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| author | Igor Babaev <igor@askmonty.org> | 2019-02-03 14:56:12 -0800 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2019-02-03 14:56:12 -0800 |
| commit | 658128af43b4d7c6db445164f8ed25ed4d1e3109 (patch) | |
| tree | 7a71580cca55759b8bb2730e117436478948d77f /mysql-test/main/partition_pruning.result | |
| parent | 5f46670bd09babbee75a24ac82eb4ade0706da66 (diff) | |
| download | mariadb-git-658128af43b4d7c6db445164f8ed25ed4d1e3109.tar.gz | |
MDEV-16188 Use in-memory PK filters built from range index scans
This patch contains a full implementation of the optimization
that allows to use in-memory rowid / primary filters built for range
conditions over indexes. In many cases usage of such filters reduce
the number of disk seeks spent for fetching table rows.
In this implementation the choice of what possible filter to be applied
(if any) is made purely on cost-based considerations.
This implementation re-achitectured the partial implementation of
the feature pushed by Galina Shalygina in the commit
8d5a11122c32f4d9eb87536886c6e893377bdd07.
Besides this patch contains a better implementation of the generic
handler function handler::multi_range_read_info_const() that
takes into account gaps between ranges when calculating the cost of
range index scans. It also contains some corrections of the
implementation of the handler function records_in_range() for MyISAM.
This patch supports the feature for InnoDB and MyISAM.
Diffstat (limited to 'mysql-test/main/partition_pruning.result')
| -rw-r--r-- | mysql-test/main/partition_pruning.result | 130 |
1 files changed, 66 insertions, 64 deletions
diff --git a/mysql-test/main/partition_pruning.result b/mysql-test/main/partition_pruning.result index 00bd24101d6..14e076b0e68 100644 --- a/mysql-test/main/partition_pruning.result +++ b/mysql-test/main/partition_pruning.result @@ -18,7 +18,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra # # # # # # # # # 3 # EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < 7; id select_type table partitions type possible_keys key key_len ref rows Extra -# # # # # # # # # 9 # +# # # # # # # # # 10 # EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 1; id select_type table partitions type possible_keys key key_len ref rows Extra # # # # # # # # # 3 # @@ -105,7 +105,7 @@ a 6 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < 7; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,p5,max range PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index SELECT * FROM t1 WHERE a <= 1; a -1 @@ -168,7 +168,7 @@ a 6 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,p5,max range PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index SELECT * FROM t1 WHERE a <= 7; a -1 @@ -182,7 +182,7 @@ a 7 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 7; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,p5,max range PRIMARY PRIMARY 4 NULL 9 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,p5,max index PRIMARY PRIMARY 4 NULL 10 Using where; Using index SELECT * FROM t1 WHERE a = 1; a 1 @@ -424,7 +424,7 @@ a 5 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,max range PRIMARY PRIMARY 4 NULL 8 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index SELECT * FROM t1 WHERE a <= 1; a -1 @@ -474,7 +474,7 @@ a 5 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 5; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,max range PRIMARY PRIMARY 4 NULL 8 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index SELECT * FROM t1 WHERE a <= 6; a -1 @@ -487,7 +487,7 @@ a 6 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0,p1,p2,p3,p4,max range PRIMARY PRIMARY 4 NULL 8 Using where; Using index +1 SIMPLE t1 p0,p1,p2,p3,p4,max index PRIMARY PRIMARY 4 NULL 9 Using where; Using index SELECT * FROM t1 WHERE a = 1; a 1 @@ -744,41 +744,41 @@ a 1001-01-01 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p2001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1001-01-01 system a NULL NULL NULL 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using index # Disabling warnings for the invalid date EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 index a a 4 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 index a a 4 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p2001-01-01 index a a 4 NULL 4 Using where; Using index @@ -790,16 +790,16 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01,p2001-01-01 index a a 4 NULL 7 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-02' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p1001-01-01,p2001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-01' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 pNULL,p0001-01-01,p1001-01-01 index a a 4 NULL 6 Using where; Using index # test without index ALTER TABLE t1 DROP KEY a; SELECT * FROM t1 WHERE a < '1001-01-01'; @@ -1073,41 +1073,41 @@ a 1001-01-01 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1001-01-01 system a NULL NULL NULL 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using index # Disabling warnings for the invalid date EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index @@ -1119,16 +1119,16 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-02' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p1001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-01' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index # test without index ALTER TABLE t1 DROP KEY a; SELECT * FROM t1 WHERE a < '1001-01-01'; @@ -1402,41 +1402,41 @@ a 1001-01-01 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1001-01-01 system a NULL NULL NULL 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a > '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p2001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a = '1001-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using index # Disabling warnings for the invalid date EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a < '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a <= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a >= '1999-02-31'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2001-01-01,pNULL index a a 4 NULL 4 Using where; Using index @@ -1448,16 +1448,16 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL ref a a 4 const 1 Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 5 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0000-00-00' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 range a a 4 NULL 4 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p0000-01-02,p1001-01-01 index a a 4 NULL 6 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-02' AND '1002-00-00'; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 pNULL,p1001-01-01 index a a 4 NULL 4 Using where; Using index EXPLAIN PARTITIONS SELECT * FROM t1 WHERE a BETWEEN '0001-01-01' AND '1001-01-01'; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 range a a 4 NULL 3 Using where; Using index +1 SIMPLE t1 p0001-01-01,pNULL,p1001-01-01 index a a 4 NULL 5 Using where; Using index # test without index ALTER TABLE t1 DROP KEY a; SELECT * FROM t1 WHERE a < '1001-01-01'; @@ -2670,12 +2670,14 @@ create table t1 (a int not null, b int not null, key(a), key(b)) partition by hash(a) partitions 4; insert into t1 values (1,1),(2,2),(3,3),(4,4); insert into t1 values (5,5),(6,6),(7,7),(8,8); +insert into t1 values (9,9),(10,10),(11,11),(12,12); +insert into t1 values (13,13),(14,14),(15,15),(16,16); explain partitions select * from t1 X, t1 Y where X.b = Y.b and (X.a=1 or X.a=2) and (Y.a=2 or Y.a=3); id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE X p1,p2 range a,b a 4 NULL 4 Using where -1 SIMPLE Y p2,p3 ref a,b b 4 test.X.b 2 Using where +1 SIMPLE Y p2,p3 ref|filter a,b b|a 4|4 test.X.b 2 (50%) Using where; Using filter explain partitions select * from t1 X, t1 Y where X.a = Y.a and (X.a=1 or X.a=2); id select_type table partitions type possible_keys key key_len ref rows Extra @@ -2867,15 +2869,15 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2 ALL NULL NULL NULL NULL 510 Using where explain partitions select * from t2 where b = 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0,p1,p2,p3,p4 ref b b 5 const 76 +1 SIMPLE t2 p0,p1,p2,p3,p4 ref b b 5 const 77 explain extended select * from t2 where b = 6; id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 ref b b 5 const 76 100.00 +1 SIMPLE t2 ref b b 5 const 77 100.00 Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` = 6 explain partitions select * from t2 where b = 6; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0,p1,p2,p3,p4 ref b b 5 const 76 +1 SIMPLE t2 p0,p1,p2,p3,p4 ref b b 5 const 77 explain extended select * from t2 where b in (1,3,5); id select_type table type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 ALL b NULL NULL NULL 910 40.66 Using where @@ -2886,7 +2888,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL b NULL NULL NULL 910 Using where explain extended select * from t2 where b in (2,4,6); id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 ALL b NULL NULL NULL 910 25.05 Using where +1 SIMPLE t2 ALL b NULL NULL NULL 910 25.38 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` in (2,4,6) explain partitions select * from t2 where b in (2,4,6); @@ -2894,7 +2896,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL b NULL NULL NULL 910 Using where explain extended select * from t2 where b in (7,8,9); id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 ALL b NULL NULL NULL 910 36.70 Using where +1 SIMPLE t2 ALL b NULL NULL NULL 910 36.81 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` in (7,8,9) explain partitions select * from t2 where b in (7,8,9); @@ -2902,7 +2904,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL b NULL NULL NULL 910 Using where explain extended select * from t2 where b > 5; id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 ALL b NULL NULL NULL 910 44.84 Using where +1 SIMPLE t2 ALL b NULL NULL NULL 910 44.62 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` > 5 explain partitions select * from t2 where b > 5; @@ -2910,7 +2912,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL b NULL NULL NULL 910 Using where explain extended select * from t2 where b > 5 and b < 8; id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 ALL b NULL NULL NULL 910 22.09 Using where +1 SIMPLE t2 ALL b NULL NULL NULL 910 22.20 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` > 5 and `test`.`t2`.`b` < 8 explain partitions select * from t2 where b > 5 and b < 8; @@ -2918,15 +2920,15 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t2 p0,p1,p2,p3,p4 ALL b NULL NULL NULL 910 Using where explain extended select * from t2 where b > 5 and b < 7; id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 range b b 5 NULL 76 100.00 Using where +1 SIMPLE t2 range b b 5 NULL 77 100.00 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` > 5 and `test`.`t2`.`b` < 7 explain partitions select * from t2 where b > 5 and b < 7; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t2 p0,p1,p2,p3,p4 range b b 5 NULL 76 Using where +1 SIMPLE t2 p0,p1,p2,p3,p4 range b b 5 NULL 77 Using where explain extended select * from t2 where b > 0 and b < 5; id select_type table type possible_keys key key_len ref rows filtered Extra -1 SIMPLE t2 ALL b NULL NULL NULL 910 41.65 Using where +1 SIMPLE t2 ALL b NULL NULL NULL 910 41.87 Using where Warnings: Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b` from `test`.`t2` where `test`.`t2`.`b` > 0 and `test`.`t2`.`b` < 5 explain partitions select * from t2 where b > 0 and b < 5; @@ -3376,16 +3378,16 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1 const PRIMARY PRIMARY 8 const,const 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 1 AND c2 >= 1; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 2 Using where +1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 1 AND c2 > 1; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 1 AND c2 < 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1 range PRIMARY PRIMARY 8 NULL 1 Using where +1 SIMPLE t1 p1 range PRIMARY PRIMARY 8 NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 1 AND c2 <= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 2 Using where +1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 2 AND c2 <= 3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 2 Using where @@ -3394,7 +3396,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2 const PRIMARY PRIMARY 8 const,const 1 EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 2 AND c2 >= 3; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p2 range PRIMARY PRIMARY 8 NULL 1 Using where +1 SIMPLE t1 p2 range PRIMARY PRIMARY 8 NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 2 AND c2 > 3; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2 range PRIMARY PRIMARY 8 NULL 1 Using where @@ -3403,7 +3405,7 @@ id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 2 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 2 AND c2 <= 4; id select_type table partitions type possible_keys key key_len ref rows Extra -1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 2 Using where +1 SIMPLE t1 p1,p2 range PRIMARY PRIMARY 8 NULL 3 Using where EXPLAIN PARTITIONS SELECT * FROM t1 WHERE c1 = 2 AND c2 = 4; id select_type table partitions type possible_keys key key_len ref rows Extra 1 SIMPLE t1 p2 const PRIMARY PRIMARY 8 const,const 1 @@ -3463,7 +3465,7 @@ select * from t1 where company_id = 1000 and dept_id in (select dept_id from t2 where COMPANY_ID = 1000); id select_type table partitions type possible_keys key key_len ref rows Extra -1 PRIMARY t2 p_1000 ref PRIMARY PRIMARY 8 const 2 Using index +1 PRIMARY t2 p_1000 ref PRIMARY PRIMARY 8 const 3 Using index 1 PRIMARY t1 p_1000 ALL PRIMARY NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join) drop table t1,t2; # |