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MDEV-34888 Implement SEMIJOIN() and SUBQUERY() hints

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This commit is contained in:
Oleg Smirnov
2024-09-11 19:53:57 +07:00
parent e3bf4c826c
commit 2c8f6058c1
28 changed files with 3712 additions and 164 deletions
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44
sql/sql_list.h
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@@ -531,7 +531,6 @@ public:
}
class Iterator;
class Const_Iterator;
using value_type= T;
using iterator= Iterator;
iterator begin() const { return iterator(first); }
@@ -579,49 +578,6 @@ public:
private:
list_node *node{&end_of_list};
};
class Const_Iterator
{
public:
using iterator_category= std::forward_iterator_tag;
using value_type= const T;
using difference_type= std::ptrdiff_t;
using pointer= const T *;
using reference= const T &;
Const_Iterator(const list_node *p= &end_of_list) : node{p} {}
Const_Iterator &operator++()
{
DBUG_ASSERT(node != &end_of_list);
node= node->next;
return *this;
}
Const_Iterator operator++(int)
{
Const_Iterator tmp(*this);
operator++();
return tmp;
}
const T &operator*() { return *static_cast<const T *>(node->info); }
const T *operator->() { return static_cast<const T *>(node->info); }
bool operator==(const typename List<T>::const_iterator &rhs)
{
return node == rhs.node;
}
bool operator!=(const typename List<T>::const_iterator &rhs)
{
return node != rhs.node;
}
private:
const list_node* node{&end_of_list};
};
};