85 lines
3.4 KiB
JSON
85 lines
3.4 KiB
JSON
[
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{
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"name": "TestPushLimitDownIndexLookUpReader",
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"cases": [
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// Limit should be pushed down into IndexLookUpReader, row count of IndexLookUpReader and TableScan should be 1.00.
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"explain select * from tbl use index(idx_b_c) where b > 1 limit 2,1",
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// Projection atop IndexLookUpReader, Limit should be pushed down into IndexLookUpReader, and Projection should have row count 1.00 as well.
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"explain select * from tbl use index(idx_b_c) where b > 1 order by b desc limit 2,1",
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// Limit should be pushed down into IndexLookUpReader when Selection on top of IndexScan.
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"explain select * from tbl use index(idx_b_c) where b > 1 and c > 1 limit 2,1",
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// Limit should NOT be pushed down into IndexLookUpReader when Selection on top of TableScan.
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"explain select * from tbl use index(idx_b_c) where b > 1 and a > 1 limit 2,1"
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]
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},
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{
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"name": "TestIsFromUnixtimeNullRejective",
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"cases": [
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// fix #12385
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"explain select * from t t1 left join t t2 on t1.a=t2.a where from_unixtime(t2.b);"
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]
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},
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{
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"name": "TestSimplifyOuterJoinWithCast",
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"cases": [
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// LeftOuterJoin should no be simplified to InnerJoin.
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"explain select * from t t1 left join t t2 on t1.a = t2.a where cast(t1.b as date) >= '2019-01-01'"
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]
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},
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{
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"name": "TestMaxMinEliminate",
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"cases": [
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"explain (select max(a) from t) union (select min(a) from t)"
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]
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},
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{
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"name": "TestIndexJoinUniqueCompositeIndex",
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"cases": [
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// Row count of IndexScan should be 2.
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"explain select /*+ TIDB_INLJ(t2) */ * from t1 join t2 on t1.a = t2.a and t1.c = t2.c",
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// Row count of IndexScan should be 2.
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"explain select /*+ TIDB_INLJ(t2) */ * from t1 join t2 on t1.a = t2.a and t1.c <= t2.b",
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// Row count of IndexScan should be 1.
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"explain select /*+ TIDB_INLJ(t2) */ * from t1 join t2 on t1.a = t2.a and t2.b = 1"
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]
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},
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{
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"name": "TestPartitionTableStats",
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"cases": [
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"explain select * from t order by a",
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"select * from t order by a",
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"explain select * from t order by a limit 3",
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"select * from t order by a limit 3"
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]
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},
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{
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"name": "TestIndexMerge",
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"cases": [
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"explain select /*+ USE_INDEX_MERGE(t, a, b) */ * from t where a = 1 or b = 2"
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]
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},
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{
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"name": "TestReadFromStorageHint",
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"cases": [
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"desc select avg(a) from t",
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"desc select /*+ read_from_storage(tiflash[t]) */ avg(a) from t",
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"desc select /*+ read_from_storage(tiflash[t]) */ sum(a) from t",
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"desc select /*+ read_from_storage(tiflash[t]) */ sum(a+1) from t",
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"desc select /*+ read_from_storage(tiflash[t]) */ sum(isnull(a)) from t",
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"desc select * from tt where (tt.a > 1 and tt.a < 20) or (tt.a >= 30 and tt.a < 55)",
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"desc select /*+ read_from_storage(tiflash[tt]) */ * from tt where (tt.a > 1 and tt.a < 20) or (tt.a >= 30 and tt.a < 55)",
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"desc select * from ttt order by ttt.a desc",
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"desc select /*+ read_from_storage(tiflash[ttt]) */ * from ttt order by ttt.a desc",
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"desc select /*+ read_from_storage(tiflash[ttt]) */ * from ttt order by ttt.a"
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]
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},
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{
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"name": "TestReadFromStorageHintAndIsolationRead",
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"cases": [
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"desc select /*+ read_from_storage(tikv[t], tiflash[t]) */ avg(a) from t",
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"desc select /*+ read_from_storage(tikv[t]) */ avg(a) from t",
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"desc select /*+ read_from_storage(tiflash[t]) */ avg(a) from t"
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]
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}
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]
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