Mark Paluch

The transformer design creates excessive array lists on each operation. While this seems appropriate for query rewrite (applying `Sort`, deriving a `COUNT` query), detecting projections, aliases, and constructor expressions follows...

We should expose the most concrete return type on our repository and Template API implementation

JDBC repositories exclusively use individual low-level components such as `JdbcTemplate`, `JdbcConverter` and such to run repository queries (except for `SimpleJdbcRepository`). This story ticket aggregates multiple tasks to revise that support...

Add support for property-specific conversions

1

See https://github.com/spring-projects/spring-data-mongodb/issues/3596

Refine collection-like property conversion using arrays

2

We have multiple places that deal with array conversion also outside of the converter. That isn't ideal as array handling is distributed across the code base. Also, we do not...

`addConvertedPropertyValuesAsList` interacts with the converter multiple times to write a JDBC value for each collection entry. Ideally, we move these calls into `JdbcConverter` to improve locality and have an improved...

With the availability of IBM's R2DBC driver for DB2 we should add support to integrate it through a Dialect and an appropriate test suite. See https://github.com/ibmdb/java_reactive_driver