[
  {
    "name": "TestUniqCompEqualEst",
    "cases": [
      "explain select * from t where a = 1 and b = 5 and 1 = 1"
    ]
  },
  {
    "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": "TestDiscreteDistribution",
    "cases": [
      "explain select * from t where a = 'tw' and b < 0"
    ]
  },
  {
    "name": "TestPrimaryKeySelectivity",
    "cases": [
      [
        "explain select * from t where a > \"t\""
      ],
      [
        "drop table t",
        "create table t(a int primary key, b int)",
        "explain select * from t where a > 1"
      ]
    ]
  },
  {
    "name": "TestSelectCombinedLowBound",
    "cases": [
      "explain select * from t where kid = 1"
    ]
  },
  {
    "name": "TestCollationColumnEstimate",
    "cases": [
      "show stats_buckets",
      "explain select * from t where a='aÄa'",
      "explain select * from t where a > 'aÄa'"
    ]
  }
]