korlov42 commented on code in PR #6648:
URL: https://github.com/apache/ignite-3/pull/6648#discussion_r2381979644


##########
modules/catalog/src/main/java/org/apache/ignite/internal/catalog/storage/UpdateTable.java:
##########
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.ignite.internal.catalog.storage;
+
+import static 
org.apache.ignite.internal.catalog.commands.CatalogUtils.defaultZoneIdOpt;
+import static 
org.apache.ignite.internal.catalog.commands.CatalogUtils.replaceSchema;
+import static 
org.apache.ignite.internal.catalog.commands.CatalogUtils.replaceTable;
+import static 
org.apache.ignite.internal.catalog.commands.CatalogUtils.schemaOrThrow;
+import static 
org.apache.ignite.internal.catalog.commands.CatalogUtils.tableOrThrow;
+
+import org.apache.ignite.internal.catalog.Catalog;
+import org.apache.ignite.internal.catalog.descriptors.CatalogSchemaDescriptor;
+import org.apache.ignite.internal.catalog.descriptors.CatalogTableDescriptor;
+import org.apache.ignite.internal.hlc.HybridTimestamp;
+
+/** Interface describing a particular change to a table within the {@link 
VersionedUpdate group}. */
+interface UpdateTable extends UpdateEntry {
+    @Override
+    default Catalog applyUpdate(Catalog catalog, HybridTimestamp timestamp) {
+        CatalogTableDescriptor table = tableOrThrow(catalog, tableId());
+        CatalogSchemaDescriptor schema = schemaOrThrow(catalog, 
table.schemaId());
+
+        CatalogTableDescriptor modifiedTable = newTableDescriptor(table)
+                .tableVersion(newTableVersion(table))

Review Comment:
   that's not correct for a generic `UpdateTable` handler. Version should be 
bumped only when table's schema (e.g. table's columns) is modified somehow



##########
modules/catalog/src/main/java/org/apache/ignite/internal/catalog/descriptors/CatalogTableDescriptor.java:
##########
@@ -282,4 +250,199 @@ public String storageProfile() {
         return storageProfile;
     }
 
+    /**
+     * {@code CatalogTableDescriptor} builder static inner class.
+     */
+    public static final class Builder {
+        private int id;
+        private String name;
+        private int zoneId;
+        private int schemaId;
+        private int pkIndexId;
+        private CatalogTableSchemaVersions schemaVersions;
+        private List<CatalogTableColumnDescriptor> columns;
+        private List<String> primaryKeyColumns;
+        @Nullable private List<String> colocationColumns;
+        private String storageProfile;
+        private HybridTimestamp timestamp = INITIAL_TIMESTAMP;
+        private int tableVersion = 0;

Review Comment:
   why do we need explicit field for `tableVersion`? It's always been 
representing version of the table row, not the table itself.



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