szehon-ho commented on code in PR #6849:
URL: https://github.com/apache/iceberg/pull/6849#discussion_r1109216083


##########
docs/spark-procedures.md:
##########
@@ -462,16 +462,29 @@ will then treat these files as if they are part of the 
set of files  owned by Ic
 
 #### Usage
 
-| Argument Name | Required? | Type | Description |
-|---------------|-----------|------|-------------|
-| `table`       | ✔️  | string | Table which will have files added to|
-| `source_table`| ✔️  | string | Table where files should come from, paths are 
also possible in the form of \`file_format\`.\`path\` |
-| `partition_filter`  | ️   | map<string, string> | A map of partitions in the 
source table to import from |
+| Argument Name | Required? | Type | Description                               
                                                                                
                             |
+|---------------|-----------|------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `table`       | ✔️  | string | Table which will have files added to          
                                                                                
                         |
+| `source_table`| ✔️  | string | Table where files should come from, paths are 
also possible in the form of \`file_format\`.\`path\`                           
                         |
+| `partition_filter`  | ️   | map<string, string> | A map of partitions in the 
source table to import from                                                     
                                            |
+| `check_duplicate_files`  | ️   | boolean | When true, will throw a exception 
if files added will result in duplicate (on by default, it's checking against 
files path in entries metadata table). |

Review Comment:
   I think we should avoid implementation details here and also try to make it 
shorter for the html table
   
   How about?
   ```
   Whether to prevent files existing in the table from being added.  (defaults 
to true)
   ```



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