[ASTERIXDB-2448] NullPointerException in IntroduceSelectAccessMethodRule with 2 indexes and between operator

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Component/s: COMP - Compiler
• Assignee: Dmitry Lychagin
• Reporter: Dmitry Lychagin
• Created: 30/Aug/18 02:00
• Updated: 31/Aug/18 20:20
• Resolved: 30/Aug/18 16:43

Description

NullPointerException is thrown when index intersection is chosen by the IntroduceSelectAccessMethodRule and there's a between operator.

DDL: 

create index idx_custkey on Orders (o_custkey) type btree;
create index idx_orderpriority on Orders (o_orderpriority) type btree;

Query:

select o_custkey, o_orderkey, o_orderstatus from Orders
where
o_orderpriority = '1-URGENT' and
o_custkey between 40 and 43
order by o_custkey, o_orderkey

Exception:

java.lang.NullPointerException: null
at org.apache.asterix.optimizer.rules.am.IntroduceSelectAccessMethodRule.connectAll2ndarySearchPlanWithIntersect(IntroduceSelectAccessMethodRule.java:264) ~[classes/:?]
at org.apache.asterix.optimizer.rules.am.IntroduceSelectAccessMethodRule.intersectAllSecondaryIndexes(IntroduceSelectAccessMethodRule.java:232) ~[classes/:?]

Workaround:

Use "<=" and ">=" instead of "between"