Fix encoding and add test

Author: ianton-ru

src/Databases/DataLake/RestCatalog.cpp

@@ -702,7 +702,7 @@ void RestCatalog::sendRequest(const String & endpoint, Poco::JSON::Object::Ptr r
         };
     }
 
-    Poco::URI url(endpoint);
+    Poco::URI url(endpoint, false);
     auto wb = DB::BuilderRWBufferFromHTTP(url)
         .withConnectionGroup(DB::HTTPConnectionGroupType::HTTP)
         .withMethod(method)

tests/integration/test_database_iceberg/test.py

@@ -560,6 +560,7 @@ def test_create(started_cluster):
     node.query(f"INSERT INTO {CATALOG_NAME}.`{root_namespace}.{table_name}` VALUES ('AAPL');", settings={"allow_experimental_insert_into_iceberg": 1, 'write_full_path_in_iceberg_metadata': 1})
     assert node.query(f"SELECT * FROM {CATALOG_NAME}.`{root_namespace}.{table_name}`") == "AAPL\n"
 
+
 def test_drop_table(started_cluster):
     node = started_cluster.instances["node1"]
 
@@ -575,3 +576,27 @@ def test_drop_table(started_cluster):
 
     drop_clickhouse_iceberg_table(node, root_namespace, table_name)
     assert len(catalog.list_tables(root_namespace)) == 0
+
+
+def test_table_with_slash(started_cluster):
+    node = started_cluster.instances["node1"]
+
+    # pyiceberg at current moment (version 0.9.1) has a bug with table names with slashes
+    # see https://github.com/apache/iceberg-python/issues/2462
+    # so we need to encode it manually
+    table_raw_suffix = "table/foo"
+    table_encoded_suffix = "table%2Ffoo"
+
+    test_ref = f"test_list_tables_{uuid.uuid4()}"
+    table_name = f"{test_ref}_{table_raw_suffix}"
+    table_encoded_name = f"{test_ref}_{table_encoded_suffix}"
+    root_namespace = f"{test_ref}_namespace"
+
+    catalog = load_catalog_impl(started_cluster)
+    catalog.create_namespace(root_namespace)
+
+    create_table(catalog, root_namespace, table_name, DEFAULT_SCHEMA, PartitionSpec(), DEFAULT_SORT_ORDER)
+
+    create_clickhouse_iceberg_database(started_cluster, node, CATALOG_NAME)
+    node.query(f"INSERT INTO {CATALOG_NAME}.`{root_namespace}.{table_encoded_name}` VALUES (NULL, 'AAPL', 193.24, 193.31, tuple('bot'));", settings={"allow_experimental_insert_into_iceberg": 1, 'write_full_path_in_iceberg_metadata': 1})
+    assert node.query(f"SELECT * FROM {CATALOG_NAME}.`{root_namespace}.{table_encoded_name}`") == "\\N\tAAPL\t193.24\t193.31\t('bot')\n"