NDB Cluster stores foreign names using the same lettercase with which they are created. Prior to version 8.0.20, when processing SELECT and other SQL statements, NDB compared the names of foreign keys in such statements with the names as stored in a case-sensitive fashion when lower_case_table_names was equal to 0. In NDB 8.0.20 and later, this value no longer has any effect on how such comparisons are made, and they are always done without regard to lettercase. (Bug #30512043)