### Req
POST http://admin:admin@localhost:3000/apis/query.grafana.app/v0alpha1/namespaces/default/sqlschemas?ds_type=__expr__&expression=true
content-type: application/json

{
  "queries": [
    {
      "datasource": {
        "uid": "9c3MNrV4k",
        "type": "grafana-mock-datasource"
      },
      "frames": [
        {
          "count": 1,
          "disabled": false,
          "fields": [
            {
              "disabled": false,
              "labels": "host=a",
              "name": "cpu",
              "type": "nullable-float64",
              "value": "3.14"
            },
            {
              "disabled": false,
              "labels": "host=b",
              "name": "cpu",
              "type": "nullable-float64",
              "value": "93.14"
            },
            {
              "name": "cpu",
              "type": "float64",
              "disabled": false,
              "value": "3",
              "labels": "host=x"
            },
            {
              "name": "cpu",
              "type": "float64",
              "disabled": false,
              "value": "2",
              "labels": "host=y"
            },
            {
              "name": "cpu",
              "type": "float64",
              "disabled": false,
              "value": "4",
              "labels": "host=z"
            },
            {
              "name": "cpu",
              "type": "float64",
              "disabled": false,
              "value": "1",
              "labels": "host=u"
            },
            {
              "name": "cpu",
              "type": "float64",
              "disabled": false,
              "value": "2",
              "labels": "host=v"
            },
            {
              "name": "cpu",
              "type": "float64",
              "disabled": false,
              "value": "3",
              "labels": "host=w"
            }
          ],
          "frameInputType": "numeric-wide",
          "meta": {
            "type": "numeric-wide",
            "typeVersion": [
              0,
              1
            ]
          },
          "name": "New Frame",
          "source": "count"
        }
      ],
      "generatorSource": "frontend",
      "hide": true,
      "queryType": "frames_builder",
      "rawFrameSource": "staticScenario",
      "refId": "cat",
      "resultState": "success",
      "scenario": "no-data",
      "datasourceId": 49,
      "intervalMs": 20000,
      "maxDataPoints": 1003
    },
    {
      "datasource": {
        "uid": "9c3MNrV4k",
        "type": "grafana-mock-datasource"
      },
      "frames": [
        {
          "count": 1,
          "disabled": false,
          "fields": [
            {
              "disabled": false,
              "labels": "host=a",
              "name": "cpu",
              "type": "nullable-float64",
              "value": "3.14"
            },
            {
              "disabled": false,
              "labels": "host=c",
              "name": "cpu",
              "type": "float64",
              "value": "93.14"
            }
          ],
          "frameInputType": "numeric-wide",
          "meta": {
            "type": "numeric-wide",
            "typeVersion": [
              0,
              1
            ]
          },
          "name": "New Frame",
          "source": "count"
        }
      ],
      "generatorSource": "frontend",
      "hide": true,
      "queryType": "frames_builder",
      "rawFrameSource": "staticScenario",
      "refId": "fox",
      "resultState": "success",
      "scenario": "no-data",
      "datasourceId": 49,
      "intervalMs": 20000,
      "maxDataPoints": 1003
    },
    {
      "datasource": {
        "uid": "9c3MNrV4k",
        "type": "grafana-mock-datasource"
      },
      "frames": [
        {
          "count": 1,
          "disabled": false,
          "fields": [
            {
              "disabled": false,
              "labels": "host=a",
              "name": "cpu",
              "type": "nullable-float64",
              "value": "3.14"
            },
            {
              "disabled": false,
              "labels": "host=e",
              "name": "cpu",
              "type": "nullable-float64",
              "value": "93.14"
            }
          ],
          "frameInputType": "numeric-wide",
          "meta": {
            "type": "numeric-wide",
            "typeVersion": [
              0,
              1
            ]
          },
          "name": "New Frame",
          "source": "count"
        }
      ],
      "generatorSource": "frontend",
      "hide": true,
      "queryType": "aframes_builder",
      "rawFrameSource": "staticScenario",
      "refId": "dog",
      "resultState": "success",
      "scenario": "no-data",
      "datasourceId": 49,
      "intervalMs": 20000,
      "maxDataPoints": 1003
    },
    {
      "datasource": {
        "type": "__expr__",
        "uid": "__expr__",
        "name": "Expression"
      },
      "expression": "$cat + $fox + $dog",
      "hide": false,
      "refId": "C",
      "type": "math",
      "window": ""
    }
  ],
  "from": "1690967121711",
  "to": "1690988721711"
}