Hyoungjun Kim created TAJO-929:
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Summary: Broadcast join with empty outer join table returns empty
result.
Key: TAJO-929
URL: https://issues.apache.org/jira/browse/TAJO-929
Project: Tajo
Issue Type: Bug
Reporter: Hyoungjun Kim
Assignee: Hyoungjun Kim
Priority: Minor
The below query returns empty result. customer_parts table is partitioned table
by c_custkey column. Orders table is inner join and customer_parts is outer
join.
{code:sql}
select a.l_orderkey, b.o_orderkey, c.c_custkey from lineitem a
inner join orders b on a.l_orderkey = b.o_orderkey
left outer join customer_parts c on a.l_orderkey = c.c_custkey and c.c_custkey
< 0
{code}
Repartitioner class doesn't consider mixed join operator(inner and outer). In
the upper query case there is three scans stats. customer_parts's stat is zero
but customer_parts is outer join.
{code}
JoinNode joinNode = PlannerUtil.findMostBottomNode(execBlock.getPlan(),
NodeType.JOIN);
if (joinNode != null) {
if ( (joinNode.getJoinType() == JoinType.INNER)) {
for (int i = 0; i < stats.length; i++) {
if (stats[i] == 0) {
return;
}
}
}
}
{code}
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