CreateQuery test_string_alias (children 3)
 Identifier test_string_alias
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration unhexed (children 2)
    DataType String
    Literal \'abc\'
   ColumnDeclaration hexed (children 2)
    DataType FixedString (children 1)
     ExpressionList (children 1)
      Literal UInt64_4
    Function unhex (children 1)
     ExpressionList (children 1)
      Identifier unhexed
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
