CreateQuery dict_flat (children 3)
 Identifier dict_flat
 ExpressionList (children 4)
  DictionaryAttributeDeclaration key (children 2)
   DataType UInt64
   Literal UInt64_0
  DictionaryAttributeDeclaration a (children 2)
   DataType UInt8
   Literal UInt64_42
  DictionaryAttributeDeclaration b (children 2)
   DataType String
   Literal \'x\'
  DictionaryAttributeDeclaration c (children 2)
   DataType Float64
   Literal Float64_42
 Dictionary definition (children 4)
  ExpressionList (children 1)
   Identifier key
  FunctionWithKeyValueArguments  clickhouse (children 1)
   ExpressionList (children 1)
    pair (children 1)
     Literal \'t1\'
  Dictionary lifetime
  Dictionary layout (children 1)
   ExpressionList