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Merge in fix for BUG#727667

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This commit is contained in:
Sergey Petrunya
2011-03-25 12:47:44 +03:00
parent ec23949158 0fe8c972c6
commit 201fb06db9
11 changed files with 109 additions and 22 deletions
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10
sql/sql_select.h
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@ -79,6 +79,8 @@ typedef struct keyuse_t {
class store_key;
const int NO_REF_PART= uint(-1);
typedef struct st_table_ref
{
bool key_err;
@ -109,8 +111,16 @@ typedef struct st_table_ref
*/
key_part_map null_rejecting;
table_map depend_map; ///< Table depends on these tables.
/* null byte position in the key_buf. Used for REF_OR_NULL optimization */
uchar *null_ref_key;
/*
ref_or_null optimization: number of key part that alternates between
the lookup value or NULL (there's only one such part).
If we're not using ref_or_null, the value is NO_REF_PART
*/
uint null_ref_part;
/*
The number of times the record associated with this key was used
in the join.