Microsoft Fabric Copy Job connector support matrix for Informix connector supports Full Load operations, but it does not currently support Incremental Load (watermark-based) operations
Because Fabric Data Factory Copy Jobs don't yet support incremental/delta copy for IBM Informix, we've had to build a custom pipeline (rather than using a native Delta Copy Job) to approximate delta loads from our Informix/Pronto ERP data. This pipeline-based approach consumes considerably more Capacity Units than a native delta copy job would and may not fit sustainably within our Fabric capacity. If it doesn't, we'll be forced back to daily full copy jobs — a significant regression from the hourly delta refresh our legacy SSIS job was able to achieve.
The CU cost of running delta via a pipeline (versus a native Copy Job) means the refresh cadence we can sustain is at risk of dropping from hourly to daily. In practice this means data that previously updated every hour now risks sitting stale for most of the day, with no clear way to restore that cadence without native incremental support for Informix.
Requesting to add Informix to support Incremental Load as it is crucial part of the operation sustainability and efficiency.
