SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Function finalizeAggregation (children 1)
     ExpressionList (children 1)
      Function uniqThetaUnion (children 1)
       ExpressionList (children 2)
        Identifier a
        Identifier b
    Function finalizeAggregation (children 1)
     ExpressionList (children 1)
      Identifier a
    Function finalizeAggregation (children 1)
     ExpressionList (children 1)
      Identifier b
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 2)
           Function arrayReduce (alias a) (children 1)
            ExpressionList (children 2)
             Literal \'uniqThetaState\'
             Function array (children 1)
              ExpressionList
           Function arrayReduce (alias b) (children 1)
            ExpressionList (children 2)
             Literal \'uniqThetaState\'
             Function array (children 1)
              ExpressionList
