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merge

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This commit is contained in:
monty@narttu.mysql.fi
2003-10-07 11:24:38 +03:00
parent cb334d03f4 73cb1a52d2
commit b31a79df3e
4 changed files with 50 additions and 46 deletions
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4
sql/ha_myisam.cc
View File

@ -898,7 +898,7 @@ int ha_myisam::index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,active_index, key, key_len, (enum ha_rkey_function)find_flag);
int error=mi_rkey(file,buf,active_index, key, key_len, find_flag);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}
@ -907,7 +907,7 @@ int ha_myisam::index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag)
{
statistic_increment(ha_read_key_count,&LOCK_status);
int error=mi_rkey(file,buf,index, key, key_len, (enum ha_rkey_function)find_flag);
int error=mi_rkey(file,buf,index, key, key_len, find_flag);
table->status=error ? STATUS_NOT_FOUND: 0;
return error;
}

73
sql/item_subselect.cc
View File

@ -36,7 +36,7 @@ inline Item * and_items(Item* cond, Item *item)
Item_subselect::Item_subselect():
Item_result_field(), engine_owner(1), value_assigned(0), substitution(0),
have_to_be_excluded(0), engine_changed(0)
engine(0), have_to_be_excluded(0), engine_changed(0)
{
reset();
/*
@ -46,6 +46,7 @@ Item_subselect::Item_subselect():
null_value= 1;
}
void Item_subselect::init(THD *thd, st_select_lex *select_lex,
select_subselect *result)
{
@ -62,6 +63,7 @@ void Item_subselect::init(THD *thd, st_select_lex *select_lex,
DBUG_VOID_RETURN;
}
Item_subselect::~Item_subselect()
{
if (engine_owner)
@ -767,6 +769,7 @@ Item_in_subselect::row_value_transformer(JOIN *join,
DBUG_RETURN(RES_OK);
}
Item_subselect::trans_res
Item_in_subselect::select_transformer(JOIN *join)
{
@ -776,6 +779,7 @@ Item_in_subselect::select_transformer(JOIN *join)
return row_value_transformer(join, left_expr);
}
Item_subselect::trans_res
Item_allany_subselect::select_transformer(JOIN *join)
{
@ -786,9 +790,9 @@ subselect_single_select_engine::
subselect_single_select_engine(THD *thd,
st_select_lex *select,
select_subselect *result,
Item_subselect *item):
subselect_engine(thd, item, result),
prepared(0), optimized(0), executed(0)
Item_subselect *item)
:subselect_engine(thd, item, result),
prepared(0), optimized(0), executed(0)
{
select_lex= select;
SELECT_LEX_UNIT *unit= select_lex->master_unit();
@ -807,11 +811,12 @@ subselect_single_select_engine::
this->select_lex= select_lex;
}
subselect_union_engine::subselect_union_engine(THD *thd,
st_select_lex_unit *u,
select_subselect *result,
Item_subselect *item):
subselect_engine(thd, item, result)
Item_subselect *item)
:subselect_engine(thd, item, result)
{
unit= u;
if (!result)
@ -994,6 +999,7 @@ int subselect_union_engine::exec()
return res;
}
int subselect_uniquesubquery_engine::exec()
{
DBUG_ENTER("subselect_uniquesubquery_engine::exec");
@ -1015,34 +1021,22 @@ int subselect_uniquesubquery_engine::exec()
{
error= 0;
table->null_row= 0;
if (table->status)
((Item_in_subselect *) item)->value= 0;
else
((Item_in_subselect *) item)->value= (!cond || cond->val_int()?1:0);
((Item_in_subselect *) item)->value= (!table->status &&
(!cond || cond->val_int()) ? 1 :
0);
}
}
DBUG_RETURN(end_exec(table) || (error != 0));
}
int subselect_uniquesubquery_engine::end_exec(TABLE *table)
{
DBUG_ENTER("subselect_uniquesubquery_engine::end_exec");
int error=0, tmp;
if ((tmp= table->file->extra(HA_EXTRA_NO_CACHE)))
{
DBUG_PRINT("error", ("extra(HA_EXTRA_NO_CACHE) failed"));
error= 1;
}
if ((tmp= table->file->index_end()))
{
DBUG_PRINT("error", ("index_end() failed"));
error= 1;
}
if (error == 1)
table->file->print_error(tmp, MYF(0));
DBUG_RETURN(error != 0);
}
subselect_uniquesubquery_engine::~subselect_uniquesubquery_engine()
{
/* Tell handler we don't need the index anymore */
tab->table->file->index_end();
}
int subselect_indexsubquery_engine::exec()
{
DBUG_ENTER("subselect_indexsubselect_engine::exec");
@ -1051,9 +1045,11 @@ int subselect_indexsubquery_engine::exec()
TABLE *table= tab->table;
((Item_in_subselect *) item)->value= 0;
if (check_null)
{
*tab->null_ref_key= 0;
/* We need to check for NULL if there wasn't a matching value */
*tab->null_ref_key= 0; // Search first for not null
((Item_in_subselect *) item)->was_null= 0;
}
@ -1071,7 +1067,7 @@ int subselect_indexsubquery_engine::exec()
error= report_error(table, error);
else
{
for(;;)
for (;;)
{
error= 0;
table->null_row= 0;
@ -1083,7 +1079,7 @@ int subselect_indexsubquery_engine::exec()
((Item_in_subselect *) item)->was_null= 1;
else
((Item_in_subselect *) item)->value= 1;
goto finish;
break;
}
error= table->file->index_next_same(table->record[0],
tab->ref.key_buff,
@ -1091,25 +1087,26 @@ int subselect_indexsubquery_engine::exec()
if (error && error != HA_ERR_END_OF_FILE)
{
error= report_error(table, error);
goto finish;
break;
}
}
else
{
if (!check_null || null_finding)
goto finish;
break; /* We don't need to check nulls */
*tab->null_ref_key= 1;
null_finding= 1;
if (safe_index_read(tab))
goto finish;
/* Check if there exists a row with a null value in the index */
if ((error= safe_index_read(tab)))
break;
}
}
}
}
finish:
DBUG_RETURN(end_exec(table) || (error != 0));
DBUG_RETURN(error != 0);
}
uint subselect_single_select_engine::cols()
{
return select_lex->item_list.elements;

11
sql/item_subselect.h
View File

@ -243,6 +243,7 @@ public:
friend class subselect_indexsubquery_engine;
};
/* ALL/ANY/SOME subselect */
class Item_allany_subselect :public Item_in_subselect
{
@ -258,6 +259,7 @@ public:
trans_res select_transformer(JOIN *join);
};
class subselect_engine: public Sql_alloc
{
protected:
@ -289,6 +291,7 @@ public:
bool may_be_null() { return maybe_null; };
};
class subselect_single_select_engine: public subselect_engine
{
my_bool prepared; /* simple subselect is prepared */
@ -309,6 +312,7 @@ public:
void exclude();
};
class subselect_union_engine: public subselect_engine
{
st_select_lex_unit *unit; /* corresponding unit structure */
@ -326,6 +330,7 @@ public:
void exclude();
};
struct st_join_table;
class subselect_uniquesubquery_engine: public subselect_engine
{
@ -338,17 +343,17 @@ public:
Item_subselect *subs, Item *where)
:subselect_engine(thd, subs, 0), tab(tab_arg), cond(where)
{}
~subselect_uniquesubquery_engine();
int prepare();
void fix_length_and_dec(Item_cache** row);
int exec();
uint cols() { return 1; }
bool dependent() { return 1; }
bool uncacheable() { return 1; }
void exclude();
static int end_exec(TABLE *table);
void exclude();
};
class subselect_indexsubquery_engine: public subselect_uniquesubquery_engine
{
bool check_null;

8
sql/mysqld.cc
View File

@ -5634,14 +5634,16 @@ static uint set_maximum_open_files(uint max_file_limit)
rlimit.rlim_cur=rlimit.rlim_max=max_file_limit;
if (setrlimit(RLIMIT_NOFILE,&rlimit))
{
sql_print_error("Warning: setrlimit couldn't increase number of open files to more than %lu (request: %u)",
old_cur, max_file_limit); /* purecov: inspected */
if (global_system_variables.log_warnings)
sql_print_error("Warning: setrlimit couldn't increase number of open files to more than %lu (request: %u)",
old_cur, max_file_limit); /* purecov: inspected */
max_file_limit=old_cur;
}
else
{
(void) getrlimit(RLIMIT_NOFILE,&rlimit);
if ((uint) rlimit.rlim_cur != max_file_limit)
if ((uint) rlimit.rlim_cur != max_file_limit &&
global_system_variables.log_warnings)
sql_print_error("Warning: setrlimit returned ok, but didn't change limits. Max open files is %ld (request: %u)",
(ulong) rlimit.rlim_cur,
max_file_limit); /* purecov: inspected */