sql_sort.h File Reference

#include <assert.h>
#include "map_helpers.h"
#include "my_base.h"
#include "my_sys.h"
#include "sql/filesort_utils.h"
#include "sql/mem_root_array.h"

Go to the source code of this file.

Classes
struct	Merge_chunk
	Descriptor for a merge chunk to be sort-merged. More...
class	Sort_result
class	Filesort_info
	A class wrapping misc buffers used for sorting. More...

Typedefs
typedef Bounds_checked_array< Merge_chunk >	Merge_chunk_array
typedef Bounds_checked_array< uchar >	Sort_buffer

Functions
template<typename Heap_type >
void	reuse_freed_buff (Merge_chunk *old_top, Heap_type *heap)
	Put all room used by freed buffer to use in adjacent buffer. More...

Variables
constexpr size_t	MERGEBUFF = 7
constexpr size_t	MERGEBUFF2 = 15
constexpr size_t	VARLEN_PREFIX = 4

Typedef Documentation

Merge_chunk_array

typedef Bounds_checked_array<Merge_chunk> Merge_chunk_array

Sort_buffer

typedef Bounds_checked_array<uchar> Sort_buffer

Function Documentation

reuse_freed_buff()

template<typename Heap_type >

void reuse_freed_buff	(	Merge_chunk *	old_top,
		Heap_type *	heap
	)

Put all room used by freed buffer to use in adjacent buffer.

Note, that we can't simply distribute memory evenly between all buffers, because new areas must not overlap with old ones.

Variable Documentation

MERGEBUFF

constexpr size_t MERGEBUFF = 7

constexpr

MERGEBUFF2

constexpr size_t MERGEBUFF2 = 15

constexpr

VARLEN_PREFIX

constexpr size_t VARLEN_PREFIX = 4

constexpr