[
  {
    "name": "TestClusteredPrefixColumn",
    "cases": [
      "select c2 from t1 use index(idx1)",
      "select count(1) from t1 use index(idx1) where c2 = 'cd'",
      "select c2 from t2 use index(idx1)",
      "select count(1) from t2 use index(idx1) where c2 = 'cd'"
    ]
  }
]