pitrou commented on a change in pull request #10448:
URL: https://github.com/apache/arrow/pull/10448#discussion_r647192569
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File path: cpp/src/arrow/compute/kernels/scalar_string.cc
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@@ -636,13 +728,15 @@ std::string MakeLikeRegex(const MatchSubstringOptions&
options) {
}
// A LIKE pattern matching this regex can be translated into a substring
search.
-static RE2 kLikePatternIsSubstringMatch("%+([^%_]*)%+");
+static RE2 kLikePatternIsSubstringMatch(R"(%+([^%_]*[^\\%_])?%+)");
+// A LIKE pattern matching this regex can be translated into a prefix search.
+static RE2 kLikePatternIsStartsWith(R"(([^%_]*[^\\%_])?%+)");
+// A LIKE pattern matching this regex can be translated into a suffix search.
+static RE2 kLikePatternIsEndsWith(R"(%+([^%_]*))");
Review comment:
Interesting, thank you.
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