anonymous_namespace{join_optimizer.cc}::AbsorbedFields Class Reference

A pair of bitsets representing the fields for which an index access applies predicates, and for which of those fields the predicates are applied fully. More...

Public Member Functions
	AbsorbedFields (OverflowBitset applied, OverflowBitset subsumed)
OverflowBitset	applied () const
	The fields whose predicates are applied by an index access. More...
OverflowBitset	subsumed () const
	The fields whose predicates are fully applied by an index access. More...

Private Attributes
OverflowBitset	m_applied
OverflowBitset	m_subsumed

Detailed Description

A pair of bitsets representing the fields for which an index access applies predicates, and for which of those fields the predicates are applied fully.

The bits map to the field with the same index in the TABLE::field array.

Constructor & Destructor Documentation

AbsorbedFields()

anonymous_namespace{join_optimizer.cc}::AbsorbedFields::AbsorbedFields ( OverflowBitset  applied, OverflowBitset  subsumed  )

inline

Member Function Documentation

applied()

OverflowBitset anonymous_namespace{join_optimizer.cc}::AbsorbedFields::applied ( ) const

inline

The fields whose predicates are applied by an index access.

subsumed()

OverflowBitset anonymous_namespace{join_optimizer.cc}::AbsorbedFields::subsumed ( ) const

inline

The fields whose predicates are fully applied by an index access.

Those predicates do not have to be applied again in a FILTER access path. This is a subset of the fields in the "applied" bitset.

Member Data Documentation

m_applied

OverflowBitset anonymous_namespace{join_optimizer.cc}::AbsorbedFields::m_applied

private

m_subsumed

OverflowBitset anonymous_namespace{join_optimizer.cc}::AbsorbedFields::m_subsumed

private

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

• sql/join_optimizer/join_optimizer.cc