public static DrillProjectRel convert(Project project, ConversionContext context)
throws InvalidRelException {
RelNode input = context.toRel(project.getInput());
List<RelDataTypeField> fields = Lists.newArrayList();
List<RexNode> exps = Lists.newArrayList();
for (NamedExpression expr : project.getSelections()) {
fields.add(
new RelDataTypeFieldImpl(
expr.getRef().getRootSegment().getPath(),
fields.size(),
context.getTypeFactory().createSqlType(SqlTypeName.ANY)));
exps.add(context.toRex(expr.getExpr()));
}
return new DrillProjectRel(
context.getCluster(), context.getLogicalTraits(), input, exps, new RelRecordType(fields));
}
public static DrillScanRel convert(Scan scan, ConversionContext context) {
return new DrillScanRel(
context.getCluster(), context.getLogicalTraits(), context.getTable(scan));
}