Dynamic call to Library procedure.
I am having a pll which has three procedures.
I want to call a procedure in that library whose name is decided at form runtime.
Any idea on how this can be done.
Regards
Kaustubh
<p>If the code can be stored in a database procedure/function, you could use the EXECUTE IMMEDIATE database side instruction to handle dynamic SQL orders.</p>
Francois
Similar Messages
-
Got error when call standard library in form personalizations
There is a standard library OEXOEFRM attached to from OEXOEORD. Now I tried to call a procedure in libary with form personalizations, but got failed.
Action: Builtin
Builtin type :execute procedure
Argument: begin OE_SCHEDULE_ACCESS.SET_SCHEDULE_ACTION ('para1','para2'); end
When 'apply now', got the error "....could not be evaluated becuase of error ORA-06550: line 3, column 1: PLS-00201:'OE_SCHEDULE_ACCESS.SET_SCHEDULE_ACTION' must be declared.
My question is how to call form library procedure in form personalizations? What builtin type should be used and any extra steps need to be done?
Is there any documents on oracle metalink specific to this issue?
Thank you very much for your help.Forms personalization is described in detail in ML Note 279034.1.
Limitations of personalizations are in note 420518.1
HTH
Srini Chavali -
Calling SQL stored procedure dynamically
Hallo,
could anybody tell me how to call HANA SQL stored procedure dynamically?
The coding looks like this:
v_ProcedureName := '"' || KpiNamespace || '::' || KpiName || '"';
v_SQL := 'CALL ' || :v_ProcedureName || '( lt_outKPI )';
EXEC :v_SQL;
For this call I get the error message:
"Transaction rolled back by an internal error: wrong number or types of parameters in call: Physical table is not allowed in OUT table variable position: LT_OUTKPI: line 1 col 55 (at pos 54)"
The procedure to be called dynamically has a table output parameter.
Thanks in advance,
Best Regards,
Alexey Romanov.
Hi Alex,
Can you share your requirement on exactly what is the need to call the procedure dynamically?
For your question, have a look on the below:
1) Have a procedure named EMPLOYEE_DETAILS
http://scn.sap.com/servlet/JiveServlet/downloadImage/2-14895702-415799/236-170/pastedImage_0.png
2) Created one more procedure named Dynamically as shown below:
CREATE PROCEDURE Dynamically ()
AS
BEGIN
DECLARE QUERY VARCHAR(1000);
QUERY := 'call EMPLOYEE_DETIALS(?)';
EXECUTE IMMEDIATE (:QUERY);
END;
3) Output:
http://scn.sap.com/servlet/JiveServlet/downloadImage/2-14895702-415800/210-189/pastedImage_3.png
Regards,
Krishna Tangudu
Hi Krishna,
Thanks for your reply!
Unfortunately, I can neither go to ‘full discussion’, nor open the pictures, you have attached, nor see you reply.
That’s why I just add my reply to the problem description.
The procedure name is composed out of 2 parts on-the-fly, that is why I have to call it dynamically:
create local temporary table "#KPIEvals"(
"KpiNamespace" NVARCHAR(256) CS_STRING,
"KpiName" NVARCHAR(32) CS_STRING,
"KpiText" NVARCHAR(256) CS_STRING,
"Responsible" NVARCHAR(256) CS_STRING );
FOR cur_row as c_cursor DO
v_SQL := '';
v_ProcedureName := '"' || cur_row."KpiNamespace" || '::' || cur_row."KpiName" || '"';
v_SQL := 'CALL ' || :v_ProcedureName || '( lt_outKPI )';
EXEC :v_SQL;
v_SQL := 'INSERT INTO "#KPIEvals" SELECT * FROM :lt_out_kpi';
EXEC :v_SQL;
END FOR;
I guess there might be 2 reasons for the problem:
1. All the procedures are called dynamically in a loop.
2. All the procedures have an output parameter, which is a table.
Hope that helps,
Best Regards,
Alex.Hi Alexey, I think what you may need to do in this case is to do the insert into your temp table from within the dynamically called procedure, therefore no need for output param in your procedure call. You can then select from the temp table in your main procedure. Hope that makes sense.
Peter -
Call a custom procedure in release 2
How do I call a custom procedure as an HTML form action. I am using release 2. I have a proceudre in my table that runs an update statement when I submit the form. I can't get the form to properly call the procedure. Anyone Know.
Thanks
Calwhy don't you create a dynamic page & just call that custom procedure inside.
as you know your dynamic page will give you url to call from HTML forms action.
/pls/portal/.......
vikas -
Calling a stored procedure from within a ViewObject
Is it possible to make stored procedure call from within a BC4J ViewObject? Basically something like this:
select * from table(f1(3)); where f1 is a table function. Using Oracle's pipelined table functions?
If not, is it possible to call a stored procedure from Java and have the returned results be put back into a BC4J RowSet.
In addition, is there a way to create a JDBC Resultset from a BC4J RowSet?
We need to be able to dynamically create our SQL statements (the entire SQL, not just the where clause) but are required to have these sql statements generated/executed from within a pl/sql stored procedure in the database.Is it possible to make stored procedure call from within a BC4J ViewObject? Basically something like this:
select * from table(f1(3)); where f1 is a table function. Using Oracle's pipelined table functions?
Yes. Using our expert-mode query feature this is possible.
is it possible to call a stored procedure from Java and have the returned results be put back into a BC4J RowSet.
Yes. See this article about basing a view object on a REF CURSOR:
http://radio.weblogs.com/0118231/2003/03/03.html
In addition, is there a way to create a JDBC Resultset from a BC4J RowSet?
No. Not directly. What's the business requirement here so I can understand better?
We need to be able to dynamically create our SQL statements (the entire SQL, not just the where clause) but are required to have these sql statements generated/executed from within a pl/sql stored procedure in the database.
REF CURSOR would work fine, or if it's just the statement that needs to be generated dynamically, you could fetch the text of the SQL statement from the stored procedure, then use createViewObjectFromQueryStmt(). Although this has runtime overhead involved with describing the query.
The REF CURSOR based approach is probably best for this. -
How to call a Stored Procedure with a REF CURSOR output parameter
I am looking forward an example that call a stored function/procedure with a REF CURSOR output parameter and get the result.
In other words, I have a stored function/procedure that execute a SELECT statement using the OCI library and then it could get the values of each column and each row.
I put a code snippet, it have only the main thing to call a simple stored procedure and print the name of each column of the cursor, but I couldn´t to print out the values in the table that call the stored procedure.
I understand that the next step, it is to call a OCIStmtFetch.
How to associate the cursor with the OCIStmtFetch?
If you need more information, only tell me.
I am using ANSI C with HP-UX Operative System (C for HP-UX) and Oracle 10g.
Regards.
Antonio Garcia
/* callOracleSP */
#include <stdio.h>
#include <string.h>
#include <oci.h>
#include <stdlib.h>
char* pConnectChar ="server";
char* pUsernameChar = "user";
char* pPasswordChar = "passwd";
char* sqlCharArray1 = "BEGIN SP_GETCITIES(:s, :c); END;";
int retval;
ub4 parmcnt=0;
ub4 pos2=0;
text *pcoln[20];
ub4 namelen[20];
char state_key[5];
OCIStmt* pOciStatement;
OCIStmt* pOciStatCursor;
OCIError* pOciError;
OCIEnv* pOciEnviron;
OCIServer* pOciServer;
OCISession* pOciSession;
OCISvcCtx* pOciServiceContext;
OCIBind* pOciBind[500];
OCIParam* pOciParam;
int main()
retval = OCIEnvCreate(&pOciEnviron, OCI_DEFAULT, NULL, NULL, NULL, NULL,0,NULL);
retval = OCIEnvInit(&pOciEnviron, OCI_DEFAULT, 0, NULL);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciError, OCI_HTYPE_ERROR, 0, NULL);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciServiceContext, OCI_HTYPE_SVCCTX, 0, NULL);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciStatement, OCI_HTYPE_STMT, 0, NULL);
retval = OCILogon(pOciEnviron,pOciError,&pOciServiceContext,(unsigned char *)pUsernameChar,
strlen(pUsernameChar), (unsigned char *)pPasswordChar, strlen(pPasswordChar),
(unsigned char *)pConnectChar,strlen(pConnectChar));
printf("OCILogon retval=%d\n",retval);
retval = OCIStmtPrepare(pOciStatement, pOciError, (unsigned char *)sqlCharArray1,strlen(sqlCharArray1),
OCI_NTV_SYNTAX, OCI_DEFAULT);
printf("StmtPrepare retval=%d\n",retval);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciStatCursor, OCI_HTYPE_STMT, 0, NULL);
retval = OCIBindByPos(pOciStatement,&pOciBind[0], pOciError, (ub4) 1, (void *)&state_key,
(sb4) sizeof(state_key), SQLT_STR, (void *) 0, (ub2 *) 0, (ub2 *)0,(ub4)0, (ub4 *)0, (ub4) OCI_DEFAULT);
printf("BindByPos OCI_HTYPE_STMT retval=%d\n",retval);
retval = OCIBindByPos(pOciStatement,&pOciBind[1], pOciError, (ub4) 2, (void *)&pOciStatCursor,
(sb4) 0, SQLT_RSET, (void *) 0, (ub2 *) 0, (ub2 *)0,(ub4)0, (ub4 *)0, (ub4) OCI_DEFAULT);
printf("BindByPos OCI_HTYPE_STMT retval=%d\n",retval);
strcpy(state_key,"CA");
retval = OCIStmtExecute(pOciServiceContext, pOciStatement, pOciError, (ub4)1, (ub4) 0,
(OCISnapshot *)NULL, (OCISnapshot *)NULL, (ub4) OCI_DEFAULT);
printf("StmtExecute retval=%d\n",retval);
/* How to get the values of the cursor? */
/* Get number of parameters of the Cursor */
OCIAttrGet((void *) pOciStatCursor, (ub4)OCI_HTYPE_STMT, (void*) &parmcnt,(ub4 *) 0,
(ub4)OCI_ATTR_PARAM_COUNT, pOciError);
printf("\nNumber of parameters of the cursor = %d\n",parmcnt);
for (int pos = 1; pos <= (int)parmcnt; pos++)
OCIAttrGet((void *) pOciStatCursor, (ub4)OCI_HTYPE_STMT, (void*) &pos2,(ub4 *) 0,
(ub4)OCI_ATTR_CURRENT_POSITION, pOciError);
retval = OCIParamGet((void *)pOciStatCursor, (ub4)OCI_HTYPE_STMT, pOciError, (void **)&pOciParam,
(ub4) pos );
OCIAttrGet((void*) pOciParam, (ub4) OCI_DTYPE_PARAM,(void*) &pcoln[pos-1],(ub4 *) &namelen[pos-1],
(ub4) OCI_ATTR_NAME,(OCIError *)pOciError );
for (int i = 1; i <=(int)parmcnt; i++)
printf("Column %i\tNAME = %.*s\n",i,namelen[i-1],pcoln[i-1]);
return 0;
This is the script that create the table, insert records and create the stored procedure
CREATE TABLE CITIES (
STATE_CODE VARCHAR2(2) NULL,
CITY_CODE NUMBER(15,5) NULL,
CITY_NAME VARCHAR2(30) NULL
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('CA', 30, 'SAN DIEGO')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('CA', 40, 'SACRAMENTO')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('FL', 10, 'MIAMI')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('FL', 20, 'ORLANDO')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('NY', 10, 'NEW YORK')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('NY', 20, 'ALBANY')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('CA', 10, 'LOS ANGELES')
INSERT INTO CITIES(STATE_CODE, CITY_CODE, CITY_NAME)
VALUES('CA', 20, 'SAN FRANCISCO')
CREATE OR REPLACE PACKAGE globalPkg AUTHID CURRENT_USER AS
/* The following are T/SQL specific global variables. */
TYPE RCT1 IS REF CURSOR;/*new weak cursor definition*/
END globalPkg;
CREATE OR REPLACE PROCEDURE SP_ADDCITY(
P_STATE_CODE IN VARCHAR,
P_CITY_CODE IN NUMBER,
P_CITY_NAME IN VARCHAR2,
P_RETURN IN OUT NUMBER)
AS
StoO_error INTEGER;
StoO_selcnt INTEGER;
StoO_rowcnt INTEGER;
StoO_errmsg VARCHAR2(255);
BEGIN
StoO_rowcnt := 0;
StoO_error := 0;
StoO_selcnt := 0;
P_RETURN := 0;
INSERT INTO CITIES (STATE_CODE, CITY_CODE, CITY_NAME)
VALUES (P_STATE_CODE, P_CITY_CODE, P_CITY_NAME);
StoO_rowcnt := SQL%ROWCOUNT;
EXCEPTION
WHEN TOO_MANY_ROWS THEN
StoO_rowcnt := 2;
WHEN OTHERS THEN
StoO_rowcnt := 0;
StoO_selcnt := 0;
StoO_error := SQLCODE;
StoO_errmsg := SQLERRM;
IF StoO_error != 0 THEN
BEGIN
P_RETURN := 1;
RETURN;
END;
END IF;
END;
CREATE OR REPLACE PROCEDURE SP_GETCITIES(
STATE_KEY IN VARCHAR,
RC1 IN OUT globalPkg.RCT1)
AS
StoO_error INTEGER;
StoO_selcnt INTEGER;
StoO_rowcnt INTEGER;
StoO_errmsg VARCHAR2(255);
BEGIN
StoO_rowcnt := 0;
StoO_error := 0;
StoO_selcnt := 0;
OPEN RC1 FOR
SELECT STATE_CODE, CITY_CODE, CITY_NAME
FROM CITIES
WHERE STATE_CODE = STATE_KEY
ORDER BY CITY_CODE;
StoO_rowcnt := SQL%ROWCOUNT;
EXCEPTION
WHEN OTHERS THEN
StoO_rowcnt := 0;
StoO_error := SQLCODE;
StoO_errmsg := SQLERRM;
END;
/Hi Mark,
Thanks for your recommendations.
I change the code with OCIDefineByPos, one for each parameter from cursor and then use the OCIStmtFetch.
I don´t receive a error when call OCIDefineByPos, but when I call OCIStmtFetch receive a -1 error number.
What is wrong with the code?
The script is the same.
I need your help!
Best Regards!
Antonio Garcia (Mexico)
This the new code:
#include <stdio.h>
#include <string.h>
#include <oci.h>
#include <stdlib.h>
char* pConnectChar ="ORAC617";
char* pUsernameChar = "C617_005_DBO_01";
char* pPasswordChar = "Tempora1";
char* sqlCharArray1 = "BEGIN SP_GETCITIES(:s, :c); END;";
int retval;
ub4 parmcnt=0;
ub4 pos2=0;
sb2 *c_indp;
text *pcoln[20], *name,*name2;
ub4 namelen[20],len;
ub2 type,size;
char state_key[5];
OCIDefine *pdef;
OCIBind *p_bnd;
ub1 **c_buf;
OCIStmt* pOciStatement; /* Statement handle */
OCIStmt* pOciStatCursor; /* Statement handle */
OCIError* pOciError; /* Error handle */
OCIEnv* pOciEnviron; /* Environment handle */
OCIServer* pOciServer; /* Server handle */
OCISession* pOciSession; /* Session handle */
OCISvcCtx* pOciServiceContext; /* Service Context handle */
OCIBind* pOciBind[500]; /* Bind handle */
OCIParam* pOciParam; /* Param handle */
int OCI_Fetch(OCIStmt *p_select,OCIError *p_err, int *piOcc)
int iOcc, rc;
rc=OCIStmtFetch(p_select,p_err,1,OCI_FETCH_NEXT,OCI_DEFAULT);
printf("rc fetch %i",rc);
if(rc==0&&piOcc!=NULL){
printf("entro al if");
iOcc=*piOcc;
*piOcc=iOcc+1;
return rc;
int main()
int pos,i=0,rc;
retval = OCIEnvCreate(&pOciEnviron, OCI_DEFAULT, NULL, NULL, NULL, NULL,0,NULL);
printf("EnvCreate retval=%d\n", retval);
retval = OCIEnvInit(&pOciEnviron, OCI_DEFAULT, 0, NULL);
printf("EnvInit retval=%d\n",retval);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciError, OCI_HTYPE_ERROR, 0, NULL);
printf("HandleAlloc OCI_HTYPE_ERROR retval=%d\n",retval);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciServiceContext, OCI_HTYPE_SVCCTX, 0, NULL);
printf("HandleAlloc OCI_HTYPE_SVCCTX retval=%d\n",retval);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciStatement, OCI_HTYPE_STMT, 0, NULL);
printf("HandleAlloc OCI_HTYPE_STMT retval=%d\n",retval);
retval = OCILogon(pOciEnviron,pOciError,&pOciServiceContext,(unsigned char *)pUsernameChar,
strlen(pUsernameChar), (unsigned char *)pPasswordChar, strlen(pPasswordChar),
(unsigned char *)pConnectChar,strlen(pConnectChar));
printf("OCILogon retval=%d\n",retval);
retval = OCIStmtPrepare(pOciStatement, pOciError, (unsigned char *)sqlCharArray1,strlen(sqlCharArray1),
OCI_NTV_SYNTAX, OCI_DEFAULT);
printf("StmtPrepare retval=%d\n",retval);
retval = OCIHandleAlloc(pOciEnviron, (void **)&pOciStatCursor, OCI_HTYPE_STMT, 0, NULL);
printf("HandleAlloc OCI_HTYPE_STMT retval=%d\n",retval);
retval = OCIBindByPos(pOciStatement,&pOciBind[0], pOciError, (ub4) 1, (void *)&state_key,
(sb4) sizeof(state_key), SQLT_STR, (void *) 0, (ub2 *) 0, (ub2 *)0,(ub4)0, (ub4 *)0, (ub4) OCI_DEFAULT);
printf("BindByPos OCI_HTYPE_STMT retval=%d\n",retval);
retval = OCIBindByPos(pOciStatement,&pOciBind[1], pOciError, (ub4) 2, (void *)&pOciStatCursor,
(sb4) 0, SQLT_RSET, (void *) 0, (ub2 *) 0, (ub2 *)0,(ub4)0, (ub4 *)0, (ub4) OCI_DEFAULT);
printf("BindByPos OCI_HTYPE_STMT retval=%d\n",retval);
strcpy(state_key,"CA");
retval = OCIStmtExecute(pOciServiceContext, pOciStatement, pOciError, (ub4)1, (ub4) 0,
(OCISnapshot *)NULL, (OCISnapshot *)NULL, (ub4) OCI_DEFAULT);
printf("StmtExecute retval=%d\n",retval);
c_buf=(ub1 **)calloc(sizeof(ub1 *),3);
c_indp=(sb2 *)calloc(sizeof(sb2 *),3);
// Get number of parameters of the Cursor
OCIAttrGet((void *) pOciStatCursor, (ub4)OCI_HTYPE_STMT, (void*) &parmcnt,(ub4 *) 0,
(ub4)OCI_ATTR_PARAM_COUNT, pOciError);
printf("\nNumber of parameters of the cursor = %d\n",parmcnt);
for (pos = 1; pos <= (int)parmcnt; pos++)
OCIAttrGet((void *) pOciStatCursor, (ub4)OCI_HTYPE_STMT, (void*) &pos2,(ub4 *) 0,
(ub4)OCI_ATTR_CURRENT_POSITION, pOciError);
retval = OCIParamGet((void *)pOciStatCursor, (ub4)OCI_HTYPE_STMT, pOciError, (void **)&pOciParam,(ub4) pos );
// Get the column name
OCIAttrGet((void*) pOciParam, (ub4) OCI_DTYPE_PARAM,(void*) &name,(ub4 *) &len, (ub4) OCI_ATTR_NAME,(OCIError *)pOciError );
// Get the column datatype
OCIAttrGet((void*) pOciParam, (ub4) OCI_DTYPE_PARAM,(void*) &type,(ub4 *)0,(ub4)OCI_ATTR_DATA_TYPE,(OCIError *)pOciError);
// Get the column size
OCIAttrGet((void*) pOciParam, (ub4) OCI_DTYPE_PARAM,(void*) &size,(ub4 *)0,(ub4)OCI_ATTR_DATA_SIZE,(OCIError *)pOciError);
printf("Column %i\tNAME = %.*s \ttype %d \tsize %d\n",pos,len,name,type,size);
// OCIDefine ByPos, one for each parameter
// c_buf store the STATE_CODE, CITY_CODE and CITY_NAME columns from the cursor
rc=OCIDefineByPos(pOciStatCursor,&pdef,(OCIError *)pOciError,pos,c_buf[pos-1],size+1,(ub2)type,(dvoid *)c_indp[pos-1],(ub2 *)0,(ub2 *)0,OCI_DEFAULT);
printf("OCIDefineByPos retval=%d\n,rc);
// call OCIStmtFetch. In the next line, I receive the error
rc=OCIStmtFetch(pOciStatCursor,pOciError,1,OCI_FETCH_NEXT,OCI_DEFAULT);
printf("rc fetch %i",rc);
return 0;
{code} -
Dynamic call for a ref cursor: ORA-21779
Hi,
Here is an environment:
create or replace
PACKAGE PKG_GETDATA AS
TYPE cursor_type IS REF CURSOR;
Procedure SimpleGet (cData In Out Cursor_type);
Procedure DynamicGet (cData In Out Cursor_type);
END PKG_GETDATA;
create or replace
PACKAGE BODY "PKG_GETDATA" AS
Procedure SimpleGet (cData In Out Cursor_type) As
Begin
Open cData For
Select 1 from Dual;
End SimpleGet;
Procedure DynamicGet (cData In Out Cursor_type) As
Begin
Execute Immediate 'Begin PKG_GETDATA.SIMPLEGET(:1); End;'
Using In Out cData;
End DynamicGet;
END PKG_GETDATA;
So- first simple get works fine:
Declare
cData PKG_GETDATA.Cursor_type;
aNumber Number;
Begin
PKG_GETDATA.SimpleGet (cData);
LOOP
FETCH cData INTO aNumber;
EXIT WHEN cData%ROWCOUNT > 5 OR cData%NOTFOUND;
dbms_output.put_line (aNumber);
END LOOP;
close cData;
End;
BUT dynamic call does not works at all!:
Declare
cData PKG_GETDATA.Cursor_type;
aNumber Number;
Begin
PKG_GETDATA.DynamicGet (cData);
LOOP
FETCH cData INTO aNumber;
EXIT WHEN cData%ROWCOUNT > 5 OR cData%NOTFOUND;
dbms_output.put_line (aNumber);
END LOOP;
close cData;
End;
It throws ORA-21779 exception; what is more- it does work on 10.2 db version but does not work on 11.2 version! Could anyone explain that?
Regards
Bartlomiej D.Hi,
Believe me, it may be very handful while working with handlers.
Anyway- could anyone help me on that?
Regards
Bartlomiej D. -
Strange download size of on calling packaged stored procedure in VB6
Hi,
I tried to use VB6 to call oracle stored procedure with ref cursor as output parameter under a package in 10g database (10.1.03). Oracle client uses windows 9.2 / 10.1.02 (Oracle OLEDB Provider) . I found that when the package size increases(> 1000 lines codes), the data size transfer from database to VB client also increases. I try to trap the binary data flow between VB6 and database when calling packaged stored procedure. I found that VB6(or oracle client ??) will first download package spec then execute the requested stored procedure. This may explain the cause of increasing size.
However, this large download size for calling only one of the procedure will make my application run slowly when my application uses the package much. How can I solve this problem ? Does this relate to oracle client(p.s. this problem disappear when using Microsoft OLEDB Provider)?
Thanks
StevenYou can use a wrapper to get compiled code and if it's 10g you can do even more by putting it in a library.
OLEDB from VB6 still using Oracle 'Client' as you call Oracle NET. -
Calling PLSQL Stored Procedure From HTML Form Submit Button
Hi there,
I am having a little difficulty with calling a stored procedure using an html form button. Here is the code I have right now...
HTP.PRINT('<form action=ZWGKERCF.P_confdelete>');
HTP.PRINT('<input type=''submit'' value='' Yes '' onClick=''document.getElementById("mypopup").style.display="none"''>');
HTP.PRINT('</form></div>');Here is the issue - I need to find a way to pass variables to this stored procedure so it know what data to operate on. This stored procedure will delete data for a specific database record and I must pass three variables to this procedure to make it work.
Lets call them class_number, term, conf These three variables will be passed and the data will be deleted and the person will see a confirmation screen once the delete query has been executed.
So ideally I would want: ZWGKERCF.P_confdelete(class_number, term, conf) and then the stored procedure would handle the rest!
Seems pretty simple but I am not sure how to make this happen... My thoughts were:
Pass the data to this html form (the three fields I need) in hidden variables. Then somehow pass these using POST method to the procedure and read using GET?
Can someone clarify what the best way to do this is? I have a feeling its something small I am missing - but I would really like some expert insight :-)
Thanks so much in advance!
- Jeff795018 wrote:
I am having a little difficulty with calling a stored procedure using an html form button. Here is the code I have right now...
HTP.PRINT('<form action=ZWGKERCF.P_confdelete>');
HTP.PRINT('<input type=''submit'' value='' Yes '' onClick=''document.getElementById("mypopup").style.display="none"''>');
HTP.PRINT('</form></div>');Here is the issue - I need to find a way to pass variables to this stored procedure so it know what data to operate on. This stored procedure will delete data for a specific database record and I must pass three variables to this procedure to make it work. The browser generates a POST or a GET for that form action, that includes all the fields defined in that form. Let's say you define HTML text input fields name and surname for the form. The URL generated for that form's submission will be:
http://../ZWGKERCF.P_confdelete?name=value1&surname=value2The browser therefore submits the values of the form as part of the URL.
The web server receives this. It sees that the base URL (aka location) is serviced by Oracle's mod_plsql. It passes the URL to this module. This module builds a PL/SQL block and makes the call to Oracle. If we ignore the additional calls it makes (setting up an OWA environment for that Oracle session), this is how the call to Oracle basically looks like:
begin
ZWGKERCF.P_confdelete( name=> :value1, surname => :value2 );
end;Thus the PL/SQL web enabled procedure gets all the input fields from the HTML form, via its parameter signature. As you can define parameter values with defaults, you can support variable parameter calls. For example, let's say our procedure also have a birthDate parameter that is default null. The above call will still work (from a HTML form that does not have a date field). And so will the following URL and call that includes a birth date:
URL:
http://../ZWGKERCF.P_confdelete?name=value1&surname=value2&birthdate=2000/01/01
PL/SQL call:
begin
ZWGKERCF.P_confdelete( name=> :value1, surname => :value2, birthdate => :value3 );
end;There is also another call method you can use - the flexible 2 parameter interface. In this case the PL/SQL procedure name in the URL is suffixed with an exclamation mark. This instructs the mod_plsql module to put all input field names it received from the web browser into a string array. And put all the values for those fields in another string array. Then it calls your procedure with these arrays as input.
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You can also defined RESTful mod_plsql calls to PL/SQL. In which case the call format from the web browser looks different and is handled differently by mod_plsql.
All this (and more) is detailed in the Oracle manuals dealing with mod_plsql - have a search via http://tahiti.oracle.com (Oracle Documentation Portal) for the relevant manuals for the Oracle version you are using.
Alternatively, simply download and install Oracle Apex (Application Express). This is a web development and run-time framework and do all the complexities for you - including web state management, optimistic locking, security and so on. -
Calling a library function node much faster than labview code?
Hi, I wrote a labview routine to perform a multiple tau autocorrelation on a large array of integers. A multi tau autocorrelation is a way to reduce the computation time of the correlation but at the expense of resolution. You can taylor the multitau correlation to give you good resolution where you need it. For instance, I require good resolution near the middle (the peak) of the correlation, so I do a linear autocorrelation for the first 64 channels from the peak, then I skip every second channel for the next 32, then skip every 4th channel for 32 more, then skip every 8th for 32 channels... etc.
Originally, I wrote my own multitau calculation, but it took several hours to perform for just 1024 channels of the correlation of around 2million points of data. I need to actually do the the correlation on probably 2 billion or more points of data, which would take days. So then I tried using labview's AutoCorrelation.vi which calls a library function. It could do a linear autocorrelation with 4 million points in less than a minute. I figured that writing my code in C and calling it using a call library function node would be faster, but that much faster?
Finally, I wrote some code that extracts the correlation data points that I would've got from my multitau code from the linear correlation function that I get from the AutoCorrelation.vi. Clearly this is not optimal, since I spend time calculating all those channels of the correlation function just to throw them away in the end, but I need to do this because the final step of my procedure is to fit the correlation function to a theoretical one. With say 2million points, the fit would take too long. The interesting thing here is that simply extracting the 1024 point from the linear autocorrelation function takes a significant amount of time. Is labview really that slow?
So, my questions are... if I rewrite my multitau autocorrelation function in C and call it using a call library function node, will it run that much faster? Can I achieve the same efficiency if I use a formula node structure? Why does it take so long just to extract 1024 points from an array?
I've tried hiding indicators and this speeds things up a little bit, but not very much.
I'll attach my code if you're interested in taking a look. There is a switch on the front panel called 'MultiTau'... if in the off position, the code performs the linear autocorrelation with the AutoCorrelation.vi, if in the on position, it performs a multitau autocorrelation using the code I wrote. Thanks for any help.
Attachments:
MultiTauAutocorrelate.vi 627 KBHi,
The C routine that AutoCorrelation.vi is using is probably a higly optimised routine. If you write a routine in LabVIEW, it should be less then 15% slower. But you'd have to know all ins and outs of LabVIEW. How data is handled, when memory is allocated, etc. Also note that the AutoCorrelation.vi has years of engineering behind it, and probably multiple programmers.
It might even be possible that the c code uses an algorithmic improvement, like the Fast Fourier Transform improves speed on the Fourier Transform. I think the autocorrelation can be done using FFT, but that isn't my thing, so I'm not sure.
For a fair comparation, posting the code in this forum was a good idea. I'm sure together we can get it to 115% or less of the C variant. (15/115 is just a guess, btw)
I'm still using LV7.1 for client compatibility, so I'll look at the code later.
Regards,
Wiebe.
"dakeddie" <[email protected]> wrote in message news:[email protected]...
Hi, I wrote a labview routine to perform a multiple tau autocorrelation on a large array of integers. A multi tau autocorrelation is a way to reduce the computation time of the correlation but at the expense of resolution. You can taylor the multitau correlation to give you good resolution where you need it. For instance, I require good resolution near the middle (the peak) of the correlation, so I do a linear autocorrelation for the first 64 channels from the peak, then I skip every second channel for the next 32, then skip every 4th channel for 32 more, then skip every 8th for 32 channels... etc. Originally, I wrote my own multitau calculation, but it took several hours to perform for just 1024 channels of the correlation of around 2million points of data. I need to actually do the the correlation on probably 2 billion or more points of data, which would take days. So then I tried using labview's AutoCorrelation.vi which calls a library function. It could do a linear autocorrelation with 4 million points in less than a minute. I figured that writing my code in C and calling it using a call library function node would be faster, but that much faster?Finally, I wrote some code that extracts the correlation data points that I would've got from my multitau code from the linear correlation function that I get from the AutoCorrelation.vi. Clearly this is not optimal, since I spend time calculating all those channels of the correlation function just to throw them away in the end, but I need to do this because the final step of my procedure is to fit the correlation function to a theoretical one. With say 2million points, the fit would take too long. The interesting thing here is that simply extracting the 1024 point from the linear autocorrelation function takes a significant amount of time. Is labview really that slow?So, my questions are... if I rewrite my multitau autocorrelation function in C and call it using a call library function node, will it run that much faster? Can I achieve the same efficiency if I use a formula node structure? Why does it take so long just to extract 1024 points from an array?I've tried hiding indicators and this speeds things up a little bit, but not very much.I'll attach my code if you're interested in taking a look. There is a switch on the front panel called 'MultiTau'... if in the off position, the code performs the linear autocorrelation with the AutoCorrelation.vi, if in the on position, it performs a multitau autocorrelation using the code I wrote. Thanks for any help.
MultiTauAutocorrelate.vi:
http://forums.ni.com/attachments/ni/170/185730/1/MultiTauAutocorrelate.vi -
Hiding button after successfull call to databse procedure
Hi,
This is my first post and my first APEX app.
I have a submit button that calls a database procedure passing parameters from the form.
The procedure then updates the database record and the page shows the update which means its successfull.
However the user can press the button again.
I do not want the user to press the button again, so i want to hide it after successful completion of the databse procedure.
I tried using Dynamic action and hide it that way by comparing the value that was updated by the database (P1_STATUS) and the
value that the user wanted it updating to (passed as a parameter to db procedure P1_PARAM) but it does not work for the button for some reason.
Is there a way round this by using javascript/apex computations etc.
Any help would be appreciated or if you could point me in the right direction
Thank youYou can also hide it with javascript:
onclick="$x_Hide(this);"However that will hide it at the outset and not when the DB procedure finishes. Don't know if that would be a functional problem for you or not. The advantage is that it will hide immediately so the user cannot press it again while the DB procedure is going. -
Rpc error calling an external procedure
I'm having a problem calling an external procedure running on Linux. The setup works using NT and a DLL, but when the function has been converted to a .so library, I get get
ORA-28575: unable to open RPC connection to external procedure agent
Now this is probaly due to my listener config since when starting the listener I get an IPC error:
Connecting to (ADDRESS=(PROTOCOL=IPC)(KEY=elvis))
TNS-12224: TNS:no listener
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (ADDRESS=(PROTOCOL=TCP)(Host=elvis)(Port=1521))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for Linux: Version 8.0.5.0.0 - Production
Start Date 20-NOV-00 18:06:42
Uptime 0 days 0 hr. 0 min. 6 sec
Trace Level admin
Security OFF
SNMP OFF
Listener Parameter File /home/oracle/ora01/app/oracle/8.0.5/network/admin/listener.ora
Listener Log File /home/oracle/ora01/app/oracle/8.0.5/network/log/listener.log
Listener Trace File /home/oracle/ora01/app/oracle/8.0.5/network/trace/listener.trc
Services Summary...
elvis has 1 service handler(s)
extproc has 1 service handler(s)
The command completed successfully
I'm using Oracle 8.0.5 and RedHat 6.0. The name of machine is elvis and the sid name is elvis as well. Any bright ideas are more than welcome
Benyour listener.ora file has problem!
it should look similiar to:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = elvis)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = <substitute with your oracle home>)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = elvis)
(ORACLE_HOME = <substitute_with_your_oralce_home>)
(SID_NAME = elvis)
please verify with net8 admin guide. you also need to set up tnsnames.ora correctly at client side.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Benjamin Sigursteinsson ([email protected]):
I'm having a problem calling an external procedure running on Linux. The setup works using NT and a DLL, but when the function has been converted to a .so library, I get get
ORA-28575: unable to open RPC connection to external procedure agent
Now this is probaly due to my listener config since when starting the listener I get an IPC error:
Connecting to (ADDRESS=(PROTOCOL=IPC)(KEY=elvis))
TNS-12224: TNS:no listener
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (ADDRESS=(PROTOCOL=TCP)(Host=elvis)(Port=1521))
STATUS of the LISTENER<HR></BLOCKQUOTE>
null -
"ORA-28578: protocol error..." before calling an external procedure
Hello,
Oracle reports this error
Error report:
SQL Error: ORA-29856: error occurred in the execution of ODCIINDEXCREATE routine
ORA-28578: protocol error during callback from an external procedure
29856. 00000 - "error occurred in the execution of ODCIINDEXCREATE routine"
*Cause: Failed to successfully execute the ODCIIndexCreate routine.
*Action: Check to see if the routine has been coded correctly.
when it tries to call an external procedure in order to create a domain index. If I implement ODCIIndexCreate in PL/SQL, it is executed successfully. If I specify that ODCIIndexCreate is implement it an external library, then I get the above error even if the library does not exist on the file system. Does anyone have an idea what might be wrong?
Regards,
Angel TsankovThis forum is about using the Studio C/C++/Fortran compilers, and programming in those languages. You seem to have a question about using SQL for access to an Oracle database, which is none of the above.
I suggest you try an Oracle database forum. Start here:
https://forums.oracle.com/forums/category.jspa?categoryID=18
Look for a forum that applies to your problem area.
Edited by: Steve_Clamage on Jun 13, 2012 8:42 AM
(Correcting the URL I posted earlier.) -
Dynamically call DBMS_XMLINDEX to drop parameter and exit with exception
Hi All,
I am trying to create a procedure to dynamically call DBMS_XMLINDEX.dropparameter.
If the parameter does not exist then gracefully exit with exception as 'Parameter does not exist'.
But I keep on getting errors due to dynamically passing.
Procedure is something like:
Create PROCEDURE drop_parameter(p_parameter IN VARCHAR2)
IS
no_parameter EXCEPTION;
PRAGMA EXCEPTION_INIT(no_parameter,-12004);
BEGIN
EXECUTE IMMEDIATE 'DBMS_XMLINDEX.dropparameter( ''||p_parameter||'') ';
dbms_output.put_line('Parameter dropped');
EXCEPTION
WHEN no_parameter THEN
dbms_output.put_line('Parameter does not exist');
END drop_parameter;
For implementaion we can try creating parameter as :
BEGIN
DBMS_XMLINDEX.REGISTERPARAMETER (
'Param1',
'PATH TABLE PathTB1
PATHS (INCLUDE ( /a/b/c
/d/e/f
END;
The above parameter should be dropped or if not existing, then exit gracefully.
Please suggest.
Thanks...You're testing the wrong error code...
ORA-12004 : http://docs.oracle.com/cd/E11882_01/server.112/e17766/e9858.htm#sthref3299
Try with ORA-44737, for example :
SQL> set serveroutput on
SQL>
SQL> BEGIN
2 DBMS_XMLINDEX.REGISTERPARAMETER (
3 'Param1', 'PATH TABLE PathTB1 PATHS (INCLUDE ( /a/b/c /d/e/f ))');
4 END;
5 /
PL/SQL procedure successfully completed
SQL>
SQL> CREATE PROCEDURE drop_parameter(p_parameter IN VARCHAR2)
2 IS
3 no_parameter EXCEPTION;
4 PRAGMA EXCEPTION_INIT(no_parameter,-44737);
5 BEGIN
6 DBMS_XMLINDEX.dropparameter(p_parameter);
7 dbms_output.put_line('Parameter dropped');
8 EXCEPTION
9 WHEN no_parameter THEN
10 dbms_output.put_line('Parameter does not exist');
11 END;
12 /
Procedure created
SQL> exec drop_parameter('Param1');
Parameter dropped
PL/SQL procedure successfully completed
SQL> exec drop_parameter('Param1');
Parameter does not exist
PL/SQL procedure successfully completed
(and again, you do not need dynamic code) -
Error Calling an external procedure
I'm calling an external procedure (provided by a third party).
When i invoke it from a client code, it functions.
When I invoke it from PL/SQL code, it gives the following error:
ORA-28576: lost RPC connection to external procedure agent.
The solution in the help file states it could be a timeout problem.
If so, what is the solution to the problem. (I cannot access the source of the DLL subroutine).your listener.ora file has problem!
it should look similiar to:
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = elvis)(PORT = 1521))
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC))
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = <substitute with your oracle home>)
(PROGRAM = extproc)
(SID_DESC =
(GLOBAL_DBNAME = elvis)
(ORACLE_HOME = <substitute_with_your_oralce_home>)
(SID_NAME = elvis)
please verify with net8 admin guide. you also need to set up tnsnames.ora correctly at client side.
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Benjamin Sigursteinsson ([email protected]):
I'm having a problem calling an external procedure running on Linux. The setup works using NT and a DLL, but when the function has been converted to a .so library, I get get
ORA-28575: unable to open RPC connection to external procedure agent
Now this is probaly due to my listener config since when starting the listener I get an IPC error:
Connecting to (ADDRESS=(PROTOCOL=IPC)(KEY=elvis))
TNS-12224: TNS:no listener
TNS-12541: TNS:no listener
TNS-12560: TNS:protocol adapter error
TNS-00511: No listener
Linux Error: 111: Connection refused
Connecting to (ADDRESS=(PROTOCOL=TCP)(Host=elvis)(Port=1521))
STATUS of the LISTENER<HR></BLOCKQUOTE>
null
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