CreateQuery t (children 3)
 Identifier t
 Columns definition (children 2)
  ExpressionList (children 5)
   ColumnDeclaration uid (children 1)
    DataType Int16
   ColumnDeclaration name (children 1)
    DataType String
   ColumnDeclaration age (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Int8
   ColumnDeclaration i (children 1)
    DataType Int16
   ColumnDeclaration j (children 1)
    DataType Int16
  ExpressionList (children 1)
   Projection (children 1)
    ProjectionSelectQuery (children 2)
     ExpressionList (children 4)
      Identifier name
      Identifier age
      Function uniq (children 1)
       ExpressionList (children 1)
        Identifier i
      Function count (children 1)
       ExpressionList (children 1)
        Identifier j
     ExpressionList (children 2)
      Identifier name
      Identifier age
 Storage definition (children 3)
  Function MergeTree
  Identifier uid
  Set
