Ask User confirmation before droping table

Question

Hi,
I need to build a script that ask user a confirmation before that he execute the script that drop a table like "Do you check the log file before droping table Y/N"
I start to do this but it's not working well, I'm new in sql and PLsql
accept condition prompt "Do you check all log file (Y/N)"
DECLARE
V varchar2(1) := 'N';
BEGIN
if &condition=V then
EXECUTE IMMEDIATE 'drop table t';
else
dbms_output.put_line ('please check your log file');
end if;
END;
Regards,

Answer 1

vittel wrote:
Hi,
I need to build a script that ask user a confirmation before that he execute the script that drop a table like "Do you check the log file before droping table Y/N"
I start to do this but it's not working well, I'm new in sql and PLsql
accept condition prompt "Do you check all log file (Y/N)"
DECLARE
V varchar2(1) := 'N';
BEGIN
if &condition=V then
EXECUTE IMMEDIATE 'drop table t';
else
dbms_output.put_line ('please check your log file');
end if;
END;
/if the value of &condition is the single character N, then
if &condition=V thenwill be sent to the compiler as:
if N=V thenWhich assumes there is a variable called N.
I think what you meant was:
if '&condition' = V thenwhich will be sent to the compiler as
if 'N' = V thenNote that substitution variables (like &condition) are evaluated and replaced before the PL/SQL code is compiled, so you can use substitution variables in an anonymous block, like you're doing, but you can't use them in a stored procedure to get user input at run-time.