mariadb/sql/sql_derived.cc

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/* Copyright (C) 2002-2003 MySQL 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 */
/*
Derived tables
These were introduced by Sinisa <sinisa@mysql.com>
*/
#include "mysql_priv.h"
#include "sql_select.h"
#include "sql_acl.h"
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
/*
call given derived table processor (preparing or filling tables)
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
SYNOPSIS
mysql_handle_derived()
lex LEX for this thread
processor procedure of derived table processing
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
RETURN
0 ok
-1 Error
1 Error and error message given
*/
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
int
mysql_handle_derived(LEX *lex, int (*processor)(THD*, LEX*, TABLE_LIST*))
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
{
if (lex->derived_tables)
{
for (SELECT_LEX *sl= lex->all_selects_list;
sl;
sl= sl->next_select_in_list())
{
for (TABLE_LIST *cursor= sl->get_table_list();
cursor;
VIEW two TABLE_LIST copy eliminated include/mysqld_error.h: errors of view libmysqld/Makefile.am: new view file mysql-test/r/connect.result: SHOW TABLE show type of table mysql-test/r/ctype_recoding.result: SHOW TABLE show type of table mysql-test/r/drop.result: SHOW TABLE show type of table mysql-test/r/grant.result: new two privileges (CRETEA|SHOW VIEW) mysql-test/r/lowercase_table.result: SHOW TABLE show type of table mysql-test/r/ps_1general.result: SHOW TABLE show type of table mysql-test/r/rename.result: SHOW TABLE show type of table mysql-test/r/rpl000009.result: SHOW TABLE show type of table mysql-test/r/rpl_error_ignored_table.result: SHOW TABLE show type of table mysql-test/r/select.result: SHOW TABLE show type of table mysql-test/r/system_mysql_db.result: SHOW TABLE show type of table new two privileges (CRETEA|SHOW VIEW) mysql-test/t/system_mysql_db_fix.test: removing all system tables scripts/mysql_fix_privilege_tables.sql: new two privileges (CRETEA|SHOW VIEW) sql/Makefile.am: new VIEW related file sql/ha_myisammrg.cc: two TABLE_LIST copy eliminated sql/item.cc: VIEW sql/item.h: VIEW sql/item_subselect.cc: VIEW sql/item_subselect.h: VIEW sql/lex.h: VIEW sql/lock.cc: VIEW sql/mysql_priv.h: VIEW sql/mysqld.cc: VIEW new parameter - sql_updatable_view_key sql/opt_sum.cc: two TABLE_LIST copy eliminated sql/set_var.cc: new parameter - sql_updatable_view_key sql/share/czech/errmsg.txt: errors messages of views sql/share/danish/errmsg.txt: errors messages of views sql/share/dutch/errmsg.txt: errors messages of views sql/share/english/errmsg.txt: errors messages of views sql/share/estonian/errmsg.txt: errors messages of views sql/share/french/errmsg.txt: errors messages of views sql/share/german/errmsg.txt: errors messages of views sql/share/greek/errmsg.txt: errors messages of views sql/share/hungarian/errmsg.txt: errors messages of views sql/share/italian/errmsg.txt: errors messages of views sql/share/japanese/errmsg.txt: errors messages of views sql/share/korean/errmsg.txt: errors messages of views sql/share/norwegian-ny/errmsg.txt: errors messages of views sql/share/norwegian/errmsg.txt: errors messages of views sql/share/polish/errmsg.txt: errors messages of views sql/share/portuguese/errmsg.txt: errors messages of views sql/share/romanian/errmsg.txt: errors messages of views sql/share/russian/errmsg.txt: errors messages of views sql/share/serbian/errmsg.txt: errors messages of views sql/share/slovak/errmsg.txt: errors messages of views sql/share/spanish/errmsg.txt: errors messages of views sql/share/swedish/errmsg.txt: errors messages of views sql/share/ukrainian/errmsg.txt: errors messages of views sql/slave.cc: two TABLE_LIST copy eliminated sql/sp.cc: VIEW sql/sql_acl.cc: VIEW sql/sql_acl.h: VIEW sql/sql_base.cc: VIEW sql/sql_cache.cc: two TABLE_LIST copy eliminated sql/sql_class.h: VIEW sql/sql_db.cc: two TABLE_LIST copy eliminated sql/sql_delete.cc: VIEW sql/sql_derived.cc: VIEW sql/sql_handler.cc: two TABLE_LIST copy eliminated sql/sql_help.cc: two TABLE_LIST copy eliminated sql/sql_insert.cc: VIEW sql/sql_lex.cc: VIEW sql/sql_lex.h: VIEW sql/sql_load.cc: VIEW sql/sql_olap.cc: VIEW sql/sql_parse.cc: two TABLE_LIST copy eliminated VIEW sql/sql_prepare.cc: VIEW sql/sql_rename.cc: two TABLE_LIST copy eliminated sql/sql_select.cc: VIEW sql/sql_show.cc: VIEW sql/sql_table.cc: VIEW sql/sql_union.cc: VIEW sql/sql_update.cc: VIEW sql/sql_yacc.yy: VIEW sql/table.cc: VIEW sql/table.h: VIEW sql/tztime.cc: two TABLE_LIST copy eliminated sql/unireg.h: VIEW tests/client_test.c: VIEW
2004-07-16 01:15:55 +03:00
cursor= cursor->next_local)
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
{
int res;
if ((res= (*processor)(lex->thd, lex, cursor)))
return res;
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
}
if (lex->describe)
{
/*
Force join->join_tmp creation, because we will use this JOIN
twice for EXPLAIN and we have to have unchanged join for EXPLAINing
*/
sl->uncacheable|= UNCACHEABLE_EXPLAIN;
sl->master_unit()->uncacheable|= UNCACHEABLE_EXPLAIN;
}
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
}
}
return 0;
}
/*
Create temporary table structure (but do not fill it)
SYNOPSIS
mysql_derived_prepare()
thd Thread handle
lex LEX for this thread
orig_table_list TABLE_LIST for the upper SELECT
IMPLEMENTATION
Derived table is resolved with temporary table.
After table creation, the above TABLE_LIST is updated with a new table.
This function is called before any command containing derived table
is executed.
Derived tables is stored in thd->derived_tables and freed in
close_thread_tables()
RETURN
0 ok
1 Error
-1 Error and error message given
*/
int mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *orig_table_list)
{
SELECT_LEX_UNIT *unit= orig_table_list->derived;
int res= 0;
DBUG_ENTER("mysql_derived_prepare");
if (unit)
{
SELECT_LEX *first_select= unit->first_select();
TABLE *table= 0;
select_union *derived_result;
bool is_union= first_select->next_select() &&
first_select->next_select()->linkage == UNION_TYPE;
if (!(derived_result= new select_union(0)))
DBUG_RETURN(1); // out of memory
// st_select_lex_unit::prepare correctly work for single select
if ((res= unit->prepare(thd, derived_result, 0)))
goto exit;
derived_result->tmp_table_param.init();
derived_result->tmp_table_param.field_count= unit->types.elements;
/*
Temp table is created so that it hounours if UNION without ALL is to be
processed
*/
if (!(table= create_tmp_table(thd, &derived_result->tmp_table_param,
unit->types, (ORDER*) 0,
is_union && unit->union_distinct, 1,
(first_select->options | thd->options |
TMP_TABLE_ALL_COLUMNS),
HA_POS_ERROR,
orig_table_list->alias)))
{
res= -1;
goto exit;
}
derived_result->set_table(table);
exit:
/* Hide "Unknown column" or "Unknown function" error */
if (orig_table_list->view)
{
if (thd->net.last_errno == ER_BAD_FIELD_ERROR ||
thd->net.last_errno == ER_SP_DOES_NOT_EXIST)
{
thd->clear_error();
my_error(ER_VIEW_INVALID, MYF(0), orig_table_list->db,
orig_table_list->real_name);
}
}
/*
if it is preparation PS only or commands that need only VIEW structure
then we do not need real data and we can skip execution (and parameters
is not defined, too)
*/
if (res)
{
if (table)
free_tmp_table(thd, table);
delete derived_result;
}
else
{
if (!thd->fill_derived_tables())
delete derived_result;
orig_table_list->derived_result= derived_result;
orig_table_list->table= table;
orig_table_list->real_name= table->real_name;
table->derived_select_number= first_select->select_number;
table->tmp_table= TMP_TABLE;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
table->grant.privilege= SELECT_ACL;
#endif
orig_table_list->db= (char *)"";
// Force read of table stats in the optimizer
table->file->info(HA_STATUS_VARIABLE);
/* Add new temporary table to list of open derived tables */
table->next= thd->derived_tables;
thd->derived_tables= table;
}
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
}
else if (orig_table_list->ancestor)
orig_table_list->set_ancestor();
DBUG_RETURN(res);
}
/*
fill derived table
SYNOPSIS
mysql_derived_filling()
thd Thread handle
lex LEX for this thread
unit node that contains all SELECT's for derived tables
orig_table_list TABLE_LIST for the upper SELECT
IMPLEMENTATION
Derived table is resolved with temporary table. It is created based on the
queries defined. After temporary table is filled, if this is not EXPLAIN,
then the entire unit / node is deleted. unit is deleted if UNION is used
for derived table and node is deleted is it is a simple SELECT.
RETURN
0 ok
1 Error
-1 Error and error message given
*/
int mysql_derived_filling(THD *thd, LEX *lex, TABLE_LIST *orig_table_list)
{
TABLE *table= orig_table_list->table;
SELECT_LEX_UNIT *unit= orig_table_list->derived;
int res= 0;
/*check that table creation pass without problem and it is derived table */
if (table && unit)
now all tables of query are locked in one place (including derived tables) fixed BUG#2120 and other problem with EXPLAINing derived tables mysql-test/r/derived.result: correct tables names & Co in derived tables test case for BUG#2120 mysql-test/t/derived.test: test case for BUG#2120 sql/mysql_priv.h: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/repl_failsafe.cc: correct initialization of TABLE_LIST sql/sql_acl.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_base.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_delete.cc: all tables processing is done during opening sql/sql_derived.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) to sutisfy "all query tables locking" at the moment sql/sql_insert.cc: all tables processing is done during opening correct initialization of TABLE_LIST sql/sql_lex.cc: now table list will be created for whole query layout fix correct check of updated table in subqueries sql/sql_lex.h: now table list will be created for whole query correct check of updated table in subqueries sql/sql_olap.cc: THIS FUNCTION IS USED NOWHERE it will be good to remove it at all (handle_olaps) sql/sql_parse.cc: derived tables processing moved after open/locking all tables (in open_and_lock_tables) sql/sql_prepare.cc: new creating list parameters all tables processing is done during opening sql/sql_select.cc: all tables processing is done during opening sql/sql_select.h: now it used only within file where is defined sql/sql_udf.cc: used simple table opening without derived table processing to avoid unneeded initialization of SELECT_LEX sql/sql_update.cc: all tables processing is done during opening
2004-02-01 15:30:32 +02:00
{
SELECT_LEX *first_select= unit->first_select();
select_union *derived_result= orig_table_list->derived_result;
SELECT_LEX *save_current_select= lex->current_select;
bool is_union= first_select->next_select() &&
first_select->next_select()->linkage == UNION_TYPE;
if (is_union)
{
// execute union without clean up
res= unit->exec();
}
else
{
unit->offset_limit_cnt= first_select->offset_limit;
unit->select_limit_cnt= first_select->select_limit+
first_select->offset_limit;
if (unit->select_limit_cnt < first_select->select_limit)
unit->select_limit_cnt= HA_POS_ERROR;
if (unit->select_limit_cnt == HA_POS_ERROR)
first_select->options&= ~OPTION_FOUND_ROWS;
lex->current_select= first_select;
res= mysql_select(thd, &first_select->ref_pointer_array,
(TABLE_LIST*) first_select->table_list.first,
first_select->with_wild,
first_select->item_list, first_select->where,
(first_select->order_list.elements+
first_select->group_list.elements),
(ORDER *) first_select->order_list.first,
(ORDER *) first_select->group_list.first,
first_select->having, (ORDER*) NULL,
(first_select->options | thd->options |
SELECT_NO_UNLOCK),
derived_result, unit, first_select);
}
if (!res)
{
/*
Here we entirely fix both TABLE_LIST and list of SELECT's as
there were no derived tables
*/
if (derived_result->flush())
res= 1;
Fixed UNION fields type/length detecting mysql-test/r/union.result: new results with max union field length detecting type conversion tests mysql-test/t/union.test: type conversion tests sql/field.h: field converion support sql/item.cc: fixed printing field of internal temporary table of SELECT (reference from HAVING clause) layout fix new item for storing field type sql/item.h: new item for storing field type sql/item_subselect.cc: new subquery item length/dec detecting sql/mysql_priv.h: we do not need pre-inited tables and fields sql/sql_base.cc: we do not need double fix_fielding sql/sql_class.h: we do not need double fix_fielding sql/sql_derived.cc: preparing moved before temporary table creation sql/sql_lex.h: we do not need pre-inited tables and fields new lists to store fields types and fields of temporary table sql/sql_parse.cc: we do not need pre-inited tables and fields sql/sql_prepare.cc: we do not need pre-inited tables and fields sql/sql_select.cc: we do not need pre-inited tables and fields support mysql_select call from derived tables after it preparing (in derived table routing) support of crreating temporary table fields from Item_type_holder sql/sql_select.h: we do not need pre-inited tables and fields sql/sql_union.cc: we do not need pre-inited tables and fields check of columns number in union moved to prepare() prepering of SELECTS moved before temporary table creation, fixed union columns type/length detecting sql/sql_update.cc: we do not need pre-inited tables and fields
2003-11-23 02:01:15 +02:00
if (!lex->describe)
unit->cleanup();
}
else
{
free_tmp_table(thd, table);
unit->cleanup();
}
lex->current_select= save_current_select;
if (res)
free_tmp_table(thd, table);
}
return res;
}