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fixed subquery in the FROM clause with parameter (BUG#3020)

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sql/sql_derived.cc:
  do not execute subqueries in the FROM clause in PS preparation
tests/client_test.c:
  test of subquery in FROM clause with parameter
This commit is contained in:
unknown 2004-04-08 23:28:47 +03:00
parent d57ffe071a
commit 52a62ce0b0
2 changed files with 82 additions and 28 deletions
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62
sql/sql_derived.cc
View file

@ -148,36 +148,42 @@ static int mysql_derived(THD *thd, LEX *lex, SELECT_LEX_UNIT *unit,
}
derived_result->set_table(table);
if (is_union)
/*
if it is preparation PS only then we do not need real data and we
can skip execution (and parameters is not defined, too)
*/
if (!thd->current_statement)
{
// execute union without clean up
if (!(res= unit->prepare(thd, derived_result, SELECT_NO_UNLOCK)))
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;
if (is_union)
{
// execute union without clean up
if (!(res= unit->prepare(thd, derived_result, SELECT_NO_UNLOCK)))
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);
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)

48
tests/client_test.c
View file

@ -8905,6 +8905,53 @@ static void test_bind_nagative()
myquery(rc);
}
static void test_derived()
{
MYSQL_STMT *stmt;
int rc, i;
MYSQL_BIND bind[1];
long my_val = 0L;
long my_length = 0L;
long my_null = 0L;
const char *query=
"select count(1) from (select f.id from t1 f where f.id=?) as x";
myheader("test_derived");
rc = mysql_query(mysql, "DROP TABLE IF EXISTS t1");
myquery(rc);
rc= mysql_query(mysql,"create table t1 (id int(8), primary key (id)) \
TYPE=InnoDB DEFAULT CHARSET=utf8");
myquery(rc);
rc= mysql_query(mysql, "insert into t1 values (1)");
myquery(rc);
stmt= mysql_prepare(mysql, query, strlen(query));
mystmt_init(stmt);
bind[0].buffer_type = FIELD_TYPE_LONG;
bind[0].buffer = (char *)&my_val;
bind[0].length = &my_length;
bind[0].is_null = (char*)&my_null;
my_val= 1;
rc= mysql_bind_param(stmt, bind);
mystmt(stmt,rc);
for (i= 0; i < 3; i++)
{
rc= mysql_execute(stmt);
mystmt(stmt, rc);
assert(1 == my_process_stmt_result(stmt));
}
mysql_stmt_close(stmt);
rc= mysql_query(mysql, "DROP TABLE t1");
myquery(rc);
}
/*
Read and parse arguments and MySQL options from my.cnf
*/
@ -9172,6 +9219,7 @@ int main(int argc, char **argv)
test_multi(); /* test of multi delete & update */
test_insert_select(); /* test INSERT ... SELECT */
test_bind_nagative(); /* bind negative to unsigned BUG#3223 */
test_derived(); /* derived table with parameter BUG#3020 */
end_time= time((time_t *)0);
total_time+= difftime(end_time, start_time);