public static ProjectedValueTuple mergeProjectedValue(
ProjectedValueTuple dest,
KeyValueSchema destSchema,
ValueBitSet destBitSet,
Tuple src,
KeyValueSchema srcSchema,
ValueBitSet srcBitSet,
int offset)
throws IOException {
ImmutableBytesWritable destValue = new ImmutableBytesWritable(dest.getProjectedValue());
destBitSet.clear();
destBitSet.or(destValue);
int origDestBitSetLen = dest.getBitSetLength();
ImmutableBytesWritable srcValue = new ImmutableBytesWritable();
decodeProjectedValue(src, srcValue);
srcBitSet.clear();
srcBitSet.or(srcValue);
int origSrcBitSetLen = srcBitSet.getEstimatedLength();
for (int i = 0; i < srcBitSet.getMaxSetBit(); i++) {
if (srcBitSet.get(i)) {
destBitSet.set(offset + i);
}
}
int destBitSetLen = destBitSet.getEstimatedLength();
byte[] merged =
new byte
[destValue.getLength()
- origDestBitSetLen
+ srcValue.getLength()
- origSrcBitSetLen
+ destBitSetLen];
int o =
Bytes.putBytes(
merged,
0,
destValue.get(),
destValue.getOffset(),
destValue.getLength() - origDestBitSetLen);
o =
Bytes.putBytes(
merged,
o,
srcValue.get(),
srcValue.getOffset(),
srcValue.getLength() - origSrcBitSetLen);
destBitSet.toBytes(merged, o);
ImmutableBytesWritable keyPtr = dest.getKeyPtr();
return new ProjectedValueTuple(
keyPtr.get(),
keyPtr.getOffset(),
keyPtr.getLength(),
dest.getTimestamp(),
merged,
destBitSetLen);
}
public BasicJoinIterator(ResultIterator lhsIterator, ResultIterator rhsIterator) {
this.lhsIterator = lhsIterator;
this.rhsIterator = rhsIterator;
this.initialized = false;
this.lhsTuple = null;
this.rhsTuple = null;
this.lhsKey = new JoinKey(lhsKeyExpressions);
this.rhsKey = new JoinKey(rhsKeyExpressions);
this.nextLhsTuple = null;
this.nextRhsTuple = null;
this.nextLhsKey = new JoinKey(lhsKeyExpressions);
this.nextRhsKey = new JoinKey(rhsKeyExpressions);
this.destBitSet = ValueBitSet.newInstance(joinedSchema);
this.lhsBitSet = ValueBitSet.newInstance(lhsSchema);
this.rhsBitSet = ValueBitSet.newInstance(rhsSchema);
lhsBitSet.clear();
int len = lhsBitSet.getEstimatedLength();
this.emptyProjectedValue = new byte[len];
lhsBitSet.toBytes(emptyProjectedValue, 0);
this.queue = new MappedByteBufferTupleQueue(thresholdBytes);
this.queueIterator = null;
}
private Tuple join(Tuple lhs, Tuple rhs) throws SQLException {
try {
ProjectedValueTuple t = null;
if (lhs == null) {
t =
new ProjectedValueTuple(
rhs,
rhs.getValue(0).getTimestamp(),
this.emptyProjectedValue,
0,
this.emptyProjectedValue.length,
this.emptyProjectedValue.length);
} else if (lhs instanceof ProjectedValueTuple) {
t = (ProjectedValueTuple) lhs;
} else {
ImmutableBytesWritable ptr = context.getTempPtr();
TupleProjector.decodeProjectedValue(lhs, ptr);
lhsBitSet.clear();
lhsBitSet.or(ptr);
int bitSetLen = lhsBitSet.getEstimatedLength();
t =
new ProjectedValueTuple(
lhs,
lhs.getValue(0).getTimestamp(),
ptr.get(),
ptr.getOffset(),
ptr.getLength(),
bitSetLen);
}
return rhsBitSet == ValueBitSet.EMPTY_VALUE_BITSET
? t
: TupleProjector.mergeProjectedValue(
t, joinedSchema, destBitSet, rhs, rhsSchema, rhsBitSet, rhsFieldPosition);
} catch (IOException e) {
throw new SQLException(e);
}
}