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MDEV-30469 (refactoring) Support ORDER BY and LIMIT for multi-table DELETE...

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This patch includes a few changes to make the code easier to maintain:
  - Renamed SQL_I_List::link_in_list to SQL_I_List::insert.  link_in_list was
  ambiguous as it could refer to a link or it could refer to a node
  - Remove field_name local variable in multi_update::initialize_tables because
  it is not used when creating the temporary tables
  - multi_update changes:
    - Move temp table callocs to init, a more natural location for them, and moved
    tables_to_update to const member variable so we don't recompute it.
    - Filter out jtbm tables and tables not in the update map, pushing those that
    will be updated into an update_targets container.  This simplifies checks and
    loops in initialize_tables.
This commit is contained in:
Dave Gosselin
2024-12-03 09:48:17 -05:00
parent dfdbec1636
commit 02dc8615f2
12 changed files with 108 additions and 100 deletions
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2
sql/sql_derived.cc
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@@ -1112,7 +1112,7 @@ bool mysql_derived_create(THD *thd, LEX *lex, TABLE_LIST *derived)
void TABLE_LIST::register_as_derived_with_rec_ref(With_element *rec_elem)
{
rec_elem->derived_with_rec_ref.link_in_list(this, &this->next_with_rec_ref);
rec_elem->derived_with_rec_ref.insert(this, &this->next_with_rec_ref);
is_derived_with_recursive_reference= true;
get_unit()->uncacheable|= UNCACHEABLE_DEPENDENT;
}