CreateQuery t0 (children 3)
 Identifier t0
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration c0 (children 1)
    DataType Tuple (children 1)
     ExpressionList (children 2)
      NameTypePair a (children 1)
       DataType Int32
      NameTypePair b (children 1)
       DataType Nullable (children 1)
        ExpressionList (children 1)
         DataType Int32
   ColumnDeclaration c1 (children 1)
    DataType Int32
 Storage definition (children 2)
  Function CoalescingMergeTree (children 1)
   ExpressionList
  Identifier c1
