somu-imply commented on PR #13268:
URL: https://github.com/apache/druid/pull/13268#issuecomment-1334524464
The `ColumnarValueUnnestCursor` was taking care of List or Strings but in
case of virtual columns they are an array of objects. The change is made to
support virtual columns and the following type of query.
```
{
"queryType": "scan",
"dataSource":{
"type": "unnest",
"base": {
"type": "table",
"name": "foo1"
},
"column": "v0",
"outputName": "unnest-v0"
}
"intervals": {
"type": "intervals",
"intervals": [
"-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z"
]
},
"virtualColumns": [
{
"type": "expression",
"name": "v0",
"expression": "array(\"m1\",\"m2\")",
"outputType": "ARRAY<LONG>"
}
],
"resultFormat": "compactedList",
"limit": 1001,
"columns": [
"unnest-v0"
],
"legacy": false,
"context": {
"populateCache": false,
"queryId": "d273facb-08cc-4de7-ac0b-d0b82173e531",
"sqlOuterLimit": 1001,
"sqlQueryId": "d273facb-08cc-4de7-ac0b-d0b82173e531",
"useCache": false,
"useNativeQueryExplain": true
},
"granularity": {
"type": "all"
}
}
```
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