Using JDBC String based Cache Store + sybase 160 is throwing the following exception:

Caused by: com.sybase.jdbc4.jdbc.SybSQLException:
There is already an index on table 'ISPN_STRING_StringBasedCache' named '"ISPN_STRING_StringBasedCache_timestamp_index"'

Sybase is storing indexes into the database with double quotes

This line https://github.com/infinispan/infinispan/blob/master/persistence/jdbc/src/main/java/org/infinispan/persistence/jdbc/impl/table/AbstractTableManager.java#L175 will be always false with sybase according to the above explanation.