[YCQL] Reported CQL Query Latency is suspiciously low

[karthik-ramanathan-3006]

Jira Link: DB-8802

Description

It has been observed that CQL SELECTs fetching millions of rows (and reading a lot more) report a query latency of the order of milliseconds.

Logs:

W1018 14:22:06.371112 20984 cql_rpc.cc:338] CQL Call from 10.254.1.76:16295, stream id: 0 took 240ms. Details:  <<<<<<<<<<<<
W1018 14:22:06.371150 20984 cql_rpc.cc:341] cql_details {
  type: "QUERY"
  call_details {
    sql_string: "<redacted>"
  }
}

The expected query latency should be of the several seconds if not minutes.
More details in the JIRA ticket.

Issue Type

kind/bug

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