deniskuzZ commented on code in PR #5624:
URL: https://github.com/apache/hive/pull/5624#discussion_r2167425863
##########
ql/src/java/org/apache/hadoop/hive/ql/udf/UDFSubstr.java:
##########
@@ -172,32 +170,69 @@ public BytesWritable evaluate(BytesWritable bw,
IntWritable pos, IntWritable len
}
private BytesWritable evaluateInternal(BytesWritable bw, int pos, int len) {
-
if (len <= 0) {
return new BytesWritable();
}
- int[] index = makeIndex(pos, len, bw.getLength());
- if (index == null) {
+ byte[] b = Arrays.copyOf(bw.getBytes(), bw.getLength());
+ StringSubstrColStartLen.populateSubstrOffsets(b, 0, b.length,
craetePos(pos), len, index);
+ if (index[0] == -1) {
return new BytesWritable();
}
- return new BytesWritable(Arrays.copyOfRange(bw.getBytes(), index[0],
index[1]));
+ return new BytesWritable(arrayCopy(b, index[0], index[1]));
+ }
+
+ private BytesWritable evaluateInternal(BytesWritable bw, int pos) {
+ byte[] b = Arrays.copyOf(bw.getBytes(), bw.getLength());
+ int offset = StringSubstrColStart.getSubstrStartOffset(b, 0, b.length,
craetePos(pos));
+ if (offset == -1) {
+ return new BytesWritable();
+ }
+
+ return new BytesWritable(arrayCopy(b, offset, bw.getLength() - offset));
}
public BytesWritable evaluate(BytesWritable bw, IntWritable pos){
- return evaluate(bw, pos, maxValue);
+ if ((bw == null) || (pos == null)) {
+ return null;
+ }
+ return evaluateInternal(bw, pos.get());
}
public BytesWritable evaluate(BytesWritable bw, LongWritable pos){
- return evaluate(bw, pos, maxLongValue);
+ if ((bw == null) || (pos == null)) {
+ return null;
+ }
+
+ return evaluateInternal(bw, (int) pos.get());
}
@Override
public StatEstimator getStatEstimator() {
return new SubStrStatEstimator();
}
+ private byte[] arrayCopy(byte[] src, int pos, int len) {
Review Comment:
@ryukobayashi, in Java, array indices cannot be negative
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