Error while assigning dates to associative array of date type

Question

Hi All,
I am facing the issue while assigning dates to associative array of date type:
Oracle Version:
SQL> select * from v$version;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Stored procedure i am trying to write is as following
create or replace procedure jp1 (
p_start_date date default trunc(sysdate,'MM')
, p_end_date date default trunc(sysdate)
is
l_no_of_days number;
type t_date_id is table of date
index by pls_integer;
l_date_id_arr t_date_id;
begin
l_no_of_days := p_end_date - p_start_date;
for i in 0
.. l_no_of_days - 1
loop
    l_date_id_arr := p_start_date + i;
    dbms_output.put_line(p_start_date + i);
end loop;
end;
I am getting error at line 14 while compiling this. and the error message is as following:
Errors for PROCEDURE JP1:
LINE/COL ERROR
14/5     PL/SQL: Statement ignored
14/22    PLS-00382: expression is of wrong type
So while investigating this i tried to output the value of (p_start_date + i) using dbms_output.put_line and the output is date itself.
create or replace procedure jp1 (
p_start_date date default trunc(sysdate,'MM')
, p_end_date date default trunc(sysdate)
is
l_no_of_days number;
type t_date_id is table of date
index by pls_integer;
l_date_id_arr t_date_id;
begin
l_no_of_days := p_end_date - p_start_date;
for i in 0 .. l_no_of_days-1
loop
    --l_date_id_arr := p_start_date + i;
    dbms_output.put_line(p_start_date + i);
end loop;
end;
output of the
exec jp1
is as following:
01-DEC-13
02-DEC-13
03-DEC-13
04-DEC-13
05-DEC-13
06-DEC-13
07-DEC-13
08-DEC-13
09-DEC-13
10-DEC-13
11-DEC-13
12-DEC-13
13-DEC-13
14-DEC-13
15-DEC-13
16-DEC-13
17-DEC-13
18-DEC-13
I see the output as date itself. so why it is throwing error while assigning the same to associative array of date type.
I tried to google also for the same but to no avail.
Any help in this regard is appreciated or any pointer some other thread on internet or in this forum.
Thanks in advance
Jagdeep Sangwan

Answer 1

Read about associative arrays :
create or replace procedure jp1 (
p_start_date date default trunc(sysdate,'MM')
, p_end_date date default trunc(sysdate)
) is
l_no_of_days number;
type t_date_id is table of date
index by pls_integer;
l_date_id_arr t_date_id;
begin
l_no_of_days := p_end_date - p_start_date;
for i in 0..l_no_of_days - 1
loop
    l_date_id_arr(i) := p_start_date + i;
    dbms_output.put_line(p_start_date + i);
end loop;
end;
Ramin Hashimzade