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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

RE: Checking if remote database is up

Kirtikumar Deshpande

2005-04-26

Replies:
I have used following script for the past several years.. And has worked well in our
environment. The script attempts to connect to the remote database using a non-existent
user/pw, and deals with generated ORA errors...

#!/usr/bin/ksh
#
# dbcheck : Script to check if database is up and accessible
#
# Author : Kirti Deshpande
#
#

echo "Enter Name of the Database SID to check if it is accessible"
read DB

sqlplus -s << EOF > /tmp/$$.1
whenever sqlerror exit
aaa/aaa@(protected)
exit;
EOF
egrep 'ORA-121|ORA-01034' /tmp/$$.1 > /dev/null
if [[ $? = 0 ]]
then
 echo "-----> '$DB' is _NOT_ accessible\n"
else
 grep 'ORA-01017' /tmp/$$.1 > /dev/null
 if [[ $? = 0 ]]
 then
  echo "-----> '$DB' is UP and Accessible\n"
 else
  echo "-----> '$DB' is _NOT_ accessible\n"
 fi
fi
#-- End of file

Cheers!

- Kirti


--- Gene Sais <Gsais@(protected):
> I prefer to do the check outside the db from a ksh script. It's not going to help when
> the db doing the check is down :).
> >>> "Mercadante, Thomas F (LABOR)" <thomas.mercadante@(protected)
> AM >>>
> This is an even easier approach if all his queries go through stored procs
> as you mentioned.
>

< snip>

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