Hello! I seem to have an issue with my new limit rule which pushes down to the datastore. It works fine, unless I add an offset to the fetch. Where I end up with the following error: There are not enough rules… Missing conversion is LogicalUnion[convention: NONE -> LDAP]
Why would this only come up when an offset value is added? Thank you! Eric On Fri, Jun 21, 2024 at 09:25 Eric Berryman <eric.berry...@gmail.com> wrote: > That’s perfect > > https://github.com/apache/calcite/blob/main/cassandra/src/main/java/org/apache/calcite/adapter/cassandra/CassandraRules.java#L401 > > Thank you for such a quick response! > Eric > > > On Fri, Jun 21, 2024 at 09:14 Michael Mior <mm...@apache.org> wrote: > >> Eric, >> >> Could you give a more specific example of the failure scenario you're >> experiencing? >> >> For a simple example of how limits can be pushed down, this is done in the >> Cassandra adapter with CassandraLimitRule. It matches an EnumerableLimit >> on >> top of a CassandraToEnumerableConverter and then converts that limit to a >> CassandraLimit which passes along the limit and offset information to >> CassandraToEnumerableConverter for when the query is executed. The >> EnumerableLimit is then replaced with a CassandraLimit effectively as a >> placeholder to signal that the limit has been handled. >> >> -- >> Michael Mior >> mm...@apache.org >> >> >> On Fri, Jun 21, 2024 at 8:44 AM Eric Berryman <eric.berry...@gmail.com> >> wrote: >> >> > Hello! >> > >> > When I add limit to my relbuilder object, the planner gives up. But >> works >> > fine without it. >> > >> > I wasn’t able to find any examples of using limit and pushing the limit >> > values down to a data source. >> > >> > Could someone help with some links on this subject? >> > >> > Thank you! >> > Eric >> > >> >
