mustafaiman commented on a change in pull request #1352:
URL: https://github.com/apache/hive/pull/1352#discussion_r464532531
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/exec/vector/wrapper/VectorHashKeyWrapperGeneral.java
##########
@@ -262,6 +255,138 @@ private void duplicateTo(VectorHashKeyWrapperGeneral
clone) {
clone.hashcode = hashcode;
assert clone.equals(this);
+
+ return clone;
+ }
+
+ private long[] copyInPlaceOrAllocate(long[] from, long[] to) {
+ if (from.length > 0) {
+ if (to != null && to.length == from.length) {
+ System.arraycopy(from, 0, to, 0, from.length);
+ return to;
+ } else {
+ return from.clone();
+ }
+ } else {
+ return EMPTY_LONG_ARRAY;
+ }
+ }
+
+ private double[] copyInPlaceOrAllocate(double[] from, double[] to) {
+ if (from.length > 0) {
+ if (to != null && to.length == from.length) {
+ System.arraycopy(from, 0, to, 0, from.length);
+ return to;
+ } else {
+ return from.clone();
+ }
+ } else {
+ return EMPTY_DOUBLE_ARRAY;
+ }
+ }
+
+ private boolean[] copyInPlaceOrAllocate(boolean[] from, boolean[] to) {
+ if (to != null && to.length == from.length) {
+ System.arraycopy(from, 0, to, 0, from.length);
+ return to;
+ } else {
+ return from.clone();
+ }
+ }
+
+ private HiveDecimalWritable[] copyInPlaceOrAllocate(HiveDecimalWritable[]
from, HiveDecimalWritable[] to) {
+ if (from.length > 0) {
+ if (to == null || to.length != from.length) {
+ to = new HiveDecimalWritable[from.length];
+ }
+ for (int i = 0; i < from.length; i++) {
+ to[i] = new HiveDecimalWritable(from[i]);
+ }
+ return to;
+ } else {
+ return EMPTY_DECIMAL_ARRAY;
+ }
+ }
+
+ private Timestamp[] copyInPlaceOrAllocate(Timestamp[] from, Timestamp[] to) {
+ if (from.length > 0) {
+ if (to == null || to.length != from.length) {
+ to = new Timestamp[from.length];
+ }
+ for (int i = 0; i < from.length; i++) {
+ to[i] = (Timestamp) from[i].clone();
+ }
+ return to;
+ } else {
+ return EMPTY_TIMESTAMP_ARRAY;
+ }
+ }
+
+ @Override
+ public void copyKey(KeyWrapper oldWrapper) {
+ VectorHashKeyWrapperGeneral clone = (VectorHashKeyWrapperGeneral)
oldWrapper;
+ clone.hashCtx = hashCtx;
+ clone.keyCount = keyCount;
+ clone.longValues = copyInPlaceOrAllocate(longValues, clone.longValues);
+ clone.doubleValues = copyInPlaceOrAllocate(doubleValues,
clone.doubleValues);
+ clone.isNull = copyInPlaceOrAllocate(isNull, clone.isNull);
+ clone.decimalValues = copyInPlaceOrAllocate(decimalValues,
clone.decimalValues);
+
+ if (byteLengths.length > 0) {
+ if (clone.byteLengths == null || clone.byteValues.length !=
byteValues.length) {
+ // byteValues and byteStarts are always the same length
+ clone.byteValues = new byte[byteValues.length][];
+ clone.byteStarts = new int[byteValues.length];
+ clone.byteLengths = byteLengths.clone();
+ for (int i = 0; i < byteValues.length; ++i) {
+ // avoid allocation/copy of nulls, because it potentially expensive.
+ // branch instead.
+ if (byteLengths[i] != -1) {
+ clone.byteValues[i] = Arrays.copyOfRange(byteValues[i],
+ byteStarts[i], byteStarts[i] + byteLengths[i]);
+ }
+ }
+ } else {
+ System.arraycopy(byteLengths, 0, clone.byteLengths, 0,
byteValues.length);
+ Arrays.fill(byteStarts, 0);
+ System.arraycopy(byteStarts, 0, clone.byteStarts, 0,
byteValues.length);
+ for (int i = 0; i < byteValues.length; ++i) {
+ // avoid allocation/copy of nulls, because it potentially expensive.
+ // branch instead.
+ if (byteLengths[i] != -1) {
+ if (clone.byteValues[i] != null && clone.byteValues[i].length >=
byteValues[i].length) {
+ System.arraycopy(byteValues[i], byteStarts[i],
clone.byteValues[i], 0, byteLengths[i]);
+ } else {
+ clone.byteValues[i] = Arrays.copyOfRange(byteValues[i],
+ byteStarts[i], byteStarts[i] + byteLengths[i]);
Review comment:
`clone.byteStarts[i]` is always zero but `byteStarts[i]` can be
different values, depending on how it was assigned initially in
`VectorHashKeyWrapperBatch#assignString` methods. Example:
assignStringBullsNoRepeatingSelection
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