[ { "name": "TestCollationColumnEstimate", "cases": [ "show stats_topn", "explain select * from t where a='aÄa'", "explain select * from t where a > 'aÄa'" ] }, { "Name": "TestOutOfRangeEstimation", "Cases": [ { "Start": 800, "End": 900 }, { "Start": 900, "End": 950 }, { "Start": 950, "End": 1000 }, { "Start": 1000, "End": 1050 }, { "Start": 1050, "End": 1100 }, { "Start": 1150, "End": 1200 }, { "Start": 1200, "End": 1300 }, { "Start": 1300, "End": 1400 }, { "Start": 1400, "End": 1500 }, { "Start": 1500, "End": 1600 }, { "Start": 300, "End": 899 }, { "Start": 800, "End": 1000 }, { "Start": 900, "End": 1500 }, { "Start": 300, "End": 1500 }, { "Start": 200, "End": 300 }, { "Start": 100, "End": 200 }, { "Start": 200, "End": 400 }, { "Start": 200, "End": 1000 }, { "Start": 0, "End": 100 }, { "Start": -100, "End": 100 }, { "Start": -100, "End": 0 } ] }, { "name": "TestOutOfRangeEstimationAfterDelete", "cases": [ "explain format = 'brief' select * from t where a <= 300", "explain format = 'brief' select * from t where a < 300", "explain format = 'brief' select * from t where a <= 500", "explain format = 'brief' select * from t where a >= 300 and a <= 900", "explain format = 'brief' select * from t where a >= 900", "explain format = 'brief' select * from t where a > 900", "explain format = 'brief' select * from t where a >= 300", "explain format = 'brief' select * from t where a <= 900", "explain format = 'brief' select * from t where a > 800 and a < 1000", "explain format = 'brief' select * from t where a > 900 and a < 1000", "explain format = 'brief' select * from t where a > 900 and a < 1100", "explain format = 'brief' select * from t where a > 200 and a < 300", "explain format = 'brief' select * from t where a > 100 and a < 300", "set @@tidb_opt_objective = 'determinate'", "explain format = 'brief' select * from t where a <= 300", "explain format = 'brief' select * from t where a <= 500", "explain format = 'brief' select * from t where a > 900", "explain format = 'brief' select * from t where a <= 900" ] }, { "name": "TestColumnIndexNullEstimation", "cases": [ "explain select b from t where b is null", "explain select b from t where b is not null", "explain select b from t where b is null or b > 3", "explain select b from t use index(idx_b)", "explain select b from t where b < 4", "explain select * from t where a is null", "explain select * from t where a is not null", "explain select * from t where a is null or a > 3", "explain select * from t", "explain select * from t where a < 4" ] }, { "name": "TestUniqCompEqualEst", "cases": [ "explain select * from t where a = 1 and b = 5 and 1 = 1" ] }, { "name": "TestDNFCondSelectivity", "cases": [ "select * from t where b > 7 or c < 4", "select * from t where d < 5 or b > 6", "select * from t where a > 8 or d < 4 or c > 7 or b < 5", "select * from t where a < 8 and (b > 10 or c < 3 or b > 4) and a > 2" ] }, { "Name": "TestSmallRangeEstimation", "Cases": [ { "Start": 5, "End": 5 }, { "Start": 5, "End": 6 }, { "Start": 5, "End": 10 }, { "Start": 5, "End": 15 }, { "Start": 10, "End": 15 }, { "Start": 5, "End": 25 }, { "Start": 25, "End": 25 } ] }, { "name": "TestTopNAssistedEstimationWithoutNewCollation", "cases": [ "explain format = 'brief' select * from t where a like '%111%'", "explain format = 'brief' select * from t where a not like '%111%'", "explain format = 'brief' select * from t where a regexp '.*111.*'", "explain format = 'brief' select * from t where a not regexp '.*111.*'", "explain format = 'brief' select * from t where ifnull(a, '1111') like '%111%'", "explain format = 'brief' select * from t where f like '%111%'", "explain format = 'brief' select * from t where f not like '%111%'", "explain format = 'brief' select * from t where f regexp '.*111.*'", "explain format = 'brief' select * from t where f not regexp '.*111.*'", "explain format = 'brief' select * from t where ifnull(f, '1111') like '%111%'", "explain format = 'brief' select * from t where a like '%111%' and f rlike '.*111.*'", "explain format = 'brief' select * from t where a like '%111%' or f like '%111%'", "explain format = 'brief' select * from t where b like '%111%'", "explain format = 'brief' select * from t where b not like '%111%'", "explain format = 'brief' select * from t where b regexp '.*111.*'", "explain format = 'brief' select * from t where b not regexp '.*111.*'", "explain format = 'brief' select * from t where ifnull(b, '1111') like '%111%'", "explain format = 'brief' select * from t where b like '%111%' and f like '%111%'", "explain format = 'brief' select * from t where b like '%111%' or f like '%111%'", "explain format = 'brief' select * from t where c like '%111%'", "explain format = 'brief' select * from t where c not like '%111%'", "explain format = 'brief' select * from t where ifnull(c, '1111') like '%111%'", "explain format = 'brief' select * from t where d like '%111%'", "explain format = 'brief' select * from t where d not like '%111%'", "explain format = 'brief' select * from t where ifnull(c, '1111') like '%111%'", "explain format = 'brief' select * from t where e like '%111%'", "explain format = 'brief' select * from t where e not like '%111%'", "explain format = 'brief' select * from t where ifnull(e, '1111') like '%111%'" ] }, { "name": "TestTopNAssistedEstimationWithNewCollation", "cases": [ "explain format = 'brief' select * from t where a like '%111%'", "explain format = 'brief' select * from t where a not like '%111%'", "explain format = 'brief' select * from t where a regexp '.*111.*'", "explain format = 'brief' select * from t where a not regexp '.*111.*'", "explain format = 'brief' select * from t where ifnull(a, '1111') like '%111%'", "explain format = 'brief' select * from t where f like '%111%'", "explain format = 'brief' select * from t where f not like '%111%'", "explain format = 'brief' select * from t where f regexp '.*111.*'", "explain format = 'brief' select * from t where f not regexp '.*111.*'", "explain format = 'brief' select * from t where ifnull(f, '1111') like '%111%'", "explain format = 'brief' select * from t where a like '%111%' and f rlike '.*111.*'", "explain format = 'brief' select * from t where a like '%111%' or f like '%111%'", "explain format = 'brief' select * from t where b like '%111%'", "explain format = 'brief' select * from t where b not like '%111%'", "explain format = 'brief' select * from t where b regexp '.*111.*'", "explain format = 'brief' select * from t where b not regexp '.*111.*'", "explain format = 'brief' select * from t where ifnull(b, '1111') like '%111%'", "explain format = 'brief' select * from t where b like '%111%' and f like '%111%'", "explain format = 'brief' select * from t where b like '%111%' or f like '%111%'", "explain format = 'brief' select * from t where c like '%111%'", "explain format = 'brief' select * from t where c not like '%111%'", "explain format = 'brief' select * from t where ifnull(c, '1111') like '%111%'", "explain format = 'brief' select * from t where d like '%111%'", "explain format = 'brief' select * from t where d not like '%111%'", "explain format = 'brief' select * from t where ifnull(c, '1111') like '%111%'", "explain format = 'brief' select * from t where e like '%111%'", "explain format = 'brief' select * from t where e not like '%111%'", "explain format = 'brief' select * from t where ifnull(e, '1111') like '%111%'" ] }, { "name": "TestGlobalStatsOutOfRangeEstimationAfterDelete", "cases": [ "explain format = 'brief' select * from t where a <= 300", "explain format = 'brief' select * from t where a < 300", "explain format = 'brief' select * from t where a <= 500", "explain format = 'brief' select * from t where a >= 300 and a <= 900", "explain format = 'brief' select * from t where a >= 900", "explain format = 'brief' select * from t where a > 900", "explain format = 'brief' select * from t where a >= 300", "explain format = 'brief' select * from t where a <= 900", "explain format = 'brief' select * from t where a > 800 and a < 1000", "explain format = 'brief' select * from t where a > 900 and a < 1000", "explain format = 'brief' select * from t where a > 900 and a < 1100", "explain format = 'brief' select * from t where a > 200 and a < 300", "explain format = 'brief' select * from t where a > 100 and a < 300" ] }, { "name": "TestOrderingIdxSelectivityThreshold", "cases": [ "set @@tidb_opt_ordering_index_selectivity_ratio = -1", "set @@tidb_opt_ordering_index_selectivity_threshold = 0", "explain format = 'brief' select * from t where b >= 9950 order by c limit 1", "explain format = 'brief' select * from t where b >= 9950 order by c desc limit 1", "explain format = 'brief' select * from t where b >= 8999 order by c limit 1", "explain format = 'brief' select * from t where b >= 9000 order by c limit 1", "explain format = 'brief' select * from t where b >= 9001 order by c limit 1", "explain format = 'brief' select * from t where a < 10001 order by c limit 1", "explain format = 'brief' select * from t where a < 10000 order by c limit 1", "explain format = 'brief' select * from t where a < 9999 order by c limit 1", "explain format = 'brief' select * from t where b >= 0 and b <= 100 or c >= 0 and c <= 100 order by c limit 1", "explain format = 'brief' select * from t where a < 1000 and c < 100 limit 1", "explain format = 'brief' select * from t where d >= 9950 order by c limit 1", "explain format = 'brief' select * from t where d < 9950 order by c limit 1", "set @@tidb_opt_ordering_index_selectivity_threshold = 0.1", "explain format = 'brief' select * from t where b >= 9950 order by c limit 1", "explain format = 'brief' select * from t where b >= 9950 order by c desc limit 1", "explain format = 'brief' select * from t where b >= 8999 order by c limit 1", "explain format = 'brief' select * from t where b >= 9000 order by c limit 1", "explain format = 'brief' select * from t where b >= 9001 order by c limit 1", "explain format = 'brief' select * from t where a < 10001 order by c limit 1", "explain format = 'brief' select * from t where a < 10000 order by c limit 1", "explain format = 'brief' select * from t where a < 9999 order by c limit 1", "explain format = 'brief' select * from t where b >= 0 and b <= 50 or c >= 0 and c <= 50 order by c limit 1", "explain format = 'brief' select * from t where b >= 9950 and c >= 9950 order by c limit 1", "explain format = 'brief' select * from t where b >= 9950 and c >= 9900 order by c limit 1", "explain format = 'brief' select * from t where a < 1000 and c < 100 limit 1", "explain format = 'brief' select * from t where d >= 9950 order by c limit 1", "explain format = 'brief' select * from t where d < 9950 order by c limit 1", "set @@tidb_opt_ordering_index_selectivity_threshold = 1", "explain format = 'brief' select * from t where d >= 9950 order by c limit 1", "explain format = 'brief' select * from t where d < 9950 order by c limit 1" ] }, { "name": "TestOrderingIdxSelectivityRatio", "cases": [ "set @@tidb_opt_ordering_index_selectivity_threshold = 0", "set @@tidb_opt_ordering_index_selectivity_ratio = -1", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 1", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 10", "explain format = 'brief' select * from t where a < 500 and c < 100 limit 1", "set @@tidb_opt_ordering_index_selectivity_ratio = 0", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 1", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 10", "explain format = 'brief' select * from t where a < 500 and c < 100 limit 1", "set @@tidb_opt_ordering_index_selectivity_ratio = 0.1", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 1", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 10", "explain format = 'brief' select * from t where a < 500 and c < 100 limit 1", "set @@tidb_opt_ordering_index_selectivity_ratio = 0.5", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 1", "explain format = 'brief' select * from t use index (ic) where b >= 900 order by c limit 10", "explain format = 'brief' select * from t where a < 500 and c < 100 limit 1" ] }, { "name": "TestTraceCE", "cases": [ "a > 0 and a < 2", "a >= 1 and a < 10", "a < 3 or b < 4", "a = 1 and b = 2", "a < 5 or a > 10" ] }, { "name": "TestTraceDebugSelectivity", "cases": [ "select * from t where a = 100 and b = 350", "select * from t where a < -1500 and b > 400 and b < 403" ] }, { "name": "TestIndexJoinInnerRowCountUpperBound", "cases": [ "explain format = 'brief' select /*+ inl_join(t2) */ * from (select * from t where t.a < 1) as t1 join t t2 where t2.a = 0 and t1.a = t2.b", "set @@tidb_opt_fix_control = '44855:ON'", "explain format = 'brief' select /*+ inl_join(t2) */ * from (select * from t where t.a < 1) as t1 join t t2 where t2.a = 0 and t1.a = t2.b" ] }, { "name": "TestSubsetIdxCardinality", "cases": [ "explain format = 'brief' select distinct a from t", "explain format = 'brief' select distinct b from t", "explain format = 'brief' select distinct a, b, c from t", "explain format = 'brief' select a, b from t where a = 1 and b = 1 and c = 1", "explain format = 'brief' select a, b from t where a = 1 and b = 1" ] } ]