ddl::Key_sort_buffer_cursor Struct Reference

For loading an index from a sorted buffer. More...

Inheritance diagram for ddl::Key_sort_buffer_cursor:

Public Member Functions
	Key_sort_buffer_cursor (Builder *builder, Key_sort_buffer *key_buffer) noexcept
	Constructor. More...
dberr_t	open () noexcept
	Open the cursor. More...
dberr_t	fetch (dtuple_t *&dtuple) noexcept override
	Fetch the current row as a tuple. More...
dberr_t	next () noexcept override
	Move to the next record. More...
Public Member Functions inherited from ddl::Load_cursor
	Load_cursor (Builder *builder, Dup *dup) noexcept
	Default constructor. More...
virtual	~Load_cursor () override=default
	Default destructor. More...
dberr_t	get_err () const noexcept
bool	duplicates_detected () const noexcept override
Public Member Functions inherited from Btree_load::Cursor
	Cursor ()=default
	Constructor. More...
virtual	~Cursor ()=default
	Destructor. More...

Private Attributes
dtuple_t *	m_dtuple {}
	Tuple to return. More...
size_t	m_n_rows {}
	Number of rows read from the key buffer. More...
ulint *	m_offsets {}
	Row offsets. More...
Scoped_heap	m_heap {}
	Heap for m_offsets and m_buf. More...
const mrec_t *	m_mrec {}
	Current merge row in m_aligned_buffer. More...
Key_sort_buffer *	m_key_buffer {}
	Key buffer to read from. More...

Additional Inherited Members
Public Attributes inherited from ddl::Load_cursor
Dup *	m_dup {}
	Duplicate checking and reporting. More...
dberr_t	m_err {DB_SUCCESS}
	Operation error code. More...
Builder *	m_builder {}
	Index meta data. More...
Scoped_heap	m_tuple_heap {}
	Heap for the raw row to dtuple_t conversion. More...

Detailed Description

For loading an index from a sorted buffer.

Constructor & Destructor Documentation

Key_sort_buffer_cursor()

ddl::Key_sort_buffer_cursor::Key_sort_buffer_cursor ( Builder *  builder, Key_sort_buffer *  key_buffer  )

inlinenoexcept

Constructor.

Parameters

[in,out]	builder	Index builder.
[in,out]	key_buffer	Key buffer to load from.

Member Function Documentation

fetch()

dberr_t ddl::Key_sort_buffer_cursor::fetch ( dtuple_t *&  dtuple )

overridevirtualnoexcept

Fetch the current row as a tuple.

Note: Tuple columns are shallow copies.

Parameters

[out]

dtuple

Row represented as a tuple.

Returns

DB_SUCCESS, DB_END_OF_INDEX or error code.

Implements Btree_load::Cursor.

next()

dberr_t ddl::Key_sort_buffer_cursor::next ( void  )

overridevirtualnoexcept

Move to the next record.

Returns

DB_SUCCESS, DB_END_OF_INDEX or error code.

Implements Btree_load::Cursor.

open()

dberr_t ddl::Key_sort_buffer_cursor::open ( )

noexcept

Open the cursor.

Returns

DB_SUCCESS or error code.

Member Data Documentation

m_dtuple

dtuple_t* ddl::Key_sort_buffer_cursor::m_dtuple {}

private

Tuple to return.

m_heap

Scoped_heap ddl::Key_sort_buffer_cursor::m_heap {}

private

Heap for m_offsets and m_buf.

m_key_buffer

Key_sort_buffer* ddl::Key_sort_buffer_cursor::m_key_buffer {}

private

Key buffer to read from.

m_mrec

const mrec_t* ddl::Key_sort_buffer_cursor::m_mrec {}

private

Current merge row in m_aligned_buffer.

m_n_rows

size_t ddl::Key_sort_buffer_cursor::m_n_rows {}

private

Number of rows read from the key buffer.

m_offsets

ulint* ddl::Key_sort_buffer_cursor::m_offsets {}

private

Row offsets.

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

• storage/innobase/ddl/ddl0builder.cc