debabhishek53 commented on code in PR #4171:
URL: https://github.com/apache/gobblin/pull/4171#discussion_r2936964211


##########
gobblin-data-management/src/main/java/org/apache/gobblin/data/management/copy/iceberg/IcebergSource.java:
##########
@@ -80,23 +82,39 @@
  * iceberg.table.name=table1
  * iceberg.catalog.uri=ICEBERG_CATALOG_URI
  *
- * # Partition filtering with lookback - Static date (hourly partitions by 
default)
+ * # Partition filtering with lookback - Static date
  * iceberg.filter.enabled=true
- * iceberg.partition.column=datepartition  # Optional, defaults to 
"datepartition"
- * iceberg.filter.date=2025-04-01         # Date value (yyyy-MM-dd format)
+ * iceberg.partition.column=datepartition         # Optional, defaults to 
"datepartition"
+ * iceberg.filter.date=2025-04-01                 # Input date always in 
yyyy-MM-dd format
  * iceberg.lookback.days=3
- * # iceberg.hourly.partition.enabled=true  # Optional, defaults to true; 
generates yyyy-MM-dd-00 format
  *
- * # Partition filtering with lookback - Scheduled flows (dynamic date)
+ * # Partition filtering - Scheduled flows (dynamic date)
  * iceberg.filter.enabled=true
- * iceberg.filter.date=CURRENT_DATE       # Uses current date at runtime
+ * iceberg.filter.date=CURRENT_DATE               # Resolved to current date 
at runtime
  * iceberg.lookback.days=3
  *
- * # Standard daily partitions (disable hourly suffix if table uses yyyy-MM-dd 
format)
- * iceberg.filter.enabled=true
- * iceberg.filter.date=2025-04-01         # Date in yyyy-MM-dd format
- * iceberg.hourly.partition.enabled=false # Set false for non-hourly partitions
- * iceberg.lookback.days=3
+ * # --- Recommended: configurable partition value format ---
+ * # iceberg.partition.value.format is a DateTimeFormatter pattern applied to 
the output
+ * # partition value used in the filter expression. The input date is always 
yyyy-MM-dd.
+ * # When set, it supersedes iceberg.hourly.partition.enabled.
+ *
+ * # Standard hourly partitions (yyyy-MM-dd-HH)
+ * iceberg.partition.value.format=yyyy-MM-dd-HH   # → "2025-04-01-05"
+ * iceberg.partition.hour=5                        # Hour 0-23, default 0

Review Comment:
   Resolved with new commit



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