@Override
protected RegionScanner doPostScannerOpen(final ObserverContext<RegionCoprocessorEnvironment> c, final Scan scan, final RegionScanner s) throws IOException {
final TupleProjector p = TupleProjector.deserializeProjectorFromScan(scan);
final HashJoinInfo j = HashJoinInfo.deserializeHashJoinFromScan(scan);
RegionScanner theScanner = s;
if (p != null || j != null) {
theScanner = new HashJoinRegionScanner(s, p, j, ScanUtil.getTenantId(scan), c.getEnvironment());
}
final RegionScanner innerScanner = theScanner;
byte[] indexUUID = scan.getAttribute(PhoenixIndexCodec.INDEX_UUID);
PTable projectedTable = null;
List<Expression> selectExpressions = null;
byte[] upsertSelectTable = scan.getAttribute(BaseScannerRegionObserver.UPSERT_SELECT_TABLE);
boolean isUpsert = false;
boolean isDelete = false;
byte[] deleteCQ = null;
byte[] deleteCF = null;
byte[][] values = null;
byte[] emptyCF = null;
ImmutableBytesWritable ptr = null;
if (upsertSelectTable != null) {
isUpsert = true;
projectedTable = deserializeTable(upsertSelectTable);
selectExpressions = deserializeExpressions(scan.getAttribute(BaseScannerRegionObserver.UPSERT_SELECT_EXPRS));
values = new byte[projectedTable.getPKColumns().size()][];
ptr = new ImmutableBytesWritable();
} else {
byte[] isDeleteAgg = scan.getAttribute(BaseScannerRegionObserver.DELETE_AGG);
isDelete = isDeleteAgg != null && Bytes.compareTo(PDataType.TRUE_BYTES, isDeleteAgg) == 0;
if (!isDelete) {
deleteCF = scan.getAttribute(BaseScannerRegionObserver.DELETE_CF);
deleteCQ = scan.getAttribute(BaseScannerRegionObserver.DELETE_CQ);
}
emptyCF = scan.getAttribute(BaseScannerRegionObserver.EMPTY_CF);
}
int batchSize = 0;
long ts = scan.getTimeRange().getMax();
HRegion region = c.getEnvironment().getRegion();
List<Pair<Mutation,Integer>> mutations = Collections.emptyList();
if (isDelete || isUpsert || (deleteCQ != null && deleteCF != null) || emptyCF != null) {
// TODO: size better
mutations = Lists.newArrayListWithExpectedSize(1024);
batchSize = c.getEnvironment().getConfiguration().getInt(MUTATE_BATCH_SIZE_ATTRIB, QueryServicesOptions.DEFAULT_MUTATE_BATCH_SIZE);
}
Aggregators aggregators = ServerAggregators.deserialize(
scan.getAttribute(BaseScannerRegionObserver.AGGREGATORS), c.getEnvironment().getConfiguration());
Aggregator[] rowAggregators = aggregators.getAggregators();
boolean hasMore;
boolean hasAny = false;
MultiKeyValueTuple result = new MultiKeyValueTuple();
if (logger.isInfoEnabled()) {
logger.info("Starting ungrouped coprocessor scan " + scan);
}
long rowCount = 0;
MultiVersionConsistencyControl.setThreadReadPoint(innerScanner.getMvccReadPoint());
region.startRegionOperation();
try {
do {
List<KeyValue> results = new ArrayList<KeyValue>();
// Results are potentially returned even when the return value of s.next is false
// since this is an indication of whether or not there are more values after the
// ones returned
hasMore = innerScanner.nextRaw(results, null);
if (!results.isEmpty()) {
rowCount++;
result.setKeyValues(results);
try {
if (isDelete) {
@SuppressWarnings("deprecation") // FIXME: Remove when unintentionally deprecated method is fixed (HBASE-7870).
// FIXME: the version of the Delete constructor without the lock args was introduced
// in 0.94.4, thus if we try to use it here we can no longer use the 0.94.2 version
// of the client.
Delete delete = new Delete(results.get(0).getRow(),ts,null);
mutations.add(new Pair<Mutation,Integer>(delete,null));
} else if (isUpsert) {
Arrays.fill(values, null);
int i = 0;
List<PColumn> projectedColumns = projectedTable.getColumns();
for (; i < projectedTable.getPKColumns().size(); i++) {
Expression expression = selectExpressions.get(i);
if (expression.evaluate(result, ptr)) {
values[i] = ptr.copyBytes();
// If SortOrder from expression in SELECT doesn't match the
// column being projected into then invert the bits.
if (expression.getSortOrder() != projectedColumns.get(i).getSortOrder()) {
SortOrder.invert(values[i], 0, values[i], 0, values[i].length);
}
}
}
projectedTable.newKey(ptr, values);
PRow row = projectedTable.newRow(kvBuilder, ts, ptr);
for (; i < projectedColumns.size(); i++) {
Expression expression = selectExpressions.get(i);
if (expression.evaluate(result, ptr)) {
PColumn column = projectedColumns.get(i);
Object value = expression.getDataType().toObject(ptr, column.getSortOrder());
// We are guaranteed that the two column will have the same type.
if (!column.getDataType().isSizeCompatible(ptr, value, column.getDataType(),
expression.getMaxLength(), expression.getScale(),
column.getMaxLength(), column.getScale())) {
throw new ValueTypeIncompatibleException(column.getDataType(),
column.getMaxLength(), column.getScale());
}
column.getDataType().coerceBytes(ptr, value, expression.getDataType(),
expression.getMaxLength(), expression.getScale(), expression.getSortOrder(),
column.getMaxLength(), column.getScale(), column.getSortOrder());
byte[] bytes = ByteUtil.copyKeyBytesIfNecessary(ptr);
row.setValue(column, bytes);
}
}
for (Mutation mutation : row.toRowMutations()) {
mutations.add(new Pair<Mutation,Integer>(mutation,null));
}
} else if (deleteCF != null && deleteCQ != null) {
// No need to search for delete column, since we project only it
// if no empty key value is being set
if (emptyCF == null || result.getValue(deleteCF, deleteCQ) != null) {
Delete delete = new Delete(results.get(0).getRow());
delete.deleteColumns(deleteCF, deleteCQ, ts);
mutations.add(new Pair<Mutation,Integer>(delete,null));
}
}
if (emptyCF != null) {
/*
* If we've specified an emptyCF, then we need to insert an empty
* key value "retroactively" for any key value that is visible at
* the timestamp that the DDL was issued. Key values that are not
* visible at this timestamp will not ever be projected up to
* scans past this timestamp, so don't need to be considered.
* We insert one empty key value per row per timestamp.
*/
Set<Long> timeStamps = Sets.newHashSetWithExpectedSize(results.size());
for (KeyValue kv : results) {
long kvts = kv.getTimestamp();
if (!timeStamps.contains(kvts)) {
Put put = new Put(kv.getRow());
put.add(emptyCF, QueryConstants.EMPTY_COLUMN_BYTES, kvts, ByteUtil.EMPTY_BYTE_ARRAY);
mutations.add(new Pair<Mutation,Integer>(put,null));
}
}
}
// Commit in batches based on UPSERT_BATCH_SIZE_ATTRIB in config
if (!mutations.isEmpty() && batchSize > 0 && mutations.size() % batchSize == 0) {
commitBatch(region,mutations, indexUUID);
mutations.clear();
}
} catch (ConstraintViolationException e) {
// Log and ignore in count
logger.error("Failed to create row in " + region.getRegionNameAsString() + " with values " + SchemaUtil.toString(values), e);
continue;
}
aggregators.aggregate(rowAggregators, result);
hasAny = true;
}
} while (hasMore);
} finally {
innerScanner.close();
region.closeRegionOperation();
}
if (logger.isInfoEnabled()) {
logger.info("Finished scanning " + rowCount + " rows for ungrouped coprocessor scan " + scan);
}
if (!mutations.isEmpty()) {
commitBatch(region,mutations, indexUUID);
}
final boolean hadAny = hasAny;
KeyValue keyValue = null;
if (hadAny) {
byte[] value = aggregators.toBytes(rowAggregators);
keyValue = KeyValueUtil.newKeyValue(UNGROUPED_AGG_ROW_KEY, SINGLE_COLUMN_FAMILY, SINGLE_COLUMN, AGG_TIMESTAMP, value, 0, value.length);
}
final KeyValue aggKeyValue = keyValue;
RegionScanner scanner = new BaseRegionScanner() {
private boolean done = !hadAny;
@Override
public HRegionInfo getRegionInfo() {
return innerScanner.getRegionInfo();