badly placed ()'s when creating oracle database link in tcsh - oracle

Question

#my code
echo \
'create database link remotec101 \
connect to "os_user" \
identified by "password" \
using ' \
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP) \
(HOST=c101) \
(PORT=1521)) \
(CONNECT_DATA=(SID=XE)))';'|sqlplus
I tried to run some sql in this way and it worked. But when creating database link I got error, saying badly placed ()'s
This code is in tcsh.
Please help me.
Thanks

Answer 1

The parentheses are not quoted, so they're treated as shell metacharacters.
This:
echo \
'create database link remotec101 \
connect to "os_user" \
identified by "password" \
using \
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP) \
(HOST=c101) \
(PORT=1521)) \
(CONNECT_DATA=(SID=XE)));' | sqlplus
will feed the following to the sqlplus command:
create database link remotec101
connect to "os_user"
identified by "password"
using
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)
(HOST=c101)
(PORT=1521))
(CONNECT_DATA=(SID=XE)));
But a "here document" is probably cleaner:
sqlplus <<'EOF'
create database link remotec101
connect to "os_user"
identified by "password"
using
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)
(HOST=c101)
(PORT=1521))
(CONNECT_DATA=(SID=XE)));
'EOF'
If you want the last 4 lines to become a single line of input to sqlplus, I think you'll need to put them all on one line in your script. Or you might find it easier to use the printf command to organize your output, for example:
printf '%s\n%s\n%s\n%s\n%s %s %s %s\n' \
'create database link remotec101' \
'connect to "os_user"' \
'identified by "password"' \
'using' \
'(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)' \
'(HOST=c101)' \
'(PORT=1521))' \
'(CONNECT_DATA=(SID=XE)));' | sqlplus
This prints the last 4 lines as a single line. You can adjust the format string as needed.

Answer 2

I figured it out. You have to utilize the fact that tcsh supports both quote types and echo allows multiple arguments:
echo 'create database link remotec101 \
connect to "os_user" \
identified by "password" \
using ' "'" ' ( DESCRIPTION= ( ADDRESS= ( PROTOCOL=TCP )
( HOST=c101 )
( PORT=1521 ) )
( CONNECT_DATA= ( SID=XE ) ) ) ' "';"