Examples of com.salesforce.phoenix.query.KeyRange

com.salesforce.phoenix.query.KeyRange
Class that represents an upper/lower bound key range. @author jtaylor @since 0.1

                return DEGENERATE_KEY_PARTS;
            }
            // TODO: is there a case where we'd need to go through the childPart to calculate the key range?
            PColumn column = childSlot.getKeyPart().getColumn();
            PDataType type = column.getDataType();
            KeyRange keyRange = type.getKeyRange(key, true, ByteUtil.nextKey(key), false);
            Integer columnFixedLength = column.getByteSize();
            if (columnFixedLength != null) {
                keyRange = keyRange.fill(columnFixedLength);
            }
            // Only extract LIKE expression if pattern ends with a wildcard and everything else was extracted
            return newKeyParts(childSlot, node.endsWithOnlyWildcard() ? node : null, keyRange);
        }

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                                ByteUtil.copyKeyBytesIfNecessary(node.getMinKey()), true,
                                ByteUtil.copyKeyBytesIfNecessary(node.getMaxKey()), true)), null);
            }
            // Handles cases like WHERE substr(foo,1,3) IN ('aaa','bbb')
            for (Expression key : keyExpressions) {
                KeyRange range = childPart.getKeyRange(CompareOp.EQUAL, key);
                if (range != KeyRange.EMPTY_RANGE) { // null means it can't possibly be in range
                    if (mod != null) {
                        range = range.invert();
                    }
                    ranges.add(range);
                }
            }
            return newKeyParts(childSlot, node, ranges, null);

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            if (isFixedWidth) { // if column can't be null
                return node.isNegate() ? null : 
                    newKeyParts(childSlot, node, type.getKeyRange(new byte[column.getByteSize()], true,
                                                                  KeyRange.UNBOUND, true));
            } else {
                KeyRange keyRange = node.isNegate() ? KeyRange.IS_NOT_NULL_RANGE : KeyRange.IS_NULL_RANGE;
                return newKeyParts(childSlot, node, keyRange);
            }
        }

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    public KeyPart newKeyPart(final KeyPart childPart) {
        return new KeyPart() {


            @Override
            public KeyRange getKeyRange(CompareOp op, Expression rhs) {
                KeyRange range = childPart.getKeyRange(op, rhs);
                return range.invert();
            }


            @Override
            public List<Expression> getExtractNodes() {
                return childPart.getExtractNodes();

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            }


            @Override
            public KeyRange getKeyRange(CompareOp op, Expression rhs) {
                byte[] key;
                KeyRange range;
                PDataType type = getColumn().getDataType();
                switch (op) {
                case EQUAL:
                    key = evaluateExpression(rhs);
                    range = type.getKeyRange(key, true, ByteUtil.nextKey(key), false);
                    break;
                case GREATER:
                    key = evaluateExpression(rhs);
                    range = type.getKeyRange(ByteUtil.nextKey(key), true, KeyRange.UNBOUND, false);
                    break;
                case LESS_OR_EQUAL:
                    key = evaluateExpression(rhs);
                    range = type.getKeyRange(KeyRange.UNBOUND, false, ByteUtil.nextKey(key), false);
                    break;
                default:
                    return childPart.getKeyRange(op, rhs);
                }
                Integer length = getColumn().getByteSize();
                return length == null ? range : range.fill(length);
            }
        };
    }

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        do {
            length = ScanUtil.setKey(schema, ranges, position, Bound.LOWER, key, 1, 0, ranges.size(), 1);
            saltByte = SaltingUtil.getSaltingByte(key, 1, length, bucketNum);
            key[0] = saltByte;
            byte[] saltedKey = Arrays.copyOf(key, length + 1);
            KeyRange range = PDataType.VARBINARY.getKeyRange(saltedKey, true, saltedKey, true);
            expandedRanges[idx++] = range;
        } while (incrementKey(ranges, position));
        // The comparator is imperfect, but sufficient for all single keys.
        Arrays.sort(expandedRanges, KeyRange.COMPARATOR);
        List<KeyRange> expandedRangesList = Arrays.asList(expandedRanges);

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    }
    
    private void appendScanRow(StringBuilder buf, Bound bound) {
        ScanRanges scanRanges = context.getScanRanges();
        KeyRange minMaxRange = context.getMinMaxRange();
        Iterator<byte[]> minMaxIterator = Iterators.emptyIterator();
        if (minMaxRange != null) {
            RowKeySchema schema = tableRef.getTable().getRowKeySchema();
            if (!minMaxRange.isUnbound(bound)) {
                minMaxIterator = new RowKeyValueIterator(schema, minMaxRange.getRange(bound));
            }
        }
        int nRanges = scanRanges.getRanges().size();
        for (int i = 0, minPos = 0; minPos < nRanges || minMaxIterator.hasNext(); i++) {
            List<KeyRange> ranges = minPos >= nRanges ? EVERYTHING :  scanRanges.getRanges().get(minPos++);
            KeyRange range = bound == Bound.LOWER ? ranges.get(0) : ranges.get(ranges.size()-1);
            byte[] b = range.getRange(bound);
            Boolean isNull = KeyRange.IS_NULL_RANGE == range ? Boolean.TRUE : KeyRange.IS_NOT_NULL_RANGE == range ? Boolean.FALSE : null;
            if (minMaxIterator.hasNext()) {
                byte[] bMinMax = minMaxIterator.next();
                int cmp = Bytes.compareTo(bMinMax, b) * (bound == Bound.LOWER ? 1 : -1);
                if (cmp > 0) {

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        }
    }
    
    private void appendKeyRanges(StringBuilder buf) {
        ScanRanges scanRanges = context.getScanRanges();
        KeyRange minMaxRange = context.getMinMaxRange();
        if (minMaxRange == null && (scanRanges == ScanRanges.EVERYTHING || scanRanges == ScanRanges.NOTHING)) {
            return;
        }
        buf.append(" [");
        StringBuilder buf1 = new StringBuilder();

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                // Intersect with existing start/stop key if the table is salted
                // If not salted, we've already intersected it. If salted, we need
                // to wait until now to intersect, as we're running parallel scans
                // on all the possible regions here.
                if (tableRef.getTable().getBucketNum() != null) {
                    KeyRange minMaxRange = context.getMinMaxRange();
                    if (minMaxRange != null) {
                        // Add salt byte based on current split, as minMaxRange won't have it
                        minMaxRange = SaltingUtil.addSaltByte(split.getLowerRange(), minMaxRange);
                        split = split.intersect(minMaxRange);
                    }

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     * @return regions that intersect with the key range given by the startKey and stopKey
     */
    // exposed for tests
    public static List<HRegionLocation> filterRegions(List<HRegionLocation> allTableRegions, byte[] startKey, byte[] stopKey) {
        Iterable<HRegionLocation> regions;
        final KeyRange keyRange = KeyRange.getKeyRange(startKey, true, stopKey, false);
        if (keyRange == KeyRange.EVERYTHING_RANGE) {
            return allTableRegions;
        }
        
        regions = Iterables.filter(allTableRegions, new Predicate<HRegionLocation>() {
            @Override
            public boolean apply(HRegionLocation location) {
                KeyRange regionKeyRange = KeyRange.getKeyRange(location.getRegionInfo().getStartKey(), location.getRegionInfo().getEndKey());
                return keyRange.intersect(regionKeyRange) != KeyRange.EMPTY_RANGE;
            }
        });
        return Lists.newArrayList(regions);
    }

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