Error while passing bash user input to sql statement - linux

Question

I am trying to write a bash function which prompts for the schema owner and drops all the corresponding schemas.
function db_cleanup
{
#accept user input
read -p "Schema Owner: " input
sqlplus -s $usr1/$pwd1#$sid1 << EOF
declare
usr_d varchar2(10) := '&input'; --reas user input here
sqlstmt varchar2(128);
begin
sqlstmt := 'drop user '||$usr_d||' cascade';
dbms_output.put_line(sqlstmt); execute immediate sqlstmt;
sqlstmt := 'drop user ab_'||$usr_d||' cascade';
dbms_output.put_line(sqlstmt); execute immediate sqlstmt;
sqlstmt := 'drop user xy_'||$usr_d||' cascade';
dbms_output.put_line(sqlstmt); execute immediate sqlstmt;
end;
/
EOF
}
Output looks like:
Enter Schema Owner: ABC
Enter value for usr_in:
User requested Interrupt or EOF detected.
-bash-3.2$
Please let me know how to fix this one. Thanks in advance.

Answer 1

Pulling together comments from #244an and myself:
'&input' should be '$input', because you're referring to a shell variable.
$usr_d should be usr_d (without the $) because you are not referring to a sheel variable here; this is coming from the PL/SQL declare section.
the -s flag to SQL*Plus suppresses the banners; but you original question showed that so not sure if you've lost that somewhere along the way.
So:
function db_cleanup
{
#accept user input
read -p "Schema Owner: " input
sqlplus -s $usr1/$pwd1#$sid1 << EOF
set timing off
set feedback off
set serverputput on size 10000
spool $log_file.out
declare
usr_d varchar2(10) := '$input';
sqlstmt varchar2(128);
begin
sqlstmt := 'drop user '||usr_d||' cascade';
dbms_output.put_line(sqlstmt);
execute immediate sqlstmt;
sqlstmt := 'drop user ab_'||usr_d||' cascade';
dbms_output.put_line(sqlstmt);
execute immediate sqlstmt;
sqlstmt := 'drop user xy_'||usr_d||' cascade';
dbms_output.put_line(sqlstmt);
execute immediate sqlstmt;
end;
/
EOF
}
Not sure if you might want to sanitize the schema you're given... there are a number of users you really don't want to drop by accident. Any of these for a start, and you might have your own too.