Filtering with RSQL queries

Some resources, including eventApiProducts and applicationRegistrations, include a where query parameter to provide a query string for filtering entities. The query string is expressed in FIQL/RSQL language.

• To filter on document properties, use:
  ?where=brokerType==solace;state==RELEASED
• Query sub-elements using dot notation. For example plan.name==Gold matches all plans where the name starts with Gold. This also applies to querying nested arrays.
• Queries on attributes where the name and the value must match specific criteria can be expressed by grouping the name and value search criteria:
  ?where=(attributes.name==color;attributes.value==red)
  matches all objects where the value of attribute color is red.
• Queries on a combination of attributes are also possible:
  (attributes.name==color;attributes.value==Bl_);(attributes.name==flavour;attributes.value==_Berry) only matches documents where color starts with Bl and the flavour attribute ends in berry.

See https://github.com/jirutka/rsql-parser for details of the supported query operators and syntax.

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applicationRegistrations/{registrationId}/accessRequests) does NOT currently support the where query parameter