* - Queries can be used to update records:
*
* $set Field set operation.
- * - {.., '$set' : {'field1' : val1, 'fieldN' : valN}}
+ * - {.., '$set' : {'fpath1' : val1, 'fpathN' : valN}}
* $upsert Atomic upsert. If matching records are found it will be '$set' operation,
* otherwise new record will be inserted
* with fields specified by argment object.
- * - {.., '$upsert' : {'field1' : val1, 'fieldN' : valN}}
+ * - {.., '$upsert' : {'fpath1' : val1, 'fpathN' : valN}}
* $inc Increment operation. Only number types are supported.
* - {.., '$inc' : {'fpath1' : number, ..., 'fpath2' : number}
* $dropall In-place record removal operation.