CreateQuery n (children 3)
 Identifier n
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration nc (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType int
 Storage definition (children 4)
  Function MergeTree
  Identifier nc
  Function tuple (children 1)
   ExpressionList
  Set
