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