[
  {
    "Name": "TestUniqCompEqualEst",
    "Cases": [
      [
        "Point_Get_5 1.00 root table:t, index:PRIMARY(a, b) "
      ]
    ]
  },
  {
    "Name": "TestColumnIndexNullEstimation",
    "Cases": [
      [
        "IndexReader_6 4.00 root  index:IndexFullScan_5",
        "└─IndexFullScan_5 4.00 cop[tikv] table:t, index:idx_b(b) keep order:false"
      ],
      [
        "IndexReader_6 1.00 root  index:IndexFullScan_5",
        "└─IndexFullScan_5 1.00 cop[tikv] table:t, index:idx_b(b) keep order:false"
      ],
      [
        "IndexReader_6 4.00 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 4.00 cop[tikv] table:t, index:idx_b(b) range:[NULL,NULL], (3,+inf], keep order:false"
      ],
      [
        "IndexReader_5 5.00 root  index:IndexFullScan_4",
        "└─IndexFullScan_4 5.00 cop[tikv] table:t, index:idx_b(b) keep order:false"
      ],
      [
        "IndexReader_6 1.00 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 1.00 cop[tikv] table:t, index:idx_b(b) range:[-inf,4), keep order:false"
      ],
      [
        "TableReader_7 1.00 root  data:Selection_6",
        "└─Selection_6 1.00 cop[tikv]  isnull(test.t.a)",
        "  └─TableFullScan_5 5.00 cop[tikv] table:t keep order:false"
      ],
      [
        "TableReader_7 4.00 root  data:Selection_6",
        "└─Selection_6 4.00 cop[tikv]  not(isnull(test.t.a))",
        "  └─TableFullScan_5 5.00 cop[tikv] table:t keep order:false"
      ],
      [
        "TableReader_7 2.00 root  data:Selection_6",
        "└─Selection_6 2.00 cop[tikv]  or(isnull(test.t.a), gt(test.t.a, 3))",
        "  └─TableFullScan_5 5.00 cop[tikv] table:t keep order:false"
      ],
      [
        "TableReader_5 5.00 root  data:TableFullScan_4",
        "└─TableFullScan_4 5.00 cop[tikv] table:t keep order:false"
      ],
      [
        "TableReader_7 3.00 root  data:Selection_6",
        "└─Selection_6 3.00 cop[tikv]  lt(test.t.a, 4)",
        "  └─TableFullScan_5 5.00 cop[tikv] table:t keep order:false"
      ]
    ]
  },
  {
    "Name": "TestDiscreteDistribution",
    "Cases": [
      [
        "IndexReader_6 0.00 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 0.00 cop[tikv] table:t, index:idx(a, b) range:[\"tw\" -inf,\"tw\" 0), keep order:false"
      ]
    ]
  },
  {
    "Name": "TestPrimaryKeySelectivity",
    "Cases": [
      [
        "TableReader_7 3333.33 root  data:Selection_6",
        "└─Selection_6 3333.33 cop[tikv]  gt(test.t.a, \"t\")",
        "  └─TableFullScan_5 10000.00 cop[tikv] table:t keep order:false, stats:pseudo"
      ],
      [
        "TableReader_6 3333.33 root  data:TableRangeScan_5",
        "└─TableRangeScan_5 3333.33 cop[tikv] table:t range:(1,+inf], keep order:false, stats:pseudo"
      ]
    ]
  },
  {
    "Name": "TestSelectCombinedLowBound",
    "Cases": [
      [
        "IndexReader_6 7.00 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 7.00 cop[tikv] table:t, index:kid(kid, pid) range:[1,1], keep order:false"
      ]
    ]
  },
  {
    "Name": "TestCollationColumnEstimate",
    "Cases": [
      [
        "test t  a 0 0 2 2 \u0000A\u0000A\u0000A \u0000A\u0000A\u0000A",
        "test t  a 0 1 4 2 \u0000B\u0000B\u0000B \u0000B\u0000B\u0000B"
      ],
      [
        "TableReader_7 2.00 root  data:Selection_6",
        "└─Selection_6 2.00 cop[tikv]  eq(test.t.a, \"aÄa\")",
        "  └─TableFullScan_5 4.00 cop[tikv] table:t keep order:false"
      ],
      [
        "TableReader_7 2.00 root  data:Selection_6",
        "└─Selection_6 2.00 cop[tikv]  gt(test.t.a, \"aÄa\")",
        "  └─TableFullScan_5 4.00 cop[tikv] table:t keep order:false"
      ]
    ]
  }
]