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stats: do not split excluded lower value ranges (#12009) (#12170)
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@alivxxx @sre-bot
alivxxx authored and sre-bot committed Sep 16, 2019
1 parent 2a33209 commit 1d489fb
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Showing 6 changed files with 128 additions and 120 deletions.
14 changes: 10 additions & 4 deletions statistics/feedback.go
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Original file line number Diff line number Diff line change
Expand Up @@ -314,15 +314,21 @@ func buildBucketFeedback(h *Histogram, feedback *QueryFeedback) (map[int]*Bucket
if skip {
continue
}
idx, _ := h.Bounds.LowerBound(0, fb.Lower)
idx := h.Bounds.UpperBound(0, fb.Lower)
bktIdx := 0
// The last bucket also stores the feedback that falls outside the upper bound.
if idx >= h.Bounds.NumRows()-2 {
if idx >= h.Bounds.NumRows()-1 {
bktIdx = h.Len() - 1
} else if h.Len() == 1 {
bktIdx = 0
} else {
bktIdx = idx / 2
if idx == 0 {
bktIdx = 0
} else {
bktIdx = (idx - 1) / 2
}
// Make sure that this feedback lies within the bucket.
if chunk.Compare(h.Bounds.GetRow(2*bktIdx+1), 0, fb.Upper) < 0 {
if chunk.Compare(h.Bounds.GetRow(2*(bktIdx+1)), 0, fb.Upper) < 0 {
continue
}
}
Expand Down
15 changes: 7 additions & 8 deletions statistics/feedback_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -70,14 +70,13 @@ func (s *testFeedbackSuite) TestUpdateHistogram(c *C) {
defaultBucketCount = 7
defer func() { defaultBucketCount = originBucketCount }()
c.Assert(UpdateHistogram(q.Hist, q).ToString(0), Equals,
"column:0 ndv:10058 totColSize:0\n"+
"num: 10000 lower_bound: 0 upper_bound: 1 repeats: 0\n"+
"num: 9 lower_bound: 2 upper_bound: 7 repeats: 0\n"+
"num: 11 lower_bound: 8 upper_bound: 19 repeats: 0\n"+
"num: 0 lower_bound: 20 upper_bound: 20 repeats: 0\n"+
"num: 18 lower_bound: 21 upper_bound: 39 repeats: 0\n"+
"num: 18 lower_bound: 40 upper_bound: 58 repeats: 0\n"+
"num: 2 lower_bound: 59 upper_bound: 60 repeats: 0")
"column:0 ndv:10053 totColSize:0\n"+
"num: 10001 lower_bound: 0 upper_bound: 2 repeats: 0\n"+
"num: 7 lower_bound: 2 upper_bound: 5 repeats: 0\n"+
"num: 4 lower_bound: 5 upper_bound: 7 repeats: 0\n"+
"num: 11 lower_bound: 10 upper_bound: 20 repeats: 0\n"+
"num: 19 lower_bound: 30 upper_bound: 49 repeats: 0\n"+
"num: 11 lower_bound: 50 upper_bound: 60 repeats: 0")
}

func (s *testFeedbackSuite) TestSplitBuckets(c *C) {
Expand Down
6 changes: 3 additions & 3 deletions statistics/handle/update.go
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Original file line number Diff line number Diff line change
Expand Up @@ -778,11 +778,11 @@ func formatBuckets(hg *statistics.Histogram, lowBkt, highBkt, idxCols int) strin
return hg.BucketToString(lowBkt, idxCols)
}
if lowBkt+1 == highBkt {
return fmt.Sprintf("%s, %s", hg.BucketToString(lowBkt, 0), hg.BucketToString(highBkt, 0))
return fmt.Sprintf("%s, %s", hg.BucketToString(lowBkt, idxCols), hg.BucketToString(highBkt, idxCols))
}
// do not care the middle buckets
return fmt.Sprintf("%s, (%d buckets, total count %d), %s", hg.BucketToString(lowBkt, 0),
highBkt-lowBkt-1, hg.Buckets[highBkt-1].Count-hg.Buckets[lowBkt].Count, hg.BucketToString(highBkt, 0))
return fmt.Sprintf("%s, (%d buckets, total count %d), %s", hg.BucketToString(lowBkt, idxCols),
highBkt-lowBkt-1, hg.Buckets[highBkt-1].Count-hg.Buckets[lowBkt].Count, hg.BucketToString(highBkt, idxCols))
}

func colRangeToStr(c *statistics.Column, ran *ranger.Range, actual int64, factor float64) string {
Expand Down
144 changes: 72 additions & 72 deletions statistics/handle/update_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -684,18 +684,18 @@ func (s *testStatsSuite) TestSplitRange(c *C) {
{
points: []int64{0, 1, 3, 8, 8, 20},
exclude: []bool{true, false, true, false, true, false},
result: "(0,1],(3,5],(5,7],(7,8],(8,20]",
result: "(0,1],(3,7),[7,8),[8,8],(8,10),[10,20]",
},
{
points: []int64{8, 10, 20, 30},
exclude: []bool{false, false, true, true},
result: "[8,8],(8,10],(20,30)",
result: "[8,10),[10,10],(20,30)",
},
{
// test remove invalid range
points: []int64{8, 9},
exclude: []bool{false, true},
result: "[8,8]",
result: "[8,9)",
},
}
for _, t := range tests {
Expand Down Expand Up @@ -743,25 +743,25 @@ func (s *testStatsSuite) TestQueryFeedback(c *C) {
// test primary key feedback
sql: "select * from t where t.a <= 5",
hist: "column:1 ndv:4 totColSize:0\n" +
"num: 1 lower_bound: -9223372036854775808 upper_bound: 1 repeats: 0\n" +
"num: 1 lower_bound: 2 upper_bound: 2 repeats: 1\n" +
"num: 2 lower_bound: 3 upper_bound: 5 repeats: 0",
"num: 1 lower_bound: -9223372036854775808 upper_bound: 2 repeats: 0\n" +
"num: 2 lower_bound: 2 upper_bound: 4 repeats: 0\n" +
"num: 1 lower_bound: 4 upper_bound: 4 repeats: 1",
idxCols: 0,
},
{
// test index feedback by double read
sql: "select * from t use index(idx) where t.b <= 5",
hist: "index:1 ndv:2\n" +
"num: 2 lower_bound: -inf upper_bound: 2 repeats: 0\n" +
"num: 2 lower_bound: 3 upper_bound: 6 repeats: 0",
"num: 3 lower_bound: -inf upper_bound: 5 repeats: 0\n" +
"num: 1 lower_bound: 5 upper_bound: 5 repeats: 1",
idxCols: 1,
},
{
// test index feedback by single read
sql: "select b from t use index(idx) where t.b <= 5",
hist: "index:1 ndv:2\n" +
"num: 2 lower_bound: -inf upper_bound: 2 repeats: 0\n" +
"num: 2 lower_bound: 3 upper_bound: 6 repeats: 0",
"num: 3 lower_bound: -inf upper_bound: 5 repeats: 0\n" +
"num: 1 lower_bound: 5 upper_bound: 5 repeats: 1",
idxCols: 1,
},
}
Expand Down Expand Up @@ -855,7 +855,7 @@ func (s *testStatsSuite) TestQueryFeedbackForPartition(c *C) {
// test primary key feedback
sql: "select * from t where t.a <= 5",
hist: "column:1 ndv:2 totColSize:0\n" +
"num: 1 lower_bound: -9223372036854775808 upper_bound: 1 repeats: 0\n" +
"num: 1 lower_bound: -9223372036854775808 upper_bound: 2 repeats: 0\n" +
"num: 1 lower_bound: 2 upper_bound: 5 repeats: 0",
idxCols: 0,
},
Expand Down Expand Up @@ -987,17 +987,17 @@ func (s *testStatsSuite) TestUpdateStatsByLocalFeedback(c *C) {

c.Assert(tbl.Columns[tblInfo.Columns[0].ID].ToString(0), Equals, "column:1 ndv:3 totColSize:0\n"+
"num: 1 lower_bound: 1 upper_bound: 1 repeats: 1\n"+
"num: 1 lower_bound: 2 upper_bound: 2 repeats: 1\n"+
"num: 2 lower_bound: 3 upper_bound: 9223372036854775807 repeats: 0")
"num: 2 lower_bound: 2 upper_bound: 4 repeats: 0\n"+
"num: 1 lower_bound: 4 upper_bound: 9223372036854775807 repeats: 0")
sc := &stmtctx.StatementContext{TimeZone: time.Local}
low, err := codec.EncodeKey(sc, nil, types.NewIntDatum(5))
c.Assert(err, IsNil)

c.Assert(tbl.Indices[tblInfo.Indices[0].ID].CMSketch.QueryBytes(low), Equals, uint64(2))

c.Assert(tbl.Indices[tblInfo.Indices[0].ID].ToString(1), Equals, "index:1 ndv:2\n"+
"num: 2 lower_bound: -inf upper_bound: 2 repeats: 0\n"+
"num: 2 lower_bound: 3 upper_bound: 6 repeats: 0")
"num: 2 lower_bound: -inf upper_bound: 5 repeats: 0\n"+
"num: 1 lower_bound: 5 upper_bound: 5 repeats: 1")

// Test that it won't cause panic after update.
testKit.MustQuery("select * from t use index(idx) where b > 0")
Expand Down Expand Up @@ -1038,8 +1038,8 @@ func (s *testStatsSuite) TestUpdatePartitionStatsByLocalFeedback(c *C) {

c.Assert(tbl.Columns[tblInfo.Columns[0].ID].ToString(0), Equals, "column:1 ndv:3 totColSize:0\n"+
"num: 1 lower_bound: 1 upper_bound: 1 repeats: 1\n"+
"num: 1 lower_bound: 2 upper_bound: 2 repeats: 1\n"+
"num: 2 lower_bound: 3 upper_bound: 9223372036854775807 repeats: 0")
"num: 2 lower_bound: 2 upper_bound: 4 repeats: 0\n"+
"num: 1 lower_bound: 4 upper_bound: 9223372036854775807 repeats: 0")
}

type logHook struct {
Expand Down Expand Up @@ -1112,13 +1112,13 @@ func (s *testStatsSuite) TestLogDetailedInfo(c *C) {
}{
{
sql: "select * from t where t.a <= 15",
result: "[stats-feedback] test.t, column=a, rangeStr=range: [-inf,7), actual: 8, expected: 7, buckets: {num: 8 lower_bound: 0 upper_bound: 7 repeats: 1}" +
result: "[stats-feedback] test.t, column=a, rangeStr=range: [-inf,8), actual: 8, expected: 8, buckets: {num: 8 lower_bound: 0 upper_bound: 7 repeats: 1, num: 8 lower_bound: 8 upper_bound: 15 repeats: 1}" +
"[stats-feedback] test.t, column=a, rangeStr=range: [8,15), actual: 8, expected: 7, buckets: {num: 8 lower_bound: 8 upper_bound: 15 repeats: 1}",
},
{
sql: "select * from t use index(idx) where t.b <= 15",
result: "[stats-feedback] test.t, index=idx, rangeStr=range: [-inf,7), actual: 8, expected: 7, histogram: {num: 8 lower_bound: 0 upper_bound: 7 repeats: 1}" +
"[stats-feedback] test.t, index=idx, rangeStr=range: [8,15), actual: 8, expected: 7, histogram: {num: 8 lower_bound: 8 upper_bound: 15 repeats: 1}",
result: "[stats-feedback] test.t, index=idx, rangeStr=range: [-inf,8), actual: 8, expected: 8, histogram: {num: 8 lower_bound: 0 upper_bound: 7 repeats: 1, num: 8 lower_bound: 8 upper_bound: 15 repeats: 1}" +
"[stats-feedback] test.t, index=idx, rangeStr=range: [8,16), actual: 8, expected: 8, histogram: {num: 8 lower_bound: 8 upper_bound: 15 repeats: 1, num: 4 lower_bound: 16 upper_bound: 19 repeats: 1}",
},
{
sql: "select b from t use index(idx_ba) where b = 1 and a <= 5",
Expand Down Expand Up @@ -1297,8 +1297,8 @@ func (s *testStatsSuite) TestIndexQueryFeedback(c *C) {
{
sql: "select * from t use index(idx_ab) where a = 1 and b < 21",
hist: "index:1 ndv:20\n" +
"num: 16 lower_bound: -inf upper_bound: 7 repeats: 0\n" +
"num: 16 lower_bound: 8 upper_bound: 15 repeats: 0\n" +
"num: 15 lower_bound: -inf upper_bound: 8 repeats: 0\n" +
"num: 15 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 8 lower_bound: 16 upper_bound: 21 repeats: 0",
rangeID: tblInfo.Indices[0].ID,
idxID: tblInfo.Indices[1].ID,
Expand All @@ -1308,9 +1308,9 @@ func (s *testStatsSuite) TestIndexQueryFeedback(c *C) {
{
sql: "select * from t use index(idx_ac) where a = 1 and c < 21",
hist: "column:3 ndv:20 totColSize:20\n" +
"num: 13 lower_bound: -9223372036854775808 upper_bound: 6 repeats: 0\n" +
"num: 13 lower_bound: 7 upper_bound: 13 repeats: 0\n" +
"num: 12 lower_bound: 14 upper_bound: 21 repeats: 0",
"num: 15 lower_bound: -9223372036854775808 upper_bound: 7 repeats: 0\n" +
"num: 14 lower_bound: 7 upper_bound: 14 repeats: 0\n" +
"num: 13 lower_bound: 14 upper_bound: 21 repeats: 0",
rangeID: tblInfo.Columns[2].ID,
idxID: tblInfo.Indices[2].ID,
idxCols: 0,
Expand All @@ -1319,57 +1319,57 @@ func (s *testStatsSuite) TestIndexQueryFeedback(c *C) {
{
sql: "select * from t use index(idx_ad) where a = 1 and d < 21",
hist: "column:4 ndv:20 totColSize:160\n" +
"num: 13 lower_bound: -10000000000000 upper_bound: 6 repeats: 0\n" +
"num: 12 lower_bound: 7 upper_bound: 13 repeats: 0\n" +
"num: 10 lower_bound: 14 upper_bound: 21 repeats: 0",
"num: 15 lower_bound: -10000000000000 upper_bound: 7 repeats: 0\n" +
"num: 14 lower_bound: 7 upper_bound: 14 repeats: 0\n" +
"num: 13 lower_bound: 14 upper_bound: 21 repeats: 0",
rangeID: tblInfo.Columns[3].ID,
idxID: tblInfo.Indices[3].ID,
idxCols: 0,
eqCount: 32,
eqCount: 35,
},
{
sql: "select * from t use index(idx_ae) where a = 1 and e < 21",
hist: "column:5 ndv:20 totColSize:160\n" +
"num: 13 lower_bound: -100000000000000000000000 upper_bound: 6 repeats: 0\n" +
"num: 12 lower_bound: 7 upper_bound: 13 repeats: 0\n" +
"num: 10 lower_bound: 14 upper_bound: 21 repeats: 0",
"num: 15 lower_bound: -100000000000000000000000 upper_bound: 7 repeats: 0\n" +
"num: 14 lower_bound: 7 upper_bound: 14 repeats: 0\n" +
"num: 13 lower_bound: 14 upper_bound: 21 repeats: 0",
rangeID: tblInfo.Columns[4].ID,
idxID: tblInfo.Indices[4].ID,
idxCols: 0,
eqCount: 32,
eqCount: 35,
},
{
sql: "select * from t use index(idx_af) where a = 1 and f < 21",
hist: "column:6 ndv:20 totColSize:200\n" +
"num: 13 lower_bound: -999999999999999.99 upper_bound: 6.00 repeats: 0\n" +
"num: 12 lower_bound: 7.00 upper_bound: 13.00 repeats: 0\n" +
"num: 10 lower_bound: 14.00 upper_bound: 21.00 repeats: 0",
"num: 15 lower_bound: -999999999999999.99 upper_bound: 7.00 repeats: 0\n" +
"num: 14 lower_bound: 7.00 upper_bound: 14.00 repeats: 0\n" +
"num: 13 lower_bound: 14.00 upper_bound: 21.00 repeats: 0",
rangeID: tblInfo.Columns[5].ID,
idxID: tblInfo.Indices[5].ID,
idxCols: 0,
eqCount: 32,
eqCount: 35,
},
{
sql: "select * from t use index(idx_ag) where a = 1 and g < 21",
hist: "column:7 ndv:20 totColSize:98\n" +
"num: 13 lower_bound: -838:59:59 upper_bound: 00:00:06 repeats: 0\n" +
"num: 12 lower_bound: 00:00:07 upper_bound: 00:00:13 repeats: 0\n" +
"num: 10 lower_bound: 00:00:14 upper_bound: 00:00:21 repeats: 0",
"num: 15 lower_bound: -838:59:59 upper_bound: 00:00:07 repeats: 0\n" +
"num: 14 lower_bound: 00:00:07 upper_bound: 00:00:14 repeats: 0\n" +
"num: 13 lower_bound: 00:00:14 upper_bound: 00:00:21 repeats: 0",
rangeID: tblInfo.Columns[6].ID,
idxID: tblInfo.Indices[6].ID,
idxCols: 0,
eqCount: 32,
eqCount: 35,
},
{
sql: `select * from t use index(idx_ah) where a = 1 and h < "1000-01-21"`,
hist: "column:8 ndv:20 totColSize:180\n" +
"num: 13 lower_bound: 1000-01-01 upper_bound: 1000-01-07 repeats: 0\n" +
"num: 12 lower_bound: 1000-01-08 upper_bound: 1000-01-14 repeats: 0\n" +
"num: 10 lower_bound: 1000-01-15 upper_bound: 1000-01-21 repeats: 0",
"num: 15 lower_bound: 1000-01-01 upper_bound: 1000-01-08 repeats: 0\n" +
"num: 14 lower_bound: 1000-01-08 upper_bound: 1000-01-15 repeats: 0\n" +
"num: 13 lower_bound: 1000-01-15 upper_bound: 1000-01-21 repeats: 0",
rangeID: tblInfo.Columns[7].ID,
idxID: tblInfo.Indices[7].ID,
idxCols: 0,
eqCount: 32,
eqCount: 35,
},
}
for i, t := range tests {
Expand Down Expand Up @@ -1465,9 +1465,9 @@ func (s *testStatsSuite) TestAbnormalIndexFeedback(c *C) {
// The real count of `a = 1` is 0.
sql: "select * from t where a = 1 and b < 21",
hist: "column:2 ndv:20 totColSize:20\n" +
"num: 4 lower_bound: -9223372036854775808 upper_bound: 6 repeats: 0\n" +
"num: 3 lower_bound: 7 upper_bound: 13 repeats: 0\n" +
"num: 6 lower_bound: 14 upper_bound: 19 repeats: 1",
"num: 5 lower_bound: -9223372036854775808 upper_bound: 7 repeats: 0\n" +
"num: 4 lower_bound: 7 upper_bound: 14 repeats: 0\n" +
"num: 4 lower_bound: 14 upper_bound: 21 repeats: 0",
rangeID: tblInfo.Columns[1].ID,
idxID: tblInfo.Indices[0].ID,
eqCount: 3,
Expand All @@ -1476,9 +1476,9 @@ func (s *testStatsSuite) TestAbnormalIndexFeedback(c *C) {
// The real count of `b > 10` is 0.
sql: "select * from t where a = 2 and b > 10",
hist: "column:2 ndv:20 totColSize:20\n" +
"num: 4 lower_bound: -9223372036854775808 upper_bound: 6 repeats: 0\n" +
"num: 2 lower_bound: 7 upper_bound: 13 repeats: 0\n" +
"num: 6 lower_bound: 14 upper_bound: 19 repeats: 1",
"num: 5 lower_bound: -9223372036854775808 upper_bound: 7 repeats: 0\n" +
"num: 6 lower_bound: 7 upper_bound: 14 repeats: 0\n" +
"num: 7 lower_bound: 14 upper_bound: 9223372036854775807 repeats: 0",
rangeID: tblInfo.Columns[1].ID,
idxID: tblInfo.Indices[0].ID,
eqCount: 3,
Expand Down Expand Up @@ -1528,27 +1528,27 @@ func (s *testStatsSuite) TestFeedbackRanges(c *C) {
colID int64
}{
{
sql: "select * from t where a <= 50 or (a > 130 and a < 140)",
hist: "column:1 ndv:20 totColSize:0\n" +
"num: 8 lower_bound: 0 upper_bound: 7 repeats: 1\n" +
"num: 8 lower_bound: 8 upper_bound: 15 repeats: 1\n" +
"num: 4 lower_bound: 16 upper_bound: 19 repeats: 1",
sql: "select * from t use index() where a <= 50 or (a > 130 and a < 140)",
hist: "column:1 ndv:30 totColSize:0\n" +
"num: 8 lower_bound: -128 upper_bound: 8 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 14 lower_bound: 16 upper_bound: 50 repeats: 0",
colID: 1,
},
{
sql: "select * from t where a >= 10",
hist: "column:1 ndv:20 totColSize:0\n" +
"num: 8 lower_bound: 0 upper_bound: 7 repeats: 1\n" +
"num: 8 lower_bound: 8 upper_bound: 15 repeats: 1\n" +
"num: 4 lower_bound: 16 upper_bound: 19 repeats: 1",
sql: "select * from t use index() where a >= 10",
hist: "column:1 ndv:30 totColSize:0\n" +
"num: 8 lower_bound: -128 upper_bound: 8 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 14 lower_bound: 16 upper_bound: 127 repeats: 0",
colID: 1,
},
{
sql: "select * from t use index(idx) where a = 1 and (b <= 50 or (b > 130 and b < 140))",
hist: "column:2 ndv:20 totColSize:20\n" +
"num: 9 lower_bound: -128 upper_bound: 6 repeats: 0\n" +
"num: 7 lower_bound: 7 upper_bound: 13 repeats: 1\n" +
"num: 6 lower_bound: 14 upper_bound: 19 repeats: 1",
"num: 8 lower_bound: -128 upper_bound: 7 repeats: 0\n" +
"num: 8 lower_bound: 7 upper_bound: 14 repeats: 0\n" +
"num: 7 lower_bound: 14 upper_bound: 51 repeats: 0",
colID: 2,
},
}
Expand Down Expand Up @@ -1603,32 +1603,32 @@ func (s *testStatsSuite) TestUnsignedFeedbackRanges(c *C) {
{
sql: "select * from t where a <= 50",
hist: "column:1 ndv:30 totColSize:0\n" +
"num: 8 lower_bound: 0 upper_bound: 7 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 15 repeats: 0\n" +
"num: 8 lower_bound: 0 upper_bound: 8 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 14 lower_bound: 16 upper_bound: 50 repeats: 0",
tblName: "t",
},
{
sql: "select count(*) from t",
hist: "column:1 ndv:30 totColSize:0\n" +
"num: 8 lower_bound: 0 upper_bound: 7 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 15 repeats: 0\n" +
"num: 8 lower_bound: 0 upper_bound: 8 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 14 lower_bound: 16 upper_bound: 255 repeats: 0",
tblName: "t",
},
{
sql: "select * from t1 where a <= 50",
hist: "column:1 ndv:30 totColSize:0\n" +
"num: 8 lower_bound: 0 upper_bound: 7 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 15 repeats: 0\n" +
"num: 8 lower_bound: 0 upper_bound: 8 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 14 lower_bound: 16 upper_bound: 50 repeats: 0",
tblName: "t1",
},
{
sql: "select count(*) from t1",
hist: "column:1 ndv:30 totColSize:0\n" +
"num: 8 lower_bound: 0 upper_bound: 7 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 15 repeats: 0\n" +
"num: 8 lower_bound: 0 upper_bound: 8 repeats: 0\n" +
"num: 8 lower_bound: 8 upper_bound: 16 repeats: 0\n" +
"num: 14 lower_bound: 16 upper_bound: 18446744073709551615 repeats: 0",
tblName: "t1",
},
Expand Down
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