CreateQuery tab (children 3)
 Identifier tab
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration long_string (children 2)
    DataType String
    Set
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
