Exemplo n.º 1
0
 /**
  * Check that none of no columns in our updatable VIEW are changing values.
  *
  * @param tableRef
  * @param overlapViewColumns
  * @param targetColumns
  * @param projector
  * @throws SQLException
  */
 private static void throwIfNotUpdatable(
     TableRef tableRef,
     Set<PColumn> overlapViewColumns,
     List<PColumn> targetColumns,
     RowProjector projector,
     boolean sameTable)
     throws SQLException {
   PTable table = tableRef.getTable();
   if (table.getViewType() == ViewType.UPDATABLE && !overlapViewColumns.isEmpty()) {
     ImmutableBytesWritable ptr = new ImmutableBytesWritable();
     for (int i = 0; i < targetColumns.size(); i++) {
       PColumn targetColumn = targetColumns.get(i);
       if (overlapViewColumns.contains(targetColumn)) {
         Expression source = projector.getColumnProjector(i).getExpression();
         if (source.isStateless()) {
           source.evaluate(null, ptr);
           if (Bytes.compareTo(
                   ptr.get(),
                   ptr.getOffset(),
                   ptr.getLength(),
                   targetColumn.getViewConstant(),
                   0,
                   targetColumn.getViewConstant().length - 1)
               == 0) {
             continue;
           }
         }
         throw new SQLExceptionInfo.Builder(SQLExceptionCode.CANNOT_UPDATE_VIEW_COLUMN)
             .setColumnName(targetColumn.getName().getString())
             .build()
             .buildException();
       }
     }
   }
 }
Exemplo n.º 2
0
  private static SelectStatement prependTenantAndViewConstants(
      PTable table, SelectStatement select, String tenantId, Set<PColumn> addViewColumns) {
    if ((!table.isMultiTenant() || tenantId == null)
        && table.getViewIndexId() == null
        && addViewColumns.isEmpty()) {
      return select;
    }
    List<AliasedNode> selectNodes =
        newArrayListWithCapacity(select.getSelect().size() + 1 + addViewColumns.size());
    if (table.isMultiTenant() && tenantId != null) {
      selectNodes.add(new AliasedNode(null, new LiteralParseNode(tenantId)));
    }
    if (table.getViewIndexId() != null) {
      selectNodes.add(new AliasedNode(null, new LiteralParseNode(table.getViewIndexId())));
    }
    selectNodes.addAll(select.getSelect());
    for (PColumn column : addViewColumns) {
      byte[] byteValue = column.getViewConstant();
      Object value = column.getDataType().toObject(byteValue, 0, byteValue.length - 1);
      selectNodes.add(new AliasedNode(null, new LiteralParseNode(value)));
    }

    return SelectStatement.create(select, selectNodes);
  }
Exemplo n.º 3
0
  public MutationPlan compile(UpsertStatement upsert) throws SQLException {
    final PhoenixConnection connection = statement.getConnection();
    ConnectionQueryServices services = connection.getQueryServices();
    final int maxSize =
        services
            .getProps()
            .getInt(
                QueryServices.MAX_MUTATION_SIZE_ATTRIB,
                QueryServicesOptions.DEFAULT_MAX_MUTATION_SIZE);
    final ColumnResolver resolver = FromCompiler.getResolverForMutation(upsert, connection);
    final TableRef tableRef = resolver.getTables().get(0);
    final PTable table = tableRef.getTable();
    if (table.getType() == PTableType.VIEW) {
      if (table.getViewType().isReadOnly()) {
        throw new ReadOnlyTableException(
            table.getSchemaName().getString(), table.getTableName().getString());
      }
    }
    boolean isSalted = table.getBucketNum() != null;
    final boolean isTenantSpecific = table.isMultiTenant() && connection.getTenantId() != null;
    final boolean isSharedViewIndex = table.getViewIndexId() != null;
    String tenantId = isTenantSpecific ? connection.getTenantId().getString() : null;
    int posOffset = isSalted ? 1 : 0;
    // Setup array of column indexes parallel to values that are going to be set
    List<ColumnName> columnNodes = upsert.getColumns();
    final List<PColumn> allColumns = table.getColumns();
    Set<PColumn> addViewColumnsToBe = Collections.emptySet();
    Set<PColumn> overlapViewColumnsToBe = Collections.emptySet();

    int[] columnIndexesToBe;
    int nColumnsToSet = 0;
    int[] pkSlotIndexesToBe;
    List<PColumn> targetColumns;
    if (table.getViewType() == ViewType.UPDATABLE) {
      addViewColumnsToBe = Sets.newLinkedHashSetWithExpectedSize(allColumns.size());
      for (PColumn column : allColumns) {
        if (column.getViewConstant() != null) {
          addViewColumnsToBe.add(column);
        }
      }
    }
    ImmutableBytesWritable ptr = new ImmutableBytesWritable();
    // Allow full row upsert if no columns or only dynamic ones are specified and values count match
    if (columnNodes.isEmpty()
        || columnNodes.size() == upsert.getTable().getDynamicColumns().size()) {
      nColumnsToSet = allColumns.size() - posOffset;
      columnIndexesToBe = new int[nColumnsToSet];
      pkSlotIndexesToBe = new int[columnIndexesToBe.length];
      targetColumns = Lists.newArrayListWithExpectedSize(columnIndexesToBe.length);
      targetColumns.addAll(Collections.<PColumn>nCopies(columnIndexesToBe.length, null));
      int minPKPos = 0;
      if (isTenantSpecific) {
        PColumn tenantColumn = table.getPKColumns().get(minPKPos);
        columnIndexesToBe[minPKPos] = tenantColumn.getPosition();
        targetColumns.set(minPKPos, tenantColumn);
        minPKPos++;
      }
      if (isSharedViewIndex) {
        PColumn indexIdColumn = table.getPKColumns().get(minPKPos);
        columnIndexesToBe[minPKPos] = indexIdColumn.getPosition();
        targetColumns.set(minPKPos, indexIdColumn);
        minPKPos++;
      }
      for (int i = posOffset, j = 0; i < allColumns.size(); i++) {
        PColumn column = allColumns.get(i);
        if (SchemaUtil.isPKColumn(column)) {
          pkSlotIndexesToBe[i - posOffset] = j + posOffset;
          if (j++ < minPKPos) { // Skip, as it's already been set above
            continue;
          }
          minPKPos = 0;
        }
        columnIndexesToBe[i - posOffset + minPKPos] = i;
        targetColumns.set(i - posOffset + minPKPos, column);
      }
      if (!addViewColumnsToBe.isEmpty()) {
        // All view columns overlap in this case
        overlapViewColumnsToBe = addViewColumnsToBe;
        addViewColumnsToBe = Collections.emptySet();
      }
    } else {
      // Size for worse case
      int numColsInUpsert = columnNodes.size();
      nColumnsToSet =
          numColsInUpsert
              + addViewColumnsToBe.size()
              + (isTenantSpecific ? 1 : 0)
              + +(isSharedViewIndex ? 1 : 0);
      columnIndexesToBe = new int[nColumnsToSet];
      pkSlotIndexesToBe = new int[columnIndexesToBe.length];
      targetColumns = Lists.newArrayListWithExpectedSize(columnIndexesToBe.length);
      targetColumns.addAll(Collections.<PColumn>nCopies(columnIndexesToBe.length, null));
      Arrays.fill(
          columnIndexesToBe,
          -1); // TODO: necessary? So we'll get an AIOB exception if it's not replaced
      Arrays.fill(
          pkSlotIndexesToBe,
          -1); // TODO: necessary? So we'll get an AIOB exception if it's not replaced
      BitSet pkColumnsSet = new BitSet(table.getPKColumns().size());
      int i = 0;
      // Add tenant column directly, as we don't want to resolve it as this will fail
      if (isTenantSpecific) {
        PColumn tenantColumn = table.getPKColumns().get(i + posOffset);
        columnIndexesToBe[i] = tenantColumn.getPosition();
        pkColumnsSet.set(pkSlotIndexesToBe[i] = i + posOffset);
        targetColumns.set(i, tenantColumn);
        i++;
      }
      if (isSharedViewIndex) {
        PColumn indexIdColumn = table.getPKColumns().get(i + posOffset);
        columnIndexesToBe[i] = indexIdColumn.getPosition();
        pkColumnsSet.set(pkSlotIndexesToBe[i] = i + posOffset);
        targetColumns.set(i, indexIdColumn);
        i++;
      }
      for (ColumnName colName : columnNodes) {
        ColumnRef ref =
            resolver.resolveColumn(null, colName.getFamilyName(), colName.getColumnName());
        PColumn column = ref.getColumn();
        if (IndexUtil.getViewConstantValue(column, ptr)) {
          if (overlapViewColumnsToBe.isEmpty()) {
            overlapViewColumnsToBe = Sets.newHashSetWithExpectedSize(addViewColumnsToBe.size());
          }
          nColumnsToSet--;
          overlapViewColumnsToBe.add(column);
          addViewColumnsToBe.remove(column);
        }
        columnIndexesToBe[i] = ref.getColumnPosition();
        targetColumns.set(i, column);
        if (SchemaUtil.isPKColumn(column)) {
          pkColumnsSet.set(pkSlotIndexesToBe[i] = ref.getPKSlotPosition());
        }
        i++;
      }
      for (PColumn column : addViewColumnsToBe) {
        columnIndexesToBe[i] = column.getPosition();
        targetColumns.set(i, column);
        if (SchemaUtil.isPKColumn(column)) {
          pkColumnsSet.set(pkSlotIndexesToBe[i] = SchemaUtil.getPKPosition(table, column));
        }
        i++;
      }
      for (i = posOffset; i < table.getPKColumns().size(); i++) {
        PColumn pkCol = table.getPKColumns().get(i);
        if (!pkColumnsSet.get(i)) {
          if (!pkCol.isNullable()) {
            throw new ConstraintViolationException(
                table.getName().getString()
                    + "."
                    + pkCol.getName().getString()
                    + " may not be null");
          }
        }
      }
    }

    List<ParseNode> valueNodes = upsert.getValues();
    QueryPlan plan = null;
    RowProjector rowProjectorToBe = null;
    final int nValuesToSet;
    boolean sameTable = false;
    boolean runOnServer = false;
    UpsertingParallelIteratorFactory upsertParallelIteratorFactoryToBe = null;
    final boolean isAutoCommit = connection.getAutoCommit();
    if (valueNodes == null) {
      SelectStatement select = upsert.getSelect();
      assert (select != null);
      select = SubselectRewriter.flatten(select, connection);
      ColumnResolver selectResolver = FromCompiler.getResolverForQuery(select, connection);
      select = StatementNormalizer.normalize(select, selectResolver);
      select = prependTenantAndViewConstants(table, select, tenantId, addViewColumnsToBe);
      sameTable =
          select.getFrom().size() == 1 && tableRef.equals(selectResolver.getTables().get(0));
      /* We can run the upsert in a coprocessor if:
       * 1) from has only 1 table and the into table matches from table
       * 2) the select query isn't doing aggregation
       * 3) autoCommit is on
       * 4) the table is not immutable, as the client is the one that figures out the additional
       *    puts for index tables.
       * 5) no limit clause
       * Otherwise, run the query to pull the data from the server
       * and populate the MutationState (upto a limit).
       */
      runOnServer =
          sameTable
              && isAutoCommit
              && !table.isImmutableRows()
              && !select.isAggregate()
              && !select.isDistinct()
              && select.getLimit() == null
              && table.getBucketNum() == null;
      ParallelIteratorFactory parallelIteratorFactory;
      if (select.isAggregate() || select.isDistinct() || select.getLimit() != null) {
        parallelIteratorFactory = null;
      } else {
        // We can pipeline the upsert select instead of spooling everything to disk first,
        // if we don't have any post processing that's required.
        parallelIteratorFactory =
            upsertParallelIteratorFactoryToBe =
                new UpsertingParallelIteratorFactory(connection, tableRef);
      }
      // If we may be able to run on the server, add a hint that favors using the data table
      // if all else is equal.
      // TODO: it'd be nice if we could figure out in advance if the PK is potentially changing,
      // as this would disallow running on the server. We currently use the row projector we
      // get back to figure this out.
      HintNode hint = upsert.getHint();
      if (!upsert.getHint().hasHint(Hint.USE_INDEX_OVER_DATA_TABLE)) {
        hint = HintNode.create(hint, Hint.USE_DATA_OVER_INDEX_TABLE);
      }
      select = SelectStatement.create(select, hint);
      // Pass scan through if same table in upsert and select so that projection is computed
      // correctly
      // Use optimizer to choose the best plan
      plan =
          new QueryOptimizer(services)
              .optimize(statement, select, selectResolver, targetColumns, parallelIteratorFactory);
      runOnServer &= plan.getTableRef().equals(tableRef);
      rowProjectorToBe = plan.getProjector();
      nValuesToSet = rowProjectorToBe.getColumnCount();
      // Cannot auto commit if doing aggregation or topN or salted
      // Salted causes problems because the row may end up living on a different region
    } else {
      nValuesToSet =
          valueNodes.size()
              + addViewColumnsToBe.size()
              + (isTenantSpecific ? 1 : 0)
              + (isSharedViewIndex ? 1 : 0);
    }
    final RowProjector projector = rowProjectorToBe;
    final UpsertingParallelIteratorFactory upsertParallelIteratorFactory =
        upsertParallelIteratorFactoryToBe;
    final QueryPlan queryPlan = plan;
    // Resize down to allow a subset of columns to be specifiable
    if (columnNodes.isEmpty() && columnIndexesToBe.length >= nValuesToSet) {
      nColumnsToSet = nValuesToSet;
      columnIndexesToBe = Arrays.copyOf(columnIndexesToBe, nValuesToSet);
      pkSlotIndexesToBe = Arrays.copyOf(pkSlotIndexesToBe, nValuesToSet);
    }

    if (nValuesToSet != nColumnsToSet) {
      throw new SQLExceptionInfo.Builder(SQLExceptionCode.UPSERT_COLUMN_NUMBERS_MISMATCH)
          .setMessage(
              "Numbers of columns: " + nColumnsToSet + ". Number of values: " + nValuesToSet)
          .build()
          .buildException();
    }

    final int[] columnIndexes = columnIndexesToBe;
    final int[] pkSlotIndexes = pkSlotIndexesToBe;
    final Set<PColumn> addViewColumns = addViewColumnsToBe;
    final Set<PColumn> overlapViewColumns = overlapViewColumnsToBe;

    // TODO: break this up into multiple functions
    ////////////////////////////////////////////////////////////////////
    // UPSERT SELECT
    /////////////////////////////////////////////////////////////////////
    if (valueNodes == null) {
      // Before we re-order, check that for updatable view columns
      // the projected expression either matches the column name or
      // is a constant with the same required value.
      throwIfNotUpdatable(tableRef, overlapViewColumnsToBe, targetColumns, projector, sameTable);

      ////////////////////////////////////////////////////////////////////
      // UPSERT SELECT run server-side (maybe)
      /////////////////////////////////////////////////////////////////////
      if (runOnServer) {
        // At most this array will grow bigger by the number of PK columns
        int[] allColumnsIndexes = Arrays.copyOf(columnIndexes, columnIndexes.length + nValuesToSet);
        int[] reverseColumnIndexes = new int[table.getColumns().size()];
        List<Expression> projectedExpressions =
            Lists.newArrayListWithExpectedSize(reverseColumnIndexes.length);
        Arrays.fill(reverseColumnIndexes, -1);
        for (int i = 0; i < nValuesToSet; i++) {
          projectedExpressions.add(projector.getColumnProjector(i).getExpression());
          reverseColumnIndexes[columnIndexes[i]] = i;
        }
        /*
         * Order projected columns and projected expressions with PK columns
         * leading order by slot position
         */
        int offset = table.getBucketNum() == null ? 0 : 1;
        for (int i = 0; i < table.getPKColumns().size() - offset; i++) {
          PColumn column = table.getPKColumns().get(i + offset);
          int pos = reverseColumnIndexes[column.getPosition()];
          if (pos == -1) {
            // Last PK column may be fixed width and nullable
            // We don't want to insert a null expression b/c
            // it's not valid to set a fixed width type to null.
            if (column.getDataType().isFixedWidth()) {
              continue;
            }
            // Add literal null for missing PK columns
            pos = projectedExpressions.size();
            Expression literalNull =
                LiteralExpression.newConstant(null, column.getDataType(), true);
            projectedExpressions.add(literalNull);
            allColumnsIndexes[pos] = column.getPosition();
          }
          // Swap select expression at pos with i
          Collections.swap(projectedExpressions, i, pos);
          // Swap column indexes and reverse column indexes too
          int tempPos = allColumnsIndexes[i];
          allColumnsIndexes[i] = allColumnsIndexes[pos];
          allColumnsIndexes[pos] = tempPos;
          reverseColumnIndexes[tempPos] = reverseColumnIndexes[i];
          reverseColumnIndexes[i] = i;
        }
        // If any pk slots are changing, be conservative and don't run this server side.
        // If the row ends up living in a different region, we'll get an error otherwise.
        for (int i = 0; i < table.getPKColumns().size(); i++) {
          PColumn column = table.getPKColumns().get(i);
          Expression source = projectedExpressions.get(i);
          if (source == null
              || !source.equals(
                  new ColumnRef(tableRef, column.getPosition()).newColumnExpression())) {
            // TODO: we could check the region boundaries to see if the pk will still be in it.
            runOnServer = false; // bail on running server side, since PK may be changing
            break;
          }
        }

        ////////////////////////////////////////////////////////////////////
        // UPSERT SELECT run server-side
        /////////////////////////////////////////////////////////////////////
        if (runOnServer) {
          // Iterate through columns being projected
          List<PColumn> projectedColumns =
              Lists.newArrayListWithExpectedSize(projectedExpressions.size());
          for (int i = 0; i < projectedExpressions.size(); i++) {
            // Must make new column if position has changed
            PColumn column = allColumns.get(allColumnsIndexes[i]);
            projectedColumns.add(column.getPosition() == i ? column : new PColumnImpl(column, i));
          }
          // Build table from projectedColumns
          PTable projectedTable = PTableImpl.makePTable(table, projectedColumns);

          SelectStatement select =
              SelectStatement.create(SelectStatement.COUNT_ONE, upsert.getHint());
          final RowProjector aggProjector =
              ProjectionCompiler.compile(queryPlan.getContext(), select, GroupBy.EMPTY_GROUP_BY);
          /*
           * Transfer over PTable representing subset of columns selected, but all PK columns.
           * Move columns setting PK first in pkSlot order, adding LiteralExpression of null for any missing ones.
           * Transfer over List<Expression> for projection.
           * In region scan, evaluate expressions in order, collecting first n columns for PK and collection non PK in mutation Map
           * Create the PRow and get the mutations, adding them to the batch
           */
          final StatementContext context = queryPlan.getContext();
          final Scan scan = context.getScan();
          scan.setAttribute(
              BaseScannerRegionObserver.UPSERT_SELECT_TABLE,
              UngroupedAggregateRegionObserver.serialize(projectedTable));
          scan.setAttribute(
              BaseScannerRegionObserver.UPSERT_SELECT_EXPRS,
              UngroupedAggregateRegionObserver.serialize(projectedExpressions));
          // Ignore order by - it has no impact
          final QueryPlan aggPlan =
              new AggregatePlan(
                  context,
                  select,
                  tableRef,
                  aggProjector,
                  null,
                  OrderBy.EMPTY_ORDER_BY,
                  null,
                  GroupBy.EMPTY_GROUP_BY,
                  null);
          return new MutationPlan() {

            @Override
            public PhoenixConnection getConnection() {
              return connection;
            }

            @Override
            public ParameterMetaData getParameterMetaData() {
              return queryPlan.getContext().getBindManager().getParameterMetaData();
            }

            @Override
            public StatementContext getContext() {
              return queryPlan.getContext();
            }

            @Override
            public MutationState execute() throws SQLException {
              ImmutableBytesWritable ptr = context.getTempPtr();
              tableRef.getTable().getIndexMaintainers(ptr);
              ServerCache cache = null;
              try {
                if (ptr.getLength() > 0) {
                  IndexMetaDataCacheClient client =
                      new IndexMetaDataCacheClient(connection, tableRef);
                  cache = client.addIndexMetadataCache(context.getScanRanges(), ptr);
                  byte[] uuidValue = cache.getId();
                  scan.setAttribute(PhoenixIndexCodec.INDEX_UUID, uuidValue);
                }
                ResultIterator iterator = aggPlan.iterator();
                try {
                  Tuple row = iterator.next();
                  final long mutationCount =
                      (Long) aggProjector.getColumnProjector(0).getValue(row, PDataType.LONG, ptr);
                  return new MutationState(maxSize, connection) {
                    @Override
                    public long getUpdateCount() {
                      return mutationCount;
                    }
                  };
                } finally {
                  iterator.close();
                }
              } finally {
                if (cache != null) {
                  cache.close();
                }
              }
            }

            @Override
            public ExplainPlan getExplainPlan() throws SQLException {
              List<String> queryPlanSteps = aggPlan.getExplainPlan().getPlanSteps();
              List<String> planSteps =
                  Lists.newArrayListWithExpectedSize(queryPlanSteps.size() + 1);
              planSteps.add("UPSERT ROWS");
              planSteps.addAll(queryPlanSteps);
              return new ExplainPlan(planSteps);
            }
          };
        }
      }

      ////////////////////////////////////////////////////////////////////
      // UPSERT SELECT run client-side
      /////////////////////////////////////////////////////////////////////
      return new MutationPlan() {

        @Override
        public PhoenixConnection getConnection() {
          return connection;
        }

        @Override
        public ParameterMetaData getParameterMetaData() {
          return queryPlan.getContext().getBindManager().getParameterMetaData();
        }

        @Override
        public StatementContext getContext() {
          return queryPlan.getContext();
        }

        @Override
        public MutationState execute() throws SQLException {
          ResultIterator iterator = queryPlan.iterator();
          if (upsertParallelIteratorFactory == null) {
            return upsertSelect(
                statement, tableRef, projector, iterator, columnIndexes, pkSlotIndexes);
          }
          upsertParallelIteratorFactory.setRowProjector(projector);
          upsertParallelIteratorFactory.setColumnIndexes(columnIndexes);
          upsertParallelIteratorFactory.setPkSlotIndexes(pkSlotIndexes);
          Tuple tuple;
          long totalRowCount = 0;
          while ((tuple = iterator.next()) != null) { // Runs query
            Cell kv = tuple.getValue(0);
            totalRowCount +=
                PDataType.LONG
                    .getCodec()
                    .decodeLong(kv.getValueArray(), kv.getValueOffset(), SortOrder.getDefault());
          }
          // Return total number of rows that have been updated. In the case of auto commit being
          // off
          // the mutations will all be in the mutation state of the current connection.
          return new MutationState(maxSize, statement.getConnection(), totalRowCount);
        }

        @Override
        public ExplainPlan getExplainPlan() throws SQLException {
          List<String> queryPlanSteps = queryPlan.getExplainPlan().getPlanSteps();
          List<String> planSteps = Lists.newArrayListWithExpectedSize(queryPlanSteps.size() + 1);
          planSteps.add("UPSERT SELECT");
          planSteps.addAll(queryPlanSteps);
          return new ExplainPlan(planSteps);
        }
      };
    }

    ////////////////////////////////////////////////////////////////////
    // UPSERT VALUES
    /////////////////////////////////////////////////////////////////////
    int nodeIndex = 0;
    // initialze values with constant byte values first
    final byte[][] values = new byte[nValuesToSet][];
    if (isTenantSpecific) {
      values[nodeIndex++] = connection.getTenantId().getBytes();
    }
    if (isSharedViewIndex) {
      values[nodeIndex++] = MetaDataUtil.getViewIndexIdDataType().toBytes(table.getViewIndexId());
    }
    final int nodeIndexOffset = nodeIndex;
    // Allocate array based on size of all columns in table,
    // since some values may not be set (if they're nullable).
    final StatementContext context = new StatementContext(statement, resolver, new Scan());
    UpsertValuesCompiler expressionBuilder = new UpsertValuesCompiler(context);
    final List<Expression> constantExpressions =
        Lists.newArrayListWithExpectedSize(valueNodes.size());
    // First build all the expressions, as with sequences we want to collect them all first
    // and initialize them in one batch
    for (ParseNode valueNode : valueNodes) {
      if (!valueNode.isStateless()) {
        throw new SQLExceptionInfo.Builder(SQLExceptionCode.VALUE_IN_UPSERT_NOT_CONSTANT)
            .build()
            .buildException();
      }
      PColumn column = allColumns.get(columnIndexes[nodeIndex]);
      expressionBuilder.setColumn(column);
      Expression expression = valueNode.accept(expressionBuilder);
      if (expression.getDataType() != null
          && !expression.getDataType().isCastableTo(column.getDataType())) {
        throw TypeMismatchException.newException(
            expression.getDataType(),
            column.getDataType(),
            "expression: " + expression.toString() + " in column " + column);
      }
      constantExpressions.add(expression);
      nodeIndex++;
    }
    return new MutationPlan() {

      @Override
      public PhoenixConnection getConnection() {
        return connection;
      }

      @Override
      public ParameterMetaData getParameterMetaData() {
        return context.getBindManager().getParameterMetaData();
      }

      @Override
      public StatementContext getContext() {
        return context;
      }

      @Override
      public MutationState execute() throws SQLException {
        ImmutableBytesWritable ptr = context.getTempPtr();
        final SequenceManager sequenceManager = context.getSequenceManager();
        // Next evaluate all the expressions
        int nodeIndex = nodeIndexOffset;
        Tuple tuple =
            sequenceManager.getSequenceCount() == 0 ? null : sequenceManager.newSequenceTuple(null);
        for (Expression constantExpression : constantExpressions) {
          PColumn column = allColumns.get(columnIndexes[nodeIndex]);
          constantExpression.evaluate(tuple, ptr);
          Object value = null;
          if (constantExpression.getDataType() != null) {
            value =
                constantExpression
                    .getDataType()
                    .toObject(
                        ptr,
                        constantExpression.getSortOrder(),
                        constantExpression.getMaxLength(),
                        constantExpression.getScale());
            if (!constantExpression.getDataType().isCoercibleTo(column.getDataType(), value)) {
              throw TypeMismatchException.newException(
                  constantExpression.getDataType(),
                  column.getDataType(),
                  "expression: " + constantExpression.toString() + " in column " + column);
            }
            if (!column
                .getDataType()
                .isSizeCompatible(
                    ptr,
                    value,
                    constantExpression.getDataType(),
                    constantExpression.getMaxLength(),
                    constantExpression.getScale(),
                    column.getMaxLength(),
                    column.getScale())) {
              throw new SQLExceptionInfo.Builder(SQLExceptionCode.DATA_EXCEEDS_MAX_CAPACITY)
                  .setColumnName(column.getName().getString())
                  .setMessage("value=" + constantExpression.toString())
                  .build()
                  .buildException();
            }
          }
          column
              .getDataType()
              .coerceBytes(
                  ptr,
                  value,
                  constantExpression.getDataType(),
                  constantExpression.getMaxLength(),
                  constantExpression.getScale(),
                  constantExpression.getSortOrder(),
                  column.getMaxLength(),
                  column.getScale(),
                  column.getSortOrder());
          if (overlapViewColumns.contains(column)
              && Bytes.compareTo(
                      ptr.get(),
                      ptr.getOffset(),
                      ptr.getLength(),
                      column.getViewConstant(),
                      0,
                      column.getViewConstant().length - 1)
                  != 0) {
            throw new SQLExceptionInfo.Builder(SQLExceptionCode.CANNOT_UPDATE_VIEW_COLUMN)
                .setColumnName(column.getName().getString())
                .setMessage("value=" + constantExpression.toString())
                .build()
                .buildException();
          }
          values[nodeIndex] = ByteUtil.copyKeyBytesIfNecessary(ptr);
          nodeIndex++;
        }
        // Add columns based on view
        for (PColumn column : addViewColumns) {
          if (IndexUtil.getViewConstantValue(column, ptr)) {
            values[nodeIndex++] = ByteUtil.copyKeyBytesIfNecessary(ptr);
          } else {
            throw new IllegalStateException();
          }
        }
        Map<ImmutableBytesPtr, Map<PColumn, byte[]>> mutation = Maps.newHashMapWithExpectedSize(1);
        setValues(values, pkSlotIndexes, columnIndexes, tableRef.getTable(), mutation);
        return new MutationState(tableRef, mutation, 0, maxSize, connection);
      }

      @Override
      public ExplainPlan getExplainPlan() throws SQLException {
        List<String> planSteps = Lists.newArrayListWithExpectedSize(2);
        if (context.getSequenceManager().getSequenceCount() > 0) {
          planSteps.add(
              "CLIENT RESERVE " + context.getSequenceManager().getSequenceCount() + " SEQUENCES");
        }
        planSteps.add("PUT SINGLE ROW");
        return new ExplainPlan(planSteps);
      }
    };
  }
Exemplo n.º 4
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  /**
   * Order the plans among all the possible ones from best to worst. Since we don't keep stats yet,
   * we use the following simple algorithm: 1) If the query is a point lookup (i.e. we have a set of
   * exact row keys), choose among those. 2) If the query has an ORDER BY and a LIMIT, choose the
   * plan that has all the ORDER BY expression in the same order as the row key columns. 3) If there
   * are more than one plan that meets (1&2), choose the plan with: a) the most row key columns that
   * may be used to form the start/stop scan key. b) the plan that preserves ordering for a group
   * by. c) the data table plan
   *
   * @param plans the list of candidate plans
   * @return list of plans ordered from best to worst.
   */
  private List<QueryPlan> orderPlansBestToWorst(
      SelectStatement select, List<QueryPlan> plans, boolean stopAtBestPlan) {
    final QueryPlan dataPlan = plans.get(0);
    if (plans.size() == 1) {
      return plans;
    }

    /**
     * If we have a plan(s) that are just point lookups (i.e. fully qualified row keys), then favor
     * those first.
     */
    List<QueryPlan> candidates = Lists.newArrayListWithExpectedSize(plans.size());
    if (stopAtBestPlan) { // If we're stopping at the best plan, only consider point lookups if
      // there are any
      for (QueryPlan plan : plans) {
        if (plan.getContext().getScanRanges().isPointLookup()) {
          candidates.add(plan);
        }
      }
    } else {
      candidates.addAll(plans);
    }
    /**
     * If we have a plan(s) that removes the order by, choose from among these, as this is typically
     * the most expensive operation. Once we have stats, if there's a limit on the query, we might
     * choose a different plan. For example if the limit was a very large number and the combination
     * of applying other filters on the row key are estimated to choose fewer rows, we'd choose that
     * one.
     */
    List<QueryPlan> stillCandidates = plans;
    List<QueryPlan> bestCandidates = candidates;
    if (!candidates.isEmpty()) {
      stillCandidates = candidates;
      bestCandidates = Lists.<QueryPlan>newArrayListWithExpectedSize(candidates.size());
    }
    for (QueryPlan plan : stillCandidates) {
      // If ORDER BY optimized out (or not present at all)
      if (plan.getOrderBy().getOrderByExpressions().isEmpty()) {
        bestCandidates.add(plan);
      }
    }
    if (bestCandidates.isEmpty()) {
      bestCandidates.addAll(stillCandidates);
    }

    int nViewConstants = 0;
    PTable dataTable = dataPlan.getTableRef().getTable();
    if (dataTable.getType() == PTableType.VIEW) {
      for (PColumn column : dataTable.getColumns()) {
        if (column.getViewConstant() != null) {
          nViewConstants++;
        }
      }
    }
    final int boundRanges = nViewConstants;
    final int comparisonOfDataVersusIndexTable =
        select.getHint().hasHint(Hint.USE_DATA_OVER_INDEX_TABLE) ? -1 : 1;
    Collections.sort(
        bestCandidates,
        new Comparator<QueryPlan>() {

          @Override
          public int compare(QueryPlan plan1, QueryPlan plan2) {
            PTable table1 = plan1.getTableRef().getTable();
            PTable table2 = plan2.getTableRef().getTable();
            // For shared indexes (i.e. indexes on views and local indexes),
            // a) add back any view constants as these won't be in the index, and
            // b) ignore the viewIndexId which will be part of the row key columns.
            int c =
                (plan2.getContext().getScanRanges().getBoundPkColumnCount()
                        + (table2.getViewIndexId() == null ? 0 : (boundRanges - 1)))
                    - (plan1.getContext().getScanRanges().getBoundPkColumnCount()
                        + (table1.getViewIndexId() == null ? 0 : (boundRanges - 1)));
            if (c != 0) return c;
            if (plan1.getGroupBy() != null && plan2.getGroupBy() != null) {
              if (plan1.getGroupBy().isOrderPreserving()
                  != plan2.getGroupBy().isOrderPreserving()) {
                return plan1.getGroupBy().isOrderPreserving() ? -1 : 1;
              }
            }
            // Use smaller table (table with fewest kv columns)
            c =
                (table1.getColumns().size() - table1.getPKColumns().size())
                    - (table2.getColumns().size() - table2.getPKColumns().size());
            if (c != 0) return c;

            // If all things are equal, don't choose local index as it forces scan
            // on every region (unless there's no start/stop key)
            if (table1.getIndexType() == IndexType.LOCAL) {
              return plan1.getContext().getScanRanges().getRanges().isEmpty() ? -1 : 1;
            }
            if (table2.getIndexType() == IndexType.LOCAL) {
              return plan2.getContext().getScanRanges().getRanges().isEmpty() ? 1 : -1;
            }

            // All things being equal, just use the table based on the
            // Hint.USE_DATA_OVER_INDEX_TABLE
            if (table1.getType() == PTableType.INDEX) {
              return comparisonOfDataVersusIndexTable;
            }
            if (table2.getType() == PTableType.INDEX) {
              return -comparisonOfDataVersusIndexTable;
            }

            return 0;
          }
        });

    return bestCandidates;
  }