feat: update partition spec

src/iceberg/CMakeLists.txt

@@ -77,6 +77,7 @@ set(ICEBERG_SOURCES
     transform_function.cc
     type.cc
     update/pending_update.cc
+    update/update_partition_spec.cc
     update/update_properties.cc
     util/bucket_util.cc
     util/conversions.cc

src/iceberg/meson.build

@@ -99,6 +99,7 @@ iceberg_sources = files(
     'transform_function.cc',
     'type.cc',
     'update/pending_update.cc',
+    'update/update_partition_spec.cc',
     'update/update_properties.cc',
     'util/bucket_util.cc',
     'util/conversions.cc',

src/iceberg/table.cc

@@ -19,6 +19,8 @@
 
 #include "iceberg/table.h"
 
+#include <memory>
+
 #include "iceberg/catalog.h"
 #include "iceberg/partition_spec.h"
 #include "iceberg/result.h"
@@ -28,6 +30,7 @@
 #include "iceberg/table_properties.h"
 #include "iceberg/table_scan.h"
 #include "iceberg/transaction.h"
+#include "iceberg/update/update_partition_spec.h"
 #include "iceberg/update/update_properties.h"
 #include "iceberg/util/macros.h"
 
@@ -154,6 +157,13 @@ Result<std::shared_ptr<UpdateProperties>> Table::NewUpdateProperties() {
   return transaction->NewUpdateProperties();
 }
 
+Result<std::shared_ptr<UpdatePartitionSpec>> Table::NewUpdateSpec() {
+  ICEBERG_ASSIGN_OR_RAISE(
+      auto transaction, Transaction::Make(shared_from_this(), Transaction::Kind::kUpdate,
+                                          /*auto_commit=*/true));
+  return transaction->NewUpdateSpec();
+}
+
 Result<std::shared_ptr<StagedTable>> StagedTable::Make(
     TableIdentifier identifier, std::shared_ptr<TableMetadata> metadata,
     std::string metadata_location, std::shared_ptr<FileIO> io,

src/iceberg/table.h

@@ -132,6 +132,10 @@ class ICEBERG_EXPORT Table : public std::enable_shared_from_this<Table> {
   /// changes.
   virtual Result<std::shared_ptr<UpdateProperties>> NewUpdateProperties();
 
+  /// \brief Create a new UpdatePartitionSpec to update the partition spec of this table
+  /// and commit the changes.
+  virtual Result<std::shared_ptr<UpdatePartitionSpec>> NewUpdateSpec();
+
  protected:
   Table(TableIdentifier identifier, std::shared_ptr<TableMetadata> metadata,
         std::string metadata_location, std::shared_ptr<FileIO> io,

src/iceberg/test/CMakeLists.txt

@@ -153,6 +153,7 @@ if(ICEBERG_BUILD_BUNDLE)
                    USE_BUNDLE
                    SOURCES
                    transaction_test.cc
+                   update_partition_spec_test.cc
                    update_properties_test.cc)
 
 endif()