Besides the access paths for a set of nodes (see m_access_paths), AccessPathSet contains information that is common between all access paths for that set. More...

Public Member Functions
	AccessPathSet (const JoinHypergraph &graph, NodeMap nodes, FunctionalDependencySet functional_dependencies, OrderingSet obsolete_orderings_arg)

Public Attributes
AccessPathArray	paths {PSI_NOT_INSTRUMENTED}

FunctionalDependencySet	active_functional_dependencies {0}

OrderingSet	obsolete_orderings {0}

NodeMap	reachable_nodes {0}

bool	always_empty {false}

Detailed Description

Besides the access paths for a set of nodes (see m_access_paths), AccessPathSet contains information that is common between all access paths for that set.

One would believe num_output_rows would be such a member (a set of tables should produce the same number of output rows no matter the join order), but due to parameterized paths, different access paths could have different outputs. delayed_predicates is another, but currently, it's already efficiently hidden space-wise due to the use of a union.

Constructor & Destructor Documentation

◆ AccessPathSet()

anonymous_namespace{join_optimizer.cc}::CostingReceiver::AccessPathSet::AccessPathSet	(	const JoinHypergraph &	graph,
		NodeMap	nodes,
		FunctionalDependencySet	functional_dependencies,
		OrderingSet	obsolete_orderings_arg
	)

inline

Member Data Documentation

◆ active_functional_dependencies

FunctionalDependencySet anonymous_namespace{join_optimizer.cc}::CostingReceiver::AccessPathSet::active_functional_dependencies {0}

◆ always_empty

bool anonymous_namespace{join_optimizer.cc}::CostingReceiver::AccessPathSet::always_empty {false}

◆ obsolete_orderings

OrderingSet anonymous_namespace{join_optimizer.cc}::CostingReceiver::AccessPathSet::obsolete_orderings {0}

◆ paths

AccessPathArray anonymous_namespace{join_optimizer.cc}::CostingReceiver::AccessPathSet::paths {PSI_NOT_INSTRUMENTED}

◆ reachable_nodes

NodeMap anonymous_namespace{join_optimizer.cc}::CostingReceiver::AccessPathSet::reachable_nodes {0}

The documentation for this struct was generated from the following file:

sql/join_optimizer/join_optimizer.cc

Public Member Functions

Public Attributes