예제 #1
0
 private void combineParts(
     MultiMap<Part, ColumnKey> needed,
     MultiMap<ColumnKey, Part> classified,
     List<ExpressionNode> andexprs,
     List<Part> andparts) {
   Part p = needed.keySet().iterator().next();
   Collection<ColumnKey> missing = needed.get(p);
   if (missing == null || missing.isEmpty()) {
     andexprs.add((ExpressionNode) p.getParent());
     needed.remove(p);
     andparts.add(p);
     return;
   }
   ListSet<Part> containingMissing = new ListSet<Part>();
   boolean first = true;
   for (ColumnKey ck : missing) {
     Collection<Part> matching = classified.get(ck);
     if (matching == null || matching.isEmpty()) continue;
     if (first) containingMissing.addAll(matching);
     else {
       containingMissing.retainAll(matching);
     }
   }
   if (containingMissing.isEmpty()) {
     andexprs.add((ExpressionNode) p.getParent());
     andparts.add(p);
     needed.remove(p);
   } else {
     ListSet<Part> toCombine = new ListSet<Part>();
     toCombine.add(p);
     toCombine.addAll(containingMissing);
     ListSet<Part> toRemove = new ListSet<Part>();
     toRemove.addAll(toCombine);
     Part clhs = choosePartForAndCombo(toCombine);
     toCombine.remove(clhs);
     while (!toCombine.isEmpty()) {
       Part crhs = choosePartForAndCombo(toCombine);
       toCombine.remove(crhs);
       clhs = combineParts(clhs, crhs);
     }
     for (Part rp : toRemove) {
       needed.remove(rp);
       ArrayList<ColumnKey> classKeys = new ArrayList<ColumnKey>(classified.keySet());
       for (ColumnKey ck : classKeys) {
         Collection<Part> sub = classified.get(ck);
         if (sub == null || sub.isEmpty()) continue;
         if (sub.contains(rp)) classified.remove(ck, rp);
       }
     }
     andexprs.add((ExpressionNode) clhs.getParent());
     andparts.add(clhs);
   }
 }
 public static SelectStatement filterEntryProjection(SelectStatement in, PartitionEntry jre)
     throws PEException {
   PartitionEntry actual = jre.getActualEntry();
   SelectStatement expecting = null;
   if (actual instanceof OriginalPartitionEntry)
     expecting = ((OriginalPartitionEntry) actual).getChildCopy();
   else expecting = actual.getJoinQuery(null);
   ListSet<ColumnKey> ec = new ListSet<ColumnKey>();
   for (ExpressionNode en : expecting.getProjection()) {
     ExpressionNode targ = ExpressionUtils.getTarget(en);
     if (targ instanceof ColumnInstance) {
       ColumnKey was = ((ColumnInstance) targ).getColumnKey();
       ColumnKey isnow = in.getMapper().copyColumnKeyForward(was);
       if (isnow == null) {
         throw new SchemaException(Pass.PLANNER, "Lost column during lookup table join");
       }
       ec.add(isnow);
     } else if (targ instanceof FunctionCall) {
       ExpressionNode exn = targ;
       RewriteKey rk = in.getMapper().mapExpressionToColumn(exn);
       while (rk == null && (exn.getParent() instanceof ExpressionNode)) {
         exn = (ExpressionNode) exn.getParent();
         rk = in.getMapper().mapExpressionToColumn(exn);
       }
       if (rk != null) {
         ec.add((ColumnKey) rk);
       }
     }
   }
   for (Iterator<ExpressionNode> iter = in.getProjectionEdge().iterator(); iter.hasNext(); ) {
     ExpressionNode en = ExpressionUtils.getTarget(iter.next());
     if (en instanceof ColumnInstance) {
       ColumnKey ck = ((ColumnInstance) en).getColumnKey();
       if (!ec.contains(ck)) iter.remove();
     }
   }
   return in;
 }
예제 #3
0
 protected ListSet<Part> getCompletedParts() {
   if (stopped) return null;
   ListSet<Part> cols = new ListSet<Part>();
   for (Part p : completedParts) {
     if (p instanceof OredParts) cols.add(p);
   }
   completedParts.removeAll(cols);
   for (Part p : cols) {
     for (Part sp : p.getParts()) {
       completedParts.remove(sp);
     }
   }
   completedParts.addAll(cols);
   return completedParts;
 }
  // we have the temp table on the temp group for the constrained side
  // we need to build the bcast temp table on the pers group
  public static RedistFeatureStep buildLookupTableRedist(
      PlannerContext pc,
      PartitionEntry srcEntry,
      RedistFeatureStep constrainedOnTempGroup,
      JoinEntry rje,
      PEStorageGroup targetGroup,
      boolean indexJoinColumns)
      throws PEException {
    ProjectingFeatureStep selectDistinct =
        constrainedOnTempGroup.buildNewProjectingStep(
            pc,
            rje.getFeaturePlanner(),
            null,
            DMLExplainReason.LOOKUP_JOIN_LOOKUP_TABLE.makeRecord());
    SelectStatement ss = (SelectStatement) selectDistinct.getPlannedStatement();
    DistributionVector distVect =
        constrainedOnTempGroup.getTargetTempTable().getDistributionVector(pc.getContext());

    ListSet<ColumnKey> mappedColumnsInJoin = null;
    if (rje.getJoin().getJoin() != null) {
      ListSet<ColumnKey> columnsInJoin =
          ColumnInstanceCollector.getColumnKeys(
              ColumnInstanceCollector.getColumnInstances(rje.getJoin().getJoin().getJoinOn()));
      // build the set of columns in the src entry projection
      ListSet<ColumnKey> srcColumns = new ListSet<ColumnKey>();
      for (BufferEntry be : srcEntry.getBufferEntries()) {
        ExpressionNode targ = ExpressionUtils.getTarget(be.getTarget());
        if (targ instanceof ColumnInstance) {
          ColumnInstance ci = (ColumnInstance) targ;
          srcColumns.add(ci.getColumnKey());
        }
      }
      columnsInJoin.retainAll(srcColumns);
      mappedColumnsInJoin = new ListSet<ColumnKey>();
      for (ColumnKey ck : columnsInJoin) {
        mappedColumnsInJoin.add(ss.getMapper().copyColumnKeyForward(ck));
      }
    }

    for (Iterator<ExpressionNode> iter = ss.getProjectionEdge().iterator(); iter.hasNext(); ) {
      ExpressionNode en = iter.next();
      if (en instanceof ColumnInstance) {
        ColumnInstance ci = (ColumnInstance) en;
        PEColumn pec = ci.getPEColumn();
        if (!distVect.contains(srcEntry.getSchemaContext(), pec)
            && (mappedColumnsInJoin == null || !mappedColumnsInJoin.contains(ci.getColumnKey())))
          iter.remove();
      }
    }
    ss.setSetQuantifier(SetQuantifier.DISTINCT);
    ss.normalize(srcEntry.getSchemaContext());

    // now that we have the select distinct set up
    // redistribute it bcast back onto the pers group
    RedistFeatureStep out =
        selectDistinct.redist(
            pc,
            rje.getFeaturePlanner(),
            new TempTableCreateOptions(Model.BROADCAST, targetGroup),
            null,
            DMLExplainReason.LOOKUP_JOIN_LOOKUP_TABLE.makeRecord());

    if (indexJoinColumns)
      out.getTargetTempTable()
          .noteJoinedColumns(pc.getContext(), out.getTargetTempTable().getColumns(pc.getContext()));

    return out;
  }
예제 #5
0
 @Override
 public ListSet<Part> getParts() {
   ListSet<Part> me = new ListSet<Part>();
   me.add(this);
   return me;
 }
예제 #6
0
 private void setComplete(Part p) {
   p.setComplete();
   completedParts.add(p);
 }
예제 #7
0
 protected ListSet<ColumnKey> buildKeyColumns(TableKey tk, Collection<PEColumn> cols) {
   ListSet<ColumnKey> out = new ListSet<ColumnKey>();
   for (PEColumn c : cols) out.add(new ColumnKey(tk, c));
   return out;
 }