database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2025-07-30 16:24:05 +03:00
Code Activity

An implementation of index intersect via a modified Unique class.

Browse Source 
This code is planned to be used for mwl#21.
This commit is contained in:
Igor Babaev
2010-09-13 15:22:11 -07:00
parent 5719ca5c51
commit 69dd773b67
9 changed files with 598 additions and 76 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
sql/sql_class.h
View File

@ -2949,6 +2949,7 @@ class user_var_entry
DTCollation collation;
};
/*
Unique -- class for unique (removing of duplicates).
Puts all values to the TREE. If the tree becomes too big,
@ -2967,11 +2968,14 @@ class Unique :public Sql_alloc
uchar *record_pointers;
bool flush();
uint size;
uint full_size;
uint min_dupl_count;
public:
ulong elements;
Unique(qsort_cmp2 comp_func, void *comp_func_fixed_arg,
uint size_arg, ulonglong max_in_memory_size_arg);
uint size_arg, ulonglong max_in_memory_size_arg,
uint min_dupl_count_arg= 0);
~Unique();
ulong elements_in_tree() { return tree.elements_in_tree; }
inline bool unique_add(void *ptr)
@ -2983,6 +2987,9 @@ public:
DBUG_RETURN(!tree_insert(&tree, ptr, 0, tree.custom_arg));
}
bool is_in_memory() { return (my_b_tell(&file) == 0); }
void close_for_expansion() { tree.flag= TREE_ONLY_DUPS; }
bool get(TABLE *table);
static double get_use_cost(uint *buffer, uint nkeys, uint key_size,
ulonglong max_in_memory_size);
@ -3002,6 +3009,11 @@ public:
friend int unique_write_to_file(uchar* key, element_count count, Unique *unique);
friend int unique_write_to_ptrs(uchar* key, element_count count, Unique *unique);
friend int unique_write_to_file_with_count(uchar* key, element_count count,
Unique *unique);
friend int unique_intersect_write_to_ptrs(uchar* key, element_count count,
Unique *unique);
};