Package org.apache.drill.exec.planner.physical

Examples of org.apache.drill.exec.planner.physical.ScanPrel

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        return; // do nothing.
      }

      RelDataType scanRowType = getCountDirectScanRowType(agg.getCluster().getTypeFactory());

      final ScanPrel newScan = ScanPrel.create(scan,
          scan.getTraitSet().plus(Prel.DRILL_PHYSICAL).plus(DrillDistributionTrait.SINGLETON), getCountDirectScan(cnt),
          scanRowType);

      List<RexNode> exprs = Lists.newArrayList();
      exprs.add(RexInputRef.of(0, scanRowType));
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    super(RelOptHelper.some(FilterPrel.class, RelOptHelper.any(ScanPrel.class)), "HBasePushFilterIntoScan");
  }

  @Override
  public void onMatch(RelOptRuleCall call) {
    final ScanPrel scan = (ScanPrel) call.rel(1);
    final FilterPrel filter = (FilterPrel) call.rel(0);
    final RexNode condition = filter.getCondition();

    HBaseGroupScan groupScan = (HBaseGroupScan)scan.getGroupScan();
    if (groupScan.isFilterPushedDown()) {
      /*
       * The rule can get triggered again due to the transformed "scan => filter" sequence
       * created by the earlier execution of this rule when we could not do a complete
       * conversion of Optiq Filter's condition to HBase Filter. In such cases, we rely upon
       * this flag to not do a re-processing of the rule on the already transformed call.
       */
      return;
    }

    LogicalExpression conditionExp = DrillOptiq.toDrill(new DrillParseContext(), scan, condition);
    HBaseFilterBuilder hbaseFilterBuilder = new HBaseFilterBuilder(groupScan, conditionExp);
    HBaseScanSpec newScanSpec = hbaseFilterBuilder.parseTree();
    if (newScanSpec == null) {
      return; //no filter pushdown ==> No transformation.
    }

    final HBaseGroupScan newGroupsScan = new HBaseGroupScan(groupScan.getStoragePlugin(), newScanSpec, groupScan.getColumns());
    newGroupsScan.setFilterPushedDown(true);

    final ScanPrel newScanPrel = ScanPrel.create(scan, filter.getTraitSet(), newGroupsScan, scan.getRowType());
    if (hbaseFilterBuilder.isAllExpressionsConverted()) {
      /*
       * Since we could convert the entire filter condition expression into an HBase filter,
       * we can eliminate the filter operator altogether.
       */
 
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    }
  }

  @Override
  public boolean matches(RelOptRuleCall call) {
    final ScanPrel scan = (ScanPrel) call.rel(1);
    if (scan.getGroupScan() instanceof HBaseGroupScan) {
      return super.matches(call);
    }
    return false;
  }
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        "MongoPushDownFilterForScan");
  }

  @Override
  public void onMatch(RelOptRuleCall call) {
    final ScanPrel scan = (ScanPrel) call.rel(1);
    final FilterPrel filter = (FilterPrel) call.rel(0);
    final RexNode condition = filter.getCondition();

    MongoGroupScan groupScan = (MongoGroupScan) scan.getGroupScan();
    if (groupScan.isFilterPushedDown()) {
      return;
    }

    LogicalExpression conditionExp = DrillOptiq.toDrill(
        new DrillParseContext(), scan, condition);
    MongoFilterBuilder mongoFilterBuilder = new MongoFilterBuilder(groupScan,
        conditionExp);
    MongoScanSpec newScanSpec = mongoFilterBuilder.parseTree();
    if (newScanSpec == null) {
      return; // no filter pushdown so nothing to apply.
    }

    MongoGroupScan newGroupsScan = null;
    try {
      newGroupsScan = new MongoGroupScan(groupScan.getStoragePlugin(),
          newScanSpec, groupScan.getColumns());
    } catch (IOException e) {
      logger.error(e.getMessage(), e);
      throw new DrillRuntimeException(e.getMessage(), e);
    }
    newGroupsScan.setFilterPushedDown(true);

    final ScanPrel newScanPrel = ScanPrel.create(scan, filter.getTraitSet(),
        newGroupsScan, scan.getRowType());
    if (mongoFilterBuilder.isAllExpressionsConverted()) {
      /*
       * Since we could convert the entire filter condition expression into an
       * Mongo filter, we can eliminate the filter operator altogether.
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  }

  @Override
  public boolean matches(RelOptRuleCall call) {
    final ScanPrel scan = (ScanPrel) call.rel(1);
    if (scan.getGroupScan() instanceof MongoGroupScan) {
      return super.matches(call);
    }
    return false;
  }
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Related Classes of org.apache.drill.exec.planner.physical.ScanPrel

  • org.apache.drill.exec.physical.base.ScanStats
  • org.apache.drill.exec.planner.cost.DrillCostBase.DrillCostFactory
  • org.apache.drill.exec.planner.physical.ConvertCountToDirectScan
  • org.apache.drill.exec.store.hbase.HBasePushFilterIntoScan
  • org.apache.drill.exec.store.mongo.MongoPushDownFilterForScan
  • org.apache.drill.common.exceptions.DrillRuntimeException
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