how to get the next value in a sequence?

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i have to get the next value in a sequence.....
i have created this procedure which has been created successfully but when i give it a call it give me errors...
ORA-00900 invalid sql statement
ORA-06512 at "system.next_val" at line 7

please can anyone help me.....

////procedure

SQL

create or replace procedure next_value (seqname varchar2)
as

nextvalue integer;
stat varchar2(100);

begin

stat := 'select '|| seqname||'.nextval from dual';

execute immediate stat into nextvalue;

dbms_output.put_line('Next value is: '||TO_CHAR(nextvalue));

end;

call to procedure

SQL

begin
next_value('dept');
end;

Posted 22-Nov-14 16:19pm

Member 10740412

Updated 22-Nov-14 16:40pm

v3

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Jörgen Andersson 23-Nov-14 10:02am

Have you created the sequence called 'dept'?

Member 10740412 23-Nov-14 17:57pm

yep

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Maciej Los · Answer 1 · 2014-11-23T08:01:00

Solution 1

The question is to vague to answer it. I'd suggest to read this:
ORA-06512[^]
ORA-00900[^]

Posted 23-Nov-14 8:01am

Maciej Los

Smart003 · Answer 2 · 2014-11-28T05:09:00

hi Member 10740412,
When I had executed the same code for the first time, got the same errors. We will get those errors if the sequence was not created in that schema where the procedure was executed.
I will suggest you some logic this may resolve your problem .We will use dynamic programing for that procedure

1. First check whether the sequence exist or not if not exist then automatically create the sequence otherwise it will exit the block.

2. After that block do the operations

after creation of this procedure now execute with your example

3.Test the code with an example

let me know how you check those block

regards
Smart003