CreateQuery test1 (children 3)
 Identifier test1
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration year (children 1)
    DataType String
   ColumnDeclaration uv (children 1)
    DataType AggregateFunction (children 1)
     ExpressionList (children 2)
      Identifier uniqTheta
      DataType Int64
 Storage definition (children 2)
  Function AggregatingMergeTree (children 1)
   ExpressionList
  Identifier year
