temp_plugin(THD *thd)
{
if (thd->variables.temp_table_plugin)
return thd->variables.temp_table_plugin;
return my_plugin_lock(thd, &global_system_variables.temp_table_plugin);
}
/** @brief
Return the default storage engine handlerton used for explicitly
created temp tables for a thread
SYNOPSIS
ha_default_temp_handlerton(thd)
thd current thread
RETURN
pointer to handlerton
*/
handlerton *ha_default_temp_handlerton(THD *thd)
{
plugin_ref plugin= ha_default_temp_plugin(thd);
DBUG_ASSERT(plugin);
handlerton *hton= plugin_data<handlerton*>(plugin);
DBUG_ASSERT(hton);
return hton;
}
/**
Resolve handlerton plugin by name, without checking for "DEFAULT" or
HTON_NOT_USER_SELECTABLE.
@param thd Thread context.
@param name Plugin name.
@return plugin or NULL if not found.
*/
plugin_ref ha_resolve_by_name_raw(THD *thd, const LEX_CSTRING &name)
{
return plugin_lock_by_name(thd, name, MYSQL_STORAGE_ENGINE_PLUGIN);
}
/** @brief
Return the storage engine handlerton for the supplied name
SYNOPSIS
ha_resolve_by_name(thd, name)
thd current thread
name name of storage engine
RETURN
pointer to storage engine plugin handle
*/
plugin_ref ha_resolve_by_name(THD *thd, const LEX_STRING *name,
bool is_temp_table)
{
const LEX_STRING *table_alias;
plugin_ref plugin;
redo:
/* my_strnncoll is a macro and gcc doesn't do early expansion of macro */
if (thd && !my_charset_latin1.coll->strnncoll(&my_charset_latin1,
(const uchar *)name->str, name->length,
(const uchar *)STRING_WITH_LEN("DEFAULT"), 0))
return is_temp_table ?
ha_default_plugin(thd) : ha_default_temp_plugin(thd);
LEX_CSTRING cstring_name= {name->str, name->length};
if ((plugin= ha_resolve_by_name_raw(thd, cstring_name)))
{
handlerton *hton= plugin_data<handlerton*>(plugin);
if (hton && !(hton->flags & HTON_NOT_USER_SELECTABLE))
return plugin;
/*
unlocking plugin immediately after locking is relatively low cost.
*/
plugin_unlock(thd, plugin);
}
/*
We check for the historical aliases.
*/
for (table_alias= sys_table_aliases; table_alias->str; table_alias+= 2)
{
if (!my_strnncoll(&my_charset_latin1,
(const uchar *)name->str, name->length,
(const uchar *)table_alias->str, table_alias->length))
{
name= table_alias + 1;
goto redo;
}
}
return NULL;
}
std::string normalized_se_str= "";
/*
Parse comma separated list of disabled storage engine names
and create a normalized string by appending storage names that
have aliases. This normalized string is used to disallow
table/tablespace creation under the storage engines specified.
*/
void ha_set_normalized_disabled_se_str(const std::string &disabled_se)
{
boost::char_separator<char> sep(",");
boost::tokenizer< boost::char_separator<char> > tokens(disabled_se, sep);
normalized_se_str.append(",");
BOOST_FOREACH (std::string se_name, tokens)
{
const LEX_STRING *table_alias;
boost::algorithm::to_upper(se_name);
for (table_alias= sys_table_aliases; table_alias->str; table_alias+= 2)
{
if (!strcasecmp(se_name.c_str(), table_alias->str) ||
!strcasecmp(se_name.c_str(), (table_alias+1)->str))
{
normalized_se_str.append(std::string(table_alias->str) + "," +
std::string((table_alias+1)->str) + ",");
break;
}
}
if (table_alias->str == NULL)
normalized_se_str.append(se_name+",");
}
}
// Check if storage engine is disabled for table/tablespace creation.
bool ha_is_storage_engine_disabled(handlerton *se_handle)
{
if (normalized_se_str.size())
{
std::string se_name(",");
se_name.append(ha_resolve_storage_engine_name(se_handle));
se_name.append(",");
boost::algorithm::to_upper(se_name);
if(strstr(normalized_se_str.c_str(), se_name.c_str()))
return true;
}
return false;
}
plugin_ref ha_lock_engine(THD *thd, const handlerton *hton)
{
if (hton)
{
st_plugin_int **plugin= hton2plugin + hton->slot;
#ifdef DBUG_OFF
/*
Take a shortcut for builtin engines -- return pointer to plugin
without acquiring LOCK_plugin mutex. This is safe safe since such
plugins are not deleted until shutdown and we don't do reference
counting in non-debug builds for them.
Since we have reference to handlerton on our hands, this method
can't be called concurrently to non-builtin handlerton initialization/
deinitialization. So it is safe to access builtin_htons[] without
additional locking.
*/
if (builtin_htons[hton->slot])
return *plugin;
return my_plugin_lock(thd, plugin);
#else
/*
We can't take shortcut in debug builds.
At least assert that builtin_htons[slot] is set correctly.
*/
DBUG_ASSERT(builtin_htons[hton->slot] == (plugin[0]->plugin_dl == NULL));
return my_plugin_lock(thd, &plugin);
#endif
}
return NULL;
}
handlerton *ha_resolve_by_legacy_type(THD *thd, enum legacy_db_type db_type)
{
plugin_ref plugin;
switch (db_type) {
case DB_TYPE_DEFAULT:
return ha_default_handlerton(thd);
default:
if (db_type > DB_TYPE_UNKNOWN && db_type < DB_TYPE_DEFAULT &&
(plugin= ha_lock_engine(thd, installed_htons[db_type])))
return plugin_data<handlerton*>(plugin);
/* fall through */
case DB_TYPE_UNKNOWN:
return NULL;
}
}
/**
Use other database handler if databasehandler is not compiled in.
*/
handlerton *ha_checktype(THD *thd, enum legacy_db_type database_type,
bool no_substitute, bool report_error)
{
handlerton *hton= ha_resolve_by_legacy_type(thd, database_type);
if (ha_storage_engine_is_enabled(hton))
return hton;
if (no_substitute)
{
if (report_error)
{
const char *engine_name= ha_resolve_storage_engine_name(hton);
my_error(ER_FEATURE_DISABLED,MYF(0),engine_name,engine_name);
}
return NULL;
}
(void) RUN_HOOK(transaction, after_rollback, (thd, FALSE));
switch (database_type) {
case DB_TYPE_MRG_ISAM:
return ha_resolve_by_legacy_type(thd, DB_TYPE_MRG_MYISAM);
default:
break;
}
return ha_default_handlerton(thd);
} /* ha_checktype */
handler *get_new_handler(TABLE_SHARE *share, MEM_ROOT *alloc,
handlerton *db_type)
{
handler *file;
DBUG_ENTER("get_new_handler");
DBUG_PRINT("enter", ("alloc: 0x%lx", (long) alloc));
if (db_type && db_type->state == SHOW_OPTION_YES && db_type->create)
{
if ((file= db_type->create(db_type, share, alloc)))
file->init();
DBUG_RETURN(file);
}
/*
Try the default table type
Here the call to current_thd() is ok as we call this function a lot of
times but we enter this branch very seldom.
*/
DBUG_RETURN(get_new_handler(share, alloc, ha_default_handlerton(current_thd)));
}
static const char **handler_errmsgs;
C_MODE_START
static const char *get_handler_errmsg(int nr)
{
return handler_errmsgs[nr - HA_ERR_FIRST];
}
C_MODE_END
/**
Register handler error messages for use with my_error().
@retval
0 OK
@retval
!=0 Error
*/
int ha_init_errors(void)
{
#define SETMSG(nr, msg) handler_errmsgs[(nr) - HA_ERR_FIRST]= (msg)
/* Allocate a pointer array for the error message strings. */
/* Zerofill it to avoid uninitialized gaps. */
if (! (handler_errmsgs= (const char**) my_malloc(key_memory_handler_errmsgs,
HA_ERR_ERRORS * sizeof(char*),
MYF(MY_WME | MY_ZEROFILL))))
return 1;
/* Set the dedicated error messages. */
SETMSG(HA_ERR_KEY_NOT_FOUND, ER_DEFAULT(ER_KEY_NOT_FOUND));
SETMSG(HA_ERR_FOUND_DUPP_KEY, ER_DEFAULT(ER_DUP_KEY));
SETMSG(HA_ERR_RECORD_CHANGED, "Update wich is recoverable");
SETMSG(HA_ERR_WRONG_INDEX, "Wrong index given to function");
SETMSG(HA_ERR_CRASHED, ER_DEFAULT(ER_NOT_KEYFILE));
SETMSG(HA_ERR_WRONG_IN_RECORD, ER_DEFAULT(ER_CRASHED_ON_USAGE));
SETMSG(HA_ERR_OUT_OF_MEM, "Table handler out of memory");
SETMSG(HA_ERR_NOT_A_TABLE, "Incorrect file format '%.64s'");
SETMSG(HA_ERR_WRONG_COMMAND, "Command not supported");
SETMSG(HA_ERR_OLD_FILE, ER_DEFAULT(ER_OLD_KEYFILE));
SETMSG(HA_ERR_NO_ACTIVE_RECORD, "No record read in update");
SETMSG(HA_ERR_RECORD_DELETED, "Intern record deleted");
SETMSG(HA_ERR_RECORD_FILE_FULL, ER_DEFAULT(ER_RECORD_FILE_FULL));
SETMSG(HA_ERR_INDEX_FILE_FULL, "No more room in index file '%.64s'");
SETMSG(HA_ERR_END_OF_FILE, "End in next/prev/first/last");
SETMSG(HA_ERR_UNSUPPORTED, ER_DEFAULT(ER_ILLEGAL_HA));
SETMSG(HA_ERR_TOO_BIG_ROW, "Too big row");
SETMSG(HA_WRONG_CREATE_OPTION, "Wrong create option");
SETMSG(HA_ERR_FOUND_DUPP_UNIQUE, ER_DEFAULT(ER_DUP_UNIQUE));
SETMSG(HA_ERR_UNKNOWN_CHARSET, "Can't open charset");
SETMSG(HA_ERR_WRONG_MRG_TABLE_DEF, ER_DEFAULT(ER_WRONG_MRG_TABLE));
SETMSG(HA_ERR_CRASHED_ON_REPAIR, ER_DEFAULT(ER_CRASHED_ON_REPAIR));
SETMSG(HA_ERR_CRASHED_ON_USAGE, ER_DEFAULT(ER_CRASHED_ON_USAGE));
SETMSG(HA_ERR_LOCK_WAIT_TIMEOUT, ER_DEFAULT(ER_LOCK_WAIT_TIMEOUT));
SETMSG(HA_ERR_LOCK_TABLE_FULL, ER_DEFAULT(ER_LOCK_TABLE_FULL));
SETMSG(HA_ERR_READ_ONLY_TRANSACTION, ER_DEFAULT(ER_READ_ONLY_TRANSACTION));
SETMSG(HA_ERR_LOCK_DEADLOCK, ER_DEFAULT(ER_LOCK_DEADLOCK));
SETMSG(HA_ERR_CANNOT_ADD_FOREIGN, ER_DEFAULT(ER_CANNOT_ADD_FOREIGN));
SETMSG(HA_ERR_NO_REFERENCED_ROW, ER_DEFAULT(ER_NO_REFERENCED_ROW_2));
SETMSG(HA_ERR_ROW_IS_REFERENCED, ER_DEFAULT(ER_ROW_IS_REFERENCED_2));
SETMSG(HA_ERR_NO_SAVEPOINT, "No savepoint with that name");
SETMSG(HA_ERR_NON_UNIQUE_BLOCK_SIZE, "Non unique key block size");
SETMSG(HA_ERR_NO_SUCH_TABLE, "No such table: '%.64s'");
SETMSG(HA_ERR_TABLE_EXIST, ER_DEFAULT(ER_TABLE_EXISTS_ERROR));
SETMSG(HA_ERR_NO_CONNECTION, "Could not connect to storage engine");
SETMSG(HA_ERR_TABLE_DEF_CHANGED, ER_DEFAULT(ER_TABLE_DEF_CHANGED));
SETMSG(HA_ERR_FOREIGN_DUPLICATE_KEY, "FK constraint would lead to duplicate key");
SETMSG(HA_ERR_TABLE_NEEDS_UPGRADE, ER_DEFAULT(ER_TABLE_NEEDS_UPGRADE));
SETMSG(HA_ERR_TABLE_READONLY, ER_DEFAULT(ER_OPEN_AS_READONLY));
SETMSG(HA_ERR_AUTOINC_READ_FAILED, ER_DEFAULT(ER_AUTOINC_READ_FAILED));
SETMSG(HA_ERR_AUTOINC_ERANGE, ER_DEFAULT(ER_WARN_DATA_OUT_OF_RANGE));
SETMSG(HA_ERR_TOO_MANY_CONCURRENT_TRXS, ER_DEFAULT(ER_TOO_MANY_CONCURRENT_TRXS));
SETMSG(HA_ERR_INDEX_COL_TOO_LONG, ER_DEFAULT(ER_INDEX_COLUMN_TOO_LONG));
SETMSG(HA_ERR_INDEX_CORRUPT, ER_DEFAULT(ER_INDEX_CORRUPT));
SETMSG(HA_FTS_INVALID_DOCID, "Invalid InnoDB FTS Doc ID");
SETMSG(HA_ERR_TABLE_IN_FK_CHECK, ER_DEFAULT(ER_TABLE_IN_FK_CHECK));
SETMSG(HA_ERR_TABLESPACE_EXISTS, "Tablespace already exists");
SETMSG(HA_ERR_TABLESPACE_MISSING, ER_DEFAULT(ER_TABLESPACE_MISSING));
SETMSG(HA_ERR_FTS_EXCEED_RESULT_CACHE_LIMIT, "FTS query exceeds result cache limit");
SETMSG(HA_ERR_TEMP_FILE_WRITE_FAILURE, ER_DEFAULT(ER_TEMP_FILE_WRITE_FAILURE));
SETMSG(HA_ERR_INNODB_FORCED_RECOVERY, ER_DEFAULT(ER_INNODB_FORCED_RECOVERY));
SETMSG(HA_ERR_FTS_TOO_MANY_WORDS_IN_PHRASE, "Too many words in a FTS phrase or proximity search");
SETMSG(HA_ERR_TABLE_CORRUPT, ER_DEFAULT(ER_TABLE_CORRUPT));
SETMSG(HA_ERR_TABLESPACE_MISSING, ER_DEFAULT(ER_TABLESPACE_MISSING));
SETMSG(HA_ERR_TABLESPACE_IS_NOT_EMPTY, ER_DEFAULT(ER_TABLESPACE_IS_NOT_EMPTY));
SETMSG(HA_ERR_WRONG_FILE_NAME, ER_DEFAULT(ER_WRONG_FILE_NAME));
SETMSG(HA_ERR_NOT_ALLOWED_COMMAND, ER_DEFAULT(ER_NOT_ALLOWED_COMMAND));
SETMSG(HA_ERR_COMPUTE_FAILED, "Compute virtual column value failed");
/* Register the error messages for use with my_error(). */
return my_error_register(get_handler_errmsg, HA_ERR_FIRST, HA_ERR_LAST);
}
int ha_finalize_handlerton(st_plugin_int *plugin)
{
handlerton *hton= (handlerton *)plugin->data;
DBUG_ENTER("ha_finalize_handlerton");
/* hton can be NULL here, if ha_initialize_handlerton() failed. */
if (!hton)
goto end;
switch (hton->state)
{
case SHOW_OPTION_NO:
case SHOW_OPTION_DISABLED:
break;
case SHOW_OPTION_YES:
if (installed_htons[hton->db_type] == hton)
installed_htons[hton->db_type]= NULL;
break;
};
if (hton->panic)
hton->panic(hton, HA_PANIC_CLOSE);
if (plugin->plugin->deinit)
{
/*
Today we have no defined/special behavior for uninstalling
engine plugins.
*/
DBUG_PRINT("info", ("Deinitializing plugin: '%s'", plugin->name.str));
if (plugin->plugin->deinit(NULL))
{
DBUG_PRINT("warning", ("Plugin '%s' deinit function returned error.",
plugin->name.str));
}
}
/*
In case a plugin is uninstalled and re-installed later, it should
reuse an array slot. Otherwise the number of uninstall/install
cycles would be limited.
*/
if (hton->slot != HA_SLOT_UNDEF)
{
/* Make sure we are not unpluging another plugin */
DBUG_ASSERT(hton2plugin[hton->slot] == plugin);
DBUG_ASSERT(hton->slot < MAX_HA);
hton2plugin[hton->slot]= NULL;
builtin_htons[hton->slot]= false; /* Extra correctness. */
}
my_free(hton);
end:
DBUG_RETURN(0);
}
int ha_initialize_handlerton(st_plugin_int *plugin)
{
handlerton *hton;
DBUG_ENTER("ha_initialize_handlerton");
DBUG_PRINT("plugin", ("initialize plugin: '%s'", plugin->name.str));
hton= (handlerton *)my_malloc(key_memory_handlerton,
sizeof(handlerton),
MYF(MY_WME | MY_ZEROFILL));
if (hton == NULL)
{
sql_print_error("Unable to allocate memory for plugin '%s' handlerton.",
plugin->name.str);
goto err_no_hton_memory;
}
hton->slot= HA_SLOT_UNDEF;
/* Historical Requirement */
plugin->data= hton; // shortcut for the future
if (plugin->plugin->init && plugin->plugin->init(hton))
{
sql_print_error("Plugin '%s' init function returned error.",
plugin->name.str);
goto err;
}
/*
the switch below and hton->state should be removed when
command-line options for plugins will be implemented
*/
DBUG_PRINT("info", ("hton->state=%d", hton->state));
switch (hton->state) {
case SHOW_OPTION_NO:
break;
case SHOW_OPTION_YES:
{
uint tmp;
ulong fslot;
/* now check the db_type for conflict */
if (hton->db_type <= DB_TYPE_UNKNOWN ||
hton->db_type >= DB_TYPE_DEFAULT ||
installed_htons[hton->db_type])
{
int idx= (int) DB_TYPE_FIRST_DYNAMIC;
while (idx < (int) DB_TYPE_DEFAULT && installed_htons[idx])
idx++;
if (idx == (int) DB_TYPE_DEFAULT)
{
sql_print_warning("Too many storage engines!");
goto err_deinit;
}
if (hton->db_type != DB_TYPE_UNKNOWN)
sql_print_warning("Storage engine '%s' has conflicting typecode. "
"Assigning value %d.", plugin->plugin->name, idx);
hton->db_type= (enum legacy_db_type) idx;
}
/*
In case a plugin is uninstalled and re-installed later, it should
reuse an array slot. Otherwise the number of uninstall/install
cycles would be limited. So look for a free slot.
*/
DBUG_PRINT("plugin", ("total_ha: %lu", total_ha));
for (fslot= 0; fslot < total_ha; fslot++)
{
if (!hton2plugin[fslot])
break;
}
if (fslot < total_ha)
hton->slot= fslot;
else
{
if (total_ha >= MAX_HA)
{
sql_print_error("Too many plugins loaded. Limit is %lu. "
"Failed on '%s'", (ulong) MAX_HA, plugin->name.str);
goto err_deinit;
}
hton->slot= total_ha++;
}
installed_htons[hton->db_type]= hton;
tmp= hton->savepoint_offset;
hton->savepoint_offset= savepoint_alloc_size;
savepoint_alloc_size+= tmp;
hton2plugin[hton->slot]=plugin;
builtin_htons[hton->slot]= (plugin->plugin_dl == NULL);
if (hton->prepare)
total_ha_2pc++;
break;
}
/* fall through */
default:
hton->state= SHOW_OPTION_DISABLED;
break;
}
/*
This is entirely for legacy. We will create a new "disk based" hton and a
"memory" hton which will be configurable longterm. We should be able to
remove partition and myisammrg.
*/
switch (hton->db_type) {
case DB_TYPE_HEAP:
heap_hton= hton;
break;
case DB_TYPE_MYISAM:
myisam_hton= hton;
break;
case DB_TYPE_INNODB:
innodb_hton= hton;
break;
default:
break;
};
/*
Re-load the optimizer cost constants since this storage engine can
have non-default cost constants.
*/
reload_optimizer_cost_constants();
DBUG_RETURN(0);
err_deinit:
/*
Let plugin do its inner deinitialization as plugin->init()
was successfully called before.
*/
if (plugin->plugin->deinit)
(void) plugin->plugin->deinit(NULL);
err:
my_free(hton);
err_no_hton_memory:
plugin->data= NULL;
DBUG_RETURN(1);
}
int ha_init()
{
int error= 0;
DBUG_ENTER("ha_init");
DBUG_ASSERT(total_ha < MAX_HA);
/*
Check if there is a transaction-capable storage engine besides the
binary log (which is considered a transaction-capable storage engine in
counting total_ha)
*/
opt_using_transactions= total_ha>(ulong)opt_bin_log;
savepoint_alloc_size+= sizeof(SAVEPOINT);
/*
Initialize system database name cache.
This cache is used to do a quick check if a given
db.tablename is a system table.
*/
known_system_databases= ha_known_system_databases();
DBUG_RETURN(error);
}
void ha_end()
{
// Unregister handler error messages.
my_error_unregister(HA_ERR_FIRST, HA_ERR_LAST);
my_free(handler_errmsgs);
}
static my_bool dropdb_handlerton(THD *unused1, plugin_ref plugin,
void *path)
{
handlerton *hton= plugin_data<handlerton*>(plugin);
if (hton->state == SHOW_OPTION_YES && hton->drop_database)
hton->drop_database(hton, (char *)path);
return FALSE;
}