Scylla inherited a 48-character limit on the length of table (and
keyspace) names from Cassandra 3. It turns out that Cassandra 4 and
5 unintentionally dropped this limit (see history lesson in
CASSANDRA-20425), and now Cassandra accepts longer table names.
Some Cassandra users are using such longer names and disappointed
that Scylla doesn't allow them.
This patch includes tests for this feature. One test tries a
48-character table name - it passes on Scylla and all versions
of Cassandra. A second test tries a 100-character table name - this
one passes on Cassandra version 4 and above (but not on 3), and
fails on Scylla so marked "xfail". A third test tries a 500-character
table name. This one fails badly on Cassandra (see CASSANDRA-20389),
but passes on Scylla today. This test is important because we need to
be sure that it continues to pass on Scylla even after the Scylla is
fixed to allow the 100-character test.
Refs #4480 - an issue we already have about supporting longer names
Note on the test implementation:
Ideally, the test for a particular table-name length shouldn't just
create the table - it should also make sure we can write table to it
and flush it, i.e., that sstables can get written correctly. But in
practice, these complications are not needed, because in modern Scylla
it is the directory name which contains the table's name, and the
individual sstable files do not contain the table's name. Just creating
the table already creates the long directory name, so that is the part
that needs to be tested. If we created this directory successfully,
later creating the short-named sstables inside it can't fail.
Signed-off-by: Nadav Har'El <nyh@scylladb.com>
Closesscylladb/scylladb#23229
