MaxGekk commented on code in PR #45421:
URL: https://github.com/apache/spark/pull/45421#discussion_r1519361693
##########
common/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java:
##########
@@ -378,13 +378,6 @@ public boolean matchAt(final UTF8String s, int pos) {
return ByteArrayMethods.arrayEquals(base, offset + pos, s.base, s.offset,
s.numBytes);
}
- private boolean matchAt(final UTF8String s, int pos, int collationId) {
- if (s.numBytes + pos > numBytes || pos < 0) {
- return false;
- }
- return this.substring(pos, pos + s.numBytes).semanticCompare(s,
collationId) == 0;
Review Comment:
I wonder can't we just use `CollationFactory.getStringSearch` here?
##########
common/unsafe/src/main/java/org/apache/spark/unsafe/types/UTF8String.java:
##########
@@ -396,7 +389,18 @@ public boolean startsWith(final UTF8String prefix, int
collationId) {
if (collationId == CollationFactory.LOWERCASE_COLLATION_ID) {
return this.toLowerCase().startsWith(prefix.toLowerCase());
}
- return matchAt(prefix, 0, collationId);
+ return collatedStartsWith(prefix, collationId);
+ }
+
+ private boolean collatedStartsWith(final UTF8String prefix, int collationId)
{
Review Comment:
Could you point out which unit tests in `UTF8StringSuite` check the
functions.
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