Apache Druid sql查询转换为基于json的查询

我正在尝试将下面的druid sql查询转换为druid json查询,因为我的一列是一个多值维度,druid不支持sql样式的查询。

我的sql查询:

SELECT date_dt, source, type_labels, COUNT(DISTINCT unique_p_hll)
  FROM "test"
WHERE 
  type_labels = 'z' AND
  (a_id IN ('a', 'b', 'c') OR b_id IN ('m', 'n', 'p'))
GROUP BY date_dt, source, type_labels;

unique_p_hll 是带有uniques的hll列。

我提出的druid json查询如下:

{
  "queryType": "groupBy",
  "dataSource": "test",
  "granularity": "day",
  "dimensions": ["source", "type_labels"],
  "limitSpec": {},
  "filter": {
    "type": "and",
    "fields": [
      { "type": "selector", "dimension": "type_labels", "value": "z" },   
      { "type": "or", "fields": [
        { "type": "in", "dimension": "a_id", "values": ["a", "b", "c"] },
        { "type": "in", "dimension": "b_id", "values": ["m", "n", "p"] }
      ]}
    ]
  },
  "aggregations": [
    { "type": "longSum", "name": "unique_p_hll", "fieldName": "p_id" }
  ],
  "intervals": [ "2018-08-01/2018-08-02" ]
}

但是json查询似乎返回了空结果集。 我可以在Pivot UI中正确地看到输出。通过数组列 type_labels 值显示为 {"array_element": "z"} 而不是简单地 "z" .