Apache Pinot

*Hi All,*
I have three date columns, So, I written like this,
```"dateTimeFieldSpecs": [
  {
    "name": "_source.startDate",
    "dataType": "STRING",
    "format": "1:SECONDS:SIMPLE_DATE_FORMAT:yyyy-MM-dd",
    "granularity": "1:DAYS"
  },
  {
    "name": "_source.lastUpdate",
    "dataType": "STRING",
    "format": "1:SECONDS:SIMPLE_DATE_FORMAT:yyyy-MM-dd HH:mm:ss",
    "granularity": "1:DAYS"
  },
  {
    "name": "_source.sDate",
    "dataType": "STRING",
    "format": "1:SECONDS:SIMPLE_DATE_FORMAT:yyyy-MM-dd HH:mm:ss",
    "granularity": "1:DAYS"
  }
]```
can you please correct.
I am getting error

```{"code":400,"error":"Cannot find valid fieldSpec for timeColumn: timestamp from the table config: eventflow_REALTIME, in the schema: eventflowstats"}```
Need your help :slightly_smiling_face:

Let’s use <#C011C9JHN7R|troubleshooting> for these questions.

The error message has the info- time column (time stamp) specified in tableconfig does not exist in schema

Change the time column in table config to point to one of these name in schema

i don't have any column named 'timestamp'.