I ran into IndexOfBoundsException from teiid query optimizer when running the following query:

select "SugarCRMDataSource_public_sales_location"."country" as "SugarCRMDataSource_public_sales_location_country",
"FoodmartDataSource_public_store"."store_country" as "FoodmartDataSource_public_store_store_country",
'1|1' as "JS_Discriminator_COL",
count(DISTINCT "SugarCRMDataSource_public_sales_fact"."amount") as "CountDistinct_SugarCRMDataSource_public_sales_fact_amount"
from "SugarCRMDataSource_public"."sales_fact" "SugarCRMDataSource_public_sales_fact"
inner join "SugarCRMDataSource_public"."sales_location" "SugarCRMDataSource_public_sales_location" on ("SugarCRMDataSource_public_sales_fact"."sales_location_id" = "SugarCRMDataSource_public_sales_location"."id")
inner join "FoodmartDataSource_public"."store" "FoodmartDataSource_public_store" on ("SugarCRMDataSource_public_sales_location"."state" = "FoodmartDataSource_public_store"."store_state")
group by "SugarCRMDataSource_public_sales_location"."country", "FoodmartDataSource_public_store"."store_country"

UNION ALL
select "SugarCRMDataSource_public_sales_location"."country" as "SugarCRMDataSource_public_sales_location_country",
NULL as "FoodmartDataSource_public_store_store_country",
'1|0' as "JS_Discriminator_COL",
count(DISTINCT "SugarCRMDataSource_public_sales_fact"."amount") as "CountDistinct_SugarCRMDataSource_public_sales_fact_amount"
from "SugarCRMDataSource_public"."sales_fact" "SugarCRMDataSource_public_sales_fact"
inner join "SugarCRMDataSource_public"."sales_location" "SugarCRMDataSource_public_sales_location" on ("SugarCRMDataSource_public_sales_fact"."sales_location_id" = "SugarCRMDataSource_public_sales_location"."id")
inner join "FoodmartDataSource_public"."store" "FoodmartDataSource_public_store" on ("SugarCRMDataSource_public_sales_location"."state" = "FoodmartDataSource_public_store"."store_state")
group by "SugarCRMDataSource_public_sales_location"."country"

UNION ALL
select NULL as "SugarCRMDataSource_public_sales_location_country",
"FoodmartDataSource_public_store"."store_country" as "FoodmartDataSource_public_store_store_country",
'0|1' as "JS_Discriminator_COL",
count(DISTINCT "SugarCRMDataSource_public_sales_fact"."amount") as "CountDistinct_SugarCRMDataSource_public_sales_fact_amount"
from "SugarCRMDataSource_public"."sales_fact" "SugarCRMDataSource_public_sales_fact"
inner join "SugarCRMDataSource_public"."sales_location" "SugarCRMDataSource_public_sales_location" on ("SugarCRMDataSource_public_sales_fact"."sales_location_id" = "SugarCRMDataSource_public_sales_location"."id")
inner join "FoodmartDataSource_public"."store" "FoodmartDataSource_public_store" on ("SugarCRMDataSource_public_sales_location"."state" = "FoodmartDataSource_public_store"."store_state")
group by "FoodmartDataSource_public_store"."store_country"

UNION ALL
select NULL as "SugarCRMDataSource_public_sales_location_country",
NULL as "FoodmartDataSource_public_store_store_country",
'0|0' as "JS_Discriminator_COL",
count(DISTINCT "SugarCRMDataSource_public_sales_fact"."amount") as "CountDistinct_SugarCRMDataSource_public_sales_fact_amount"
from "SugarCRMDataSource_public"."sales_fact" "SugarCRMDataSource_public_sales_fact"
inner join "SugarCRMDataSource_public"."sales_location" "SugarCRMDataSource_public_sales_location" on ("SugarCRMDataSource_public_sales_fact"."sales_location_id" = "SugarCRMDataSource_public_sales_location"."id")
inner join "FoodmartDataSource_public"."store" "FoodmartDataSource_public_store" on ("SugarCRMDataSource_public_sales_location"."state" = "FoodmartDataSource_public_store"."store_state")
order by "SugarCRMDataSource_public_sales_location_country", "FoodmartDataSource_public_store_store_country"
limit 1000

And here is the exception:

Caused by: java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
at java.util.ArrayList.rangeCheck(ArrayList.java:635)
at java.util.ArrayList.get(ArrayList.java:411)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.setColStatEstimates(NewCalculateCostUtil.java:411)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.setCardinalityEstimate(NewCalculateCostUtil.java:313)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.estimateSetOpCost(NewCalculateCostUtil.java:252)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.computeNodeCost(NewCalculateCostUtil.java:204)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.updateCardinality(NewCalculateCostUtil.java:136)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.updateCardinality(NewCalculateCostUtil.java:133)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.updateCardinality(NewCalculateCostUtil.java:133)
at org.teiid.query.optimizer.relational.rules.NewCalculateCostUtil.computeCostForTree(NewCalculateCostUtil.java:122)
at org.teiid.query.optimizer.relational.rules.RuleCalculateCost.execute(RuleCalculateCost.java:50)
at org.teiid.query.optimizer.relational.RelationalPlanner.executeRules(RelationalPlanner.java:807)
at org.teiid.query.optimizer.relational.RelationalPlanner.optimize(RelationalPlanner.java:223)
at org.teiid.query.optimizer.QueryOptimizer.optimizePlan(QueryOptimizer.java:159)
at org.teiid.dqp.internal.process.Request.generatePlan(Request.java:435)
at org.teiid.dqp.internal.process.PreparedStatementRequest.generatePlan(PreparedStatementRequest.java:119)
at org.teiid.dqp.internal.process.Request.processRequest(Request.java:463)
at org.teiid.dqp.internal.process.PreparedStatementRequest.processRequest(PreparedStatementRequest.java:294)
at org.teiid.dqp.internal.process.RequestWorkItem.processNew(RequestWorkItem.java:640)
at org.teiid.dqp.internal.process.RequestWorkItem.process(RequestWorkItem.java:337)
... 22 more