sachidananda007 commented on issue #13091:
URL: https://github.com/apache/druid/issues/13091#issuecomment-1251040396
i found this when checking the druid code hope this is helpful
In DruidPlanner.java -> plan()
we have 2 functions
planWithDruidConvention() -> this is for normal tables/datasources
planWithBindableConvention() -> this is for bindable tables i.e. metadata
table
> `SELECT LATEST(channel,10),cityName FROM "wikipedia" WHERE (comment IN(
'added project') ) and (comment NOT IN ('added project' )) GROUP BY cityName`
for the above query
In 0.21.1
- the plan fails in planWithDruidConvention() with the follwoing exception
and goes to planWithBindableConvention() as a fallback
- > org.apache.calcite.plan.RelOptPlanner$CannotPlanException: There are not
enough rules to produce a node with desired properties: convention=DRUID,
sort=[].
In 24.0
- I can see changes in decision path(`if (!bindableTables.isEmpty()) { }`).
- the plan goes to planWithDruidConvention() and it fails
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