Siren Platform User Guide

Known Limitations

  • Cross backend join currently supports only integer keys.

  • Cross backend support has very different scalability according to the direction of the Join, a join which involves sending IDs to a remote system will be possibly hundreds of times less scalable (for example, thousands compared to millions) to one where the keys are fetched from a remote system.

  • Only terms aggregations can be nested inside a parent bucket aggregation.

  • The missing parameter in bucket aggregations is not supported.

  • Scripted fields are not supported.

  • When issuing queries containing string comparisons, the plugin does not force a specific collation, if a table behind a virtual indices uses a case-insensitive collation, string comparisons will be case-insensitive.

  • Wildcards on virtual index names are not supported by any API; a wildcard search will silently ignore virtual indices.

  • Currently cross cluster searches on virtual indices are not supported.