suneet-s opened a new issue #9699: EXPLAIN SQL query with no limit generates 
invalid query
URL: https://github.com/apache/druid/issues/9699
 
 
   Please provide a detailed title (e.g. "Broker crashes when using TopN query 
with Bound filter" instead of just "Broker crashes").
   
   ### Affected Version
   
   Tested in 0.18, haven't verified in older versions
   
   ### Description
   
   If you use the web console's explain feature for a query with smart limits 
disabled it generates an invalid SQL query
   
   ```
   SELECT * from wikipedia
   ```
   
   generates
   
   ```
   {
     "queryType": "scan",
     "dataSource": {
       "type": "table",
       "name": "wikipedia"
     },
     "intervals": {
       "type": "intervals",
       "intervals": [
         "-146136543-09-08T08:23:32.096Z/146140482-04-24T15:36:27.903Z"
       ]
     },
     "virtualColumns": [],
     "resultFormat": "compactedList",
     "batchSize": 20480,
     "limit": 9223372036854776000,
     "order": "none",
     "filter": null,
     "columns": [
       "__time",
       "channel",
       "cityName",
       "comment",
       "count",
       "countryIsoCode",
       "countryName",
       "diffUrl",
       "flags",
       "isAnonymous",
       "isMinor",
       "isNew",
       "isRobot",
       "isUnpatrolled",
       "namespace",
       "page",
       "regionIsoCode",
       "regionName",
       "sum_added",
       "sum_blah",
       "sum_blah2",
       "sum_blah3",
       "sum_commentLength",
       "sum_deleted",
       "sum_delta",
       "sum_deltaBucket",
       "user"
     ],
     "legacy": false,
     "context": {
       "sqlQueryId": "cc783735-4d86-4c29-aab3-77df8b93334f"
     },
     "descending": false,
     "granularity": {
       "type": "all"
     }
   }
   ```
   
   which fails with
   
   ```
   Numeric value (9223372036854776000) out of range of long 
(-9223372036854775808 - 9223372036854775807) at [Source: 
(org.eclipse.jetty.server.HttpInputOverHTTP); line: 1, column: 257] (through 
reference chain: org.apache.druid.query.scan.ScanQuery["limit"])
   ```

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