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MDEV-34041 Display additional information for materialized subqueries in EXPLAIN/ANALYZE FORMAT=JSON

This commits adds the "materialization" block to the output of
EXPLAIN/ANALYZE FORMAT=JSON when materialized subqueries are involved
into processing. In the case of ANALYZE additional runtime information
is displayed, such as:
  - chosen strategy of materialization
  - number of partial match/index lookup loops
  - sizes of partial match buffers
This commit is contained in:
Oleg Smirnov
2024-05-04 19:50:55 +07:00
parent a5e4c34991
commit aae3233c4f
14 changed files with 2024 additions and 615 deletions

View File

@ -140,12 +140,24 @@ public:
DBUG_ASSERT(idx < array.elements);
return *(((Elem*)array.buffer) + idx);
}
/// Const variant of at(), which cannot change data
const Elem& at(size_t idx) const
{
return *(((Elem*)array.buffer) + idx);
}
Elem& operator[](size_t idx)
{
return at(idx);
}
/// Const variant of operator[]
const Elem& operator[](size_t idx) const
{
return at(idx);
}
/// @returns pointer to first element
Elem *front()
{