CreateQuery dst (children 3)
 Identifier dst
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType int
   ColumnDeclaration z (children 1)
    DataType int
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
