temptable_aggregate_iterator Namespace Reference

Functions
RowIterator *	CreateIterator (THD *thd, unique_ptr_destroy_only< RowIterator > subquery_iterator, Temp_table_param *temp_table_param, TABLE *table, unique_ptr_destroy_only< RowIterator > table_iterator, JOIN *join, int ref_slice)
	Create an iterator that aggregates the output rows from another iterator into a temporary table and then sets up a (pre-existing) iterator to access the temporary table. More...

Function Documentation

CreateIterator()

RowIterator * temptable_aggregate_iterator::CreateIterator	(	THD *	thd,
		unique_ptr_destroy_only< RowIterator >	subquery_iterator,
		Temp_table_param *	temp_table_param,
		TABLE *	table,
		unique_ptr_destroy_only< RowIterator >	table_iterator,
		JOIN *	join,
		int	ref_slice
	)

Create an iterator that aggregates the output rows from another iterator into a temporary table and then sets up a (pre-existing) iterator to access the temporary table.

See also

TemptableAggregateIterator.

Parameters

thd	Thread handler.
subquery_iterator	input to aggregation.
temp_table_param	temporary table settings.
table_iterator	Iterator used for scanning the temporary table after materialization.
table	the temporary table.
join	the JOIN in which we aggregate.
ref_slice	the slice to set when accessing temporary table; used if anything upstream wants to evaluate values based on its contents.

Returns

the iterator.