dramaticlly commented on code in PR #12228:
URL: https://github.com/apache/iceberg/pull/12228#discussion_r2364427744


##########
core/src/main/java/org/apache/iceberg/BaseMetastoreCatalog.java:
##########
@@ -71,23 +70,34 @@ public Table loadTable(TableIdentifier identifier) {
   }
 
   @Override
-  public Table registerTable(TableIdentifier identifier, String 
metadataFileLocation) {
+  public Table registerTable(
+      TableIdentifier identifier, String metadataFileLocation, boolean 
overwrite) {
     Preconditions.checkArgument(
         identifier != null && isValidIdentifier(identifier), "Invalid 
identifier: %s", identifier);
     Preconditions.checkArgument(
         metadataFileLocation != null && !metadataFileLocation.isEmpty(),
         "Cannot register an empty metadata file location as a table");
 
-    // Throw an exception if this table already exists in the catalog.
-    if (tableExists(identifier)) {
-      throw new AlreadyExistsException("Table already exists: %s", identifier);
-    }
-
     TableOperations ops = newTableOps(identifier);
-    InputFile metadataFile = ops.io().newInputFile(metadataFileLocation);
-    TableMetadata metadata = TableMetadataParser.read(ops.io(), metadataFile);
-    ops.commit(null, metadata);
+    TableMetadata existing = ops.current();
 
+    if (tableExists(identifier)) {

Review Comment:
   Sounds good, updated the control flow as suggested and also move all 
overwrite logic into a private method



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