@Override
public RelNode convert(RelNode rel) {
LogicalJoin join = (LogicalJoin) rel;
final List<RelNode> newInputs = new ArrayList<>();
for (RelNode input : join.getInputs()) {
if (!(input.getConvention() == getOutTrait())) {
input = convert(input, input.getTraitSet().replace(out));
}
newInputs.add(input);
}
if (!canJoinOnCondition(join.getCondition())) {
return null;
}
try {
return new JdbcJoin(
join.getCluster(),
join.getTraitSet().replace(out),
newInputs.get(0),
newInputs.get(1),
join.getCondition(),
join.getVariablesSet(),
join.getJoinType());
} catch (InvalidRelException e) {
LOGGER.fine(e.toString());
return null;
}
}
public RelNode convert(RelNode rel) {
final LogicalAggregate agg = (LogicalAggregate) rel;
if (agg.getGroupSets().size() != 1) {
// GROUPING SETS not supported; see
// [CALCITE-734] Push GROUPING SETS to underlying SQL via JDBC adapter
return null;
}
final RelTraitSet traitSet = agg.getTraitSet().replace(out);
try {
return new JdbcAggregate(
rel.getCluster(),
traitSet,
convert(agg.getInput(), out),
agg.indicator,
agg.getGroupSet(),
agg.getGroupSets(),
agg.getAggCallList());
} catch (InvalidRelException e) {
LOGGER.fine(e.toString());
return null;
}
}