The previous API version(e.g. v201509 or older), criteria type
Parent was not available in the reports so rows related to Parent criteria were excluded from criteria-level reports(e.g. Criteria performance report). In v201601, the PARENT
criteria type (please see the
Predicates values) is newly added in the Criteria Performance report. In the API v201601, the user could get the PARENT criteria related records and could filter data using the predicate (using predicate value as
PARENT). The
ParentCriterionId of the
Product partition report gives the criterion ID of the product partition's parent and is not related to the Parent Criterion type. Please check v201601
migration guide and
Criteria Performance report for more details.
Umesh Dengale, AdWords API Team.