protected void doPushLimitIntoGroupScan(RelOptRuleCall call, LimitPrel limit, final ProjectPrel project, ScanPrel scan, GroupScan groupScan) { try { final GroupScan newGroupScan = getGroupScanWithLimit(groupScan, limit); if (newGroupScan == null) { return; } final ScanPrel newScan = new ScanPrel(scan.getCluster(), scan.getTraitSet(), newGroupScan, scan.getRowType(), scan.getTable()); final RelNode newChild; if (project != null) { final ProjectPrel newProject = new ProjectPrel(project.getCluster(), project.getTraitSet(), newScan, project.getProjects(), project.getRowType()); newChild = newProject; } else { newChild = newScan; } call.transformTo(newChild); logger.debug("pushLimitIntoGroupScan: Converted to a new ScanPrel " + newScan.getGroupScan()); } catch (Exception e) { logger.warn("pushLimitIntoGroupScan: Exception while trying limit pushdown!", e); } }
protected void doPushLimitIntoRowKeyJoin(RelOptRuleCall call, LimitPrel limit, final ProjectPrel project, RowKeyJoinPrel join) { final RelNode newChild; try { RelNode left = join.getLeft(); RelNode right = join.getRight(); final RelNode limitOnLeft = new LimitPrel(left.getCluster(), left.getTraitSet(), left, limit.getOffset(), limit.getFetch()); RowKeyJoinPrel newJoin = new RowKeyJoinPrel(join.getCluster(), join.getTraitSet(), limitOnLeft, right, join.getCondition(), join.getJoinType()); if (project != null) { final ProjectPrel newProject = new ProjectPrel(project.getCluster(), project.getTraitSet(), newJoin, project.getProjects(), project.getRowType()); newChild = newProject; } else { newChild = newJoin; } call.transformTo(newChild); logger.debug("pushLimitIntoRowKeyJoin: Pushed limit on left side of Join " + join.toString()); } catch (Exception e) { logger.warn("pushLimitIntoRowKeyJoin: Exception while trying limit pushdown!", e); } } }
newScan, newProjects, project.getRowType()); sameRowTypeProjectionsFields(project.getRowType(), newScan.getRowType())) { call.transformTo(newScan); } else {
@Override public void onMatch(RelOptRuleCall call) { final ProjectPrel project = call.rel(1); final LimitPrel limit = call.rel(0); RelNode child = project.getInput(); final RelNode limitUnderProject = new LimitPrel(child.getCluster(), child.getTraitSet(), child, limit.getOffset(), limit.getFetch()); final RelNode newProject = new ProjectPrel(project.getCluster(), project.getTraitSet(), limitUnderProject, project.getProjects(), project.getRowType()); if (DrillRelOptUtil.isProjectFlatten(project)) { //Preserve limit above the project since Flatten can produce more rows. Also mark it so we do not fire the rule again. child = newProject; final RelNode limitAboveProject = new LimitPrel(child.getCluster(), child.getTraitSet(), child, limit.getOffset(), limit.getFetch(), true); call.transformTo(limitAboveProject); } else { call.transformTo(newProject); } }
origRelDataTypes.add(project.getRowType().getFieldList().get(i)); i++; exprList.add(rex.accept(exprSplitter));
protected void doPushLimitIntoGroupScan(RelOptRuleCall call, LimitPrel limit, final ProjectPrel project, ScanPrel scan, GroupScan groupScan) { try { final GroupScan newGroupScan = getGroupScanWithLimit(groupScan, limit); if (newGroupScan == null) { return; } final ScanPrel newScan = new ScanPrel(scan.getCluster(), scan.getTraitSet(), newGroupScan, scan.getRowType(), scan.getTable()); final RelNode newChild; if (project != null) { final ProjectPrel newProject = new ProjectPrel(project.getCluster(), project.getTraitSet(), newScan, project.getProjects(), project.getRowType()); newChild = newProject; } else { newChild = newScan; } call.transformTo(newChild); logger.debug("pushLimitIntoGroupScan: Converted to a new ScanPrel " + newScan.getGroupScan()); } catch (Exception e) { logger.warn("pushLimitIntoGroupScan: Exception while trying limit pushdown!", e); } }
&& prel.getRowType().getFieldNames().size() > 1) { prefixedForStar = true; for (Pair<String, RexNode> pair : Pair.zip(prel.getRowType().getFieldNames(), prel.getProjects())) { if (pair.right instanceof RexInputRef) { String name = child.getRowType().getFieldNames().get(((RexInputRef) pair.right).getIndex());
relDataTypes.add(project.getRowType().getFieldList().get(i)); i++; exprList.add(newExpr);
protected void doPushLimitIntoRowKeyJoin(RelOptRuleCall call, LimitPrel limit, final ProjectPrel project, RowKeyJoinPrel join) { final RelNode newChild; try { RelNode left = join.getLeft(); RelNode right = join.getRight(); final RelNode limitOnLeft = new LimitPrel(left.getCluster(), left.getTraitSet(), left, limit.getOffset(), limit.getFetch()); RowKeyJoinPrel newJoin = new RowKeyJoinPrel(join.getCluster(), join.getTraitSet(), limitOnLeft, right, join.getCondition(), join.getJoinType()); if (project != null) { final ProjectPrel newProject = new ProjectPrel(project.getCluster(), project.getTraitSet(), newJoin, project.getProjects(), project.getRowType()); newChild = newProject; } else { newChild = newJoin; } call.transformTo(newChild); logger.debug("pushLimitIntoRowKeyJoin: Pushed limit on left side of Join " + join.toString()); } catch (Exception e) { logger.warn("pushLimitIntoRowKeyJoin: Exception while trying limit pushdown!", e); } } }
if (IndexPlanUtils.isCoveringIndex(indexContext, functionInfo)) { selector.addIndex(indexDesc, true, indexContext.lowerProject != null ? indexContext.lowerProject.getRowType().getFieldCount() : indexContext.scan.getRowType().getFieldCount());
newScan, newProjects, project.getRowType()); sameRowTypeProjectionsFields(project.getRowType(), newScan.getRowType())) { call.transformTo(newScan); } else {
@Override public void onMatch(RelOptRuleCall call) { final ProjectPrel project = call.rel(1); final LimitPrel limit = call.rel(0); RelNode child = project.getInput(); final RelNode limitUnderProject = new LimitPrel(child.getCluster(), child.getTraitSet(), child, limit.getOffset(), limit.getFetch()); final RelNode newProject = new ProjectPrel(project.getCluster(), project.getTraitSet(), limitUnderProject, project.getProjects(), project.getRowType()); if (DrillRelOptUtil.isProjectFlatten(project)) { //Preserve limit above the project since Flatten can produce more rows. Also mark it so we do not fire the rule again. child = newProject; final RelNode limitAboveProject = new LimitPrel(child.getCluster(), child.getTraitSet(), child, limit.getOffset(), limit.getFetch(), true); call.transformTo(limitAboveProject); } else { call.transformTo(newProject); } }
indexScanPrel, newProjects, newProject.getRowType());
indexFilterPrel, newProjects, newProject.getRowType());