dump transaction Restrictions

Restrictions for using dump transaction.

The maximum file path/name size for a physical device is 127 characters.
You cannot dump to the null device (on UNIX, /dev/null).
You cannot use the dump transaction command in a transaction.
When using 1/4-inch cartridge tape, you can dump only one database or transaction log per tape.
You cannot run dump transaction database_name to before fully dumping a newly created database.
You cannot use dump transaction database_name to once an unlogged operation has been performed in the database.
You cannot issue dump the transaction log while the trunc log on chkpt database option is enabled or after enabling select into/bulk copy/pllsort and making minimally logged changes to the database with select into, fast bulk copy operations, default unlogged writetext operations, or a parallel sort. Use dump database instead.

Warning! Do not modify the log table syslogs with a delete, update, or insert command.
If a database does not have a log segment on a separate device from data segments, you cannot use dump transaction to copy the log and truncate it.
If a user or threshold procedure issues a dump transaction command on a database where a dump database or another dump transaction is in progress, the second command sleeps until the first completes.
To restore a database, use load database to load the most recent database dump; then use load transaction to load each subsequent transaction log dump in the order in which it was made.
Each time you add or remove a cross-database constraint, or drop a table that contains a cross-database constraint, dump both of the affected databases.

Warning! Loading earlier dumps of these databases can cause database corruption.
You cannot mix SAP dumps and non-SAP data (for example, UNIX archives) on the same tape.
You cannot dump a transaction with no_log or with truncate_only if the database has offline pages.

Restrictions differ when using the with no_truncate option. Under normal circumstances, the SAP ASE server returns an error message when:

Running dump transaction database_name to before fully dumping a newly created databases:

This database has not been dumped since it was
created or upgraded or a transaction dump may have 
been loaded using the UNTIL_TIME clause. You must 
perform a DUMP DATABASE before you can dump its 
transaction log.

Using dump transaction database_name to once you have performed a minimally logged operation in the database:
```
Dump transaction is not allowed because a
non-logged operation was performed on the database. 
Dump your database or use dump transaction with
truncate_only until you can dump your database.
```
See Fully Recoverable DDL and dump transaction for more information.

Using dump transaction database_name to after you have performed dump transaction with truncate_only:

DUMP TRANsaction to a dump device is not allowed
where a truncate-only transaction dump has been
performed after the last DUMP DATABASE. Use DUMP
DATABASE instead.

When you use the with no_truncate option in your dump transaction database_name to dump_file command, however, the SAP ASE server does not perform a check of the database and thus does not return any of these error messages. The SAP ASE server assumes that your database has some lost data (for example, from a failed disk) and is therefore inaccessible.

You do, however, get an error message when you then try to load your transaction. Your load transaction process may fail, with this error message:

Specified file 'dump device' is out of sequence. Current
timestamp is <X> while dump was from <Y>.