Table features interfaces/utilities for Kernel

kernel/kernel-api/src/main/java/io/delta/kernel/internal/TableConfig.java

@@ -34,6 +34,55 @@ public class TableConfig<T> {
   // TableConfigs //
   //////////////////
 
+  /**
+   * Whether this Delta table is append-only. Files can't be deleted, or values can't be updated.
+   */
+  public static final TableConfig<Boolean> APPEND_ONLY =
+      new TableConfig<>(
+          "delta.appendOnly",
+          "false",
+          Boolean::valueOf,
+          value -> true,
+          "needs to be a boolean.",
+          true);
+
+  /**
+   * Enable change data feed output. When enabled, DELETE, UPDATE, and MERGE INTO operations will
+   * need to do additional work to output their change data in an efficiently readable format.
+   */
+  public static final TableConfig<Boolean> CHANGE_DATA_FEED =
+      new TableConfig<>(
+          "delta.enableChangeDataFeed",
+          "false",
+          Boolean::valueOf,
+          value -> true,
+          "needs to be a boolean.",
+          true);
+
+  /** Whether commands modifying this Delta table are allowed to create new deletion vectors. */
+  public static final TableConfig<Boolean> ENABLE_DELETION_VECTORS_CREATION =
+      new TableConfig<>(
+          "delta.enableDeletionVectors",
+          "false",
+          Boolean::valueOf,
+          value -> true,
+          "needs to be a boolean.",
+          true);
+
+  /**
+   * Indicates whether Row Tracking is enabled on the table. When this flag is turned on, all rows
+   * are guaranteed to have Row IDs and Row Commit Versions assigned to them, and writers are
+   * expected to preserve them by materializing them to hidden columns in the data files.
+   */
+  public static final TableConfig<Boolean> ROW_TRACKING_ENABLED =
+      new TableConfig<>(
+          "delta.enableRowTracking",
+          "false",
+          Boolean::valueOf,
+          value -> true,
+          "needs to be a boolean.",
+          true);
+
   /**
    * The shortest duration we have to keep logically deleted data files around before deleting them
    * physically.
@@ -170,6 +219,19 @@ public class TableConfig<T> {
           "needs to be a boolean.",
           true);
 
+  /**
+   * Whether widening the type of an existing column or field is allowed, either manually using
+   * ALTER TABLE CHANGE COLUMN or automatically if automatic schema evolution is enabled.
+   */
+  public static final TableConfig<Boolean> ENABLE_TYPE_WIDENING =
+      new TableConfig<>(
+          "delta.enableTypeWidening",
+          "false",
+          Boolean::valueOf,
+          value -> true,
+          "needs to be a boolean.",
+          true);
+
   /** All the valid properties that can be set on the table. */
   private static final Map<String, TableConfig<?>> VALID_PROPERTIES =
       Collections.unmodifiableMap(

kernel/kernel-api/src/main/java/io/delta/kernel/internal/TableImpl.java

@@ -29,6 +29,7 @@
 import io.delta.kernel.internal.metrics.SnapshotQueryContext;
 import io.delta.kernel.internal.metrics.SnapshotReportImpl;
 import io.delta.kernel.internal.snapshot.SnapshotManager;
+import io.delta.kernel.internal.tablefeatures.TableFeatures;
 import io.delta.kernel.internal.util.Clock;
 import io.delta.kernel.metrics.SnapshotReport;
 import io.delta.kernel.types.StructField;

kernel/kernel-api/src/main/java/io/delta/kernel/internal/TransactionBuilderImpl.java

@@ -36,6 +36,7 @@
 import io.delta.kernel.internal.replay.LogReplay;
 import io.delta.kernel.internal.snapshot.LogSegment;
 import io.delta.kernel.internal.snapshot.SnapshotHint;
+import io.delta.kernel.internal.tablefeatures.TableFeatures;
 import io.delta.kernel.internal.util.ColumnMapping;
 import io.delta.kernel.internal.util.ColumnMapping.ColumnMappingMode;
 import io.delta.kernel.internal.util.SchemaUtils;
@@ -154,9 +155,9 @@ public Transaction build(Engine engine) {
       if (!newWriterFeatures.isEmpty()) {
         logger.info("Automatically enabling writer features: {}", newWriterFeatures);
         shouldUpdateProtocol = true;
-        List<String> oldWriterFeatures = protocol.getWriterFeatures();
+        Set<String> oldWriterFeatures = protocol.getWriterFeatures();
         protocol = protocol.withNewWriterFeatures(newWriterFeatures);
-        List<String> curWriterFeatures = protocol.getWriterFeatures();
+        Set<String> curWriterFeatures = protocol.getWriterFeatures();
         checkArgument(!Objects.equals(oldWriterFeatures, curWriterFeatures));
         TableFeatures.validateWriteSupportedTable(
             protocol, metadata, metadata.getSchema(), table.getPath(engine));

kernel/kernel-api/src/main/java/io/delta/kernel/internal/TransactionImpl.java

@@ -35,6 +35,7 @@
 import io.delta.kernel.internal.replay.ConflictChecker;
 import io.delta.kernel.internal.replay.ConflictChecker.TransactionRebaseState;
 import io.delta.kernel.internal.rowtracking.RowTracking;
+import io.delta.kernel.internal.tablefeatures.TableFeatures;
 import io.delta.kernel.internal.util.*;
 import io.delta.kernel.metrics.TransactionReport;
 import io.delta.kernel.types.StructType;