CreateQuery department (children 3)
 Identifier department
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration parent_department (children 1)
    DataType UInt64
   ColumnDeclaration name (children 1)
    DataType String
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
