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Merge MySQL 5.1.41 into MariaDB trunk, including a number of after-merge fixes.

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Also merge charset patch.
This commit is contained in:
unknown
2009-11-30 22:37:27 +01:00
parent 0df8279c46 4a45829044
commit db260b19e3
570 changed files with 21041 additions and 5483 deletions
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295
sql/sql_select.cc
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@ -159,6 +159,7 @@ static int join_read_const_table(JOIN_TAB *tab, POSITION *pos);
static int join_read_system(JOIN_TAB *tab);
static int join_read_const(JOIN_TAB *tab);
static int join_read_key(JOIN_TAB *tab);
static void join_read_key_unlock_row(st_join_table *tab);
static int join_read_always_key(JOIN_TAB *tab);
static int join_read_last_key(JOIN_TAB *tab);
static int join_no_more_records(READ_RECORD *info);
@ -643,6 +644,18 @@ JOIN::prepare(Item ***rref_pointer_array,
MYF(0)); /* purecov: inspected */
goto err; /* purecov: inspected */
}
if (thd->lex->derived_tables)
{
my_error(ER_WRONG_USAGE, MYF(0), "PROCEDURE",
thd->lex->derived_tables & DERIVED_VIEW ?
"view" : "subquery");
goto err;
}
if (thd->lex->sql_command != SQLCOM_SELECT)
{
my_error(ER_WRONG_USAGE, MYF(0), "PROCEDURE", "non-SELECT");
goto err;
}
}
if (!procedure && result && result->prepare(fields_list, unit_arg))
@ -654,8 +667,11 @@ JOIN::prepare(Item ***rref_pointer_array,
this->group= group_list != 0;
unit= unit_arg;
if (tmp_table_param.sum_func_count && !group_list)
implicit_grouping= TRUE;
#ifdef RESTRICTED_GROUP
if (sum_func_count && !group_list && (func_count || field_count))
if (implicit_grouping)
{
my_message(ER_WRONG_SUM_SELECT,ER(ER_WRONG_SUM_SELECT),MYF(0));
goto err;
@ -891,15 +907,23 @@ JOIN::optimize()
}
#endif
/* Optimize count(*), min() and max() */
if (tables_list && tmp_table_param.sum_func_count && ! group_list)
/*
Try to optimize count(*), min() and max() to const fields if
there is implicit grouping (aggregate functions but no
group_list). In this case, the result set shall only contain one
row.
*/
if (tables_list && implicit_grouping)
{
int res;
/*
opt_sum_query() returns HA_ERR_KEY_NOT_FOUND if no rows match
to the WHERE conditions,
or 1 if all items were resolved,
or 1 if all items were resolved (optimized away),
or 0, or an error number HA_ERR_...
If all items were resolved by opt_sum_query, there is no need to
open any tables.
*/
if ((res=opt_sum_query(select_lex->leaf_tables, all_fields, conds)))
{
@ -968,6 +992,12 @@ JOIN::optimize()
DBUG_RETURN(1);
}
if (select_lex->olap == ROLLUP_TYPE && rollup_process_const_fields())
{
DBUG_PRINT("error", ("Error: rollup_process_fields() failed"));
DBUG_RETURN(1);
}
/* Remove distinct if only const tables */
select_distinct= select_distinct && (const_tables != tables);
thd_proc_info(thd, "preparing");
@ -1098,7 +1128,7 @@ JOIN::optimize()
join_tab[const_tables].select->quick->get_type() !=
QUICK_SELECT_I::QS_TYPE_GROUP_MIN_MAX))
{
if (group_list &&
if (group_list && rollup.state == ROLLUP::STATE_NONE &&
list_contains_unique_index(join_tab[const_tables].table,
find_field_in_order_list,
(void *) group_list))
@ -1142,7 +1172,8 @@ JOIN::optimize()
if (! hidden_group_fields && rollup.state == ROLLUP::STATE_NONE)
select_distinct=0;
}
else if (select_distinct && tables - const_tables == 1)
else if (select_distinct && tables - const_tables == 1 &&
rollup.state == ROLLUP::STATE_NONE)
{
/*
We are only using one table. In this case we change DISTINCT to a
@ -1241,13 +1272,22 @@ JOIN::optimize()
(!group_list && tmp_table_param.sum_func_count))
order=0;
// Can't use sort on head table if using row cache
// Can't use sort on head table if using join buffering
if (full_join)
{
if (group_list)
simple_group=0;
if (order)
simple_order=0;
TABLE *stable= (sort_by_table == (TABLE *) 1 ?
join_tab[const_tables].table : sort_by_table);
/*
FORCE INDEX FOR ORDER BY can be used to prevent join buffering when
sorting on the first table.
*/
if (!stable || !stable->force_index_order)
{
if (group_list)
simple_group= 0;
if (order)
simple_order= 0;
}
}
/*
@ -1533,12 +1573,8 @@ JOIN::optimize()
}
}
/*
If this join belongs to an uncacheable subquery save
the original join
*/
if (select_lex->uncacheable && !is_top_level_join() &&
init_save_join_tab())
/* If this join belongs to an uncacheable query save the original join */
if (select_lex->uncacheable && init_save_join_tab())
DBUG_RETURN(-1); /* purecov: inspected */
}
@ -2039,7 +2075,8 @@ JOIN::exec()
count_field_types(select_lex, &curr_join->tmp_table_param,
*curr_all_fields, 0);
if (curr_join->group || curr_join->tmp_table_param.sum_func_count ||
if (curr_join->group || curr_join->implicit_grouping ||
curr_join->tmp_table_param.sum_func_count ||
(procedure && (procedure->flags & PROC_GROUP)))
{
if (make_group_fields(this, curr_join))
@ -2274,7 +2311,7 @@ JOIN::destroy()
tab->cleanup();
}
tmp_join->tmp_join= 0;
tmp_table_param.copy_field=0;
tmp_table_param.cleanup();
DBUG_RETURN(tmp_join->destroy());
}
cond_equal= 0;
@ -3379,12 +3416,12 @@ add_key_equal_fields(KEY_FIELD **key_fields, uint and_level,
@retval FALSE it's something else
*/
inline static bool
static bool
is_local_field (Item *field)
{
field= field->real_item();
return field->type() == Item::FIELD_ITEM &&
!((Item_field *)field)->depended_from;
return field->real_item()->type() == Item::FIELD_ITEM
&& !(field->used_tables() & OUTER_REF_TABLE_BIT)
&& !((Item_field *)field->real_item())->depended_from;
}
@ -3630,7 +3667,7 @@ add_key_part(DYNAMIC_ARRAY *keyuse_array,KEY_FIELD *key_field)
{
if (!(form->keys_in_use_for_query.is_set(key)))
continue;
if (form->key_info[key].flags & HA_FULLTEXT)
if (form->key_info[key].flags & (HA_FULLTEXT | HA_SPATIAL))
continue; // ToDo: ft-keys in non-ft queries. SerG
uint key_parts= (uint) form->key_info[key].key_parts;
@ -5678,7 +5715,9 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse,
}
j->ref.key_buff2=j->ref.key_buff+ALIGN_SIZE(length);
j->ref.key_err=1;
j->ref.has_record= FALSE;
j->ref.null_rejecting= 0;
j->ref.use_count= 0;
keyuse=org_keyuse;
store_key **ref_key= j->ref.key_copy;
@ -6512,6 +6551,20 @@ make_join_select(JOIN *join,SQL_SELECT *select,COND *cond)
DBUG_RETURN(0);
}
/**
The default implementation of unlock-row method of READ_RECORD,
used in all access methods.
*/
void rr_unlock_row(st_join_table *tab)
{
READ_RECORD *info= &tab->read_record;
info->file->unlock_row();
}
static void
make_join_readinfo(JOIN *join, ulonglong options)
{
@ -6527,6 +6580,7 @@ make_join_readinfo(JOIN *join, ulonglong options)
TABLE *table=tab->table;
tab->read_record.table= table;
tab->read_record.file=table->file;
tab->read_record.unlock_row= rr_unlock_row;
tab->next_select=sub_select; /* normal select */
/*
@ -6572,6 +6626,7 @@ make_join_readinfo(JOIN *join, ulonglong options)
delete tab->quick;
tab->quick=0;
tab->read_first_record= join_read_key;
tab->read_record.unlock_row= join_read_key_unlock_row;
tab->read_record.read_record= join_no_more_records;
if (table->covering_keys.is_set(tab->ref.key) &&
!table->no_keyread)
@ -8883,7 +8938,7 @@ static uint reset_nj_counters(JOIN *join, List<TABLE_LIST> *join_list)
// ~join->eliminated_tables);
nested_join->n_tables= reset_nj_counters(join, &nested_join->join_list);
}
if (table->table && (table->table->map & ~join->eliminated_tables))
if (!table->table || (table->table->map & ~join->eliminated_tables))
n++;
}
DBUG_RETURN(n);
@ -9047,7 +9102,10 @@ static void restore_prev_nj_state(JOIN_TAB *last)
join->cur_embedding_map&= ~last_emb->nested_join->nj_map;
else if (last_emb->nested_join->n_tables-1 ==
last_emb->nested_join->counter)
{
join->cur_embedding_map|= last_emb->nested_join->nj_map;
break;
}
else
break;
last_emb= last_emb->embedding;
@ -9494,8 +9552,47 @@ static Field *create_tmp_field_from_item(THD *thd, Item *item, TABLE *table,
new_field->set_derivation(item->collation.derivation);
break;
case DECIMAL_RESULT:
new_field= Field_new_decimal::new_decimal_field(item);
{
uint8 dec= item->decimals;
uint8 intg= ((Item_decimal *) item)->decimal_precision() - dec;
uint32 len= item->max_length;
/*
Trying to put too many digits overall in a DECIMAL(prec,dec)
will always throw a warning. We must limit dec to
DECIMAL_MAX_SCALE however to prevent an assert() later.
*/
if (dec > 0)
{
signed int overflow;
dec= min(dec, DECIMAL_MAX_SCALE);
/*
If the value still overflows the field with the corrected dec,
we'll throw out decimals rather than integers. This is still
bad and of course throws a truncation warning.
+1: for decimal point
*/
const int required_length=
my_decimal_precision_to_length(intg + dec, dec,
item->unsigned_flag);
overflow= required_length - len;
if (overflow > 0)
dec= max(0, dec - overflow); // too long, discard fract
else
/* Corrected value fits. */
len= required_length;
}
new_field= new Field_new_decimal(len, maybe_null, item->name,
dec, item->unsigned_flag);
break;
}
case ROW_RESULT:
default:
// This case should never be choosen
@ -10304,6 +10401,7 @@ create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields,
for (; cur_group ; cur_group= cur_group->next, key_part_info++)
{
Field *field=(*cur_group->item)->get_tmp_table_field();
DBUG_ASSERT(field->table == table);
bool maybe_null=(*cur_group->item)->maybe_null;
key_part_info->null_bit=0;
key_part_info->field= field;
@ -11063,6 +11161,12 @@ Next_select_func setup_end_select_func(JOIN *join)
}
else
{
/*
Choose method for presenting result to user. Use end_send_group
if the query requires grouping (has a GROUP BY clause and/or one or
more aggregate functions). Use end_send if the query should not
be grouped.
*/
if ((join->sort_and_group ||
(join->procedure && join->procedure->flags & PROC_GROUP)) &&
!tmp_tbl->precomputed_group_by)
@ -11431,6 +11535,7 @@ evaluate_join_record(JOIN *join, JOIN_TAB *join_tab,
bool not_used_in_distinct=join_tab->not_used_in_distinct;
ha_rows found_records=join->found_records;
COND *select_cond= join_tab->select_cond;
bool select_cond_result= TRUE;
if (error > 0 || (join->thd->is_error())) // Fatal error
return NESTED_LOOP_ERROR;
@ -11442,7 +11547,17 @@ evaluate_join_record(JOIN *join, JOIN_TAB *join_tab,
return NESTED_LOOP_KILLED; /* purecov: inspected */
}
DBUG_PRINT("info", ("select cond 0x%lx", (ulong)select_cond));
if (!select_cond || select_cond->val_int())
if (select_cond)
{
select_cond_result= test(select_cond->val_int());
/* check for errors evaluating the condition */
if (join->thd->is_error())
return NESTED_LOOP_ERROR;
}
if (!select_cond || select_cond_result)
{
/*
There is no select condition or the attached pushed down
@ -11526,7 +11641,7 @@ evaluate_join_record(JOIN *join, JOIN_TAB *join_tab,
return NESTED_LOOP_NO_MORE_ROWS;
}
else
join_tab->read_record.file->unlock_row();
join_tab->read_record.unlock_row(join_tab);
}
else
{
@ -11536,7 +11651,7 @@ evaluate_join_record(JOIN *join, JOIN_TAB *join_tab,
*/
join->examined_rows++;
join->thd->row_count++;
join_tab->read_record.file->unlock_row();
join_tab->read_record.unlock_row(join_tab);
}
return NESTED_LOOP_OK;
}
@ -11916,18 +12031,55 @@ join_read_key(JOIN_TAB *tab)
table->status=STATUS_NOT_FOUND;
return -1;
}
/*
Moving away from the current record. Unlock the row
in the handler if it did not match the partial WHERE.
*/
if (tab->ref.has_record && tab->ref.use_count == 0)
{
tab->read_record.file->unlock_row();
tab->ref.has_record= FALSE;
}
error=table->file->index_read_map(table->record[0],
tab->ref.key_buff,
make_prev_keypart_map(tab->ref.key_parts),
HA_READ_KEY_EXACT);
if (error && error != HA_ERR_KEY_NOT_FOUND && error != HA_ERR_END_OF_FILE)
return report_error(table, error);
if (! error)
{
tab->ref.has_record= TRUE;
tab->ref.use_count= 1;
}
}
else if (table->status == 0)
{
DBUG_ASSERT(tab->ref.has_record);
tab->ref.use_count++;
}
table->null_row=0;
return table->status ? -1 : 0;
}
/**
Since join_read_key may buffer a record, do not unlock
it if it was not used in this invocation of join_read_key().
Only count locks, thus remembering if the record was left unused,
and unlock already when pruning the current value of
TABLE_REF buffer.
@sa join_read_key()
*/
static void
join_read_key_unlock_row(st_join_table *tab)
{
DBUG_ASSERT(tab->ref.use_count);
if (tab->ref.use_count)
tab->ref.use_count--;
}
/*
ref access method implementation: "read_first" function
@ -13995,7 +14147,10 @@ static int remove_dup_with_compare(THD *thd, TABLE *table, Field **first_field,
if (error)
{
if (error == HA_ERR_RECORD_DELETED)
continue;
{
error= file->rnd_next(record);
continue;
}
if (error == HA_ERR_END_OF_FILE)
break;
goto err;
@ -15928,32 +16083,7 @@ bool JOIN::rollup_init()
{
item->maybe_null= 1;
found_in_group= 1;
if (item->const_item())
{
/*
For ROLLUP queries each constant item referenced in GROUP BY list
is wrapped up into an Item_func object yielding the same value
as the constant item. The objects of the wrapper class are never
considered as constant items and besides they inherit all
properties of the Item_result_field class.
This wrapping allows us to ensure writing constant items
into temporary tables whenever the result of the ROLLUP
operation has to be written into a temporary table, e.g. when
ROLLUP is used together with DISTINCT in the SELECT list.
Usually when creating temporary tables for a intermidiate
result we do not include fields for constant expressions.
*/
Item* new_item= new Item_func_rollup_const(item);
if (!new_item)
return 1;
new_item->fix_fields(thd, (Item **) 0);
thd->change_item_tree(it.ref(), new_item);
for (ORDER *tmp= group_tmp; tmp; tmp= tmp->next)
{
if (*tmp->item == item)
thd->change_item_tree(tmp->item, new_item);
}
}
break;
}
}
if (item->type() == Item::FUNC_ITEM && !found_in_group)
@ -15972,6 +16102,59 @@ bool JOIN::rollup_init()
}
return 0;
}
/**
Wrap all constant Items in GROUP BY list.
For ROLLUP queries each constant item referenced in GROUP BY list
is wrapped up into an Item_func object yielding the same value
as the constant item. The objects of the wrapper class are never
considered as constant items and besides they inherit all
properties of the Item_result_field class.
This wrapping allows us to ensure writing constant items
into temporary tables whenever the result of the ROLLUP
operation has to be written into a temporary table, e.g. when
ROLLUP is used together with DISTINCT in the SELECT list.
Usually when creating temporary tables for a intermidiate
result we do not include fields for constant expressions.
@retval
0 if ok
@retval
1 on error
*/
bool JOIN::rollup_process_const_fields()
{
ORDER *group_tmp;
Item *item;
List_iterator<Item> it(all_fields);
for (group_tmp= group_list; group_tmp; group_tmp= group_tmp->next)
{
if (!(*group_tmp->item)->const_item())
continue;
while ((item= it++))
{
if (*group_tmp->item == item)
{
Item* new_item= new Item_func_rollup_const(item);
if (!new_item)
return 1;
new_item->fix_fields(thd, (Item **) 0);
thd->change_item_tree(it.ref(), new_item);
for (ORDER *tmp= group_tmp; tmp; tmp= tmp->next)
{
if (*tmp->item == item)
thd->change_item_tree(tmp->item, new_item);
}
break;
}
}
it.rewind();
}
return 0;
}
/**