All Oracle Error Codes
Oracle DBA Forum

Frequent Oracle Errors

TNS:could not resolve the connect identifier specified
Backtrace message unwound by exceptions
invalid identifier
PL/SQL compilation error
internal error
missing expression
table or view does not exist
end-of-file on communication channel
TNS:listener unknown in connect descriptor
insufficient privileges
PL/SQL: numeric or value error string
TNS:protocol adapter error
ORACLE not available
target host or object does not exist
invalid number
unable to allocate string bytes of shared memory
resource busy and acquire with NOWAIT specified
error occurred at recursive SQL level string
ORACLE initialization or shutdown in progress
archiver error. Connect internal only, until freed
snapshot too old
unable to extend temp segment by string in tablespace
Credential retrieval failed
missing or invalid option
invalid username/password; logon denied
unable to create INITIAL extent for segment
out of process memory when trying to allocate string bytes
shared memory realm does not exist
cannot insert NULL
TNS:unable to connect to destination
remote database not found ora-02019
exception encountered: core dump
inconsistent datatypes
no data found
TNS:operation timed out
PL/SQL: could not find program
existing state of packages has been discarded
maximum number of processes exceeded
error signaled in parallel query server
ORACLE instance terminated. Disconnection forced
TNS:packet writer failure
see ORA-12699
missing right parenthesis
name is already used by an existing object
cannot identify/lock data file
invalid file operation
quoted string not properly terminated


Paul Baumgartel


We use sys_guid for all primary keys in our application. We frequently
move schemas between machines with no ill effects. Although the
decision to use sys_guid was made before I took my current job, and I
wasn't convinced that sequences wouldn't have done the job just as
well, when we started using multi-master replication I was very happy,
because managing sequences in replicated databases is a pain. With
sys_guid, there's no sweat.

--- Michael Fontana <mfontana@(protected):

> Does anyone use the SYS_GUID function made available in Oracle9i?
> I recommended this be used instead of sequences for a distributed
> processing design, and some on the team are rightfully concerned
> about
> recoverability issues. For example, would a recovered database table
> have the original sys_guid values? Would the recovered values still
> be
> unique? If anyone knows the answers to these questions, or has some
> experience with using this functionality, I would appreciate hearing
> about their experience.
> Thanks!
> Michael Fontana
> Sr. DBA
> NTT/Verio

Paul Baumgartel
Transcentive, Inc.

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