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MDEV-36094 Row ID filtering for reverse-ordered scans
Add tests showing that RowID filtering is not enabled for reverse-ordered scans.
This commit is contained in:
Dave Gosselin
Dave Gosselin
parent
7e4233746e
commit
24b5c3021d
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[myisam]
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default-storage-engine=myisam
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[innodb]
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innodb
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default-storage-engine=innodb
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134
mysql-test/main/mdev-36094-rowid-filter-reverse-scan.result
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134
mysql-test/main/mdev-36094-rowid-filter-reverse-scan.result
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create table t1 (a int, b int);
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insert into t1 (a, b) values
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(1, 1000),
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(2, 2000),
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(3, 3000),
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(4, 4000),
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(5, 5000),
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(6, 6000),
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(7, 7000),
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(8, 8000),
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(9, 9000),
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(10, 10000);
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create index t1_a on t1 (a);
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create index t1_b on t1 (b);
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set @old_where_cost=@@optimizer_where_cost;
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set session optimizer_where_cost=10;
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explain format=json select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"cost": "COST_REPLACED",
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"nested_loop": [
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{
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"table": {
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"table_name": "t1",
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"access_type": "range",
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"possible_keys": ["t1_a", "t1_b"],
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"key": "t1_b",
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"key_length": "5",
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"used_key_parts": ["b"],
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"loops": 1,
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"rows": 1,
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"cost": "COST_REPLACED",
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"filtered": 60,
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"index_condition": "t1.b between 4000 and 4100",
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"attached_condition": "t1.a between 3 and 8"
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}
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}
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]
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}
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}
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select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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a b
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4 4000
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flush status;
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select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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a b
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4 4000
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SELECT * FROM information_schema.SESSION_STATUS WHERE VARIABLE_NAME LIKE '%icp%';
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VARIABLE_NAME VARIABLE_VALUE
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HANDLER_ICP_ATTEMPTS 1
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HANDLER_ICP_MATCH 1
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explain format=json select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"cost": "COST_REPLACED",
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"nested_loop": [
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{
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"table": {
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"table_name": "t1",
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"access_type": "range",
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"possible_keys": ["t1_a", "t1_b"],
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"key": "t1_b",
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"key_length": "5",
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"used_key_parts": ["b"],
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"loops": 1,
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"rows": 2,
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"cost": "COST_REPLACED",
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"filtered": 80,
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"index_condition": "t1.b between 4000 and 5001",
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"attached_condition": "t1.a between 2 and 9"
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}
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}
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]
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}
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}
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select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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a b
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5 5000
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4 4000
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flush status;
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select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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a b
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5 5000
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4 4000
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SELECT * FROM information_schema.SESSION_STATUS WHERE VARIABLE_NAME LIKE '%icp%';
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VARIABLE_NAME VARIABLE_VALUE
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HANDLER_ICP_ATTEMPTS 2
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HANDLER_ICP_MATCH 2
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set @old_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='index_condition_pushdown=off';
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explain format=json select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"cost": "COST_REPLACED",
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"nested_loop": [
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{
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"table": {
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"table_name": "t1",
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"access_type": "range",
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"possible_keys": ["t1_a", "t1_b"],
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"key": "t1_b",
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"key_length": "5",
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"used_key_parts": ["b"],
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"loops": 1,
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"rows": 1,
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"cost": "COST_REPLACED",
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"filtered": 60,
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"attached_condition": "t1.a between 3 and 8 and t1.b between 4000 and 4100"
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}
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}
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]
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}
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}
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select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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a b
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4 4000
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flush status;
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select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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a b
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5 5000
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4 4000
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SELECT * FROM information_schema.SESSION_STATUS WHERE VARIABLE_NAME LIKE '%icp%';
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VARIABLE_NAME VARIABLE_VALUE
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HANDLER_ICP_ATTEMPTS 0
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HANDLER_ICP_MATCH 0
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set optimizer_switch=@old_optimizer_switch;
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set session optimizer_where_cost=@old_where_cost;
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drop table t1;
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53
mysql-test/main/mdev-36094-rowid-filter-reverse-scan.test
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53
mysql-test/main/mdev-36094-rowid-filter-reverse-scan.test
Normal file
@ -0,0 +1,53 @@
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create table t1 (a int, b int);
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insert into t1 (a, b) values
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(1, 1000),
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(2, 2000),
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(3, 3000),
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(4, 4000),
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(5, 5000),
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(6, 6000),
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(7, 7000),
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(8, 8000),
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(9, 9000),
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(10, 10000);
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create index t1_a on t1 (a);
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create index t1_b on t1 (b);
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# set the WHERE clause cost higher to force the use of the rowid filter
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set @old_where_cost=@@optimizer_where_cost;
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set session optimizer_where_cost=10;
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--source include/explain-no-costs.inc
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explain format=json select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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--disable_ps_protocol
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flush status;
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select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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SELECT * FROM information_schema.SESSION_STATUS WHERE VARIABLE_NAME LIKE '%icp%';
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--enable_ps_protocol
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--source include/explain-no-costs.inc
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explain format=json select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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--disable_ps_protocol
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flush status;
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select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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SELECT * FROM information_schema.SESSION_STATUS WHERE VARIABLE_NAME LIKE '%icp%';
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--enable_ps_protocol
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set @old_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='index_condition_pushdown=off';
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--source include/explain-no-costs.inc
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explain format=json select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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select * from t1 where t1.a between 3 and 8 and t1.b between 4000 and 4100 order by t1.b desc;
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--disable_ps_protocol
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flush status;
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select * from t1 where t1.a between 2 and 9 and t1.b between 4000 and 5001 order by t1.b desc;
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SELECT * FROM information_schema.SESSION_STATUS WHERE VARIABLE_NAME LIKE '%icp%';
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--enable_ps_protocol
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set optimizer_switch=@old_optimizer_switch;
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set session optimizer_where_cost=@old_where_cost;
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drop table t1;
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