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merge 4.1->5.0

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bell@sanja.is.com.ua
2005-03-31 10:39:48 +03:00
parent 8098ef79f0 7647ac833f
commit 05d4ed14e4
24 changed files with 2028 additions and 554 deletions
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26
sql/sql_select.cc
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@ -7802,14 +7802,7 @@ Field *create_tmp_field(THD *thd, TABLE *table,Item *item, Item::Type type,
return create_tmp_field_from_item(thd, item, table, copy_func, modify_item,
convert_blob_length);
case Item::TYPE_HOLDER:
{
Field *example= ((Item_type_holder *)item)->example();
if (example)
return create_tmp_field_from_field(thd, example, item->name, table, NULL,
convert_blob_length);
return create_tmp_field_from_item(thd, item, table, copy_func, 0,
convert_blob_length);
}
return ((Item_type_holder *)item)->make_field_by_type(table);
default: // Dosen't have to be stored
return 0;
}
@ -10584,7 +10577,19 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
/* Found key that can be used to retrieve data in sorted order */
if (tab->ref.key >= 0)
{
tab->ref.key= new_ref_key;
/*
We'll use ref access method on key new_ref_key. In general case
the index search tuple for new_ref_key will be different (e.g.
when one of the indexes only covers prefix of the field, see
BUG#9213 in group_by.test).
So we build tab->ref from scratch here.
*/
KEYUSE *keyuse= tab->keyuse;
while (keyuse->key != new_ref_key && keyuse->table == tab->table)
keyuse++;
if (create_ref_for_key(tab->join, tab, keyuse,
tab->join->const_table_map))
DBUG_RETURN(0);
}
else
{
@ -13188,7 +13193,8 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit, select_result *result)
unit->fake_select_lex->select_number= UINT_MAX; // jost for initialization
unit->fake_select_lex->type= "UNION RESULT";
unit->fake_select_lex->options|= SELECT_DESCRIBE;
if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK | SELECT_DESCRIBE)))
if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK | SELECT_DESCRIBE,
"")))
res= unit->exec();
res|= unit->cleanup();
}