WHERE conditions with double qouted strings are not considered an error

[gabor]

if you use ParseQuery() with a query like SELECT field FROM cpu WHERE cpu = "cpu2", it does not return an error.

based on the documentation at https://docs.influxdata.com/influxdb/v1.8/query_language/explore-data/#fields and https://docs.influxdata.com/influxdb/v1.8/query_language/explore-data/#tags , strings must be single-quoted.