Add support for table comments

src/Knet.Kudu.Client/AlterTableBuilder.cs

@@ -58,6 +58,16 @@ public AlterTableBuilder SetOwner(string owner)
             return this;
         }
 
+        /// <summary>
+        /// Change a table's comment.
+        /// </summary>
+        /// <param name="comment">The new table comment.</param>
+        public AlterTableBuilder SetComment(string comment)
+        {
+            _request.NewTableComment = comment;
+            return this;
+        }
+
         /// <summary>
         /// Add a new column to the table. The column defaults to a
         /// nullable non-key column.

src/Knet.Kudu.Client/KuduScanTokenBuilder.cs

@@ -118,7 +118,10 @@ public async ValueTask<List<KuduScanToken>> BuildAsync(
                     tableMetadataPb.Owner = Table.Owner;
                 }
 
-                // TODO: Set table comment
+                if (Table.Comment is not null)
+                {
+                    tableMetadataPb.Comment = Table.Comment;
+                }
 
                 if (Table.ExtraConfig.Count > 0)
                 {

src/Knet.Kudu.Client/KuduTable.cs

@@ -40,6 +40,11 @@ public KuduTable(GetTableSchemaResponsePB schemaPb)
         /// </summary>
         public string Owner => SchemaPb.Owner;
 
+        /// <summary>
+        /// The comment on the table.
+        /// </summary>
+        public string Comment => SchemaPb.Comment;
+
         public override string ToString() => TableName;
 
         /// <summary>

src/Knet.Kudu.Client/TableBuilder.cs

@@ -71,6 +71,16 @@ public TableBuilder SetOwner(string owner)
             return this;
         }
 
+        /// <summary>
+        /// Set the table comment.
+        /// </summary>
+        /// <param name="comment">The table comment.</param>
+        public TableBuilder SetComment(string comment)
+        {
+            _createTableRequest.Comment = comment;
+            return this;
+        }
+
         /// <summary>
         /// Sets the dimension label for all tablets created at table creation time.
         /// 

test/Knet.Kudu.Client.FunctionalTests/AlterTableTests.cs

@@ -545,6 +545,25 @@ await _client.AlterTableAsync(new AlterTableBuilder(table)
             Assert.Equal(newOwner, table.Owner);
         }
 
+        [SkippableFact]
+        public async Task TestAlterChangeComment()
+        {
+            var originalComment = "original comment";
+            var builder = new TableBuilder(nameof(TestAlterAddColumns))
+                .AddColumn("key", KuduType.Int32, opt => opt.Key(true))
+                .AddColumn("val", KuduType.Int32)
+                .SetRangePartitionColumns("key")
+                .SetComment(originalComment);
+
+            var table = await _client.CreateTableAsync(builder);
+            Assert.Equal(originalComment, table.Comment);
+
+            var newComment = "new comment";
+            await _client.AlterTableAsync(new AlterTableBuilder(table).SetComment(newComment));
+            table = await _client.OpenTableAsync(table.TableName);
+            Assert.Equal(newComment, table.Comment);
+        }
+
         /// <summary>
         /// Creates a new table with two int columns, c0 and c1. c0 is the primary key.
         /// The table is hash partitioned on c0 into two buckets, and range partitioned