cmp_varlen_keys.h File Reference

#include <assert.h>
#include <stdio.h>
#include <functional>
#include "sql/sort_param.h"
#include "sql/sql_array.h"

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Classes
struct	Merge_chunk_greater
	This struct is used for merging chunks for filesort() For filesort() with fixed-size keys we use memcmp to compare rows. More...

Functions
bool	cmp_varlen_keys (Bounds_checked_array< st_sort_field > sort_field_array, bool use_hash, const uchar *s1, const uchar *s2)
	A compare function for variable-length keys used by filesort(). More...

Function Documentation

cmp_varlen_keys()

bool cmp_varlen_keys ( Bounds_checked_array< st_sort_field >  sort_field_array, bool  use_hash, const uchar *  s1, const uchar *  s2  )

inline

A compare function for variable-length keys used by filesort().

For record format documentation,

See also

Sort_param.

Parameters

sort_field_array	array of field descriptors for sorting
use_hash	compare hash values (for grouping of JSON data)
s1	pointer to record 1
s2	pointer to record 2

Returns

true/false according to sorting order true : s1 < s2 false : s1 >= s2