uros-db commented on code in PR #45421:
URL: https://github.com/apache/spark/pull/45421#discussion_r1519387286


##########
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:
   We can, that's exactly what Stevo is doing - removing this code and 
replacing it with `CollationFactory.getStringSearch`. For more context: the old 
implementation was there before we introduced `StringSearch`.



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