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mariadb/sql/sql_insert.cc
unknown 7b51154461 Support for TIMESTAMP columns holding NULL values. Unlike all other 
column types TIMESTAMP is NOT NULL by default, so in order to have 
TIMESTAMP column holding NULL valaues you have to specify NULL as
one of its attributes (this needed for backward compatibility).

Main changes:
Replaced TABLE::timestamp_default_now/on_update_now members with
TABLE::timestamp_auto_set_type flag which is used everywhere
for determining if we should auto-set value of TIMESTAMP field 
during this operation or not. We are also use Field_timestamp::set_time()
instead of handler::update_timestamp() in handlers.


mysql-test/r/type_timestamp.result:
  Added test for TIMESTAMP columns which are able to store NULL values.
mysql-test/t/type_timestamp.test:
  Added test for TIMESTAMP columns which are able to store NULL values.
sql/field.cc:
  Added support for TIMESTAMP fields holding NULL values.
  We don't need Field_timestamp::set_timestamp_offsets() anymore.
  Instead we need Field_timestamp::get_auto_set_type() function
  which will convert TIMESTAMP auto-set type stored in Field in 
  unireg_check to value from timestamp_auto_set_type_enum.
  (We can't replace this function with additional Field_timestamp member
  and some code in constructor because then we will have troubles
  with Field::new_field() method).
  We should also set field to not null in Field_timestamp::set_time() now.
sql/field.h:
  Added support for TIMESTAMP fields holding NULL values.
  We don't need Field_timestamp::set_timestamp_offsets() anymore.
  Instead we need Field_timestamp::get_auto_set_type() function,
  which will convert TIMESTAMP auto-set type stored in Field in 
  unireg_check to value from timestamp_auto_set_type_enum.
  We also have to support NULL values in Field_timestamp::get_timestamp()
  function.
sql/field_conv.cc:
  Added comment clarifying behavior in case of TIMESTAMP fields which are
  able to store NULL values.
sql/ha_berkeley.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_heap.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_innodb.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_isam.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_isammrg.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_myisam.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_myisammrg.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/ha_ndbcluster.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now for determining 
  if we should auto-set value of TIMESTAMP field during this operation.
  We are also use Field_timestamp::set_time() instead of 
  handler::update_timestamp().
sql/handler.cc:
  handler::update_timestamp() is no longer needed since now we use
  Field_timestamp::set_time() instead.
  (we can't use handler::update_timestamp() anyway since field position
  only is not enough for TIMESTAMP fields which are able to store NULLs)
sql/handler.h:
  handler::update_timestamp() is no longer needed since now we use
  Field_timestamp::set_time() instead.
sql/item_timefunc.cc:
  Since now TIMESTAMP fields can hold NULL values we should take this into
  account.
sql/sql_base.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now. 
  (Here we use Field_timestamp::get_auto_set_type() to setup its value
   before further statement execution).
sql/sql_insert.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_load.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_parse.cc:
  Added support for TIMESTAMP fields holding NULL values.
  We should distinguish NULL default values and non-specified default
  values for such fields (because latter could mean DEFAULT NOW()
  ON UPDATE NOW() in some cases).
sql/sql_show.cc:
  Added support for TIMESTAMP fields holding NULL values.
  Unlike all other fields these are NOT NULL by default
  so we have to specify NULL attribute explicitly for them.
sql/sql_table.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_update.cc:
  Now we use TABLE::timestamp_field_type instead of 
  TABLE::timestamp_default_now/on_update_now.
sql/sql_yacc.yy:
  Added support for TIMESTAMP fields holding NULL values.
  Unlike all other fields these are NOT NULL by default
  (so we have to set NOT_NULL_FLAG properly for them).
sql/table.h:
  Added timestamp_auto_set_type enum which values are used for indicating
  during which operations we should automatically set TIMESTAPM field
  value to current timestamp.
  TABLE: Replaced timestamp_default_now/on_update_now members with
  timestamp_auto_set_type flag (Now when TIMESTAMP field are able to 
  store NULL values, single position of field in record is not enough 
  for updating this field anyway).
2004-10-01 18:54:06 +04:00

1728 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 */
/* Insert of records */
#include "mysql_priv.h"
#include "sql_acl.h"
static int check_null_fields(THD *thd,TABLE *entry);
#ifndef EMBEDDED_LIBRARY
static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list);
static int write_delayed(THD *thd,TABLE *table, enum_duplicates dup,
char *query, uint query_length, int log_on);
static void end_delayed_insert(THD *thd);
extern "C" pthread_handler_decl(handle_delayed_insert,arg);
static void unlink_blobs(register TABLE *table);
#endif
/* Define to force use of my_malloc() if the allocated memory block is big */
#ifndef HAVE_ALLOCA
#define my_safe_alloca(size, min_length) my_alloca(size)
#define my_safe_afree(ptr, size, min_length) my_afree(ptr)
#else
#define my_safe_alloca(size, min_length) ((size <= min_length) ? my_alloca(size) : my_malloc(size,MYF(0)))
#define my_safe_afree(ptr, size, min_length) if (size > min_length) my_free(ptr,MYF(0))
#endif
#define DELAYED_LOG_UPDATE 1
#define DELAYED_LOG_BIN 2
/*
Check if insert fields are correct.
Sets table->timestamp_field_type to TIMESTAMP_NO_AUTO_SET or leaves it
as is, depending on if timestamp should be updated or not.
*/
int
check_insert_fields(THD *thd,TABLE *table,List<Item> &fields,
List<Item> &values, ulong counter)
{
if (fields.elements == 0 && values.elements != 0)
{
if (values.elements != table->fields)
{
my_printf_error(ER_WRONG_VALUE_COUNT_ON_ROW,
ER(ER_WRONG_VALUE_COUNT_ON_ROW),
MYF(0),counter);
return -1;
}
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (grant_option &&
check_grant_all_columns(thd,INSERT_ACL,table))
return -1;
#endif
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
}
else
{ // Part field list
if (fields.elements != values.elements)
{
my_printf_error(ER_WRONG_VALUE_COUNT_ON_ROW,
ER(ER_WRONG_VALUE_COUNT_ON_ROW),
MYF(0),counter);
return -1;
}
TABLE_LIST table_list;
bzero((char*) &table_list,sizeof(table_list));
table_list.db= table->table_cache_key;
table_list.real_name= table_list.alias= table->table_name;
table_list.table=table;
table_list.grant=table->grant;
thd->dupp_field=0;
if (setup_tables(&table_list) ||
setup_fields(thd, 0, &table_list,fields,1,0,0))
return -1;
if (thd->dupp_field)
{
my_error(ER_FIELD_SPECIFIED_TWICE,MYF(0), thd->dupp_field->field_name);
return -1;
}
if (table->timestamp_field && // Don't set timestamp if used
table->timestamp_field->query_id == thd->query_id)
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
}
// For the values we need select_priv
#ifndef NO_EMBEDDED_ACCESS_CHECKS
table->grant.want_privilege=(SELECT_ACL & ~table->grant.privilege);
#endif
return 0;
}
int mysql_insert(THD *thd,TABLE_LIST *table_list,
List<Item> &fields,
List<List_item> &values_list,
List<Item> &update_fields,
List<Item> &update_values,
enum_duplicates duplic)
{
int error, res;
/*
log_on is about delayed inserts only.
By default, both logs are enabled (this won't cause problems if the server
runs without --log-update or --log-bin).
*/
int log_on= DELAYED_LOG_UPDATE | DELAYED_LOG_BIN ;
bool transactional_table, log_delayed;
uint value_count;
ulong counter = 1;
ulonglong id;
COPY_INFO info;
TABLE *table;
List_iterator_fast<List_item> its(values_list);
List_item *values;
#ifndef EMBEDDED_LIBRARY
char *query= thd->query;
#endif
thr_lock_type lock_type = table_list->lock_type;
TABLE_LIST *insert_table_list= (TABLE_LIST*)
thd->lex->select_lex.table_list.first;
DBUG_ENTER("mysql_insert");
if (!(thd->options & OPTION_UPDATE_LOG))
log_on&= ~(int) DELAYED_LOG_UPDATE;
if (!(thd->options & OPTION_BIN_LOG))
log_on&= ~(int) DELAYED_LOG_BIN;
/*
in safe mode or with skip-new change delayed insert to be regular
if we are told to replace duplicates, the insert cannot be concurrent
delayed insert changed to regular in slave thread
*/
#ifdef EMBEDDED_LIBRARY
if (lock_type == TL_WRITE_DELAYED)
lock_type=TL_WRITE;
#else
if ((lock_type == TL_WRITE_DELAYED &&
((specialflag & (SPECIAL_NO_NEW_FUNC | SPECIAL_SAFE_MODE)) ||
thd->slave_thread || !thd->variables.max_insert_delayed_threads)) ||
(lock_type == TL_WRITE_CONCURRENT_INSERT && duplic == DUP_REPLACE) ||
(duplic == DUP_UPDATE))
lock_type=TL_WRITE;
#endif
table_list->lock_type= lock_type;
#ifndef EMBEDDED_LIBRARY
if (lock_type == TL_WRITE_DELAYED)
{
if (thd->locked_tables)
{
if (find_locked_table(thd,
table_list->db ? table_list->db : thd->db,
table_list->real_name))
{
my_printf_error(ER_DELAYED_INSERT_TABLE_LOCKED,
ER(ER_DELAYED_INSERT_TABLE_LOCKED),
MYF(0), table_list->real_name);
DBUG_RETURN(-1);
}
}
if ((table= delayed_get_table(thd,table_list)) && !thd->is_fatal_error)
{
res= 0;
if (table_list->next) /* if sub select */
res= open_and_lock_tables(thd, table_list->next);
}
else
{
/* Too many delayed insert threads; Use a normal insert */
table_list->lock_type= lock_type= TL_WRITE;
res= open_and_lock_tables(thd, table_list);
}
}
else
#endif /* EMBEDDED_LIBRARY */
res= open_and_lock_tables(thd, table_list);
if (res || thd->is_fatal_error)
DBUG_RETURN(-1);
table= table_list->table;
thd->proc_info="init";
thd->used_tables=0;
values= its++;
if (duplic == DUP_UPDATE && !table->insert_values)
{
/* it should be allocated before Item::fix_fields() */
table->insert_values=
(byte *)alloc_root(&thd->mem_root, table->rec_buff_length);
if (!table->insert_values)
goto abort;
}
if (mysql_prepare_insert(thd, table_list, insert_table_list, table,
fields, values, update_fields,
update_values, duplic))
goto abort;
value_count= values->elements;
while ((values= its++))
{
counter++;
if (values->elements != value_count)
{
my_printf_error(ER_WRONG_VALUE_COUNT_ON_ROW,
ER(ER_WRONG_VALUE_COUNT_ON_ROW),
MYF(0),counter);
goto abort;
}
if (setup_fields(thd, 0, insert_table_list, *values, 0, 0, 0))
goto abort;
}
its.rewind ();
/*
Fill in the given fields and dump it to the table file
*/
info.records= info.deleted= info.copied= info.updated= 0;
info.handle_duplicates=duplic;
info.update_fields=&update_fields;
info.update_values=&update_values;
/*
Count warnings for all inserts.
For single line insert, generate an error if try to set a NOT NULL field
to NULL
*/
thd->count_cuted_fields= ((values_list.elements == 1) ?
CHECK_FIELD_ERROR_FOR_NULL :
CHECK_FIELD_WARN);
thd->cuted_fields = 0L;
table->next_number_field=table->found_next_number_field;
error=0;
id=0;
thd->proc_info="update";
if (duplic != DUP_ERROR)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
/*
let's *try* to start bulk inserts. It won't necessary
start them as values_list.elements should be greater than
some - handler dependent - threshold.
So we call start_bulk_insert to perform nesessary checks on
values_list.elements, and - if nothing else - to initialize
the code to make the call of end_bulk_insert() below safe.
*/
if (lock_type != TL_WRITE_DELAYED)
table->file->start_bulk_insert(values_list.elements);
while ((values= its++))
{
if (fields.elements || !value_count)
{
restore_record(table,default_values); // Get empty record
if (fill_record(fields, *values, 0)|| thd->net.report_error ||
check_null_fields(thd,table))
{
if (values_list.elements != 1 && !thd->net.report_error)
{
info.records++;
continue;
}
error=1;
break;
}
}
else
{
if (thd->used_tables) // Column used in values()
restore_record(table,default_values); // Get empty record
else
table->record[0][0]=table->default_values[0]; // Fix delete marker
if (fill_record(table->field,*values, 0) || thd->net.report_error)
{
if (values_list.elements != 1 && ! thd->net.report_error)
{
info.records++;
continue;
}
error=1;
break;
}
}
#ifndef EMBEDDED_LIBRARY
if (lock_type == TL_WRITE_DELAYED)
{
error=write_delayed(thd,table,duplic,query, thd->query_length, log_on);
query=0;
}
else
#endif
error=write_record(table,&info);
if (error)
break;
/*
If auto_increment values are used, save the first one
for LAST_INSERT_ID() and for the update log.
We can't use insert_id() as we don't want to touch the
last_insert_id_used flag.
*/
if (! id && thd->insert_id_used)
{ // Get auto increment value
id= thd->last_insert_id;
}
thd->row_count++;
}
/*
Now all rows are inserted. Time to update logs and sends response to
user
*/
#ifndef EMBEDDED_LIBRARY
if (lock_type == TL_WRITE_DELAYED)
{
if (!error)
{
id=0; // No auto_increment id
info.copied=values_list.elements;
end_delayed_insert(thd);
}
query_cache_invalidate3(thd, table_list, 1);
}
else
#endif
{
if (table->file->end_bulk_insert() && !error)
{
table->file->print_error(my_errno,MYF(0));
error=1;
}
if (id && values_list.elements != 1)
thd->insert_id(id); // For update log
else if (table->next_number_field && info.copied)
id=table->next_number_field->val_int(); // Return auto_increment value
/*
Invalidate the table in the query cache if something changed.
For the transactional algorithm to work the invalidation must be
before binlog writing and ha_autocommit_...
*/
if (info.copied || info.deleted || info.updated)
query_cache_invalidate3(thd, table_list, 1);
transactional_table= table->file->has_transactions();
log_delayed= (transactional_table || table->tmp_table);
if ((info.copied || info.deleted || info.updated) &&
(error <= 0 || !transactional_table))
{
mysql_update_log.write(thd, thd->query, thd->query_length);
if (mysql_bin_log.is_open())
{
if (error <= 0)
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length,
log_delayed);
if (mysql_bin_log.write(&qinfo) && transactional_table)
error=1;
}
if (!log_delayed)
thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
}
if (transactional_table)
error=ha_autocommit_or_rollback(thd,error);
if (thd->lock)
{
mysql_unlock_tables(thd, thd->lock);
thd->lock=0;
}
}
thd->proc_info="end";
table->next_number_field=0;
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
thd->next_insert_id=0; // Reset this if wrongly used
if (duplic != DUP_ERROR)
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
/* Reset value of LAST_INSERT_ID if no rows where inserted */
if (!info.copied && thd->insert_id_used)
{
thd->insert_id(0);
id=0;
}
if (error)
goto abort;
if (values_list.elements == 1 && (!(thd->options & OPTION_WARNINGS) ||
!thd->cuted_fields))
send_ok(thd,info.copied+info.deleted+info.updated,id);
else
{
char buff[160];
if (duplic == DUP_IGNORE)
sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
(lock_type == TL_WRITE_DELAYED) ? (ulong) 0 :
(ulong) (info.records - info.copied), (ulong) thd->cuted_fields);
else
sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
(ulong) (info.deleted+info.updated), (ulong) thd->cuted_fields);
::send_ok(thd,info.copied+info.deleted+info.updated,(ulonglong)id,buff);
}
free_underlaid_joins(thd, &thd->lex->select_lex);
table->insert_values=0;
DBUG_RETURN(0);
abort:
#ifndef EMBEDDED_LIBRARY
if (lock_type == TL_WRITE_DELAYED)
end_delayed_insert(thd);
#endif
free_underlaid_joins(thd, &thd->lex->select_lex);
table->insert_values=0;
DBUG_RETURN(-1);
}
/*
Prepare items in INSERT statement
SYNOPSIS
mysql_prepare_insert()
thd - thread handler
table_list - global table list
insert_table_list - local table list of INSERT SELECT_LEX
RETURN VALUE
0 - OK
-1 - error (message is not sent to user)
*/
int mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
TABLE_LIST *insert_table_list, TABLE *table,
List<Item> &fields, List_item *values,
List<Item> &update_fields, List<Item> &update_values,
enum_duplicates duplic)
{
DBUG_ENTER("mysql_prepare_insert");
if (check_insert_fields(thd, table, fields, *values, 1) ||
setup_tables(insert_table_list) ||
setup_fields(thd, 0, insert_table_list, *values, 0, 0, 0) ||
(duplic == DUP_UPDATE &&
(setup_fields(thd, 0, insert_table_list, update_fields, 0, 0, 0) ||
setup_fields(thd, 0, insert_table_list, update_values, 0, 0, 0))))
DBUG_RETURN(-1);
if (find_real_table_in_list(table_list->next,
table_list->db, table_list->real_name))
{
my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
DBUG_RETURN(-1);
}
DBUG_RETURN(0);
}
/* Check if there is more uniq keys after field */
static int last_uniq_key(TABLE *table,uint keynr)
{
while (++keynr < table->keys)
if (table->key_info[keynr].flags & HA_NOSAME)
return 0;
return 1;
}
/*
Write a record to table with optional deleting of conflicting records
*/
int write_record(TABLE *table,COPY_INFO *info)
{
int error;
char *key=0;
DBUG_ENTER("write_record");
info->records++;
if (info->handle_duplicates == DUP_REPLACE ||
info->handle_duplicates == DUP_UPDATE)
{
while ((error=table->file->write_row(table->record[0])))
{
if (error != HA_WRITE_SKIP)
goto err;
uint key_nr;
if ((int) (key_nr = table->file->get_dup_key(error)) < 0)
{
error=HA_WRITE_SKIP; /* Database can't find key */
goto err;
}
/*
Don't allow REPLACE to replace a row when a auto_increment column
was used. This ensures that we don't get a problem when the
whole range of the key has been used.
*/
if (info->handle_duplicates == DUP_REPLACE &&
table->next_number_field &&
key_nr == table->next_number_index &&
table->file->auto_increment_column_changed)
goto err;
if (table->file->table_flags() & HA_DUPP_POS)
{
if (table->file->rnd_pos(table->record[1],table->file->dupp_ref))
goto err;
}
else
{
if (table->file->extra(HA_EXTRA_FLUSH_CACHE)) /* Not needed with NISAM */
{
error=my_errno;
goto err;
}
if (!key)
{
if (!(key=(char*) my_safe_alloca(table->max_unique_length,
MAX_KEY_LENGTH)))
{
error=ENOMEM;
goto err;
}
}
key_copy((byte*) key,table,key_nr,0);
if ((error=(table->file->index_read_idx(table->record[1],key_nr,
(byte*) key,
table->key_info[key_nr].
key_length,
HA_READ_KEY_EXACT))))
goto err;
}
if (info->handle_duplicates == DUP_UPDATE)
{
/* we don't check for other UNIQUE keys - the first row
that matches, is updated. If update causes a conflict again,
an error is returned
*/
store_record(table,insert_values);
restore_record(table,record[1]);
if (fill_record(*info->update_fields, *info->update_values, 0))
goto err;
if ((error=table->file->update_row(table->record[1],table->record[0])))
goto err;
info->updated++;
break;
}
else /* DUP_REPLACE */
{
/*
The manual defines the REPLACE semantics that it is either
an INSERT or DELETE(s) + INSERT; FOREIGN KEY checks in
InnoDB do not function in the defined way if we allow MySQL
to convert the latter operation internally to an UPDATE.
We also should not perform this conversion if we have
timestamp field with ON UPDATE which is different from DEFAULT.
*/
if (last_uniq_key(table,key_nr) &&
!table->file->referenced_by_foreign_key() &&
(table->timestamp_field_type == TIMESTAMP_NO_AUTO_SET ||
table->timestamp_field_type == TIMESTAMP_AUTO_SET_ON_BOTH))
{
if ((error=table->file->update_row(table->record[1],
table->record[0])))
goto err;
info->deleted++;
break; /* Update logfile and count */
}
else if ((error=table->file->delete_row(table->record[1])))
goto err;
info->deleted++;
}
}
info->copied++;
}
else if ((error=table->file->write_row(table->record[0])))
{
if (info->handle_duplicates != DUP_IGNORE ||
(error != HA_ERR_FOUND_DUPP_KEY && error != HA_ERR_FOUND_DUPP_UNIQUE))
goto err;
}
else
info->copied++;
if (key)
my_safe_afree(key,table->max_unique_length,MAX_KEY_LENGTH);
DBUG_RETURN(0);
err:
if (key)
my_afree(key);
info->last_errno= error;
table->file->print_error(error,MYF(0));
DBUG_RETURN(1);
}
/******************************************************************************
Check that all fields with arn't null_fields are used
If DONT_USE_DEFAULT_FIELDS isn't defined use default value for not set
fields.
******************************************************************************/
static int check_null_fields(THD *thd __attribute__((unused)),
TABLE *entry __attribute__((unused)))
{
#ifdef DONT_USE_DEFAULT_FIELDS
for (Field **field=entry->field ; *field ; field++)
{
if ((*field)->query_id != thd->query_id && !(*field)->maybe_null() &&
*field != entry->timestamp_field &&
*field != entry->next_number_field)
{
my_printf_error(ER_BAD_NULL_ERROR, ER(ER_BAD_NULL_ERROR),MYF(0),
(*field)->field_name);
return 1;
}
}
#endif
return 0;
}
/*****************************************************************************
Handling of delayed inserts
A thread is created for each table that one uses with the DELAYED attribute.
*****************************************************************************/
#ifndef EMBEDDED_LIBRARY
class delayed_row :public ilink {
public:
char *record,*query;
enum_duplicates dup;
time_t start_time;
bool query_start_used,last_insert_id_used,insert_id_used;
int log_query;
ulonglong last_insert_id;
timestamp_auto_set_type timestamp_field_type;
uint query_length;
delayed_row(enum_duplicates dup_arg, int log_query_arg)
:record(0),query(0),dup(dup_arg),log_query(log_query_arg) {}
~delayed_row()
{
x_free(record);
}
};
class delayed_insert :public ilink {
uint locks_in_memory;
public:
THD thd;
TABLE *table;
pthread_mutex_t mutex;
pthread_cond_t cond,cond_client;
volatile uint tables_in_use,stacked_inserts;
volatile bool status,dead;
COPY_INFO info;
I_List<delayed_row> rows;
uint group_count;
TABLE_LIST table_list; // Argument
delayed_insert()
:locks_in_memory(0),
table(0),tables_in_use(0),stacked_inserts(0), status(0), dead(0),
group_count(0)
{
thd.user=thd.priv_user=(char*) delayed_user;
thd.host=(char*) my_localhost;
thd.current_tablenr=0;
thd.version=refresh_version;
thd.command=COM_DELAYED_INSERT;
thd.lex->current_select= 0; /* for my_message_sql */
bzero((char*) &thd.net, sizeof(thd.net)); // Safety
bzero((char*) &table_list, sizeof(table_list)); // Safety
thd.system_thread= SYSTEM_THREAD_DELAYED_INSERT;
thd.host_or_ip= "";
bzero((char*) &info,sizeof(info));
pthread_mutex_init(&mutex,MY_MUTEX_INIT_FAST);
pthread_cond_init(&cond,NULL);
pthread_cond_init(&cond_client,NULL);
VOID(pthread_mutex_lock(&LOCK_thread_count));
delayed_insert_threads++;
VOID(pthread_mutex_unlock(&LOCK_thread_count));
}
~delayed_insert()
{
/* The following is not really needed, but just for safety */
delayed_row *row;
while ((row=rows.get()))
delete row;
if (table)
close_thread_tables(&thd);
VOID(pthread_mutex_lock(&LOCK_thread_count));
pthread_mutex_destroy(&mutex);
pthread_cond_destroy(&cond);
pthread_cond_destroy(&cond_client);
thd.unlink(); // Must be unlinked under lock
x_free(thd.query);
thd.user=thd.host=0;
thread_count--;
delayed_insert_threads--;
VOID(pthread_mutex_unlock(&LOCK_thread_count));
VOID(pthread_cond_broadcast(&COND_thread_count)); /* Tell main we are ready */
}
/* The following is for checking when we can delete ourselves */
inline void lock()
{
locks_in_memory++; // Assume LOCK_delay_insert
}
void unlock()
{
pthread_mutex_lock(&LOCK_delayed_insert);
if (!--locks_in_memory)
{
pthread_mutex_lock(&mutex);
if (thd.killed && ! stacked_inserts && ! tables_in_use)
{
pthread_cond_signal(&cond);
status=1;
}
pthread_mutex_unlock(&mutex);
}
pthread_mutex_unlock(&LOCK_delayed_insert);
}
inline uint lock_count() { return locks_in_memory; }
TABLE* get_local_table(THD* client_thd);
bool handle_inserts(void);
};
I_List<delayed_insert> delayed_threads;
delayed_insert *find_handler(THD *thd, TABLE_LIST *table_list)
{
thd->proc_info="waiting for delay_list";
pthread_mutex_lock(&LOCK_delayed_insert); // Protect master list
I_List_iterator<delayed_insert> it(delayed_threads);
delayed_insert *tmp;
while ((tmp=it++))
{
if (!strcmp(tmp->thd.db,table_list->db) &&
!strcmp(table_list->real_name,tmp->table->real_name))
{
tmp->lock();
break;
}
}
pthread_mutex_unlock(&LOCK_delayed_insert); // For unlink from list
return tmp;
}
static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
{
int error;
delayed_insert *tmp;
DBUG_ENTER("delayed_get_table");
if (!table_list->db)
table_list->db=thd->db;
/* no match; create a new thread to handle the table */
if (!(tmp=find_handler(thd,table_list)))
{
/* Don't create more than max_insert_delayed_threads */
if (delayed_insert_threads >= thd->variables.max_insert_delayed_threads)
DBUG_RETURN(0);
thd->proc_info="Creating delayed handler";
pthread_mutex_lock(&LOCK_delayed_create);
if (!(tmp=find_handler(thd,table_list))) // Was just created
{
if (!(tmp=new delayed_insert()))
{
thd->fatal_error();
my_error(ER_OUTOFMEMORY,MYF(0),sizeof(delayed_insert));
pthread_mutex_unlock(&LOCK_delayed_create);
DBUG_RETURN(0);
}
pthread_mutex_lock(&LOCK_thread_count);
thread_count++;
pthread_mutex_unlock(&LOCK_thread_count);
if (!(tmp->thd.db=my_strdup(table_list->db,MYF(MY_WME))) ||
!(tmp->thd.query=my_strdup(table_list->real_name,MYF(MY_WME))))
{
delete tmp;
thd->fatal_error();
my_error(ER_OUT_OF_RESOURCES,MYF(0));
pthread_mutex_unlock(&LOCK_delayed_create);
DBUG_RETURN(0);
}
tmp->table_list= *table_list; // Needed to open table
tmp->table_list.db= tmp->thd.db;
tmp->table_list.alias= tmp->table_list.real_name=tmp->thd.query;
tmp->lock();
pthread_mutex_lock(&tmp->mutex);
if ((error=pthread_create(&tmp->thd.real_id,&connection_attrib,
handle_delayed_insert,(void*) tmp)))
{
DBUG_PRINT("error",
("Can't create thread to handle delayed insert (error %d)",
error));
pthread_mutex_unlock(&tmp->mutex);
tmp->unlock();
delete tmp;
thd->fatal_error();
pthread_mutex_unlock(&LOCK_delayed_create);
net_printf(thd,ER_CANT_CREATE_THREAD,error);
DBUG_RETURN(0);
}
/* Wait until table is open */
thd->proc_info="waiting for handler open";
while (!tmp->thd.killed && !tmp->table && !thd->killed)
{
pthread_cond_wait(&tmp->cond_client,&tmp->mutex);
}
pthread_mutex_unlock(&tmp->mutex);
thd->proc_info="got old table";
if (tmp->thd.killed)
{
if (tmp->thd.is_fatal_error)
{
/* Copy error message and abort */
thd->fatal_error();
strmov(thd->net.last_error,tmp->thd.net.last_error);
thd->net.last_errno=tmp->thd.net.last_errno;
}
tmp->unlock();
pthread_mutex_unlock(&LOCK_delayed_create);
DBUG_RETURN(0); // Continue with normal insert
}
if (thd->killed)
{
tmp->unlock();
pthread_mutex_unlock(&LOCK_delayed_create);
DBUG_RETURN(0);
}
}
pthread_mutex_unlock(&LOCK_delayed_create);
}
pthread_mutex_lock(&tmp->mutex);
TABLE *table=tmp->get_local_table(thd);
pthread_mutex_unlock(&tmp->mutex);
tmp->unlock();
if (table)
thd->di=tmp;
else if (tmp->thd.is_fatal_error)
thd->fatal_error();
DBUG_RETURN((table_list->table=table));
}
/*
As we can't let many threads modify the same TABLE structure, we create
an own structure for each tread. This includes a row buffer to save the
column values and new fields that points to the new row buffer.
The memory is allocated in the client thread and is freed automaticly.
*/
TABLE *delayed_insert::get_local_table(THD* client_thd)
{
my_ptrdiff_t adjust_ptrs;
Field **field,**org_field, *found_next_number_field;
TABLE *copy;
/* First request insert thread to get a lock */
status=1;
tables_in_use++;
if (!thd.lock) // Table is not locked
{
client_thd->proc_info="waiting for handler lock";
pthread_cond_signal(&cond); // Tell handler to lock table
while (!dead && !thd.lock && ! client_thd->killed)
{
pthread_cond_wait(&cond_client,&mutex);
}
client_thd->proc_info="got handler lock";
if (client_thd->killed)
goto error;
if (dead)
{
strmov(client_thd->net.last_error,thd.net.last_error);
client_thd->net.last_errno=thd.net.last_errno;
goto error;
}
}
client_thd->proc_info="allocating local table";
copy= (TABLE*) client_thd->alloc(sizeof(*copy)+
(table->fields+1)*sizeof(Field**)+
table->reclength);
if (!copy)
goto error;
*copy= *table;
bzero((char*) &copy->name_hash,sizeof(copy->name_hash)); // No name hashing
/* We don't need to change the file handler here */
field=copy->field=(Field**) (copy+1);
copy->record[0]=(byte*) (field+table->fields+1);
memcpy((char*) copy->record[0],(char*) table->record[0],table->reclength);
/* Make a copy of all fields */
adjust_ptrs=PTR_BYTE_DIFF(copy->record[0],table->record[0]);
found_next_number_field=table->found_next_number_field;
for (org_field=table->field ; *org_field ; org_field++,field++)
{
if (!(*field= (*org_field)->new_field(&client_thd->mem_root,copy)))
return 0;
(*field)->orig_table= copy; // Remove connection
(*field)->move_field(adjust_ptrs); // Point at copy->record[0]
if (*org_field == found_next_number_field)
(*field)->table->found_next_number_field= *field;
}
*field=0;
/* Adjust timestamp */
if (table->timestamp_field)
{
/* Restore offset as this may have been reset in handle_inserts */
copy->timestamp_field=
(Field_timestamp*) copy->field[table->timestamp_field_offset];
copy->timestamp_field->unireg_check= table->timestamp_field->unireg_check;
copy->timestamp_field_type= copy->timestamp_field->get_auto_set_type();
}
/* _rowid is not used with delayed insert */
copy->rowid_field=0;
/* Adjust in_use for pointing to client thread */
copy->in_use= client_thd;
return copy;
/* Got fatal error */
error:
tables_in_use--;
status=1;
pthread_cond_signal(&cond); // Inform thread about abort
return 0;
}
/* Put a question in queue */
static int write_delayed(THD *thd,TABLE *table,enum_duplicates duplic,
char *query, uint query_length, int log_on)
{
delayed_row *row=0;
delayed_insert *di=thd->di;
DBUG_ENTER("write_delayed");
thd->proc_info="waiting for handler insert";
pthread_mutex_lock(&di->mutex);
while (di->stacked_inserts >= delayed_queue_size && !thd->killed)
pthread_cond_wait(&di->cond_client,&di->mutex);
thd->proc_info="storing row into queue";
if (thd->killed || !(row= new delayed_row(duplic, log_on)))
goto err;
if (!query)
query_length=0;
if (!(row->record= (char*) my_malloc(table->reclength+query_length+1,
MYF(MY_WME))))
goto err;
memcpy(row->record,table->record[0],table->reclength);
if (query_length)
{
row->query=row->record+table->reclength;
memcpy(row->query,query,query_length+1);
}
row->query_length= query_length;
row->start_time= thd->start_time;
row->query_start_used= thd->query_start_used;
row->last_insert_id_used= thd->last_insert_id_used;
row->insert_id_used= thd->insert_id_used;
row->last_insert_id= thd->last_insert_id;
row->timestamp_field_type= table->timestamp_field_type;
di->rows.push_back(row);
di->stacked_inserts++;
di->status=1;
if (table->blob_fields)
unlink_blobs(table);
pthread_cond_signal(&di->cond);
thread_safe_increment(delayed_rows_in_use,&LOCK_delayed_status);
pthread_mutex_unlock(&di->mutex);
DBUG_RETURN(0);
err:
delete row;
pthread_mutex_unlock(&di->mutex);
DBUG_RETURN(1);
}
static void end_delayed_insert(THD *thd)
{
DBUG_ENTER("end_delayed_insert");
delayed_insert *di=thd->di;
pthread_mutex_lock(&di->mutex);
DBUG_PRINT("info",("tables in use: %d",di->tables_in_use));
if (!--di->tables_in_use || di->thd.killed)
{ // Unlock table
di->status=1;
pthread_cond_signal(&di->cond);
}
pthread_mutex_unlock(&di->mutex);
DBUG_VOID_RETURN;
}
/* We kill all delayed threads when doing flush-tables */
void kill_delayed_threads(void)
{
VOID(pthread_mutex_lock(&LOCK_delayed_insert)); // For unlink from list
I_List_iterator<delayed_insert> it(delayed_threads);
delayed_insert *tmp;
while ((tmp=it++))
{
/* Ensure that the thread doesn't kill itself while we are looking at it */
pthread_mutex_lock(&tmp->mutex);
tmp->thd.killed=1;
if (tmp->thd.mysys_var)
{
pthread_mutex_lock(&tmp->thd.mysys_var->mutex);
if (tmp->thd.mysys_var->current_cond)
{
/*
We need the following test because the main mutex may be locked
in handle_delayed_insert()
*/
if (&tmp->mutex != tmp->thd.mysys_var->current_mutex)
pthread_mutex_lock(tmp->thd.mysys_var->current_mutex);
pthread_cond_broadcast(tmp->thd.mysys_var->current_cond);
if (&tmp->mutex != tmp->thd.mysys_var->current_mutex)
pthread_mutex_unlock(tmp->thd.mysys_var->current_mutex);
}
pthread_mutex_unlock(&tmp->thd.mysys_var->mutex);
}
pthread_mutex_unlock(&tmp->mutex);
}
VOID(pthread_mutex_unlock(&LOCK_delayed_insert)); // For unlink from list
}
/*
* Create a new delayed insert thread
*/
extern "C" pthread_handler_decl(handle_delayed_insert,arg)
{
delayed_insert *di=(delayed_insert*) arg;
THD *thd= &di->thd;
pthread_detach_this_thread();
/* Add thread to THD list so that's it's visible in 'show processlist' */
pthread_mutex_lock(&LOCK_thread_count);
thd->thread_id=thread_id++;
thd->end_time();
threads.append(thd);
thd->killed=abort_loop;
pthread_mutex_unlock(&LOCK_thread_count);
pthread_mutex_lock(&di->mutex);
#if !defined( __WIN__) && !defined(OS2) /* Win32 calls this in pthread_create */
if (my_thread_init())
{
strmov(thd->net.last_error,ER(thd->net.last_errno=ER_OUT_OF_RESOURCES));
goto end;
}
#endif
DBUG_ENTER("handle_delayed_insert");
if (init_thr_lock() || thd->store_globals())
{
thd->fatal_error();
strmov(thd->net.last_error,ER(thd->net.last_errno=ER_OUT_OF_RESOURCES));
goto end;
}
#if !defined(__WIN__) && !defined(OS2) && !defined(__NETWARE__)
sigset_t set;
VOID(sigemptyset(&set)); // Get mask in use
VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif
/* open table */
if (!(di->table=open_ltable(thd,&di->table_list,TL_WRITE_DELAYED)))
{
thd->fatal_error(); // Abort waiting inserts
goto end;
}
if (!(di->table->file->table_flags() & HA_CAN_INSERT_DELAYED))
{
thd->fatal_error();
my_error(ER_ILLEGAL_HA, MYF(0), di->table_list.real_name);
goto end;
}
di->table->copy_blobs=1;
/* One can now use this */
pthread_mutex_lock(&LOCK_delayed_insert);
delayed_threads.append(di);
pthread_mutex_unlock(&LOCK_delayed_insert);
/* Tell client that the thread is initialized */
pthread_cond_signal(&di->cond_client);
/* Now wait until we get an insert or lock to handle */
/* We will not abort as long as a client thread uses this thread */
for (;;)
{
if (thd->killed)
{
uint lock_count;
/*
Remove this from delay insert list so that no one can request a
table from this
*/
pthread_mutex_unlock(&di->mutex);
pthread_mutex_lock(&LOCK_delayed_insert);
di->unlink();
lock_count=di->lock_count();
pthread_mutex_unlock(&LOCK_delayed_insert);
pthread_mutex_lock(&di->mutex);
if (!lock_count && !di->tables_in_use && !di->stacked_inserts)
break; // Time to die
}
if (!di->status && !di->stacked_inserts)
{
struct timespec abstime;
set_timespec(abstime, delayed_insert_timeout);
/* Information for pthread_kill */
di->thd.mysys_var->current_mutex= &di->mutex;
di->thd.mysys_var->current_cond= &di->cond;
di->thd.proc_info="Waiting for INSERT";
DBUG_PRINT("info",("Waiting for someone to insert rows"));
while (!thd->killed)
{
int error;
#if defined(HAVE_BROKEN_COND_TIMEDWAIT)
error=pthread_cond_wait(&di->cond,&di->mutex);
#else
error=pthread_cond_timedwait(&di->cond,&di->mutex,&abstime);
#ifdef EXTRA_DEBUG
if (error && error != EINTR && error != ETIMEDOUT)
{
fprintf(stderr, "Got error %d from pthread_cond_timedwait\n",error);
DBUG_PRINT("error",("Got error %d from pthread_cond_timedwait",
error));
}
#endif
#endif
if (thd->killed || di->status)
break;
if (error == ETIME || error == ETIMEDOUT)
{
thd->killed=1;
break;
}
}
/* We can't lock di->mutex and mysys_var->mutex at the same time */
pthread_mutex_unlock(&di->mutex);
pthread_mutex_lock(&di->thd.mysys_var->mutex);
di->thd.mysys_var->current_mutex= 0;
di->thd.mysys_var->current_cond= 0;
pthread_mutex_unlock(&di->thd.mysys_var->mutex);
pthread_mutex_lock(&di->mutex);
}
di->thd.proc_info=0;
if (di->tables_in_use && ! thd->lock)
{
/* request for new delayed insert */
if (!(thd->lock=mysql_lock_tables(thd,&di->table,1)))
{
di->dead= 1; // Some fatal error
thd->killed= 1;
}
pthread_cond_broadcast(&di->cond_client);
}
if (di->stacked_inserts)
{
if (di->handle_inserts())
{
di->dead= 1; // Some fatal error
thd->killed= 1;
}
}
di->status=0;
if (!di->stacked_inserts && !di->tables_in_use && thd->lock)
{
/*
No one is doing a insert delayed
Unlock table so that other threads can use it
*/
MYSQL_LOCK *lock=thd->lock;
thd->lock=0;
pthread_mutex_unlock(&di->mutex);
mysql_unlock_tables(thd, lock);
di->group_count=0;
pthread_mutex_lock(&di->mutex);
}
if (di->tables_in_use)
pthread_cond_broadcast(&di->cond_client); // If waiting clients
}
end:
/*
di should be unlinked from the thread handler list and have no active
clients
*/
close_thread_tables(thd); // Free the table
di->table=0;
di->dead= 1; // If error
thd->killed= 1;
pthread_cond_broadcast(&di->cond_client); // Safety
pthread_mutex_unlock(&di->mutex);
pthread_mutex_lock(&LOCK_delayed_create); // Because of delayed_get_table
pthread_mutex_lock(&LOCK_delayed_insert);
delete di;
pthread_mutex_unlock(&LOCK_delayed_insert);
pthread_mutex_unlock(&LOCK_delayed_create);
my_thread_end();
pthread_exit(0);
DBUG_RETURN(0);
}
/* Remove pointers from temporary fields to allocated values */
static void unlink_blobs(register TABLE *table)
{
for (Field **ptr=table->field ; *ptr ; ptr++)
{
if ((*ptr)->flags & BLOB_FLAG)
((Field_blob *) (*ptr))->clear_temporary();
}
}
/* Free blobs stored in current row */
static void free_delayed_insert_blobs(register TABLE *table)
{
for (Field **ptr=table->field ; *ptr ; ptr++)
{
if ((*ptr)->flags & BLOB_FLAG)
{
char *str;
((Field_blob *) (*ptr))->get_ptr(&str);
my_free(str,MYF(MY_ALLOW_ZERO_PTR));
((Field_blob *) (*ptr))->reset();
}
}
}
bool delayed_insert::handle_inserts(void)
{
int error;
uint max_rows;
bool using_ignore=0, using_bin_log=mysql_bin_log.is_open();
delayed_row *row;
DBUG_ENTER("handle_inserts");
/* Allow client to insert new rows */
pthread_mutex_unlock(&mutex);
table->next_number_field=table->found_next_number_field;
thd.proc_info="upgrading lock";
if (thr_upgrade_write_delay_lock(*thd.lock->locks))
{
/* This can only happen if thread is killed by shutdown */
sql_print_error(ER(ER_DELAYED_CANT_CHANGE_LOCK),table->real_name);
goto err;
}
thd.proc_info="insert";
max_rows=delayed_insert_limit;
if (thd.killed || table->version != refresh_version)
{
thd.killed=1;
max_rows= ~0; // Do as much as possible
}
/*
We can't use row caching when using the binary log because if
we get a crash, then binary log will contain rows that are not yet
written to disk, which will cause problems in replication.
*/
if (!using_bin_log)
table->file->extra(HA_EXTRA_WRITE_CACHE);
pthread_mutex_lock(&mutex);
while ((row=rows.get()))
{
stacked_inserts--;
pthread_mutex_unlock(&mutex);
memcpy(table->record[0],row->record,table->reclength);
thd.start_time=row->start_time;
thd.query_start_used=row->query_start_used;
thd.last_insert_id=row->last_insert_id;
thd.last_insert_id_used=row->last_insert_id_used;
thd.insert_id_used=row->insert_id_used;
table->timestamp_field_type= row->timestamp_field_type;
info.handle_duplicates= row->dup;
if (info.handle_duplicates == DUP_IGNORE ||
info.handle_duplicates == DUP_REPLACE)
{
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
using_ignore=1;
}
thd.clear_error(); // reset error for binlog
if (write_record(table,&info))
{
info.error_count++; // Ignore errors
thread_safe_increment(delayed_insert_errors,&LOCK_delayed_status);
row->log_query = 0;
}
if (using_ignore)
{
using_ignore=0;
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
}
if (row->query)
{
if (row->log_query & DELAYED_LOG_UPDATE)
mysql_update_log.write(&thd,row->query, row->query_length);
if (row->log_query & DELAYED_LOG_BIN && using_bin_log)
{
Query_log_event qinfo(&thd, row->query, row->query_length,0);
mysql_bin_log.write(&qinfo);
}
}
if (table->blob_fields)
free_delayed_insert_blobs(table);
thread_safe_sub(delayed_rows_in_use,1,&LOCK_delayed_status);
thread_safe_increment(delayed_insert_writes,&LOCK_delayed_status);
pthread_mutex_lock(&mutex);
delete row;
/*
Let READ clients do something once in a while
We should however not break in the middle of a multi-line insert
if we have binary logging enabled as we don't want other commands
on this table until all entries has been processed
*/
if (group_count++ >= max_rows && (row= rows.head()) &&
(!(row->log_query & DELAYED_LOG_BIN && using_bin_log) ||
row->query))
{
group_count=0;
if (stacked_inserts || tables_in_use) // Let these wait a while
{
if (tables_in_use)
pthread_cond_broadcast(&cond_client); // If waiting clients
thd.proc_info="reschedule";
pthread_mutex_unlock(&mutex);
if ((error=table->file->extra(HA_EXTRA_NO_CACHE)))
{
/* This should never happen */
table->file->print_error(error,MYF(0));
sql_print_error("%s",thd.net.last_error);
goto err;
}
query_cache_invalidate3(&thd, table, 1);
if (thr_reschedule_write_lock(*thd.lock->locks))
{
/* This should never happen */
sql_print_error(ER(ER_DELAYED_CANT_CHANGE_LOCK),table->real_name);
}
if (!using_bin_log)
table->file->extra(HA_EXTRA_WRITE_CACHE);
pthread_mutex_lock(&mutex);
thd.proc_info="insert";
}
if (tables_in_use)
pthread_cond_broadcast(&cond_client); // If waiting clients
}
}
thd.proc_info=0;
table->next_number_field=0;
pthread_mutex_unlock(&mutex);
if ((error=table->file->extra(HA_EXTRA_NO_CACHE)))
{ // This shouldn't happen
table->file->print_error(error,MYF(0));
sql_print_error("%s",thd.net.last_error);
goto err;
}
query_cache_invalidate3(&thd, table, 1);
pthread_mutex_lock(&mutex);
DBUG_RETURN(0);
err:
/* Remove all not used rows */
while ((row=rows.get()))
{
delete row;
thread_safe_increment(delayed_insert_errors,&LOCK_delayed_status);
stacked_inserts--;
}
thread_safe_increment(delayed_insert_errors, &LOCK_delayed_status);
pthread_mutex_lock(&mutex);
DBUG_RETURN(1);
}
#endif /* EMBEDDED_LIBRARY */
/***************************************************************************
Store records in INSERT ... SELECT *
***************************************************************************/
int
select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
DBUG_ENTER("select_insert::prepare");
unit= u;
if (check_insert_fields(thd,table,*fields,values,1))
DBUG_RETURN(1);
restore_record(table,default_values); // Get empty record
table->next_number_field=table->found_next_number_field;
thd->count_cuted_fields= CHECK_FIELD_WARN; // calc cuted fields
thd->cuted_fields=0;
if (info.handle_duplicates == DUP_IGNORE ||
info.handle_duplicates == DUP_REPLACE)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
table->file->start_bulk_insert((ha_rows) 0);
DBUG_RETURN(0);
}
void select_insert::cleanup()
{
/* select_insert/select_create are never re-used in prepared statement */
DBUG_ASSERT(0);
}
select_insert::~select_insert()
{
if (table)
{
table->next_number_field=0;
table->file->reset();
}
thd->count_cuted_fields= CHECK_FIELD_IGNORE;
}
bool select_insert::send_data(List<Item> &values)
{
DBUG_ENTER("select_insert::send_data");
if (unit->offset_limit_cnt)
{ // using limit offset,count
unit->offset_limit_cnt--;
DBUG_RETURN(0);
}
if (fields->elements)
fill_record(*fields, values, 1);
else
fill_record(table->field, values, 1);
if (thd->net.report_error || write_record(table,&info))
DBUG_RETURN(1);
if (table->next_number_field) // Clear for next record
{
table->next_number_field->reset();
if (! last_insert_id && thd->insert_id_used)
last_insert_id=thd->insert_id();
}
DBUG_RETURN(0);
}
void select_insert::send_error(uint errcode,const char *err)
{
DBUG_ENTER("select_insert::send_error");
/* TODO error should be sent at the query processing end */
::send_error(thd,errcode,err);
if (!table)
{
/*
This can only happen when using CREATE ... SELECT and the table was not
created becasue of an syntax error
*/
DBUG_VOID_RETURN;
}
table->file->end_bulk_insert();
/*
If at least one row has been inserted/modified and will stay in the table
(the table doesn't have transactions) (example: we got a duplicate key
error while inserting into a MyISAM table) we must write to the binlog (and
the error code will make the slave stop).
*/
if ((info.copied || info.deleted || info.updated) &&
!table->file->has_transactions())
{
if (last_insert_id)
thd->insert_id(last_insert_id); // For binary log
mysql_update_log.write(thd,thd->query,thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length,
table->file->has_transactions());
mysql_bin_log.write(&qinfo);
}
if (!table->tmp_table)
thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
}
if (info.copied || info.deleted || info.updated)
query_cache_invalidate3(thd, table, 1);
ha_rollback_stmt(thd);
DBUG_VOID_RETURN;
}
bool select_insert::send_eof()
{
int error,error2;
DBUG_ENTER("select_insert::send_eof");
error=table->file->end_bulk_insert();
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
/*
We must invalidate the table in the query cache before binlog writing
and ha_autocommit_...
*/
if (info.copied || info.deleted || info.updated)
{
query_cache_invalidate3(thd, table, 1);
if (!(table->file->has_transactions() || table->tmp_table))
thd->options|=OPTION_STATUS_NO_TRANS_UPDATE;
}
if (last_insert_id)
thd->insert_id(last_insert_id); // For binary log
/* Write to binlog before commiting transaction */
mysql_update_log.write(thd,thd->query,thd->query_length);
if (mysql_bin_log.is_open())
{
if (!error)
thd->clear_error();
Query_log_event qinfo(thd, thd->query, thd->query_length,
table->file->has_transactions());
mysql_bin_log.write(&qinfo);
}
if ((error2=ha_autocommit_or_rollback(thd,error)) && ! error)
error=error2;
if (error)
{
table->file->print_error(error,MYF(0));
//TODO error should be sent at the query processing end
::send_error(thd);
DBUG_RETURN(1);
}
char buff[160];
if (info.handle_duplicates == DUP_IGNORE)
sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
(ulong) (info.records - info.copied), (ulong) thd->cuted_fields);
else
sprintf(buff, ER(ER_INSERT_INFO), (ulong) info.records,
(ulong) (info.deleted+info.updated), (ulong) thd->cuted_fields);
::send_ok(thd,info.copied+info.deleted+info.updated,last_insert_id,buff);
DBUG_RETURN(0);
}
/***************************************************************************
CREATE TABLE (SELECT) ...
***************************************************************************/
int
select_create::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
DBUG_ENTER("select_create::prepare");
unit= u;
table= create_table_from_items(thd, create_info, db, name,
extra_fields, keys, &values, &lock);
if (!table)
DBUG_RETURN(-1); // abort() deletes table
if (table->fields < values.elements)
{
my_printf_error(ER_WRONG_VALUE_COUNT_ON_ROW,
ER(ER_WRONG_VALUE_COUNT_ON_ROW),
MYF(0),1);
DBUG_RETURN(-1);
}
/* First field to copy */
field=table->field+table->fields - values.elements;
/* Don't set timestamp if used */
table->timestamp_field_type= TIMESTAMP_NO_AUTO_SET;
table->next_number_field=table->found_next_number_field;
restore_record(table,default_values); // Get empty record
thd->count_cuted_fields= CHECK_FIELD_WARN; // count warnings
thd->cuted_fields=0;
if (info.handle_duplicates == DUP_IGNORE ||
info.handle_duplicates == DUP_REPLACE)
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
table->file->start_bulk_insert((ha_rows) 0);
DBUG_RETURN(0);
}
bool select_create::send_data(List<Item> &values)
{
if (unit->offset_limit_cnt)
{ // using limit offset,count
unit->offset_limit_cnt--;
return 0;
}
fill_record(field, values, 1);
if (thd->net.report_error ||write_record(table,&info))
return 1;
if (table->next_number_field) // Clear for next record
{
table->next_number_field->reset();
if (! last_insert_id && thd->insert_id_used)
last_insert_id=thd->insert_id();
}
return 0;
}
bool select_create::send_eof()
{
bool tmp=select_insert::send_eof();
if (tmp)
abort();
else
{
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
VOID(pthread_mutex_lock(&LOCK_open));
mysql_unlock_tables(thd, lock);
/*
TODO:
Check if we can remove the following two rows.
We should be able to just keep the table in the table cache.
*/
if (!table->tmp_table)
hash_delete(&open_cache,(byte*) table);
lock=0;
table=0;
VOID(pthread_mutex_unlock(&LOCK_open));
}
return tmp;
}
void select_create::abort()
{
VOID(pthread_mutex_lock(&LOCK_open));
if (lock)
{
mysql_unlock_tables(thd, lock);
lock=0;
}
if (table)
{
table->file->extra(HA_EXTRA_NO_IGNORE_DUP_KEY);
enum db_type table_type=table->db_type;
if (!table->tmp_table)
{
hash_delete(&open_cache,(byte*) table);
if (!create_info->table_existed)
quick_rm_table(table_type, db, name);
}
else if (!create_info->table_existed)
close_temporary_table(thd, db, name);
table=0;
}
VOID(pthread_mutex_unlock(&LOCK_open));
}
/*****************************************************************************
Instansiate templates
*****************************************************************************/
#ifdef __GNUC__
template class List_iterator_fast<List_item>;
#ifndef EMBEDDED_LIBRARY
template class I_List<delayed_insert>;
template class I_List_iterator<delayed_insert>;
template class I_List<delayed_row>;
#endif /* EMBEDDED_LIBRARY */
#endif /* __GNUC__ */
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