SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier db.name
    Identifier t.name
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (alias t) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 2)
           Identifier name
           Identifier database
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.tables
          Function equals (children 1)
           ExpressionList (children 2)
            Identifier name
            Literal \'one\'
    TablesInSelectQueryElement (children 2)
     TableExpression (children 1)
      Subquery (alias db) (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 3)
          ExpressionList (children 1)
           Identifier name
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.databases
          Function equals (children 1)
           ExpressionList (children 2)
            Identifier name
            Literal \'system\'
     TableJoin (children 1)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier t.database
        Identifier db.name
 Identifier PrettyCompactNoEscapes