laskoviymishka opened a new pull request, #823:
URL: https://github.com/apache/iceberg-go/pull/823

   Closes #808.
   
   For partitioned tables, the equality delete writer now expands the record 
schema to include partition source columns alongside the equality key columns. 
This allows the existing partitionedFanoutWriter to extract partition values 
and route records to the correct partition directories. The actual delete files 
still contain only the equality key columns — partition columns are used for 
routing and stripped during the ToRequestedSchema projection.
   
   When partition source columns overlap with the equality key (e.g., deleting 
by partition column), no extra columns are needed.


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