question: public Result result ( SqlNode node , Collection < Clause > clauses , RelNode rel ) { final String alias2 = SqlValidatorUtil . getAlias ( node , - 1 ) ; final String alias3 = alias2 != null ? alias2 : "t" ; final String alias4 = SqlValidatorUtil . uniquify ( alias3 , aliasSet , SqlValidatorUtil . EXPR_SUGGESTER ) ; final String alias5 = alias2 == null || ! alias2 . equals ( alias4 ) ? alias4 : null ; return new Result ( node , clauses , alias5 , Collections . singletonList ( Pair . of ( alias4 , rel . getRowType ( ) ) ) ) ; }
target:  Creates a result based on a single relational expression.