Classes
struct	QueryBlock
	A query block to be materialized by MaterializeIterator. More...

Functions
RowIterator *	CreateIterator (THD thd, Mem_root_array< materialize_iterator::QueryBlock > query_blocks_to_materialize, const MaterializePathParameters path_params, unique_ptr_destroy_only< RowIterator > table_iterator, JOIN *join)
	Create an iterator that materializes a set of row into a temporary table and sets up a (pre-existing) iterator to access that. More...

Function Documentation

◆ CreateIterator()

RowIterator * materialize_iterator::CreateIterator	(	THD *	thd,
		Mem_root_array< materialize_iterator::QueryBlock >	query_blocks_to_materialize,
		const MaterializePathParameters *	path_params,
		unique_ptr_destroy_only< RowIterator >	table_iterator,
		JOIN *	join
	)

Create an iterator that materializes a set of row into a temporary table and sets up a (pre-existing) iterator to access that.

Parameters

thd	Thread handler.
query_blocks_to_materialize	List of query blocks to materialize.
path_params	MaterializePath settings.
table_iterator	Iterator used for accessing the temporary table after materialization.
join	When materializing within the same JOIN (e.g., into a temporary table before sorting), as opposed to a derived table or a CTE, we may need to change the slice on the join before returning rows from the result table. If so, join and ref_slice would need to be set, and query_blocks_to_materialize should contain only one member, with the same join.