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Backport of subquery optimizations to 5.3.

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There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
This commit is contained in:
Sergey Petrunya
2010-01-17 17:51:10 +03:00
parent 1a490f2da4
commit b83cb52e9e
57 changed files with 30727 additions and 504 deletions
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31
sql/mysql_priv.h
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@@ -359,6 +359,12 @@ protected:
*/
#define MATCHING_ROWS_IN_OTHER_TABLE 10
/*
Subquery materialization-related constants
*/
#define HEAP_TEMPTABLE_LOOKUP_COST 0.05
#define DISK_TEMPTABLE_LOOKUP_COST 1.0
/** Don't pack string keys shorter than this (if PACK_KEYS=1 isn't used). */
#define KEY_DEFAULT_PACK_LENGTH 8
@@ -542,11 +548,16 @@ protected:
#define OPTIMIZER_SWITCH_INDEX_MERGE_INTERSECT 8
#define OPTIMIZER_SWITCH_INDEX_COND_PUSHDOWN 16
#define OPTIMIZER_SWITCH_FIRSTMATCH 32
#define OPTIMIZER_SWITCH_LOOSE_SCAN 64
#define OPTIMIZER_SWITCH_MATERIALIZATION 128
#define OPTIMIZER_SWITCH_SEMIJOIN 256
#ifdef DBUG_OFF
# define OPTIMIZER_SWITCH_LAST 32
# define OPTIMIZER_SWITCH_LAST 512
#else
# define OPTIMIZER_SWITCH_TABLE_ELIMINATION 32
# define OPTIMIZER_SWITCH_LAST 64
# define OPTIMIZER_SWITCH_TABLE_ELIMINATION 512
# define OPTIMIZER_SWITCH_LAST 1024
#endif
#ifdef DBUG_OFF
@@ -555,14 +566,22 @@ protected:
OPTIMIZER_SWITCH_INDEX_MERGE_UNION | \
OPTIMIZER_SWITCH_INDEX_MERGE_SORT_UNION | \
OPTIMIZER_SWITCH_INDEX_MERGE_INTERSECT | \
OPTIMIZER_SWITCH_INDEX_COND_PUSHDOWN)
OPTIMIZER_SWITCH_INDEX_COND_PUSHDOWN | \
OPTIMIZER_SWITCH_FIRSTMATCH | \
OPTIMIZER_SWITCH_LOOSE_SCAN | \
OPTIMIZER_SWITCH_MATERIALIZATION | \
OPTIMIZER_SWITCH_SEMIJOIN)
#else
# define OPTIMIZER_SWITCH_DEFAULT (OPTIMIZER_SWITCH_INDEX_MERGE | \
OPTIMIZER_SWITCH_INDEX_MERGE_UNION | \
OPTIMIZER_SWITCH_INDEX_MERGE_SORT_UNION | \
OPTIMIZER_SWITCH_INDEX_MERGE_INTERSECT | \
OPTIMIZER_SWITCH_INDEX_COND_PUSHDOWN | \
OPTIMIZER_SWITCH_TABLE_ELIMINATION)
OPTIMIZER_SWITCH_TABLE_ELIMINATION | \
OPTIMIZER_SWITCH_FIRSTMATCH | \
OPTIMIZER_SWITCH_LOOSE_SCAN | \
OPTIMIZER_SWITCH_MATERIALIZATION | \
OPTIMIZER_SWITCH_SEMIJOIN)
#endif
/*
@@ -1848,6 +1867,8 @@ void print_cached_tables(void);
void TEST_filesort(SORT_FIELD *sortorder,uint s_length);
void print_plan(JOIN* join,uint idx, double record_count, double read_time,
double current_read_time, const char *info);
void print_keyuse_array(DYNAMIC_ARRAY *keyuse_array);
void print_sjm(SJ_MATERIALIZATION_INFO *sjm);
#endif
void mysql_print_status();
/* key.cc */