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Printing the value of a variable in SQL Developer
(9 answers)
Closed 4 years ago.
I'm just getting into PL/SQL, and I tried to run the following code, and I am getting anonymous block completed, but I think I should be getting Testing output. Does any know what I am doing wrong?
DECLARE
message varchar2(20) := 'Testing output';
BEGIN
dbms_output.put_line(message);
END;
/
Viewing the DBMS_OUTPUT depends on the program.
SQL*Plus and Oracle SQL Developer
Run SET SERVEROUTPUT ON; first. This is all that's necessary in SQL*Plus or recent versions of Oracle SQL Developer.
SET SERVEROUTPUT ON;
begin
dbms_output.put_line('Testing output');
end;
/
PL/SQL Developer
Output is automatically detected and displayed in the "Output" tab.
Yes, in Oracle SQL Developer put the statement:
SET SERVEROUTPUT ON;
just before your DECLARE keyword and this should work.
I couldn't find View -> DBMS Output and I'm using version 1.5.5.
Yes. There is way to see output in SQL Developer.
Click ->View->Dbms Output and then click + symbol on Dbms output window. now you can run the procedure and can see output.
`The following statement will give the possible solution try this out
SET SERVEROUTPUT ON;
Then Run this code will get the following output
declare
a integer :=10;
b integer :=20;
c integer;
f real;
begin
c := a+b;
dbms_output.put_line('value of c: ' || c);
f := 70.0/3.0;
dbms_output.put_line('value of f: ' || f);
end;
/
The code will give the following output
value of c: 30
value of f: 23.3333333333333333333333333333333333333
PL/SQL procedure successfully completed.
Yes, this is correct. You need to use before this block:
SET SERVEROUTPUT ON
Then, message get displayed on window.
Else we can check in SQL Developer select "View" -> "DBMS Output".
and in PLSQL developer under the OutPut tab we can check message.
If you are getting "anonymous block completed" while executing the procedure by typing "EXECUTE ;" then run the below command & again execute the procedure.
command is
SET SERVEROUTPUT ON;
**SET SERVEROUTPUT ON;**
DECLARE
a INTEGER :=10;
b INTEGER :=20;
c float ;
d real ;
BEGIN
c :=a+b;
dbms_output.put_line('the value of C is :'|| c);
d := 70.0/3.3;
dbms_output.put_line('the value of d is:'|| d);
END;
This will give you the output
the value of C is: 30
the value of d is: 21.21212121212121212121212121212121212121
Related
I am trying to run a pl/sql procedure which I have attatched below, and am getting the following error when running my script
DBMS_OUTPUT.ENABLE;
create or replace procedure grade_point212
is
cursor c1 is
----Cursor declaration--
SELECT student.student_id, student.first_name, student.last_name, course.course_id, course.course_name, class.grade
FROM CLASS
JOIN STUDENT
ON student.student_id = class.student_id
JOIN course
ON course.course_id = class.course_id
order by 1;
----Variable declation--
v_student_id student.student_id%type;
v_first_name student.first_name%type;
v_last_name student.last_name%type;
v_course_id course.course_id%type;
v_course_name course.course_name%type;
v_grade class.grade%type;
--3 additional varriables--
prev_student student.student_id%type;
course_count number(3);
grade_point_total number(3);
----mainline--
begin
open c1;
loop
--Get the first row in the cursor--
fetch c1
into v_student_id,v_first_name ,v_last_name,v_course_id,v_course_name,v_grade;
exit when c1%notfound;
--Set the prev_student to the cursor’s student id--
prev_student:=v_student_id;
--Set the grade_point _total to 0--
grade_point_total:=0;
--Set the course_count to 0--
course_count:=0;
--If the prev_studentis NOT equal to cursor’s student id--
IF prev_student!=v_student_id THEN
--Print out the grade point average which is grade_point_total divided by course_count--
DBMS_OUTPUT.PUT_LINE(grade_point_total/course_count);
--Set prev_student to the cursor’s student id--
prev_student:=v_student_id;
--Set the grade_point_total to 0--
grade_point_total:=0;
--Set the course_count to 0--
course_count:=0;
END IF;
--Add the grade point of the cursor’s grade to grade_point_total--
grade_point_total:=grade_point_total+GradePoint(v_grade);
--Add 1 to the course_count--
course_count:=course_count+1;
--Print out the current row--
DBMS_OUTPUT.PUT_LINE(v_student_id||' '||v_first_name||' '||v_last_name||' '||v_course_id||' '||v_course_name||' '||v_grade);
--Fetch a new row--
fetch c1
into v_student_id,v_first_name ,v_last_name,v_course_id,v_course_name,v_grade;
end loop;
--Close the cursor--
close c1;
--Print out the grade point average which is grade_point_total divided by course_count--
DBMS_OUTPUT.PUT_LINE(grade_point_total/course_count);
end;
set serveroutput on;
begin
grade_point212;
end;
"Error starting at line : 1 in command -
DBMS_OUTPUT.ENABLE
Error report -
Unknown Command
Procedure GRADE_POINT212 compiled
LINE/COL ERROR
--------- -------------------------------------------------------------
65/1 PLS-00103: Encountered the symbol "SET"
Errors: check compiler log
"
The "/" is correct. As a follow up, what tool you are using to send your scripts to the database?
SQL*Plus uses the standalone "/" line as the indicator that the sequence of strings is complete and therefore can be sent to the database for compilation and execution. If you don't provide the "/" you will get errors that on closer read will indicate that some compilation has failed because the sequence you send will actually be composed of multiple SQL, SQL*Plus, and PLSQL blocks.
The execute keyword, BTW, as in:
exec dbms_output.enable;
is SQLPlus syntactic sugar that gets converted by SQLPlus into:
begin dbms_output.enable; end;
Try exec in front of your dbms..
exec dbms_output.enable;
Remove the first line (DBMS_OUTPUT.ENABLE;) entirely. set serveroutput on (before you're about to execute the procedure) will enable it.
Or, encapsulate it into the procedure or the anonymous PL/SQL block itself, e.g.
SQL> begin
2 dbms_output.enable;
3 end;
4 /
PL/SQL procedure successfully completed.
SQL>
You missed the trailing "/" to execute the "CREATE OR REPLACE" statement. The ";" As explained here, the semi-colon ends your pl/sql statement but you need the slash to execute it.
The error "Encountered the symbol "SET" Errors: check compiler log " refers to the "SET" string from the "set serveroutput on" statement.
...
DBMS_OUTPUT.PUT_LINE(grade_point_total/course_count);
end;
/ <<< Add this
set serveroutput on;
begin
grade_point212;
end;
/ <<< Add this
Since my school does not allow me to post the code, hence i had to come back home and put up an example to show the issue i am facing. My school asked me to do a homework on dynamic sql to create a table and later insert one dummy record to it. But while doing it I am facing the below issue. Please find the code below for your reference. Thank you.
Procedure:
create or replace procedure table_creation(table_name in varchar2,col1 varchar2,col2 varchar2)
is
l_stat varchar2(3000);
v_stat varchar2(1000);
a varchar2(10):='1';
b varchar2(10):='Dummy';
begin
l_stat:='create table '||table_name||' ("'||col1||'" varchar2(10),"'||col2||'" varchar2(10))';
execute immediate l_stat;
execute immediate 'insert into '||table_name||'('||col1||','||col2||') values (:x,:y)' using a,b;
end;
/
Plsql Block to call the procedure:
set serveroutput on;
declare
a varchar2(10);
b varchar2(10);
c varchar2(10);
begin
a:='Example';
b:='id';
c:='nm';
table_creation(a,b,c);
dbms_output.put_line('Yes');
end;
/
The procedure is getting created perfectly and while running the above block i am getting the below error .
declare
*
ERROR at line 1:
ORA-00904: "NM": invalid identifier
ORA-06512: at "SYS.TABLE_CREATION", line 9
ORA-06512: at line 9
But when I checked the created table. The table exists with 0 records. The structure of the table is as follows.
Name Null? Type
----------------------------------------- -------- ---------------
ID VARCHAR2(10)
NM VARCHAR2(10)
Any help from your end is much appreciated.
Nick,
Please note that the above procedure will create the column with a double qoutes ("ID","NM") hence the error occurred. Please find the updated code and check if the issue has resolved.
According to oracle=>
Oracle is case sensitive in column and table names. It just converts everything to upper case by default. But if you use names in double quotes, you tell Oracle to create the column in the exact spelling you provided (lower case in the CREATE statement).
Code:
create or replace procedure table_creation(table_name in varchar2,col1 varchar2,col2 varchar2)
is
l_stat varchar2(3000);
v_stat varchar2(1000);
a varchar2(10):='1';
b varchar2(10):='Dummy';
begin
l_stat:='create table '||table_name||' ('||col1||' varchar2(10),'||col2||' varchar2(10))';
execute immediate l_stat;
execute immediate 'insert into '||table_name||'('||col1||','||col2||') values (:x,:y)' using a,b;
end;
/
Note: I have not touched any other logic of the code. Please try and let us know the result.
Only change is
From :
l_stat:='create table '||table_name||' ("'||col1||'" varchar2(10),"'||col2||'" varchar2(10))';
to :
l_stat:='create table '||table_name||' ('||col1||' varchar2(10),'||col2||' varchar2(10))';
I would like to declare and display a variable in Oracle.
In T-SQL I would do something like this
DECLARE #A VARCHAR(10) --Declares #A
SELECT #A = '12' --Assigns #A
SELECT #A --Displays #A
How can I do this in Oracle.
If you're talking about PL/SQL, you should put it in an anonymous block.
DECLARE
v_text VARCHAR2(10); -- declare
BEGIN
v_text := 'Hello'; --assign
dbms_output.Put_line(v_text); --display
END;
If using sqlplus you can define a variable thus:
define <varname>=<varvalue>
And you can display the value by:
define <varname>
And then use it in a query as, for example:
select *
from tab1
where col1 = '&varname';
If you are using pl/sql then the following code should work :
set server output on -- to retrieve and display a buffer
DECLARE
v_text VARCHAR2(10); -- declare
BEGIN
v_text := 'Hello'; --assign
dbms_output.Put_line(v_text); --display
END;
/
-- this must be use to execute pl/sql script
Make sure that, server output is on otherwise output will not be display;
sql> set serveroutput on;
declare
n number(10):=1;
begin
while n<=10
loop
dbms_output.put_line(n);
n:=n+1;
end loop;
end;
/
Outout:
1
2
3
4
5
6
7
8
9
10
Did you recently switch from MySQL and are now longing for the logical equivalents of its more simple commands in Oracle? Because that is the case for me and I had the very same question. This code will give you a quick and dirty print which I think is what you're looking for:
Variable n number
begin
:n := 1;
end;
print n
The middle section is a PL/SQL bit that binds the variable. The output from print n is in column form, and will not just give the value of n, I'm afraid. When I ran it in Toad 11 it returned like this
n
---------
1
I hope that helps
I am new to Oracle and SQL and am trying to execute a simple test function from within SQL*Plus. My function is called tf (for Test Function) and it is defined in a file called tf.sql as follows ;
create or replace
function
tf
(
arg1 in varchar2
)
return number
as
return_value number;
begin
return_value := 0;
dbms_output.put_line('Argument 1 = ' || arg1);
return return_value;
end;
/
I am able to successfully load this function into Oracle using the following command ;
SQL> start ./tf.sql
As a result of executing this command, SQL*Plus simply states ;
Function created.
When I then execute the following command from the SQL*Plus command prompt (after I have invoked set serveroutput on) ;
SQL> exec dbms_output.put_line(SYSTEM.TF('Hello'));
I get the following output ;
Argument = Hello
0
PL/SQL procedure successfully completed.
Now, if I attempt to execute my function directly from the SQL*Plus command prompt, using the following command ;
SQL> exec SYSTEM.TF('Hello');
then I get presented with the following error message from SQL*Plus ;
BEGIN SYSTEM.TF('Hello'); END;
*
ERROR at line 1:
ORA-06550: line 1, column 7:
PLS-00221: 'TF' is not a procedure or is undefined
ORA-06550: ;ine 1, column 7
PL/SQL: Statement ignored
Is anyone able to shed any light on this for me? I can't work out why my function appears to execute successfully in the first case, but not in the second case.
If I execute the following command from the SQL*Plus command prompt ;
SQL> select * from user_objects where object_name = 'TF';
then I get the following results returned ;
OBJECT_NAME
-----------
TF
SUBOBJECT_NAME
--------------
OBJECT_ID
---------
74475
DATA_OBJECT_ID
--------------
OBJECT_TYPE
-----------
FUNCTION
CREATED
-------
05-FEB-12
LAST_DDL_
---------
05-FEB-12
TIMESTAMP
---------
2012-02-05:02:11:15
STATUS
------
VALID
T
-
N
G
-
N
S
-
N
EDITION_NAME
------------
1
Any help on this would be immensely appreciated.
Thanks in advance.
Craig
exec does not work with functions because it does not know what to do with the return value. This is similar to a regular PL/SQL statement; if you call a function you must assign the return value to something.
If you want to use a function in SQL*Plus, you should use SQL instead:
select tf('asdf') from dual;
Also, you should never create objects in SYSTEM. This can cause some really weird problems.
Following on from #jonearles answer,which highlights the difference between a function and a procedure from SQL*Plus' perspective, and #MS Stp's comment, one way to run it is:
variable rc number;
exec :rc := tf('Hello');
Argument = Hello
PL/SQL procedure successfully completed.
To see the return code you can then do:
print rc
0
exec is really just shorthand for an anonymous PL/SQL block, as you can see from the error message you got. variable lets you declare a bind variable at SQL*Plus level, rather than in the block. You can also declare the argument as bind variable, and set it with a separate exec call:
variable rc number;
variable arg varchar2(5);
exec :arg := 'Hello';
exec :rc := tf(:arg);
I often use this construct for testing an existing procedure call, e.g. something copied from Pro*C code, without having to replace the variables in that call with fixed values. It can make it easier to call repeatedly with different arguments, and you can reuse variables in several calls - so you could pass :rc to another function later.
I am having trouble testing this simple stored procedure in Oracle Sql Developer. The stored procedure does a simple select and returns a cursor.
create or replace
PROCEDURE GET_PROJECT_DRF_HISTORY
( projectId IN NUMBER,
resultset_out OUT sys_refcursor
) AS
BEGIN
OPEN resultset_out for
SELECT * from GLIDE_HISTORY
where GLIDE_HISTORY.PRJ_ID = projectId;
/* DBMS_OUTPUT.PUT_LINE(resultset_out);*/
END GET_PROJECT_DRF_HISTORY;
To test this procedure, I used the below script:
variable results sys_refcursor;
exec get_project_drf_history(3345, :results);
print :results;
Being new to both oracle and the Sql Developer tool, I am struggling to understand what is the mistake here. I cannot check this in Sql*Plus because I dont have the password to do so. I am using Oracle Sql Developer 1.1.2.25 and Oracle 10g.
Can anybody help me out please? Thank you in advance.
Sammy,
The variable declaration should be refcursor instead of sys_refcursor.
Also when you print the results, you are printing the variable itself, so there is no need for a : (which is used to indicateit is a bind variable).
I was able to run the following script sucessfully in SQL Developer (and of course sql plus.)
For SQL Developer, run it as a script using F5.
--Creating Procedure
create or replace procedure test_ref(
i_limit number,
o_results out sys_refcursor
) is
begin
open o_results for
'select object_name
from all_objects
where rownum < ' || i_limit;
end;
/
And then the script that calls this procedure. (excute as a script using F5).
var c1 refcursor;
exec test_ref(10,:c1);
print c1;
here is a working example, declare the refcursor then assign the value by calling you proc in an anonymous block.
then you print it
var x REFCURSOR ;
declare
/*a no cleanup procedure*/
procedure GetMeMyRefCursor(outter out nocopy sys_refcursor)
as
begin
open outter for
select level
from dual
connect by level <= 5;
end GetMeMyRefCursor;
begin
GetMeMyRefCursor(:x);
/*note you pass in the refcursor you created via the :X*/
end ;
/
print x;
/*now print it*/
/*LEVEL
----------------------
1
2
3
4
5*/
based on comment:
now using your comment, you are having an issue with IN/OUT params and not with the print (didn't read the title just the question and the other response)
this works: (based on your code)
create or replace
PROCEDURE GET_PROJECT_DRF_HISTORY
( projectId IN NUMBER,
resultset_out OUT sys_refcursor
) AS
BEGIN
OPEN resultset_out for
SELECT level from dual connect by level <= projectId;
/* DBMS_OUTPUT.PUT_LINE(resultset_out);*/
END GET_PROJECT_DRF_HISTORY;
/
var results REFCURSOR;
--this needs to be REFCURSOR (at least in 10g and 11i)
exec GET_PROJECT_DRF_HISTORY(5, :results);
print results;
/
You can also debug packages and procedures directly from SQL Developer (this can be a real life saver)
if you want to debug in SQL Developer it is really easy:
in the connections->your schema here-->procedures -> GET_PROJECT_DRF_HISTORY right click and 'Compile for debug'. Then in the procedure place a break point in it, then right click and 'debug' it (this will create an anonymous block -- see below -- where you can put in your values and such)
DECLARE
PROJECTID NUMBER;
RESULTSET_OUT sys_refcursor;
BEGIN
PROJECTID := NULL;
GET_PROJECT_DRF_HISTORY(
PROJECTID => PROJECTID,
RESULTSET_OUT => RESULTSET_OUT
);
-- Modify the code to output the variable
-- DBMS_OUTPUT.PUT_LINE('RESULTSET_OUT = ' || RESULTSET_OUT);
END;
(http://www.oracle.com/technetwork/developer-tools/sql-developer/sqldeveloperwhitepaper-v151-130908.pdf page 11)
otherwise, the error doesn't look as it should appear if you are doing this all from Developer.
But what I really think is happening is your VAR is incorrect and thus it doesn't exists!
variable results sys_refcursor;
Usage: VAR[IABLE] [ <variable> [ NUMBER | CHAR | CHAR (n [CHAR|BYTE]) |
VARCHAR2 (n [CHAR|BYTE]) | NCHAR | NCHAR (n) |
NVARCHAR2 (n) | CLOB | NCLOB | REFCURSOR |
BINARY_FLOAT | BINARY_DOUBLE ] ]
so, going from my initial example "var x REFCURSOR ;" should work
I recommend asking your administrator to upgrade your SQL Developer version. Yours is significantly outdated and you may be running into some obscure bugs. (I did when I tried to use version 1) You should be on 2.1 by now.