SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function arrayJoin (alias search_engine) (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 1)
        Identifier SearchEngineID
    Identifier URL
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test.hits
   Function and (children 1)
    ExpressionList (children 2)
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier SearchEngineID
       Literal UInt64_0
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier search_engine
       Literal UInt64_0
 Identifier Null