client.rb in opentelemetry-instrumentation-mysql2-0.24.1

- old
+ new

@@ -70,11 +70,15 @@
 
           private
 
           def obfuscate_sql(sql)
             if sql.size > config[:obfuscation_limit]
-              truncated_sql = sql[..sql.index(generated_mysql_regex) - 1]
-              truncated_sql + "...\nSQL truncated (> #{config[:obfuscation_limit]} characters)"
+              first_match_index = sql.index(generated_mysql_regex)
+              truncation_message = "SQL truncated (> #{config[:obfuscation_limit]} characters)"
+              return truncation_message unless first_match_index
+
+              truncated_sql = sql[..first_match_index - 1]
+              "#{truncated_sql}...\n#{truncation_message}"
             else
               obfuscated = OpenTelemetry::Common::Utilities.utf8_encode(sql, binary: true)
               obfuscated = obfuscated.gsub(generated_mysql_regex, '?')
               obfuscated = 'Failed to obfuscate SQL query - quote characters remained after obfuscation' if detect_unmatched_pairs(obfuscated)
               obfuscated