CreateQuery foo_replacing_merge_tree (children 3)
 Identifier foo_replacing_merge_tree
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType Int8
   ColumnDeclaration y (children 1)
    DataType String
 Storage definition (children 2)
  Function ReplacingMergeTree
  Identifier x
