spring-projects / spring-projects/spring-data-relational

PartTreeR2dbcQuery incorrectly blocks flux publishers for name derived query params

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@mp911de is already working on this.

Since May 12, 2025.

status: waiting-for-triage
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Description

Consider this name derived query:

Flux<Film> findByFilmIdInOrderByFilmIdAsc(Flux<Long> filmIds);

When we get to here:

https://github.com/spring-projects/spring-data-relational/blob/main/spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/repository/query/PartTreeR2dbcQuery.java#L72

It calls R2dbcQueryCreator.validate() which eventually gets here and fails:

https://github.com/spring-projects/spring-data-relational/blob/main/spring-data-relational/src/main/java/org/springframework/data/relational/repository/query/RelationalQueryCreator.java#L130

However, this functionality is actually supported here:

https://github.com/spring-projects/spring-data-relational/blob/main/spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/repository/query/R2dbcParameterAccessor.java#L119

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