CreateQuery test_dictionary_10_shards_nullable (children 3)
 Identifier test_dictionary_10_shards_nullable
 ExpressionList (children 2)
  DictionaryAttributeDeclaration key (children 1)
   DataType UInt64
  DictionaryAttributeDeclaration value (children 1)
   DataType Nullable (children 1)
    ExpressionList (children 1)
     DataType UInt16
 Dictionary definition (children 4)
  ExpressionList (children 1)
   Identifier key
  FunctionWithKeyValueArguments  clickhouse (children 1)
   ExpressionList (children 1)
    pair (children 1)
     Identifier test_table_nullable
  Dictionary lifetime
  Dictionary layout (children 1)
   ExpressionList (children 1)
    pair (children 1)
     Literal UInt64_10