CreateQuery src (children 3)
 Identifier src
 Storage definition (children 2)
  Function MergeTree
  Identifier id
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 2)
     Identifier number (alias id)
     Function toInt32 (alias value) (children 1)
      ExpressionList (children 1)
       Literal UInt64_1
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Function numbers (children 1)
        ExpressionList (children 1)
         Literal UInt64_1