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Connecting to Oracle DB using sqlplus

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# 15  
Old 05-05-2010
Hi.

(minus the connection string - that I'm not totally sure of the reason for) your script is OK, except for the single quotes

Code:
'select sysdate from dual;
EOF'

I'm not sure what purpose they serve.

Your echo statement afterwards (echo "Output_variable, x=$sysdate" is echoing a variable that you never set.
# 16  
Old 05-05-2010
Try this approach:

Code:
my_sql=$(sqlplus -s /nolog <<EOF
connect scott/tiger
set pages 0 
select sysdate from dual; 
exit
EOF)

echo $my_sql

In your case, you can certainly try the following, but you might just need to adjust your tnsnames.ora file so that you can work with just the label or the SID itself:

Code:
my_sql=$(sqlplus -s /nolog <<EOF
connect gidicm/gidicm@'(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.5.199.106)(PORT=1521))(CONNECT_DATA=(SID=PHYGD1)))'

set pages 0 
select sysdate from dual; 
exit
EOF)

echo $my_sql

# 17  
Old 05-05-2010
Quote:
#!/bin/bash
sqlplus gidicm/gidicm@"(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.5.199.106)(PORT=1521))(CONNECT_DATA=(SID=PHYGD1 )))"<< EOF
'select sysdate from dual;
EOF'
echo "Output_variable, x=$sysdate"

Further to "scottn". We lose the spurious single quotes and now try to get the output from the query into a unix environment variable called $myoutput . I've avoided using the name $sysdate for clarity.
The backticks `` enclose the entire sqlplus run and dump the output into the environment variable $sysdate (untested).

Code:
#!/bin/bash
myoutput=`sqlplus gidicm/gidicm@"(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.5.199.106)(PORT=1521))(CONNECT_DATA=(SID=PHYGD1)))"<< EOF
select sysdate from dual;
EOF
`
echo "Output_variable ${myoutput}"

If this works, we move to the next step which is getting Oracle to output a clean result without SQL prompts etc. .



Please also read curleb post above (which I had not read prior to posting) because it contains valuable advice. The lengthy connection string is unusual (and until today I didn't know that syntax). The $( ... commands ... ) syntax is a modern alternative to backticks and recommended by many posters.
The post from curleb also tackles many of the issues with unwanted output from the sqlplus program.
Last edited by methyl; 05-05-2010 at 06:35 PM.. Reason: Reference curleb
# 18  
Old 05-06-2010
@curleb - Thanks a lot for your help!! The code provided by you
Code:
my_sql=$(sqlplus -s /nolog <<EOF
connect gidicm/gidicm@'(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.5.199.106)(PORT=1521))(CONNECT_DATA=(SID=PHYGD1)))'

set pages 0 
select sysdate from dual; 
exit
EOF)

echo $my_sql

Does return a value for $my_sql variable. Now the only problem I am left with is - the output which it returns is as follows:

Connected. 06-MAY-10

I do not need the word 'Connected' in the output. I only need the date part.

Could you please let me know how do i get that?

Thanks a ton for all your help!

Highly appreciated!!

Please advise.
Last edited by shrutihardas; 05-06-2010 at 11:24 AM..
# 19  
Old 05-06-2010
Quote:
Originally Posted by shrutihardas
@curleb - The code provided by you
Code:
my_sql=$(sqlplus -s /nolog <<EOF
connect gidicm/gidicm@'(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.5.199.106)(PORT=1521))(CONNECT_DATA=(SID=PHYGD1)))'

set pages 0 
select sysdate from dual; 
exit
EOF)

echo $my_sql

Establishes a database connection and fires the query on the database. But the my_sql variable does not return anything. It returns a blank output. I guess the $ (....command....) doesnt seem to work at my end. Do you have any other suggestions? I am sure its a very small tweak somewhere in the code that I need. Wondering what am I missing!!

Please advise.
Hi shrutihardas,

I remember from a long time ago, that under some situations $(...) did not work with SQL*Plus (so long, that I don't remember which circumstances Smilie)

See if using back-ticks, instead, helps:
Code:
my_sql=`sqlplus -s /nolog <<EOF
connect gidicm/gidicm@'(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.5.199.106)(PORT=1521))(CONNECT_DATA=(SID=PHYGD1)))'

set pages 0 
select sysdate from dual; 
exit
EOF`

echo $my_sql

Both `...` and $(...) work for me, though.
# 20  
Old 05-06-2010
I am sorry - The code provided by curleb actually works like a charm!

@curleb - Thanks a lot for your help!!

The code Does return a value for $my_sql variable. Now the only problem I am left with is - the output which it returns is as follows:

Connected. 06-MAY-10

I do not need the word 'Connected' in the output. I only need the date part.

Could you please let me know how do i get that?

Thanks a ton for all your help!

Highly appreciated!!

Please advise.
# 21  
Old 05-06-2010
@shrutihardas: I'd think you're still echoing the "Connected." portion of the output from your script...possibly the same typo that was causing the seemingly blank output of the $my_sql variable.
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