public Result implement(EnumerableRelImplementor implementor, Prefer pref) {
logger.debug("implementing enumerable");
final DrillImplementor drillImplementor = new DrillImplementor(this.client == null);
DrillRel input = (DrillRel) getChild();
drillImplementor.go(input);
String plan = drillImplementor.getJsonString();
Hook.LOGICAL_PLAN.run(plan);
// not quite sure where this list was supposed to be set earlier, leaving it null got me back
// the full result set
final List<String> fieldNameList = rowType.getFieldNames();
// final List<String> fieldNameList = null;
BlockStatement expr =
new BlockBuilder()
.append(
Expressions.call(
OF_METHOD,
Expressions.constant(plan), //
Expressions.call(
Arrays.class,
"asList", //
Expressions.newArrayInit(
String.class, Functions.apply(fieldNameList, TO_LITERAL)) //
),
Expressions.constant(Object.class), //
Expressions.variable(DataContext.class, "root")))
.toBlock();
final PhysType physType =
PhysTypeImpl.of(
implementor.getTypeFactory(), getRowType(), pref.prefer(JavaRowFormat.ARRAY));
return new Result(expr, physType, JavaRowFormat.ARRAY);
}
@Override
public LogicalOperator implement(DrillImplementor implementor) {
LogicalOperator inputOp = implementor.visitChild(this, 0, getChild());
Project.Builder builder = Project.builder();
builder.setInput(inputOp);
for (NamedExpression e : this.getProjectExpressions(implementor.getContext())) {
builder.addExpr(e);
}
return builder.build();
}
@Override
public LogicalOperator implement(DrillImplementor implementor) {
Scan.Builder builder = Scan.builder();
builder.storageEngine(drillTable.getStorageEngineName());
builder.selection(new JSONOptions(drillTable.getSelection()));
implementor.registerSource(drillTable);
return builder.build();
}