/*
* This is the same as the setChildren method below but for empty tables.
* It takes care of the following:
* 1. Create the right object inspector.
* 2. Set up the childrenOpToOI with the object inspector.
* So as to ensure that the initialization happens correctly.
*/
public void initEmptyInputChildren(List<Operator<?>> children, Configuration hconf)
throws SerDeException, Exception {
setChildOperators(children);
for (Operator<?> child : children) {
TableScanOperator tsOp = (TableScanOperator) child;
StructObjectInspector soi = null;
PartitionDesc partDesc = conf.getAliasToPartnInfo().get(tsOp.getConf().getAlias());
Deserializer serde = partDesc.getTableDesc().getDeserializer();
partDesc.setProperties(partDesc.getProperties());
MapOpCtx opCtx = new MapOpCtx(tsOp.getConf().getAlias(), child, partDesc);
StructObjectInspector tableRowOI = (StructObjectInspector) serde.getObjectInspector();
initObjectInspector(hconf, opCtx, tableRowOI);
soi = opCtx.rowObjectInspector;
child.getParentOperators().add(this);
childrenOpToOI.put(child, soi);
}
}
