When a query containing a WITH clause is printed by EXPLAIN
EXTENDED command there should not be any data expansion in
the query specifications of the WITH elements of this WITH
clause.
The code for st_select_lex::find_table_def_in_with_clauses()
did not take into account the fact that the specs for mergeable
CTEs were cloned and were not processed by the function
With_element::check_dependencies_in_spec().
Make the new (CTE-related) code in set_explain_type to take into
account that some JOIN_TABs are non-merged semi-joins, and do not
have a TABLE object.
Added comments.
Added reaction for exceeding maximum number of elements in with clause.
Added a test case to check this reaction.
Added a test case where the specification of a recursive table
uses two non-recursive with tables.
explain for the query containing WITH clause
with an unreferenced CTE caused a crash.
Added a test covered this case.
Also added a test for usage CTE in different parts of union.
The patch for bug mdev-9937 actually did not fix the problem
of name resolution for tables used in views referred in queries
with WITH clauses. This fix corrects the patch.
Added test cases to check the fix.
Fixed the problem of wrong types of recursive tables when the type of anchor part does not coincide with the
type of recursive part.
Prevented usage of marerialization and subquery cache for subqueries with recursive references.
Introduced system variables 'max_recursion_level'.
Added a test case to test usage of this variable.
When the specification of a WITH table referred to a view
that used a based table with the same name as the WITH table
the server went into an infinite loop because it erroneously
resolved the reference to the base table as the reference to
the WITH table.
With tables used in a view cannot be searched for beyond the
scope the view.
of mdev-8789.
Fixed a bug in TABLE_LIST::print.
Fixed another bug for the case when the definition of a
WITH table contained column list while the join in the main
query used two instances of this table.
