This file is indexed.

/usr/lib/mysql-testsuite/r/have_tis620.require is in percona-server-test-5.6 5.6.22-rel71.0-0ubuntu4.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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Collation	Charset	Id	Default	Compiled	Sortlen
tis620_thai_ci	tis620	18	Yes	Yes	4