Compare the keys of an index. More...

#include <ddl0impl-compare.h>

Public Member Functions
	Compare_key (const dict_index_t index, Dup dups, bool compare_all) noexcept
	Constructor. More...

	Compare_key (const Compare_key &)=default

	~Compare_key ()=default
	Destructor. More...

int	operator() (const dfield_t lhs, const dfield_t rhs) const noexcept
	Compare two tuples. More...

Public Attributes
Dup *	m_dups {}
	For collecting duplicates. More...

const size_t	m_n_unique {}
	Number of unique fields in the index key. More...

const size_t	m_n_fields {}
	Total number of fields in the index key. More...

const dict_field_t *	m_fields {}
	Index key fields. More...

Detailed Description

Compare the keys of an index.

Constructor & Destructor Documentation

◆ Compare_key() [1/2]

ddl::Compare_key::Compare_key	(	const dict_index_t *	index,
		Dup *	dups,
		bool	compare_all
	)

inlinenoexcept

Constructor.

Parameters

[in]	index	Compare the keys of this index.
[in,out]	dups	For capturing the duplicate entries.
[in]	compare_all	If set, compare all columns in the key.

◆ Compare_key() [2/2]

ddl::Compare_key::Compare_key ( const Compare_key & )

default

◆ ~Compare_key()

ddl::Compare_key::~Compare_key ( )

default

Destructor.

Member Function Documentation

◆ operator()()

int ddl::Compare_key::operator()	(	const dfield_t *	lhs,
		const dfield_t *	rhs
	)		const

inlinenoexcept

Compare two tuples.

Parameters

[in]	lhs	Tuple to compare on the left hand side
[in]	rhs	Tuple to compare on the Right hand side

Return values

+ve	- if lhs > rhs
-ve	- if lhs < rhs
0	- if lhs == rhs

Member Data Documentation

◆ m_dups

Dup* ddl::Compare_key::m_dups {}

For collecting duplicates.

◆ m_fields

const dict_field_t* ddl::Compare_key::m_fields {}

Index key fields.

◆ m_n_fields

const size_t ddl::Compare_key::m_n_fields {}

Total number of fields in the index key.

◆ m_n_unique

const size_t ddl::Compare_key::m_n_unique {}

Number of unique fields in the index key.

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

storage/innobase/include/ddl0impl-compare.h

Public Member Functions

Public Attributes