vogievetsky opened a new issue #8784: stringFirst/stringLast do not work correctly at ingest time URL: https://github.com/apache/incubator-druid/issues/8784 ### Affected Version Druid 0.16.0 ### Description It might be related to `https://github.com/apache/incubator-druid/issues/7243` I am not sure Ingested data with this spec in a quickstart cluster: ```json { "type": "index_parallel", "ioConfig": { "type": "index_parallel", "firehose": { "type": "http", "uris": [ "https://druid.apache.org/data/wikipedia.json.gz"; ] } }, "tuningConfig": { "type": "index_parallel" }, "dataSchema": { "dataSource": "wikipedia-test", "granularitySpec": { "type": "uniform", "segmentGranularity": "DAY", "queryGranularity": "HOUR", "rollup": true }, "parser": { "type": "string", "parseSpec": { "format": "json", "timestampSpec": { "column": "timestamp", "format": "iso" }, "dimensionsSpec": { "dimensions": [ "channel", "cityName", "comment", "countryIsoCode", "countryName", "flags", "isAnonymous", "isMinor", "isNew", "isRobot", "isUnpatrolled", "namespace", "page", "regionIsoCode", "regionName" ] } } }, "metricsSpec": [ { "name": "count", "type": "count" }, { "name": "sum_added", "type": "longSum", "fieldName": "added" }, { "name": "sum_commentLength", "type": "longSum", "fieldName": "commentLength" }, { "name": "sum_deleted", "type": "longSum", "fieldName": "deleted" }, { "name": "sum_metroCode", "type": "longSum", "fieldName": "metroCode" }, { "name": "sum_deltaBucket", "type": "longSum", "fieldName": "deltaBucket" }, { "name": "sum_delta", "type": "longSum", "fieldName": "delta" }, { "name": "test", "type": "stringFirst", "fieldName": "user" } ] } } ``` And got:  Also that column's data type gets reported as `OTHER` 
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