I have a table in an Oracle 12c databse called testimonial that has content as a column. I have created a stored search procedure to find testimonials whose content matches an input string that is defined as:
CREATE OR REPLACE PROCEDURE Search_Testimonials
(keyword IN VARCHAR2,
output OUT SYS_REFCURSOR)
AS
BEGIN OPEN output
FOR SELECT *
FROM Testimonial T
WHERE T.content LIKE keyword;
END;
/
VAR output REFCURSOR;
DECLARE
keyword VARCHAR2(15) := '%like%';
BEGIN
Search_Testimonials(keyword, :output);
END;
/
I am trying to run a test on this procedure using the input 'like'. From what I have found on this site and other sites I should run the following:
var output refcursor;
exec Search_Testimonials('like', output);
print output;
However my output is just:
OUTPUT
------
When it should display all the records in testimonial table as they all contain the word 'like.'
Am I messing up something in the procedure? I've looked around and this seems to be how to do it as far as I can figure. Thanks!
Related
I want to create a function that takes some code as an input (e.g. Select * FROM SOME_TABLE) and returns the result of a query as an output.
I want to use it in procedures in order to return tables as a result.
It should look like this:
BEGIN
--some procedure code
CREATE TABLE SOME_TABLE as Select * FROM ...;
Select * FROM table(my_function('Select * FROM SOME_TABLE'));
END;
Important tips:
The resulting table can have multiple columns, from 1 to +inft
The resulting table can have multiple rows, from 1 to +inft
So the size of a table can be both very small or very large.
The input query can have several where, having, partition, and other Oracle constructions.
I want to have a table as an output, not DBMS_OUTPUT.
I can't install any modules/applications, or use other languages hints. However, I can manually create types, functions, procedures.
I tried to search in the net but could not find a solution that meets all my expectations. The best link I've found was this:
https://sqljana.wordpress.com/2017/01/22/oracle-return-select-statement-results-like-sql-server-sps-using-pipelined-functions/
DBMS_SQL.RETURN_RESULT works if your "code" is a select query
DECLARE
l_cur SYS_REFCURSOR;
l_query VARCHAR2(4000) := 'select * from SOME_TABLE';
BEGIN
OPEN l_cur for l_query;
DBMS_SQL.RETURN_RESULT(l_cur);
END;
/
you can create a function that has a string as parameter and return a cursor.
select statement you should pass as a string. in a function you can open a Cursor.
declare
v_sql varchar2(100) := 'select 1,2,3,4,5 from dual';
cur_ref SYS_REFCURSOR;
function get_data(in_sql in varchar2) return SYS_REFCURSOR
as
cur_ret SYS_REFCURSOR;
begin
OPEN cur_ret FOR in_sql;
return cur_ret;
end;
begin
:cur_ref := get_data(v_sql);
end ;
if your select statement is longer than 32K than you maybe should use a clob instead of varchar2 for your Parameter type. But you have to try that
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))';
Use Oracle database and PL/SQL. I created procedure that generete XML output from table in my base. But, also, need reverse procedure that can put XML output back to table. Finding function to generate XML from table was easy (dbms_xmlgen.getXML). But I cannot find reverse function. Please, write here if you know reverse function.
To XML:
create or replace
PROCEDURE xml_apt
AS
doc clob;
BEGIN
doc := dbms_xmlgen.getXML('select * from аpt');
dbms_output.put_line(doc);
END xml_apt;
You could use DBMS_XMLSave
see: ORACLE Documentation
Probably something like this to update a row....(untested)
PROCEDURE yourTableHere_UPDATE (xmlDoc in clob, ret OUT number)
IS
updCtx DBMS_XMLSave.ctxType;
BEGIN
updCtx := DBMS_XMLSave.newContext('yourTableHere');
DBMS_XMLSave.setignorecase(updCtx,1);
DBMS_XMLSave.setrowtag(updCtx,'yourrowtag');
DBMS_XMLSave.clearUpdateColumnList(updCtx);
DBMS_XMLSave.setKeyColumn(updCtx,'ID');
ret := DBMS_XMLSave.updateXML(updCtx,xmlDoc);
DBMS_XMLSave.closeContext(updCtx);
commit;
END;
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.
I'm attempting to write a stored proc that takes in a number, n, and returns the first n results for a given query, exclusively locking those n rows. I'm a little new to SQL and I'm having a bit of difficulty matching data types correctly.
My package spec looks like this:
PACKAGE package IS
Type out_result_type is REF CURSOR;
PROCEDURE stored_proc
(in_n IN NUMBER DEFAULT 10,
out_list IN OUT out_result_type);
I then define the cursor in the procedure body, like so:
CURSOR OUT_RESULT_TYPE IS
SELECT a.id
FROM schema.table a
WHERE (some conditions) AND rownum <= in_n;
A bit later on I then try to extract the results of the cursor into the output variable:
OPEN OUT_RESULT_TYPE;
FETCH OUT_RESULT_TYPE INTO out_list; -- error on this line
CLOSE OUT_RESULT_TYPE;
But alas this code doesn't compile; oracle complains that out_list has already been defined with a conflicting data type. Any idea how I can resolve this issue? It's driving me crazy!
Thanks in advance.
CREATE OR REPLACE PACKAGE pkg_test
AS
TYPE tt_cur IS REF CURSOR;
PROCEDURE prc_cur (retval OUT tt_cur);
END;
CREATE OR REPLACE PACKAGE BODY pkg_test
AS
PROCEDURE prc_cur (retval OUT tt_cur)
AS
BEGIN
OPEN retval
FOR
SELECT *
FROM dual;
END;
END;
If you want to lock, use:
CREATE OR REPLACE PACKAGE BODY pkg_test
AS
PROCEDURE prc_cur (retval OUT tt_cur)
AS
BEGIN
OPEN retval
FOR
SELECT a.id
FROM schema.table a
WHERE (some conditions)
AND rownum <= in_n
ORDER BY
column
-- Never forget ORDER BY!
FOR UPDATE;
END;
END;
Two remarks:
A cursor doesn't lock.
You don't have to do Type out_result_type is REF CURSOR;, use default type sys_refcursor. See here: Oracle - How to have an out ref cursor parameter in a stored procedure?
Your out_list must be of wrong type. Consider (script run on 10.2.0.3):
CREATE TABLE t AS SELECT ROWNUM ID FROM all_objects WHERE ROWNUM <= 100;
CREATE OR REPLACE PACKAGE cursor_pck AS
TYPE out_result_type is REF CURSOR;
PROCEDURE stored_proc (p_in IN NUMBER DEFAULT 10,
p_out_list IN OUT out_result_type);
END cursor_pck;
/
If you want to select and lock the rows at the same time you would use the FOR UPDATE clause:
CREATE OR REPLACE PACKAGE BODY cursor_pck AS
PROCEDURE stored_proc (p_in IN NUMBER DEFAULT 10,
p_out_list IN OUT out_result_type) IS
BEGIN
OPEN p_out_list FOR SELECT a.id FROM t a WHERE ROWNUM <= p_in FOR UPDATE;
END stored_proc;
END cursor_pck;
/
With the following setup, you will call the procedure like this:
SQL> SET SERVEROUTPUT ON;
SQL> DECLARE
2 l_cursor cursor_pck.out_result_type;
3 l_id t.id%TYPE;
4 BEGIN
5 cursor_pck.stored_proc(3, l_cursor);
6 LOOP
7 FETCH l_cursor INTO l_id;
8 EXIT WHEN l_cursor%NOTFOUND;
9 dbms_output.put_line(l_id);
10 END LOOP;
11 END;
12 /
1
2
3
PL/SQL procedure successfully completed
This is not going to work the way it's written, because
out_list expects a cursor, not a cursor result.
The name out_result_type is already used for a type, so you can't redefine it to be a cursor in the same scope.
Oracle provides a pre-defined weak reference cursor: sys_refcursor. In usage it would look like:
CREATE OR REPLACE PACKAGE pkg_test
AS
PROCEDURE prc_cur (p_retval OUT sys_refcursor,
p_lookup IN VARCHAR2);
END pkg_test;
CREATE OR REPLACE PACKAGE BODY pkg_test
AS
PROCEDURE prc_cur(p_retval OUT sys_refcursor
p_lookup IN VARCHAR2)
IS
BEGIN
OPEN retval FOR SELECT a.value
FROM tblname a
WHERE a.id <= p_lookup;
END prc_cur;
END pkg_test;
This saves you the trouble of needing to declare a type. The sys_refcursor is a pointer to a result set from an open cursor. If you are familiar with Java, it's the same concept as the java.sql.ResultSet object which provides a way to get at the results of a query.