baiyangtx commented on code in PR #2814:
URL: https://github.com/apache/amoro/pull/2814#discussion_r1594867362


##########
amoro-mixed-format/amoro-mixed-format-flink/amoro-mixed-format-flink-common/src/main/java/org/apache/amoro/flink/catalog/FlinkUnifiedCatalog.java:
##########
@@ -221,8 +226,25 @@ public void createTable(ObjectPath tablePath, 
CatalogBaseTable table, boolean ig
     TableIdentifier tableIdentifier =
         TableIdentifier.of(
             unifiedCatalog.name(), tablePath.getDatabaseName(), 
tablePath.getObjectName());
+    if (!configuration.contains(TABLE_FORMAT)) {

Review Comment:
   ```suggestion
       if (!configuration.contains(TABLE_FORMAT) && ignoreIfExists && 
unfiiedCatalog.tableExists()) {
   ```



##########
amoro-mixed-format/amoro-mixed-format-flink/amoro-mixed-format-flink-common/src/main/java/org/apache/amoro/flink/catalog/FlinkUnifiedCatalog.java:
##########
@@ -221,8 +226,25 @@ public void createTable(ObjectPath tablePath, 
CatalogBaseTable table, boolean ig
     TableIdentifier tableIdentifier =
         TableIdentifier.of(
             unifiedCatalog.name(), tablePath.getDatabaseName(), 
tablePath.getObjectName());
+    if (!configuration.contains(TABLE_FORMAT)) {
+      // if user doesn't specify the table format, we try to load the table 
and get the table
+      // format.
+      try {
+        AmoroTable amoroTable =
+            unifiedCatalog.loadTable(tableIdentifier.getDatabase(), 
tableIdentifier.getTableName());
+        format = amoroTable.format();
+      } catch (Throwable t) {
+        LOG.warn(
+            "We can't load table {}.{} through unifiedCatalog, use default 
format {}",
+            tablePath.getDatabaseName(),
+            tablePath.getObjectName(),
+            format.name());
+      }
+    }
+    final TableFormat catalogFormat = format;
     AbstractCatalog catalog =
-        getOriginalCatalog(format).orElseGet(() -> 
createOriginalCatalog(tableIdentifier, format));
+        getOriginalCatalog(format)
+            .orElseGet(() -> createOriginalCatalog(tableIdentifier, 
catalogFormat));

Review Comment:
   I think we could support a property of catalog which define a defult table 
format when creating a table without specific the format.



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