Examples with ValueBitSet org.apache.phoenix.schema.ValueBitSet used on opensource projects

Example 1 with ValueBitSet

use of org.apache.phoenix.schema.ValueBitSet in project phoenix by apache.

the class ProjectionCompiler method compile.

/**
     * Builds the projection for the scan
     * @param context query context kept between compilation of different query clauses
     * @param statement TODO
     * @param groupBy compiled GROUP BY clause
     * @param targetColumns list of columns, parallel to aliasedNodes, that are being set for an
     * UPSERT SELECT statement. Used to coerce expression types to the expected target type.
     * @return projector used to access row values during scan
     * @throws SQLException 
     */
public static RowProjector compile(StatementContext context, SelectStatement statement, GroupBy groupBy, List<? extends PDatum> targetColumns, Expression where) throws SQLException {
    List<KeyValueColumnExpression> arrayKVRefs = new ArrayList<KeyValueColumnExpression>();
    List<ProjectedColumnExpression> arrayProjectedColumnRefs = new ArrayList<ProjectedColumnExpression>();
    List<Expression> arrayKVFuncs = new ArrayList<Expression>();
    List<Expression> arrayOldFuncs = new ArrayList<Expression>();
    Map<Expression, Integer> arrayExpressionCounts = new HashMap<>();
    List<AliasedNode> aliasedNodes = statement.getSelect();
    // Setup projected columns in Scan
    SelectClauseVisitor selectVisitor = new SelectClauseVisitor(context, groupBy, arrayKVRefs, arrayKVFuncs, arrayExpressionCounts, arrayProjectedColumnRefs, arrayOldFuncs, statement);
    List<ExpressionProjector> projectedColumns = new ArrayList<ExpressionProjector>();
    ColumnResolver resolver = context.getResolver();
    TableRef tableRef = context.getCurrentTable();
    PTable table = tableRef.getTable();
    boolean resolveColumn = !tableRef.equals(resolver.getTables().get(0));
    boolean isWildcard = false;
    Scan scan = context.getScan();
    int index = 0;
    List<Expression> projectedExpressions = Lists.newArrayListWithExpectedSize(aliasedNodes.size());
    List<byte[]> projectedFamilies = Lists.newArrayListWithExpectedSize(aliasedNodes.size());
    for (AliasedNode aliasedNode : aliasedNodes) {
        ParseNode node = aliasedNode.getNode();
        // TODO: visitor?
        if (node instanceof WildcardParseNode) {
            if (statement.isAggregate()) {
                ExpressionCompiler.throwNonAggExpressionInAggException(node.toString());
            }
            if (tableRef == TableRef.EMPTY_TABLE_REF) {
                throw new SQLExceptionInfo.Builder(SQLExceptionCode.NO_TABLE_SPECIFIED_FOR_WILDCARD_SELECT).build().buildException();
            }
            isWildcard = true;
            if (tableRef.getTable().getType() == PTableType.INDEX && ((WildcardParseNode) node).isRewrite()) {
                projectAllIndexColumns(context, tableRef, resolveColumn, projectedExpressions, projectedColumns, targetColumns);
            } else {
                projectAllTableColumns(context, tableRef, resolveColumn, projectedExpressions, projectedColumns, targetColumns);
            }
        } else if (node instanceof TableWildcardParseNode) {
            TableName tName = ((TableWildcardParseNode) node).getTableName();
            TableRef tRef = resolver.resolveTable(tName.getSchemaName(), tName.getTableName());
            if (tRef.equals(tableRef)) {
                isWildcard = true;
            }
            if (tRef.getTable().getType() == PTableType.INDEX && ((TableWildcardParseNode) node).isRewrite()) {
                projectAllIndexColumns(context, tRef, true, projectedExpressions, projectedColumns, targetColumns);
            } else {
                projectAllTableColumns(context, tRef, true, projectedExpressions, projectedColumns, targetColumns);
            }
        } else if (node instanceof FamilyWildcardParseNode) {
            if (tableRef == TableRef.EMPTY_TABLE_REF) {
                throw new SQLExceptionInfo.Builder(SQLExceptionCode.NO_TABLE_SPECIFIED_FOR_WILDCARD_SELECT).build().buildException();
            }
            // Project everything for SELECT cf.*
            String cfName = ((FamilyWildcardParseNode) node).getName();
            // Delay projecting to scan, as when any other column in the column family gets
            // added to the scan, it overwrites that we want to project the entire column
            // family. Instead, we do the projection at the end.
            // TODO: consider having a ScanUtil.addColumn and ScanUtil.addFamily to work
            // around this, as this code depends on this function being the last place where
            // columns are projected (which is currently true, but could change).
            projectedFamilies.add(Bytes.toBytes(cfName));
            if (tableRef.getTable().getType() == PTableType.INDEX && ((FamilyWildcardParseNode) node).isRewrite()) {
                projectIndexColumnFamily(context, cfName, tableRef, resolveColumn, projectedExpressions, projectedColumns);
            } else {
                projectTableColumnFamily(context, cfName, tableRef, resolveColumn, projectedExpressions, projectedColumns);
            }
        } else {
            Expression expression = node.accept(selectVisitor);
            projectedExpressions.add(expression);
            expression = coerceIfNecessary(index, targetColumns, expression);
            if (node instanceof BindParseNode) {
                context.getBindManager().addParamMetaData((BindParseNode) node, expression);
            }
            if (!node.isStateless()) {
                if (!selectVisitor.isAggregate() && statement.isAggregate()) {
                    ExpressionCompiler.throwNonAggExpressionInAggException(expression.toString());
                }
            }
            String columnAlias = aliasedNode.getAlias() != null ? aliasedNode.getAlias() : SchemaUtil.normalizeIdentifier(aliasedNode.getNode().getAlias());
            boolean isCaseSensitive = aliasedNode.getAlias() != null ? aliasedNode.isCaseSensitve() : (columnAlias != null ? SchemaUtil.isCaseSensitive(aliasedNode.getNode().getAlias()) : selectVisitor.isCaseSensitive);
            String name = columnAlias == null ? expression.toString() : columnAlias;
            projectedColumns.add(new ExpressionProjector(name, tableRef.getTableAlias() == null ? (table.getName() == null ? "" : table.getName().getString()) : tableRef.getTableAlias(), expression, isCaseSensitive));
        }
        selectVisitor.reset();
        index++;
    }
    for (int i = arrayProjectedColumnRefs.size() - 1; i >= 0; i--) {
        Expression expression = arrayProjectedColumnRefs.get(i);
        Integer count = arrayExpressionCounts.get(expression);
        if (count != 0) {
            arrayKVRefs.remove(i);
            arrayKVFuncs.remove(i);
            arrayOldFuncs.remove(i);
        }
    }
    if (arrayKVFuncs.size() > 0 && arrayKVRefs.size() > 0) {
        serailizeArrayIndexInformationAndSetInScan(context, arrayKVFuncs, arrayKVRefs);
        KeyValueSchemaBuilder builder = new KeyValueSchemaBuilder(0);
        for (Expression expression : arrayKVRefs) {
            builder.addField(expression);
        }
        KeyValueSchema kvSchema = builder.build();
        ValueBitSet arrayIndexesBitSet = ValueBitSet.newInstance(kvSchema);
        builder = new KeyValueSchemaBuilder(0);
        for (Expression expression : arrayKVFuncs) {
            builder.addField(expression);
        }
        KeyValueSchema arrayIndexesSchema = builder.build();
        Map<Expression, Expression> replacementMap = new HashMap<>();
        for (int i = 0; i < arrayOldFuncs.size(); i++) {
            Expression function = arrayKVFuncs.get(i);
            replacementMap.put(arrayOldFuncs.get(i), new ArrayIndexExpression(i, function.getDataType(), arrayIndexesBitSet, arrayIndexesSchema));
        }
        ReplaceArrayFunctionExpressionVisitor visitor = new ReplaceArrayFunctionExpressionVisitor(replacementMap);
        for (int i = 0; i < projectedColumns.size(); i++) {
            ExpressionProjector projector = projectedColumns.get(i);
            projectedColumns.set(i, new ExpressionProjector(projector.getName(), tableRef.getTableAlias() == null ? (table.getName() == null ? "" : table.getName().getString()) : tableRef.getTableAlias(), projector.getExpression().accept(visitor), projector.isCaseSensitive()));
        }
    }
    // TODO make estimatedByteSize more accurate by counting the joined columns.
    int estimatedKeySize = table.getRowKeySchema().getEstimatedValueLength();
    int estimatedByteSize = 0;
    for (Map.Entry<byte[], NavigableSet<byte[]>> entry : scan.getFamilyMap().entrySet()) {
        PColumnFamily family = table.getColumnFamily(entry.getKey());
        if (entry.getValue() == null) {
            for (PColumn column : family.getColumns()) {
                Integer maxLength = column.getMaxLength();
                int byteSize = column.getDataType().isFixedWidth() ? maxLength == null ? column.getDataType().getByteSize() : maxLength : RowKeySchema.ESTIMATED_VARIABLE_LENGTH_SIZE;
                estimatedByteSize += SizedUtil.KEY_VALUE_SIZE + estimatedKeySize + byteSize;
            }
        } else {
            for (byte[] cq : entry.getValue()) {
                //if (!Bytes.equals(cq, ByteUtil.EMPTY_BYTE_ARRAY) || cq.length > 0) {
                PColumn column = family.getPColumnForColumnQualifier(cq);
                Integer maxLength = column.getMaxLength();
                int byteSize = column.getDataType().isFixedWidth() ? maxLength == null ? column.getDataType().getByteSize() : maxLength : RowKeySchema.ESTIMATED_VARIABLE_LENGTH_SIZE;
                estimatedByteSize += SizedUtil.KEY_VALUE_SIZE + estimatedKeySize + byteSize;
            }
        //}
        }
    }
    boolean isProjectEmptyKeyValue = false;
    if (isWildcard) {
        projectAllColumnFamilies(table, scan);
    } else {
        isProjectEmptyKeyValue = where == null || LiteralExpression.isTrue(where) || where.requiresFinalEvaluation();
        for (byte[] family : projectedFamilies) {
            projectColumnFamily(table, scan, family);
        }
    }
    return new RowProjector(projectedColumns, estimatedByteSize, isProjectEmptyKeyValue, resolver.hasUDFs(), isWildcard);
}

Example 2 with ValueBitSet

use of org.apache.phoenix.schema.ValueBitSet in project phoenix by apache.

the class PhoenixRuntime method encodeColumnValues.

/**
     * 
     * @param conn connection that was used for reading/generating value.
     * @param fullTableName fully qualified table name
     * @param values values of the columns
     * @param columns list of pair of column that includes column family as first part and column name as the second part.
     * Column family is optional and hence nullable. Columns in the list have to be in the same order as the order of occurence
     * of their values in the object array.
     * @return values encoded in a byte array 
     * @throws SQLException
     * @see {@link #decodeValues(Connection, String, byte[], List)}
     */
public static byte[] encodeColumnValues(Connection conn, String fullTableName, Object[] values, List<Pair<String, String>> columns) throws SQLException {
    PTable table = getTable(conn, fullTableName);
    List<PColumn> pColumns = getColumns(table, columns);
    List<Expression> expressions = new ArrayList<Expression>(pColumns.size());
    int i = 0;
    for (PColumn col : pColumns) {
        Object value = values[i];
        // for purposes of encoding, sort order of the columns doesn't matter.
        Expression expr = LiteralExpression.newConstant(value, col.getDataType(), col.getMaxLength(), col.getScale());
        expressions.add(expr);
        i++;
    }
    KeyValueSchema kvSchema = buildKeyValueSchema(pColumns);
    ImmutableBytesWritable ptr = new ImmutableBytesWritable();
    ValueBitSet valueSet = ValueBitSet.newInstance(kvSchema);
    return kvSchema.toBytes(expressions.toArray(new Expression[0]), valueSet, ptr);
}

Example 3 with ValueBitSet

use of org.apache.phoenix.schema.ValueBitSet in project phoenix by apache.

the class PhoenixRuntime method decodeColumnValues.

/**
     * 
     * @param conn connection that was used for reading/generating value.
     * @param fullTableName fully qualified table name
     * @param value byte value of the columns concatenated as a single byte array. @see {@link #encodeColumnValues(Connection, String, Object[], List)}
     * @param columns list of column names for the columns that have their respective values
     * present in the byte array. The column names should be in the same order as their values are in the byte array.
     * The column name includes both family name, if present, and column name.
     * @return decoded values for each column
     * @throws SQLException
     * 
     */
public static Object[] decodeColumnValues(Connection conn, String fullTableName, byte[] value, List<Pair<String, String>> columns) throws SQLException {
    PTable table = getTable(conn, fullTableName);
    KeyValueSchema kvSchema = buildKeyValueSchema(getColumns(table, columns));
    ImmutableBytesWritable ptr = new ImmutableBytesWritable(value);
    ValueBitSet valueSet = ValueBitSet.newInstance(kvSchema);
    valueSet.clear();
    valueSet.or(ptr);
    int maxOffset = ptr.getOffset() + ptr.getLength();
    Boolean hasValue;
    kvSchema.iterator(ptr);
    int i = 0;
    List<Object> values = new ArrayList<Object>();
    while (hasValue = kvSchema.next(ptr, i, maxOffset, valueSet) != null) {
        if (hasValue) {
            values.add(kvSchema.getField(i).getDataType().toObject(ptr));
        }
        i++;
    }
    return values.toArray();
}

Example 4 with ValueBitSet

use of org.apache.phoenix.schema.ValueBitSet in project phoenix by apache.

the class RegionScannerFactory method getWrappedScanner.

/**
   * Return wrapped scanner that catches unexpected exceptions (i.e. Phoenix bugs) and
   * re-throws as DoNotRetryIOException to prevent needless retrying hanging the query
   * for 30 seconds. Unfortunately, until HBASE-7481 gets fixed, there's no way to do
   * the same from a custom filter.
   * @param arrayKVRefs
   * @param arrayFuncRefs
   * @param offset starting position in the rowkey.
   * @param scan
   * @param tupleProjector
   * @param dataRegion
   * @param indexMaintainer
   * @param tx current transaction
   * @param viewConstants
   */
public RegionScanner getWrappedScanner(final RegionCoprocessorEnvironment env, final RegionScanner s, final Set<KeyValueColumnExpression> arrayKVRefs, final Expression[] arrayFuncRefs, final int offset, final Scan scan, final ColumnReference[] dataColumns, final TupleProjector tupleProjector, final Region dataRegion, final IndexMaintainer indexMaintainer, Transaction tx, final byte[][] viewConstants, final KeyValueSchema kvSchema, final ValueBitSet kvSchemaBitSet, final TupleProjector projector, final ImmutableBytesWritable ptr, final boolean useQualifierAsListIndex) {
    return new RegionScanner() {

        private boolean hasReferences = checkForReferenceFiles();

        private HRegionInfo regionInfo = env.getRegionInfo();

        private byte[] actualStartKey = getActualStartKey();

        // If there are any reference files after local index region merge some cases we might
        // get the records less than scan start row key. This will happen when we replace the
        // actual region start key with merge region start key. This method gives whether are
        // there any reference files in the region or not.
        private boolean checkForReferenceFiles() {
            if (!ScanUtil.isLocalIndex(scan))
                return false;
            for (byte[] family : scan.getFamilies()) {
                if (getRegion().getStore(family).hasReferences()) {
                    return true;
                }
            }
            return false;
        }

        // Get the actual scan start row of local index. This will be used to compare the row
        // key of the results less than scan start row when there are references.
        public byte[] getActualStartKey() {
            return ScanUtil.isLocalIndex(scan) ? ScanUtil.getActualStartRow(scan, regionInfo) : null;
        }

        @Override
        public boolean next(List<Cell> results) throws IOException {
            try {
                return s.next(results);
            } catch (Throwable t) {
                ServerUtil.throwIOException(getRegion().getRegionInfo().getRegionNameAsString(), t);
                // impossible
                return false;
            }
        }

        @Override
        public boolean next(List<Cell> result, ScannerContext scannerContext) throws IOException {
            try {
                return s.next(result, scannerContext);
            } catch (Throwable t) {
                ServerUtil.throwIOException(getRegion().getRegionInfo().getRegionNameAsString(), t);
                // impossible
                return false;
            }
        }

        @Override
        public void close() throws IOException {
            s.close();
        }

        @Override
        public HRegionInfo getRegionInfo() {
            return s.getRegionInfo();
        }

        @Override
        public boolean isFilterDone() throws IOException {
            return s.isFilterDone();
        }

        @Override
        public boolean reseek(byte[] row) throws IOException {
            return s.reseek(row);
        }

        @Override
        public long getMvccReadPoint() {
            return s.getMvccReadPoint();
        }

        @Override
        public boolean nextRaw(List<Cell> result) throws IOException {
            try {
                boolean next = s.nextRaw(result);
                Cell arrayElementCell = null;
                if (result.size() == 0) {
                    return next;
                }
                if (arrayFuncRefs != null && arrayFuncRefs.length > 0 && arrayKVRefs.size() > 0) {
                    int arrayElementCellPosition = replaceArrayIndexElement(arrayKVRefs, arrayFuncRefs, result);
                    arrayElementCell = result.get(arrayElementCellPosition);
                }
                if (ScanUtil.isLocalIndex(scan) && !ScanUtil.isAnalyzeTable(scan)) {
                    if (hasReferences && actualStartKey != null) {
                        next = scanTillScanStartRow(s, arrayKVRefs, arrayFuncRefs, result, null, arrayElementCell);
                        if (result.isEmpty()) {
                            return next;
                        }
                    }
                    /* In the following, c is only used when data region is null.
            dataRegion will never be null in case of non-coprocessor call,
            therefore no need to refactor
             */
                    IndexUtil.wrapResultUsingOffset(env, result, offset, dataColumns, tupleProjector, dataRegion, indexMaintainer, viewConstants, ptr);
                }
                if (projector != null) {
                    Tuple toProject = useQualifierAsListIndex ? new PositionBasedResultTuple(result) : new ResultTuple(Result.create(result));
                    Tuple tuple = projector.projectResults(toProject, useNewValueColumnQualifier);
                    result.clear();
                    result.add(tuple.getValue(0));
                    if (arrayElementCell != null) {
                        result.add(arrayElementCell);
                    }
                }
                // There is a scanattribute set to retrieve the specific array element
                return next;
            } catch (Throwable t) {
                ServerUtil.throwIOException(getRegion().getRegionInfo().getRegionNameAsString(), t);
                // impossible
                return false;
            }
        }

        @Override
        public boolean nextRaw(List<Cell> result, ScannerContext scannerContext) throws IOException {
            try {
                boolean next = s.nextRaw(result, scannerContext);
                Cell arrayElementCell = null;
                if (result.size() == 0) {
                    return next;
                }
                if (arrayFuncRefs != null && arrayFuncRefs.length > 0 && arrayKVRefs.size() > 0) {
                    int arrayElementCellPosition = replaceArrayIndexElement(arrayKVRefs, arrayFuncRefs, result);
                    arrayElementCell = result.get(arrayElementCellPosition);
                }
                if ((offset > 0 || ScanUtil.isLocalIndex(scan)) && !ScanUtil.isAnalyzeTable(scan)) {
                    if (hasReferences && actualStartKey != null) {
                        next = scanTillScanStartRow(s, arrayKVRefs, arrayFuncRefs, result, scannerContext, arrayElementCell);
                        if (result.isEmpty()) {
                            return next;
                        }
                    }
                    /* In the following, c is only used when data region is null.
            dataRegion will never be null in case of non-coprocessor call,
            therefore no need to refactor
             */
                    IndexUtil.wrapResultUsingOffset(env, result, offset, dataColumns, tupleProjector, dataRegion, indexMaintainer, viewConstants, ptr);
                }
                if (projector != null) {
                    Tuple toProject = useQualifierAsListIndex ? new PositionBasedMultiKeyValueTuple(result) : new ResultTuple(Result.create(result));
                    Tuple tuple = projector.projectResults(toProject, useNewValueColumnQualifier);
                    result.clear();
                    result.add(tuple.getValue(0));
                    if (arrayElementCell != null)
                        result.add(arrayElementCell);
                }
                // There is a scanattribute set to retrieve the specific array element
                return next;
            } catch (Throwable t) {
                ServerUtil.throwIOException(getRegion().getRegionInfo().getRegionNameAsString(), t);
                // impossible
                return false;
            }
        }

        /**
       * When there is a merge in progress while scanning local indexes we might get the key values less than scan start row.
       * In that case we need to scan until get the row key more or  equal to scan start key.
       * TODO try to fix this case in LocalIndexStoreFileScanner when there is a merge.
       */
        private boolean scanTillScanStartRow(final RegionScanner s, final Set<KeyValueColumnExpression> arrayKVRefs, final Expression[] arrayFuncRefs, List<Cell> result, ScannerContext scannerContext, Cell arrayElementCell) throws IOException {
            boolean next = true;
            Cell firstCell = result.get(0);
            while (Bytes.compareTo(firstCell.getRowArray(), firstCell.getRowOffset(), firstCell.getRowLength(), actualStartKey, 0, actualStartKey.length) < 0) {
                result.clear();
                if (scannerContext == null) {
                    next = s.nextRaw(result);
                } else {
                    next = s.nextRaw(result, scannerContext);
                }
                if (result.isEmpty()) {
                    return next;
                }
                if (arrayFuncRefs != null && arrayFuncRefs.length > 0 && arrayKVRefs.size() > 0) {
                    int arrayElementCellPosition = replaceArrayIndexElement(arrayKVRefs, arrayFuncRefs, result);
                    arrayElementCell = result.get(arrayElementCellPosition);
                }
                firstCell = result.get(0);
            }
            return next;
        }

        private int replaceArrayIndexElement(final Set<KeyValueColumnExpression> arrayKVRefs, final Expression[] arrayFuncRefs, List<Cell> result) {
            // make a copy of the results array here, as we're modifying it below
            MultiKeyValueTuple tuple = new MultiKeyValueTuple(ImmutableList.copyOf(result));
            // The size of both the arrays would be same?
            // Using KeyValueSchema to set and retrieve the value
            // collect the first kv to get the row
            Cell rowKv = result.get(0);
            for (KeyValueColumnExpression kvExp : arrayKVRefs) {
                if (kvExp.evaluate(tuple, ptr)) {
                    ListIterator<Cell> itr = result.listIterator();
                    while (itr.hasNext()) {
                        Cell kv = itr.next();
                        if (Bytes.equals(kvExp.getColumnFamily(), 0, kvExp.getColumnFamily().length, kv.getFamilyArray(), kv.getFamilyOffset(), kv.getFamilyLength()) && Bytes.equals(kvExp.getColumnQualifier(), 0, kvExp.getColumnQualifier().length, kv.getQualifierArray(), kv.getQualifierOffset(), kv.getQualifierLength())) {
                            // remove the kv that has the full array values.
                            itr.remove();
                            break;
                        }
                    }
                }
            }
            byte[] value = kvSchema.toBytes(tuple, arrayFuncRefs, kvSchemaBitSet, ptr);
            // Add a dummy kv with the exact value of the array index
            result.add(new KeyValue(rowKv.getRowArray(), rowKv.getRowOffset(), rowKv.getRowLength(), QueryConstants.ARRAY_VALUE_COLUMN_FAMILY, 0, QueryConstants.ARRAY_VALUE_COLUMN_FAMILY.length, QueryConstants.ARRAY_VALUE_COLUMN_QUALIFIER, 0, QueryConstants.ARRAY_VALUE_COLUMN_QUALIFIER.length, HConstants.LATEST_TIMESTAMP, KeyValue.Type.codeToType(rowKv.getTypeByte()), value, 0, value.length));
            return result.size() - 1;
        }

        @Override
        public long getMaxResultSize() {
            return s.getMaxResultSize();
        }

        @Override
        public int getBatch() {
            return s.getBatch();
        }
    };
}

Example 5 with ValueBitSet

use of org.apache.phoenix.schema.ValueBitSet in project phoenix by apache.

the class PhoenixRuntime method encodeValues.

/**
     * 
     * @param conn connection that was used for reading/generating value.
     * @param fullTableName fully qualified table name
     * @param values values of the columns
     * @param columns list of pair of column that includes column family as first part and column name as the second part.
     * Column family is optional and hence nullable. Columns in the list have to be in the same order as the order of occurence
     * of their values in the object array.
     * @return values encoded in a byte array 
     * @throws SQLException
     * @see {@link #decodeValues(Connection, String, byte[], List)}
     */
@Deprecated
public static byte[] encodeValues(Connection conn, String fullTableName, Object[] values, List<Pair<String, String>> columns) throws SQLException {
    PTable table = getTable(conn, fullTableName);
    List<PColumn> pColumns = getPColumns(table, columns);
    List<Expression> expressions = new ArrayList<Expression>(pColumns.size());
    int i = 0;
    for (PColumn col : pColumns) {
        Object value = values[i];
        // for purposes of encoding, sort order of the columns doesn't matter.
        Expression expr = LiteralExpression.newConstant(value, col.getDataType(), col.getMaxLength(), col.getScale());
        expressions.add(expr);
        i++;
    }
    KeyValueSchema kvSchema = buildKeyValueSchema(pColumns);
    ImmutableBytesWritable ptr = new ImmutableBytesWritable();
    ValueBitSet valueSet = ValueBitSet.newInstance(kvSchema);
    return kvSchema.toBytes(expressions.toArray(new Expression[0]), valueSet, ptr);
}