anonymous_namespace{access_path.cc} Namespace Reference

Classes
struct	IteratorToBeCreated

Functions
bool	ShouldEnableBatchMode (AccessPath *path)
bool	FinalizeMaterializedSubqueries (THD *thd, JOIN *join, AccessPath *path)
	If the path is a FILTER path marked that subqueries are to be materialized, do so. More...
void	SetupJobsForChildren (MEM_ROOT *mem_root, AccessPath *child, JOIN *join, bool eligible_for_batch_mode, IteratorToBeCreated *job, Mem_root_array< IteratorToBeCreated > *todo)
void	SetupJobsForChildren (MEM_ROOT *mem_root, AccessPath *outer, AccessPath *inner, JOIN *join, bool inner_eligible_for_batch_mode, IteratorToBeCreated *job, Mem_root_array< IteratorToBeCreated > *todo)

Function Documentation

FinalizeMaterializedSubqueries()

bool anonymous_namespace{access_path.cc}::FinalizeMaterializedSubqueries	(	THD *	thd,
		JOIN *	join,
		AccessPath *	path
	)

If the path is a FILTER path marked that subqueries are to be materialized, do so.

If not, do nothing.

It is important that this is not called until the entire plan is ready; not just when planning a single query block. The reason is that a query block A with materializable subqueries may itself be part of a materializable subquery B, so if one calls this when planning A, the subqueries in A will irrevocably be materialized, even if that is not the optimal plan given B. Thus, this is done when creating iterators.

SetupJobsForChildren() [1/2]

void anonymous_namespace{access_path.cc}::SetupJobsForChildren	(	MEM_ROOT *	mem_root,
		AccessPath *	child,
		JOIN *	join,
		bool	eligible_for_batch_mode,
		IteratorToBeCreated *	job,
		Mem_root_array< IteratorToBeCreated > *	todo
	)

SetupJobsForChildren() [2/2]

void anonymous_namespace{access_path.cc}::SetupJobsForChildren	(	MEM_ROOT *	mem_root,
		AccessPath *	outer,
		AccessPath *	inner,
		JOIN *	join,
		bool	inner_eligible_for_batch_mode,
		IteratorToBeCreated *	job,
		Mem_root_array< IteratorToBeCreated > *	todo
	)

ShouldEnableBatchMode()

bool anonymous_namespace{access_path.cc}::ShouldEnableBatchMode

(

AccessPath *

path

)