jOOQ: “error: relation CTE does not exist”

问题

Using jOOQ 3.11.2 and Postgres 9.4, I am trying to re-use one jOOQ CTE in the definition of a second CTE.

The following is incorrect per StackOverflow question How to re-use one CTE in another CTE in jOOQ

   CommonTableExpression<...> cteTwo = name().fields().as(select( with(cteOne ... ).from(cteOne) );

Based on the above answer I omitted the with(cteOne) clause in cteTwo completely. I tried:

  import static org.jooq.impl.DSL.*;

  CommonTableExpression<...> cteOne = name().fields().as(select(...); 
  CommonTableExpression<...> cteTwo = name().fields().as(select().from(cteOne) ); // seem to need with(cteOne) here. 

      List<someDTO> result = create
                 .with(cteOne)
                 .with(CteTwo)
                 .select(...)
                  .from(cteTwo)
                  .fetchInto(someDTO.class);

The above compiles but runs with error: 'jooq: bad SQL grammar. ... ERROR: relation \"cteOne\" does not exist.' Looking at the generated SQL, there is no reference to cteOne within cteTwo.

Then I tried putting with(cteOne) clause in different places within inside the cteTwo definition. There are only three more places before the SELECT clause to try. None were correct:

  CommonTableExpression<...> cteTwo = with(cteOne).name().fields().as(select(  ... ).from(cteOne) ); 
  CommonTableExpression<...> cteTwo = name() with(cteOne).fields().as(select(  ... ).from(cteOne) ); 
  CommonTableExpression<...> cteTwo = name().fields().with(cteOne).as(select(  ... ).from(cteOne) ); 

Please note that this different from defining several CTE's and then using each CTE in a final select statement like so:

 CommonTableExpression<...> cteAlpha = name(...).fields(...).as(select(...);
 CommonTableExpression<...> cteBeta = name(...).fields(...).as(select(...);

  List<SomeDTO> list = create
  .with(cteAlpha)
  .with(cteBeta)
  .select(...) from(cteAlpha, cteBeta).fetchInto(SomeDTO.class);  

I haven't found documentation or examples covering this precise point. How should this be done?

来源：https://stackoverflow.com/questions/59271846/jooq-error-relation-cte-does-not-exist