Core: Add content field to ManifestTable Schema.

core/src/main/java/org/apache/iceberg/AllManifestsTable.java

@@ -53,7 +53,8 @@ public class AllManifestsTable extends BaseMetadataTable {
           Types.NestedField.required(11, "contains_nan", Types.BooleanType.get()),
           Types.NestedField.optional(12, "lower_bound", Types.StringType.get()),
           Types.NestedField.optional(13, "upper_bound", Types.StringType.get())
-      )))
+      ))),
+      Types.NestedField.optional(14, "content", Types.IntegerType.get(), "Contents of the manifest: 0=data, 1=deletes")
   );
 
   AllManifestsTable(TableOperations ops, Table table) {

core/src/main/java/org/apache/iceberg/ManifestsTable.java

@@ -41,7 +41,8 @@ public class ManifestsTable extends BaseMetadataTable {
           Types.NestedField.required(11, "contains_nan", Types.BooleanType.get()),
           Types.NestedField.optional(12, "lower_bound", Types.StringType.get()),
           Types.NestedField.optional(13, "upper_bound", Types.StringType.get())
-      )))
+      ))),
+      Types.NestedField.required(14, "content", Types.IntegerType.get(), "Contents of the manifest: 0=data, 1=deletes")
   );
 
   private final PartitionSpec spec;
@@ -94,7 +95,8 @@ static StaticDataTask.Row manifestFileToRow(PartitionSpec spec, ManifestFile man
         manifest.addedFilesCount(),
         manifest.existingFilesCount(),
         manifest.deletedFilesCount(),
-        partitionSummariesToRows(spec, manifest.partitions())
+        partitionSummariesToRows(spec, manifest.partitions()),
+        manifest.content().id()
     );
   }
 

spark/src/test/java/org/apache/iceberg/spark/source/TestIcebergSourceTablesBase.java

@@ -717,6 +717,7 @@ public void testManifestsTable() {
                     .set("upper_bound", "1")
                     .build()
                 ))
+            .set("content", manifest.content().id())
             .build()
     );
 
@@ -772,6 +773,7 @@ public void testAllManifestsTable() {
                     .set("upper_bound", "1")
                     .build()
             ))
+            .set("content", manifest.content().id())
             .build()
     ));