MySQL 8.0.30
Source Code Documentation
RowIDIntersectionIterator Class Reference

#include <rowid_ordered_retrieval.h>

Inheritance diagram for RowIDIntersectionIterator:

Public Member Functions

 RowIDIntersectionIterator (THD *thd, MEM_ROOT *return_mem_root, TABLE *table_arg, bool retrieve_full_rows, bool need_rows_in_rowid_order, Mem_root_array< unique_ptr_destroy_only< RowIterator > > children, unique_ptr_destroy_only< RowIterator > cpk_child)
 ~RowIDIntersectionIterator () override
bool Init () override
 Initialize or reinitialize the iterator. More...
int Read () override
 Read a single row. More...
ucharlast_rowid () const override
- Public Member Functions inherited from RowIDCapableRowIterator
 RowIDCapableRowIterator (THD *thd, TABLE *table)
- Public Member Functions inherited from TableRowIterator
 TableRowIterator (THD *thd, TABLE *table)
void UnlockRow () override
 The default implementation of unlock-row method of RowIterator, used in all access methods except EQRefIterator. More...
void SetNullRowFlag (bool is_null_row) override
 Mark the current row buffer as containing a NULL row or not, so that if you read from it and the flag is true, you'll get only NULLs no matter what is actually in the buffer (typically some old leftover row). More...
void StartPSIBatchMode () override
 Start performance schema batch mode, if supported (otherwise ignored). More...
void EndPSIBatchModeIfStarted () override
 Ends performance schema batch mode, if started. More...
- Public Member Functions inherited from RowIterator
 RowIterator (THD *thd)
virtual ~RowIterator ()=default
 RowIterator (const RowIterator &)=delete
 RowIterator (RowIterator &&)=default
virtual const IteratorProfilerGetProfiler () const
 Get profiling data for this iterator (for 'EXPLAIN ANALYZE'). More...
virtual void SetOverrideProfiler ([[maybe_unused]] const IteratorProfiler *profiler)
virtual RowIteratorreal_iterator ()
 If this iterator is wrapping a different iterator (e.g. More...
virtual const RowIteratorreal_iterator () const

Private Member Functions

bool init_ror_merged_scan ()

Private Attributes

Mem_root_array< unique_ptr_destroy_only< RowIterator > > m_children
unique_ptr_destroy_only< RowIteratorm_cpk_child
bool retrieve_full_rows
bool scans_inited
const bool need_rows_in_rowid_order
bool inited = false

Additional Inherited Members

- Protected Member Functions inherited from TableRowIterator
int HandleError (int error)
void PrintError (int error)
TABLEtable () const
- Protected Member Functions inherited from RowIterator
THDthd () const

Constructor & Destructor Documentation

◆ RowIDIntersectionIterator()

RowIDIntersectionIterator::RowIDIntersectionIterator ( THD thd,
MEM_ROOT return_mem_root,
TABLE table_arg,
bool  retrieve_full_rows,
bool  need_rows_in_rowid_order,
Mem_root_array< unique_ptr_destroy_only< RowIterator > >  children,
unique_ptr_destroy_only< RowIterator cpk_child 

◆ ~RowIDIntersectionIterator()

RowIDIntersectionIterator::~RowIDIntersectionIterator ( )

Member Function Documentation

◆ Init()

bool RowIDIntersectionIterator::Init ( )

Initialize or reinitialize the iterator.

You must always call Init() before trying a Read() (but Init() does not imply Read()).

You can call Init() multiple times; subsequent calls will rewind the iterator (or reposition it, depending on whether the iterator takes in e.g. a TABLE_REF) and allow you to read the records anew.

Implements RowIterator.

◆ init_ror_merged_scan()

bool RowIDIntersectionIterator::init_ror_merged_scan ( )

◆ last_rowid()

uchar * RowIDIntersectionIterator::last_rowid ( ) const

◆ Read()

int RowIDIntersectionIterator::Read ( )

Read a single row.

The row data is not actually returned from the function; it is put in the table's (or tables', in case of a join) record buffer, ie., table->records[0].

Return values
-1End of records

Implements RowIterator.

Member Data Documentation

◆ inited

bool RowIDIntersectionIterator::inited = false

◆ m_children

Mem_root_array<unique_ptr_destroy_only<RowIterator> > RowIDIntersectionIterator::m_children

◆ m_cpk_child

unique_ptr_destroy_only<RowIterator> RowIDIntersectionIterator::m_cpk_child

◆ m_last_rowid

uchar* RowIDIntersectionIterator::m_last_rowid

◆ need_rows_in_rowid_order

const bool RowIDIntersectionIterator::need_rows_in_rowid_order

◆ retrieve_full_rows

bool RowIDIntersectionIterator::retrieve_full_rows

◆ scans_inited

bool RowIDIntersectionIterator::scans_inited

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