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Fix bug #11718 query with function, join and order by returns wrong type.

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create_tmp_field_from_item() was creating tmp field without regard to
original field type of Item. This results in wrong type being reported to
client.

To create_tmp_field_from_item() added special handling for Items with 
DATE/TIME field types to preserve their type.


sql/sql_select.cc:
  Fix bug #11718 query with function, join and order by returns wrong type.
tests/mysql_client_test.c:
  Test case for bug #11718: query with function, join and order by returns wrong type
This commit is contained in:
unknown
2005-08-17 23:53:12 +04:00
parent 99cf8c38e0
commit e80aa01087
2 changed files with 44 additions and 1 deletions
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10
sql/sql_select.cc
View File

@ -4899,7 +4899,15 @@ static Field* create_tmp_field_from_item(THD *thd, Item *item, TABLE *table,
item->name, table, item->unsigned_flag);
break;
case STRING_RESULT:
if (item->max_length > 255)
enum enum_field_types type;
/*
DATE/TIME fields have STRING_RESULT result type. To preserve
type they needed to be handled separately.
*/
if ((type= item->field_type()) == MYSQL_TYPE_DATETIME ||
type == MYSQL_TYPE_TIME || type == MYSQL_TYPE_DATE)
new_field= item->tmp_table_field_from_field_type(table);
else if (item->max_length > 255)
{
if (convert_blob_length)
new_field= new Field_varstring(convert_blob_length, maybe_null,

35
tests/mysql_client_test.c
View File

@ -11796,6 +11796,40 @@ static void test_bug12001()
DIE_UNLESS(res==1);
}
/*
Bug#11718: query with function, join and order by returns wrong type
*/
static void test_bug11718()
{
MYSQL_RES *res;
int rc;
const char *query= "select str_to_date(concat(f3),'%Y%m%d') from t1,t2 "
"where f1=f2 order by f1";
myheader("test_bug11718");
rc= mysql_query(mysql, "drop table if exists t1, t2");
myquery(rc);
rc= mysql_query(mysql, "create table t1 (f1 int)");
myquery(rc);
rc= mysql_query(mysql, "create table t2 (f2 int, f3 numeric(8))");
myquery(rc);
rc= mysql_query(mysql, "insert into t1 values (1), (2)");
myquery(rc);
rc= mysql_query(mysql, "insert into t2 values (1,20050101), (2,20050202)");
myquery(rc);
rc= mysql_query(mysql, query);
myquery(rc);
res = mysql_store_result(mysql);
if (!opt_silent)
printf("return type: %s", (res->fields[0].type == MYSQL_TYPE_DATE)?"DATE":
"not DATE");
DIE_UNLESS(res->fields[0].type == MYSQL_TYPE_DATE);
rc= mysql_query(mysql, "drop table t1, t2");
myquery(rc);
}
/*
Read and parse arguments and MySQL options from my.cnf
*/
@ -12013,6 +12047,7 @@ static struct my_tests_st my_tests[]= {
{ "test_bug9735", test_bug9735 },
{ "test_bug11183", test_bug11183 },
{ "test_bug12001", test_bug12001 },
{ "test_bug11718", test_bug11718 },
{ 0, 0 }
};