deniskuzZ commented on code in PR #5624:
URL: https://github.com/apache/hive/pull/5624#discussion_r2009123344
##########
ql/src/java/org/apache/hadoop/hive/ql/udf/UDFSubstr.java:
##########
@@ -96,53 +96,131 @@ private Text evaluateInternal(Text t, int pos, int len) {
return r;
}
- String s = t.toString();
- int[] index = makeIndex(pos, len, s.length());
- if (index == null) {
+ byte[] utf8String = t.toString().getBytes();
+ populateSubstrOffsets(utf8String, pos, len);
+ if (index[0] == -1) {
return r;
}
- r.set(s.substring(index[0], index[1]));
+ r.set(new String(utf8String, index[0], index[1]));
return r;
}
- private int[] makeIndex(int pos, int len, int inputLen) {
- if ((Math.abs(pos) > inputLen)) {
- return null;
+ private Text evaluateInternal(Text t, int pos) {
+ r.clear();
+
+ byte[] utf8String = t.toString().getBytes();
+ int offset = getSubstrStartOffset(utf8String, pos);
+ if (offset == -1) {
+ return r;
}
- int start, end;
+ r.set(new String(utf8String, offset, utf8String.length - offset));
+ return r;
+ }
+
+ private void populateSubstrOffsets(byte[] utf8String, int start, int len) {
Review Comment:
try to reuse methods instead of copy&paste
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