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Commit ead6f225 authored by bell@sanja.is.com.ua's avatar bell@sanja.is.com.ua
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new SELECT_LEX structures used for storing global ORDER BY, global LIMIT & limit counters

parent 494184ff
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Showing with 208 additions and 181 deletions
mysql-test/r/union.result
View file @ ead6f225
......@@ -88,7 +88,6 @@ explain (select a,b from t1 limit 2) union all (select a,b from t2 order by a l
table type possible_keys key key_len ref rows Extra
t1 ALL NULL NULL NULL NULL 4
t2 ALL NULL NULL NULL NULL 4 Using filesort
t1 ALL NULL NULL NULL NULL 4
(select sql_calc_found_rows a,b from t1 limit 2) union all (select a,b from t2 order by a) limit 2;
a b
1 a
......
sql/item_sum.cc
View file @ ead6f225
......@@ -940,6 +940,7 @@ bool Item_sum_count_distinct::fix_fields(THD *thd,TABLE_LIST *tables)
bool Item_sum_count_distinct::setup(THD *thd)
{
List<Item> list;
SELECT_LEX *select_lex= current_lex->select;
/* Create a table with an unique key over all parameters */
for (uint i=0; i < arg_count ; i++)
{
......@@ -961,9 +962,10 @@ bool Item_sum_count_distinct::setup(THD *thd)
free_tmp_table(thd, table);
tmp_table_param->cleanup();
}
if (!(table=create_tmp_table(thd, tmp_table_param, list, (ORDER*) 0, 1,
0, 0,
current_lex->select->options | thd->options)))
if (!(table= create_tmp_table(thd, tmp_table_param, list, (ORDER*) 0, 1,
0, 0,
select_lex->options | thd->options,
(SELECT_LEX_UNIT*) select_lex->master)))
return 1;
table->file->extra(HA_EXTRA_NO_ROWS); // Don't update rows
table->no_rows=1;
......
sql/mysql_priv.h
View file @ ead6f225
......@@ -359,7 +359,8 @@ int setup_order(THD *thd,TABLE_LIST *tables, List<Item> &fields,
int handle_select(THD *thd, LEX *lex, select_result *result);
int mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &list,COND *conds,
ORDER *order, ORDER *group,Item *having,ORDER *proc_param,
ulong select_type,select_result *result);
ulong select_type,select_result *result,
SELECT_LEX_UNIT *unit);
int mysql_union(THD *thd, LEX *lex,select_result *result);
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t);
Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
......
sql/sql_class.cc
View file @ ead6f225
......@@ -389,9 +389,9 @@ bool select_send::send_data(List<Item> &items)
String *packet= &thd->packet;
DBUG_ENTER("send_data");
if (thd->offset_limit)
if (unit->offset_limit_cnt)
{ // using limit offset,count
thd->offset_limit--;
unit->offset_limit_cnt--;
DBUG_RETURN(0);
}
packet->length(0); // Reset packet
......@@ -439,11 +439,12 @@ select_export::~select_export()
}
int
select_export::prepare(List<Item> &list)
select_export::prepare(List<Item> &list, SELECT_LEX_UNIT *u)
{
char path[FN_REFLEN];
uint option=4;
bool blob_flag=0;
unit= u;
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
option|=1; // Force use of db directory
#endif
......@@ -510,9 +511,9 @@ bool select_export::send_data(List<Item> &items)
String tmp(buff,sizeof(buff)),*res;
tmp.length(0);
if (thd->offset_limit)
if (unit->offset_limit_cnt)
{ // using limit offset,count
thd->offset_limit--;
unit->offset_limit_cnt--;
DBUG_RETURN(0);
}
row_count++;
......@@ -678,9 +679,11 @@ select_dump::~select_dump()
}
int
select_dump::prepare(List<Item> &list __attribute__((unused)))
select_dump::prepare(List<Item> &list __attribute__((unused)),
SELECT_LEX_UNIT *u)
{
uint option=4;
unit= u;
#ifdef DONT_ALLOW_FULL_LOAD_DATA_PATHS
option|=1; // Force use of db directory
#endif
......@@ -719,9 +722,9 @@ bool select_dump::send_data(List<Item> &items)
Item *item;
DBUG_ENTER("send_data");
if (thd->offset_limit)
if (unit->offset_limit_cnt)
{ // using limit offset,count
thd->offset_limit--;
unit->offset_limit_cnt--;
DBUG_RETURN(0);
}
if (row_count++ > 1)
......
sql/sql_class.h
View file @ ead6f225
......@@ -382,7 +382,7 @@ class THD :public ilink {
#endif
ulonglong next_insert_id,last_insert_id,current_insert_id,
limit_found_rows;
ha_rows select_limit,offset_limit,default_select_limit,cuted_fields,
ha_rows default_select_limit,cuted_fields,
max_join_size, sent_row_count, examined_row_count;
table_map used_tables;
UC *user_connect;
......@@ -551,10 +551,15 @@ void send_error(NET *net,uint sql_errno=0, const char *err=0);
class select_result :public Sql_alloc {
protected:
THD *thd;
SELECT_LEX_UNIT *unit;
public:
select_result();
virtual ~select_result() {};
virtual int prepare(List<Item> &list) { return 0; }
virtual int prepare(List<Item> &list, SELECT_LEX_UNIT *u)
{
unit= u;
return 0;
}
virtual bool send_fields(List<Item> &list,uint flag)=0;
virtual bool send_data(List<Item> &items)=0;
virtual void initialize_tables (JOIN *join=0) {}
......@@ -587,7 +592,7 @@ class select_export :public select_result {
public:
select_export(sql_exchange *ex) :exchange(ex),file(-1),row_count(0L) {}
~select_export();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
......@@ -606,7 +611,7 @@ class select_dump :public select_result {
select_dump(sql_exchange *ex) :exchange(ex),file(-1),row_count(0L)
{ path[0]=0; }
~select_dump();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
......@@ -629,7 +634,7 @@ class select_insert :public select_result {
info.handle_duplicates=duplic;
}
~select_insert();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list, uint flag)
{ return 0; }
bool send_data(List<Item> &items);
......@@ -658,7 +663,7 @@ class select_create: public select_insert {
create_info(create_info_par),
lock(0)
{}
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_data(List<Item> &values);
bool send_eof();
void abort();
......@@ -672,7 +677,7 @@ class select_union :public select_result {
select_union(TABLE *table_par);
~select_union();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list, uint flag)
{ return 0; }
bool send_data(List<Item> &items);
......@@ -787,7 +792,7 @@ class Unique :public Sql_alloc
multi_delete(THD *thd, TABLE_LIST *dt, thr_lock_type lock_option_arg,
uint num_of_tables);
~multi_delete();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
......@@ -816,7 +821,7 @@ class Unique :public Sql_alloc
enum enum_duplicates handle_duplicates,
thr_lock_type lock_option_arg, uint num);
~multi_update();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
......
sql/sql_delete.cc
View file @ ead6f225
......@@ -232,9 +232,10 @@ multi_delete::multi_delete(THD *thd_arg, TABLE_LIST *dt,
int
multi_delete::prepare(List<Item> &values)
multi_delete::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
DBUG_ENTER("multi_delete::prepare");
unit= u;
do_delete = true;
thd->proc_info="deleting from main table";
......
sql/sql_derived.cc
View file @ ead6f225
......@@ -28,13 +28,13 @@
static const char *any_db="*any*"; // Special symbol for check_access
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t)
int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit, TABLE_LIST *t)
{
/*
TODO: make derived tables with union inside (now only 1 SELECT may be
procesed)
*/
SELECT_LEX *sl= (SELECT_LEX*)s->slave;
SELECT_LEX *sl= (SELECT_LEX*)unit->slave;
List<Item> item_list;
TABLE *table;
int res;
......@@ -75,9 +75,11 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t)
}
bzero((char*) &tmp_table_param,sizeof(tmp_table_param));
tmp_table_param.field_count=item_list.elements;
if (!(table=create_tmp_table(thd, &tmp_table_param, sl->item_list,
(ORDER*) 0, 0, 1, 0,
(sl->options | thd->options | TMP_TABLE_ALL_COLUMNS))))
if (!(table= create_tmp_table(thd, &tmp_table_param, sl->item_list,
(ORDER*) 0, 0, 1, 0,
(sl->options | thd->options |
TMP_TABLE_ALL_COLUMNS),
unit)))
{
res=-1;
goto exit;
......@@ -85,11 +87,11 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t)
if ((derived_result=new select_union(table)))
{
thd->offset_limit=sl->offset_limit;
thd->select_limit=sl->select_limit+sl->offset_limit;
if (thd->select_limit < sl->select_limit)
thd->select_limit= HA_POS_ERROR;
if (thd->select_limit == HA_POS_ERROR)
unit->offset_limit_cnt= sl->offset_limit;
unit->select_limit_cnt= sl->select_limit+sl->offset_limit;
if (unit->select_limit_cnt < sl->select_limit)
unit->select_limit_cnt= HA_POS_ERROR;
if (unit->select_limit_cnt == HA_POS_ERROR)
sl->options&= ~OPTION_FOUND_ROWS;
res=mysql_select(thd, tables, sl->item_list,
......@@ -97,7 +99,7 @@ int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *s, TABLE_LIST *t)
(ORDER*) sl->group_list.first,
sl->having, (ORDER*) NULL,
sl->options | thd->options | SELECT_NO_UNLOCK,
derived_result);
derived_result, unit);
if (!res)
{
// Here we entirely fix both TABLE_LIST and list of SELECT's as there were no derived tables
......
sql/sql_insert.cc
View file @ ead6f225
......@@ -1266,10 +1266,11 @@ bool delayed_insert::handle_inserts(void)
***************************************************************************/
int
select_insert::prepare(List<Item> &values)
select_insert::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
DBUG_ENTER("select_insert::prepare");
unit= u;
save_time_stamp=table->time_stamp;
if (check_insert_fields(thd,table,*fields,values,1))
DBUG_RETURN(1);
......@@ -1302,9 +1303,9 @@ select_insert::~select_insert()
bool select_insert::send_data(List<Item> &values)
{
if (thd->offset_limit)
if (unit->offset_limit_cnt)
{ // using limit offset,count
thd->offset_limit--;
unit->offset_limit_cnt--;
return 0;
}
if (fields->elements)
......@@ -1380,10 +1381,11 @@ bool select_insert::send_eof()
***************************************************************************/
int
select_create::prepare(List<Item> &values)
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)
......@@ -1413,9 +1415,9 @@ select_create::prepare(List<Item> &values)
bool select_create::send_data(List<Item> &values)
{
if (thd->offset_limit)
if (unit->offset_limit_cnt)
{ // using limit offset,count
thd->offset_limit--;
unit->offset_limit_cnt--;
return 0;
}
fill_record(field,values);
......
sql/sql_lex.cc
View file @ ead6f225
......@@ -895,14 +895,16 @@ void st_select_lex_node::init_select()
order_list.elements= 0;
order_list.first= 0;
order_list.next= (byte**) &order_list.first;
select_limit= offset_limit= 0;
select_limit= HA_POS_ERROR;
offset_limit= 0;
}
void st_select_lex_unit::init_query()
{
st_select_lex_node::init_query();
global_parameters= this;
select_limit_cnt= offset_limit_cnt= 0;
select_limit_cnt= HA_POS_ERROR;
offset_limit_cnt= 0;
}
void st_select_lex::init_query()
......
sql/sql_parse.cc
View file @ ead6f225
......@@ -1203,11 +1203,12 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
void
mysql_execute_command(void)
{
int res=0;
THD *thd=current_thd;
int res= 0;
THD *thd= current_thd;
LEX *lex= &thd->lex;
TABLE_LIST *tables=(TABLE_LIST*) lex->select_lex.table_list.first;
SELECT_LEX *select_lex = lex->select;
TABLE_LIST *tables= (TABLE_LIST*) lex->select_lex.table_list.first;
SELECT_LEX *select_lex= lex->select;
SELECT_LEX_UNIT *unit= &lex->unit;
DBUG_ENTER("mysql_execute_command");
if (thd->slave_thread)
......@@ -1274,11 +1275,11 @@ mysql_execute_command(void)
break; // Error message is given
}
thd->offset_limit=select_lex->offset_limit;
thd->select_limit=select_lex->select_limit+select_lex->offset_limit;
if (thd->select_limit < select_lex->select_limit)
thd->select_limit= HA_POS_ERROR; // no limit
if (thd->select_limit == HA_POS_ERROR)
unit->offset_limit_cnt =select_lex->offset_limit;
unit->select_limit_cnt =select_lex->select_limit+select_lex->offset_limit;
if (unit->select_limit_cnt < select_lex->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // no limit
if (unit->select_limit_cnt == HA_POS_ERROR)
select_lex->options&= ~OPTION_FOUND_ROWS;
if (lex->exchange)
......@@ -1503,10 +1504,11 @@ mysql_execute_command(void)
for (table = tables->next ; table ; table=table->next)
table->lock_type= lex->lock_option;
}
thd->offset_limit=select_lex->offset_limit;
thd->select_limit=select_lex->select_limit+select_lex->offset_limit;
if (thd->select_limit < select_lex->select_limit)
thd->select_limit= HA_POS_ERROR; // No limit
unit->offset_limit_cnt= select_lex->offset_limit;
unit->select_limit_cnt= select_lex->select_limit+
select_lex->offset_limit;
if (unit->select_limit_cnt < select_lex->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // No limit
/* Skip first table, which is the table we are creating */
lex->select_lex.table_list.first=
......@@ -1788,13 +1790,13 @@ mysql_execute_command(void)
while ((item=value_list++))
total_list.push_back(item);
res=mysql_select(thd,tables,total_list,
select_lex->where,
(ORDER *)NULL,(ORDER *)NULL,(Item *)NULL,
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result);
res= mysql_select(thd, tables, total_list,
select_lex->where,
(ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result, unit);
delete result;
}
else
......@@ -1844,10 +1846,10 @@ mysql_execute_command(void)
}
select_result *result;
thd->offset_limit=select_lex->offset_limit;
thd->select_limit=select_lex->select_limit+select_lex->offset_limit;
if (thd->select_limit < select_lex->select_limit)
thd->select_limit= HA_POS_ERROR; // No limit
unit->offset_limit_cnt= select_lex->offset_limit;
unit->select_limit_cnt= select_lex->select_limit+select_lex->offset_limit;
if (unit->select_limit_cnt < select_lex->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // No limit
if (check_dup(tables->db, tables->real_name, tables->next))
{
......@@ -1963,7 +1965,7 @@ mysql_execute_command(void)
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result);
result, unit);
delete result;
}
else
......@@ -2667,8 +2669,10 @@ mysql_init_query(THD *thd)
{
DBUG_ENTER("mysql_init_query");
thd->lex.unit.init_query();
thd->lex.unit.init_select();
thd->lex.select_lex.init_query();
thd->lex.unit.slave= &thd->lex.select_lex;
thd->lex.unit.select_limit= thd->default_select_limit; //Global limit
thd->lex.select_lex.master= &thd->lex.unit;
thd->lex.select_lex.prev= &thd->lex.unit.slave;
thd->lex.value_list.empty();
......@@ -2716,6 +2720,7 @@ mysql_new_select(LEX *lex, bool move_down)
else
select_lex->include_neighbour(lex->select);
((SELECT_LEX_UNIT*)select_lex->master)->global_parameters= select_lex;
select_lex->include_global(&lex->select->link_next);
lex->select= select_lex;
return 0;
......
sql/sql_select.cc
View file @ ead6f225
This diff is collapsed.
sql/sql_select.h
View file @ ead6f225
......@@ -173,6 +173,8 @@ class JOIN {
select_result *result;
TMP_TABLE_PARAM tmp_table_param;
MYSQL_LOCK *lock;
// unit structure (with global parameters) for this select
SELECT_LEX_UNIT *unit;
};
......@@ -187,7 +189,8 @@ void TEST_join(JOIN *join);
bool store_val_in_field(Field *field,Item *val);
TABLE *create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields,
ORDER *group, bool distinct, bool save_sum_fields,
bool allow_distinct_limit, ulong select_options);
bool allow_distinct_limit, ulong select_options,
SELECT_LEX_UNIT *unit);
void free_tmp_table(THD *thd, TABLE *entry);
void count_field_types(TMP_TABLE_PARAM *param, List<Item> &fields,
bool reset_with_sum_func);
......
sql/sql_union.cc
View file @ ead6f225
......@@ -27,8 +27,8 @@
int mysql_union(THD *thd, LEX *lex,select_result *result)
{
SELECT_LEX *sl, *last_sl, *lex_sl;
ORDER *order;
SELECT_LEX *sl;
SELECT_LEX_UNIT *unit= &(lex->unit);
List<Item> item_list;
TABLE *table;
int describe=(lex->select_lex.options & SELECT_DESCRIBE) ? 1 : 0;
......@@ -39,12 +39,12 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
TMP_TABLE_PARAM tmp_table_param;
select_union *union_result;
DBUG_ENTER("mysql_union");
st_select_lex_node * global;
/* Fix tables 'to-be-unioned-from' list to point at opened tables */
last_sl= &lex->select_lex;
for (sl= last_sl;
sl && sl->linkage != GLOBAL_OPTIONS_TYPE;
last_sl= sl, sl= (SELECT_LEX *) sl->next)
for (sl= &lex->select_lex;
sl;
sl= (SELECT_LEX *) sl->next)
{
for (TABLE_LIST *cursor= (TABLE_LIST *)sl->table_list.first;
cursor;
......@@ -52,31 +52,13 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
cursor->table= ((TABLE_LIST*) cursor->table)->table;
}
/* last_sel now points at the last select where the ORDER BY is stored */
if (sl)
/* Global option */
if (((void*)(global= unit->global_parameters)) == ((void*)unit))
{
/*
The found SL is an extra SELECT_LEX argument that contains
the ORDER BY and LIMIT parameter for the whole UNION
*/
lex_sl= sl;
order= (ORDER *) lex_sl->order_list.first;
found_rows_for_union = lex->select_lex.options & OPTION_FOUND_ROWS && !describe && sl->select_limit;
found_rows_for_union = lex->select_lex.options & OPTION_FOUND_ROWS &&
!describe && global->select_limit;
if (found_rows_for_union)
lex->select_lex.options ^= OPTION_FOUND_ROWS;
// This is done to eliminate unnecessary slowing down of the first query
if (!order || !describe)
last_sl->next=0; // Remove this extra element
}
else if (!last_sl->braces)
{
lex_sl= last_sl; // ORDER BY is here
order= (ORDER *) lex_sl->order_list.first;
}
else
{
lex_sl=0;
order=0;
}
if (describe)
......@@ -113,11 +95,12 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
bzero((char*) &tmp_table_param,sizeof(tmp_table_param));
tmp_table_param.field_count=item_list.elements;
if (!(table=create_tmp_table(thd, &tmp_table_param, item_list,
(ORDER*) 0, !describe & !lex->union_option,
1, 0,
(lex->select_lex.options | thd->options |
TMP_TABLE_ALL_COLUMNS))))
if (!(table= create_tmp_table(thd, &tmp_table_param, item_list,
(ORDER*) 0, !describe & !lex->union_option,
1, 0,
(lex->select_lex.options | thd->options |
TMP_TABLE_ALL_COLUMNS),
unit)))
DBUG_RETURN(-1);
table->file->extra(HA_EXTRA_WRITE_CACHE);
table->file->extra(HA_EXTRA_IGNORE_DUP_KEY);
......@@ -136,11 +119,11 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
for (sl= &lex->select_lex; sl; sl= (SELECT_LEX*) sl->next)
{
lex->select=sl;
thd->offset_limit=sl->offset_limit;
thd->select_limit=sl->select_limit+sl->offset_limit;
if (thd->select_limit < sl->select_limit)
thd->select_limit= HA_POS_ERROR; // no limit
if (thd->select_limit == HA_POS_ERROR)
unit->offset_limit_cnt= sl->offset_limit;
unit->select_limit_cnt= sl->select_limit+sl->offset_limit;
if (unit->select_limit_cnt < sl->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // no limit
if (unit->select_limit_cnt == HA_POS_ERROR)
sl->options&= ~OPTION_FOUND_ROWS;
res= mysql_select(thd,
......@@ -155,7 +138,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
(ORDER*) NULL,
sl->options | thd->options |
SELECT_NO_UNLOCK | ((describe) ? SELECT_DESCRIBE : 0),
union_result);
union_result, unit);
if (res)
goto exit;
}
......@@ -187,26 +170,20 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
}
if (!thd->fatal_error) // Check if EOM
{
if (lex_sl)
{
thd->offset_limit=lex_sl->offset_limit;
thd->select_limit=lex_sl->select_limit+lex_sl->offset_limit;
if (thd->select_limit < lex_sl->select_limit)
thd->select_limit= HA_POS_ERROR; // no limit
if (thd->select_limit == HA_POS_ERROR)
thd->options&= ~OPTION_FOUND_ROWS;
}
else
{
thd->offset_limit= 0;
thd->select_limit= thd->default_select_limit;
}
st_select_lex_node * global= unit->global_parameters;
unit->offset_limit_cnt= global->offset_limit;
unit->select_limit_cnt= global->select_limit+global->offset_limit;
if (unit->select_limit_cnt < global->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // no limit
if (unit->select_limit_cnt == HA_POS_ERROR)
thd->options&= ~OPTION_FOUND_ROWS;
if (describe)
thd->select_limit= HA_POS_ERROR; // no limit
res=mysql_select(thd,&result_table_list,
item_list, NULL, (describe) ? 0 : order,
(ORDER*) NULL, NULL, (ORDER*) NULL,
thd->options, result);
unit->select_limit_cnt= HA_POS_ERROR; // no limit
res= mysql_select(thd,&result_table_list,
item_list, NULL,
(describe) ? 0 : (ORDER*)global->order_list.first,
(ORDER*) NULL, NULL, (ORDER*) NULL,
thd->options, result, unit);
if (found_rows_for_union && !res)
thd->limit_found_rows = (ulonglong)table->file->records;
}
......@@ -230,7 +207,7 @@ select_union::select_union(TABLE *table_par)
We can always use DUP_IGNORE because the temporary table will only
contain a unique key if we are using not using UNION ALL
*/
info.handle_duplicates=DUP_IGNORE;
info.handle_duplicates= DUP_IGNORE;
}
select_union::~select_union()
......@@ -238,8 +215,9 @@ select_union::~select_union()
}
int select_union::prepare(List<Item> &list)
int select_union::prepare(List<Item> &list, SELECT_LEX_UNIT *u)
{
unit= u;
if (save_time_stamp && list.elements != table->fields)
{
my_message(ER_WRONG_NUMBER_OF_COLUMNS_IN_SELECT,
......@@ -251,9 +229,9 @@ int select_union::prepare(List<Item> &list)
bool select_union::send_data(List<Item> &values)
{
if (thd->offset_limit)
if (unit->offset_limit_cnt)
{ // using limit offset,count
thd->offset_limit--;
unit->offset_limit_cnt--;
return 0;
}
fill_record(table->field,values);
......
sql/sql_update.cc
View file @ ead6f225
......@@ -379,9 +379,10 @@ multi_update::multi_update(THD *thd_arg, TABLE_LIST *ut, List<Item> &fs,
}
int
multi_update::prepare(List<Item> &values)
multi_update::prepare(List<Item> &values, SELECT_LEX_UNIT *u)
{
DBUG_ENTER("multi_update::prepare");
unit= u;
do_update = true;
thd->count_cuted_fields=1;
thd->cuted_fields=0L;
......@@ -466,15 +467,19 @@ multi_update::prepare(List<Item> &values)
}
if (counter)
{
Field_string offset(table_ref->table->file->ref_length,false,"offset",table_ref->table,true);
Field_string offset(table_ref->table->file->ref_length, false,
"offset", table_ref->table, true);
temp_fields->push_front(new Item_field(((Field *)&offset)));
// Here I make tmp tables
int cnt=counter-1;
TMP_TABLE_PARAM tmp_table_param;
bzero((char*) &tmp_table_param,sizeof(tmp_table_param));
tmp_table_param.field_count=temp_fields->elements;
if (!(tmp_tables[cnt]=create_tmp_table(thd, &tmp_table_param, *temp_fields,
(ORDER*) 0, 1, 0, 0, TMP_TABLE_ALL_COLUMNS)))
if (!(tmp_tables[cnt]=create_tmp_table(thd, &tmp_table_param,
*temp_fields,
(ORDER*) 0, 1, 0, 0,
TMP_TABLE_ALL_COLUMNS,
unit)))
{
error = 1; // A proper error message is due here
DBUG_RETURN(1);
......
sql/sql_yacc.yy
View file @ ead6f225
......@@ -1449,7 +1449,14 @@ select:
select_init:
SELECT_SYM select_part2 { Select->braces=false; } union
|
'(' SELECT_SYM select_part2 ')' { Select->braces=true;} union_opt
'(' SELECT_SYM select_part2 ')'
{
SELECT_LEX * sel=Select;
sel->braces=true;
/* select in braces, can't contain global parameters */
((SELECT_LEX_UNIT*)sel->master)->global_parameters=
sel->master;
} union_opt
select_part2:
......@@ -3826,10 +3833,15 @@ optional_order_or_limit:
|
{
LEX *lex=Lex;
if (!lex->select->braces || mysql_new_select(lex, 0))
if (!lex->select->braces)
YYABORT;
mysql_init_select(lex);
lex->select->linkage= GLOBAL_OPTIONS_TYPE;
((SELECT_LEX_UNIT*)lex->select->master)->global_parameters=
lex->select->master;
/*
Following type conversion looks like hack, but all that need SELECT_LEX
fields always check linkage type.
*/
lex->select= (SELECT_LEX*)lex->select->master;
lex->select->select_limit=lex->thd->default_select_limit;
}
opt_order_clause limit_clause
......
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