Commit 3e801322 authored by unknown's avatar unknown

Merge spetrunia@bk-internal.mysql.com:/home/bk/mysql-4.1

into mysql.com:/home/psergey/mysql-4.1-bug8877


sql/sql_select.cc:
  Auto merged
parents 1780abf2 ebbe7058
This diff is collapsed.
......@@ -31,6 +31,11 @@ typedef struct keyuse_t {
uint key, keypart, optimize;
key_part_map keypart_map;
ha_rows ref_table_rows;
/*
If true, the comparison this value was created from will not be
satisfied if val has NULL 'value'.
*/
bool null_rejecting;
} KEYUSE;
class store_key;
......@@ -45,6 +50,11 @@ typedef struct st_table_ref
byte *key_buff2; // key_buff+key_length
store_key **key_copy; //
Item **items; // val()'s for each keypart
/*
(null_rejecting & (1<<i)) means the condition is '=' and no matching
rows will be produced if items[i] IS NULL (see add_not_null_conds())
*/
key_part_map null_rejecting;
table_map depend_map; // Table depends on these tables.
byte *null_ref_key; // null byte position in the key_buf.
// used for REF_OR_NULL optimization.
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment