[
  {
    "Name": "TestExpBackoffEstimation",
    "Cases": [
      [
        "IndexReader_6 5.00 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 5.00 cop[tikv] table:exp_backoff, index:idx(a, b, c, d) range:[1,1], keep order:false"
      ],
      [
        "IndexReader_10 3.00 root  index:Selection_9",
        "└─Selection_9 3.00 cop[tikv]  eq(test.exp_backoff.b, 1)",
        "  └─IndexFullScan_8 5.00 cop[tikv] table:exp_backoff, index:idx(a, b, c, d) keep order:false"
      ],
      [
        "IndexReader_10 2.00 root  index:Selection_9",
        "└─Selection_9 2.00 cop[tikv]  eq(test.exp_backoff.c, 1)",
        "  └─IndexFullScan_8 5.00 cop[tikv] table:exp_backoff, index:idx(a, b, c, d) keep order:false"
      ],
      [
        "IndexReader_10 3.00 root  index:Selection_9",
        "└─Selection_9 3.00 cop[tikv]  ge(test.exp_backoff.d, 3), le(test.exp_backoff.d, 5)",
        "  └─IndexFullScan_8 5.00 cop[tikv] table:exp_backoff, index:idx(a, b, c, d) keep order:false"
      ],
      [
        "IndexReader_6 1.36 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 1.36 cop[tikv] table:exp_backoff, index:idx(a, b, c, d) range:[1 1 1 3,1 1 1 5], keep order:false"
      ],
      [
        "IndexReader_6 1.00 root  index:IndexRangeScan_5",
        "└─IndexRangeScan_5 1.00 cop[tikv] table:exp_backoff, index:idx(a, b, c, d) range:[1 1 1 3,1 1 1 5], keep order:false"
      ]
    ]
  },
  {
    "Name": "TestNULLOnFullSampling",
    "Cases": [
      [
        "test t  a 0 1 3",
        "test t  a 0 2 2",
        "test t  idx 1 1 3",
        "test t  idx 1 2 2"
      ],
      [
        "test t  a 0 0 1 1 3 3 0",
        "test t  a 0 1 2 1 4 4 0",
        "test t  idx 1 0 1 1 3 3 0",
        "test t  idx 1 1 2 1 4 4 0"
      ]
    ]
  }
]