Precompilers, OCI & OCCI :: NULL Values In C Structures?
May 18, 2010
I use a cursor to select records from a database table into a C structure as follows...
{
int iLoop = 0;
int iResult = 0;
[Code]....
The otc_multiplier field is NULL. As is the to_date sometimes. However, when I output the records later, the entries where the to_date is NULL come out fine (no value). But the otc_multiplier is getting output as 0.0 using...
// this is output later in another fuction using the following..
sprintf(newRecord, "%.1f",daServiceRecs->itemMultiplier);
If using c structures in this manner, what is the method for ensuring that numeric values are set to NULL when required?
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Jun 1, 2010
If doing an insert into DATE type fields like below... how do I employ null indicator values with the TO_DATE sql to cope with NULL values for the End Date? I can test the NULLness of the pServiceRecord->itemTo value and set the indicator ind_dbToDate to -1 but I don't know how to incorporate this with the to_date syntax (if I can)?
EXEC SQL BEGIN DECLARE SECTION;
char dbFromDate[MAX_DATE_LEN];
char dbToDate[MAX_DATE_LEN];
short ind_dbToDate;
[code]...
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Dec 13, 2010
We are migrating a proc application as described below.
Old Env: UNIX
Old DB: Oracle 8i
New Env: Linux
New DB: Oracle 11g
New modules are successfully compiled in Linux environment. But we are facing issues in writing the output of VARCHAR datatype to a file.
find below the extract of code.
EXEC SQL BEGIN DECLARE SECTION;
varchar mcolmnvarchar[4];
EXEC SQL END DECLARE SECTION;
EXEC SQL DECLARE crs CURSOR FOR
SELECT NVL(colmn,' ') FROM table1
memset(mcolmnvarchar.arr,'�',4); //Was added for only Linux migration. Not present in unix env.
EXEC SQL FETCH c1 INTO :mcolmnvarchar;
cout << "Data at Stage one"<< mcolmnvarchar << endl;
mcolmnvarchar.arr[mcolmnvarchar.len]='�';
cout << "Data at Stage two"<< mcolmnvarchar << endl;
fprintf(fptr,"%-4s",mcolmnvarchar.arr);
Above code works absolutely fine in Unix env with Oracle 8i. But with Linux env & Oracle 11g it is not working. No compilation or run time errors. Data at Stage one prints the output of database properly. But after null terminator code, Data at Stage two statement prints without any value. Value is lost after null terminator code.
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Aug 12, 2008
Is it possible to connect with Oracle using C?
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Sep 26, 2012
I am trying to give back data from a stored procedure written in C. I registered the functions as follows:create or replace procedure version(versioninfo OUT clob) as external name "version" library myLib language c with context parameters (context, versioninfo, versioninfo INDICATOR SB4); It compiles fine. The function being called look like this:
extern "C" DLLEXPORT
void version(OCIExtProcContext* context, OCILobLocator **out, sb4 *ind_out){
OCIEnv* envh;
OCISvcCtx* svch;
OCIError* errh;
OCIExtProcGetEnv (context, &envh, &svch, &errh);
std::string versioninfo = "104";
oraub8 maxChar = 10;
[code]...
If I execute the procedure with SQLDeveloper by pressing "play" it is getting executed but there is no result. If I try to execute it from an anonymous block it results in ORA-22275 instead of doing anything.
declare
res clob;
begin
-- the following doesn't work much
--dbms_lob.createtemporary(res,true);
version(res);
dbms_output.put_line(res);
end;
Actually I have to questions:
1.) Why does Oracle give me the error? In my opinion all requirements mentioned by the error description are met.
2.) Why is there no output when executing the function via SQL Developer? Is the usage of OCILobWrite wrong?
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Nov 26, 2009
I am trying to describe an STP in a package, but it gives me an error.
e.g. In package ABC suppose there is an STP XYZ, I am trying to describe ABC.XYZ function but it gives me an error code 4043 and error message object XYZ.ABC does not exist.
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Jan 24, 2009
My 10g pro*c application works perfectly, recently I upgraded it to 11g, but it keep crashing, why?
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Mar 31, 2010
i need to compile a proc program, say prog.pc.have oracle 10g in my system. Since i am new to proc programming, me on the steps to compile the proc program in oracle proc compiler.
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Aug 13, 2008
in my oci applications,if i get a column of number that is in the scope of int,i can use value = *(int *)field.data; get the value,but if the column size is larger than 10,the code can't be available,how can i get the value.
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Nov 26, 2012
I am trying to call procedure from PRO C Procedure has many parameters and I do not need to put all of them when I call procedure. Is there way to make the same way as in PL/SQL
like this
my_procedure( q=>a1 , b=>'abc )
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Aug 25, 2009
My program needs to connect to two databases and make operations in both databases:
Quote:connect to db1;
connect to db2;
select from table in db1;
update table in db2;
i would like to know whether it's possible, and how to do it ? how to specify for each query the database connection to use?
note that I can't use dblinks as i don't have enough access rights and privileges on neither of the databases.
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Jan 30, 2009
How to report an Oracle bug? Is there webpage or email?
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Sep 17, 2008
My OS is Linux and I installed Oracle 10.2. Everything is fine.I can use sqlplus, exp, imp etc with no problem.Now I have created another linux user test in /home/test. I unzipped basic-10.2xxxxxx.zip (/home/test/instantclient_10_2) and exported LD_LIBRARY_PATH.I guess I have installed instant client in this way.
My testOra.cpp:
#include <occi.h>
int main()
{
return 0;
}
This test.cpp would not compile. It cannot find occi.
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Oct 7, 2010
I declare a cursor for a table with 8000 records, when I fetch the cursor this message appear ORA-03113: end-of-file on communication channels when the fetch reach the 6500 element, What is the problem here?. All data are ok, not null fields.
other problem
How I can reuse a cursor, I declare a cursor for a table where code_part = 300, then I fetch all elements until end cursor, then I close the cursor, Then I declare the same cursor again for the same table where code_part = 359, but it is not successful, when I tried to fetch the cursor again the cobol program show me the last record for the first code, How I can restart the cursor or delete it or freed the cursor position?
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Apr 26, 2012
I am inserting empno in a table1 and updating another table2 using table1 empno and getting ora-01427 error. I want to print empno for whis this error is coming. How to print that value?
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Dec 11, 2010
Can i convert a .c file to .pc file?The .c file is generated by compiling .pc file. I mistakenly deleted the .pc file. I need the original .pc file.
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Apr 17, 2009
how to integrate SQLnet & c and I'm quite losted at the moment.
Searching with google gives some random stuff, which does seems to be irrelevant.some oracle db somewhere and need for good way to use that remote db (one solution seems to be using SQLnet).
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Jul 7, 2011
I found this thread, and recently i want to embedded oci in pro*c for distributed transaction reason.
can pro*c deal with distributed transaction? i want to use mts in pro*c .
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May 24, 2005
I am using dynamic Pl/SQL with ProC and having problems with cursor. I've to execute stored procedure dynamically and get the result of select list into the cursor. The EXECUTE command is working fine but the FETCH gets failed with error "ORA-01002: fetch out of sequence". I've read that cursor variable can not be used with dynamic SQL.
Stored Procedure:
------------------
ROCEDURE open_mod_cur (
curs IN OUT cur_type,
module_id IN varchar2)
[Code].....
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Apr 26, 2010
I have Multi-threaded application using pro*c to connect to oracle.
I am using the following piece of code to create a connection to oracle database and preserver the context of created connection.
struct sqlca * tempSqlca = new sqlca;
struct sqlca & sqlca = * tempSqlca;
EXEC SQL BEGIN DECLARE SECTION;
SQL_CONTEXT localContext;
[code].....
I am using the following piece of code to close the connection to the oracle database, I am using the context created in the previous step and passing it to the below code(connection.context)to release the connection.
if (connection.context == 0 || connection.ca == 0)
return true;
// Multithreading: get the communication area of the context
struct sqlca & sqlca = *(connection.ca);
EXEC SQL BEGIN DECLARE SECTION;
[code].....
When the above code is executed there is no exception thrown but the connection is not getting close. I am using the V$SESSION system views to monitor the connection created.
I there anything I am missing in my code for the connection closing to fail.
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Apr 13, 2009
I am receiving the following error while inserting records.
"Oracle Error:ORA-12899: value too large for column "MFG_ADMIN"."GAGE_RESULTS"."COMP
whereas I am checking the length of all values before inserting and am sure that none of them are larger than column lengths.I did some research and found this error might be due to character set.
select * from nls_database_parameters where parameter like '%CHARACTERSET';
PARAMETER VALUE
------------------------------
----------------------------------------------------------------------------------------------------
--------------------
NLS_CHARACTERSET UTF8
NLS_NCHAR_CHARACTERSET UTF8
how can this be related to my problem or if something else is causing this error.
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Aug 23, 2010
I am having a core dump while running exe that uses services in pro c to go to the DBthe sentence that causes the dump is:
sqlcxt((void **)0, &sqlctx, &sqlstm, &sqlfpn);
I need to print the &sqlctx, &sqlstm, &sqlfpn just before the call.
tried " printf("from select sqlstmt %s
", sqlstmt);
but it only prints the " from select sqlstmt "
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Mar 4, 2010
what is OCI_BATCH_ERRORS and BATCH ERROR Mode ?and how the user can set it ?
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Apr 16, 2009
I am back with one more issue. I am fetching records through a cursor from database using Pro*C and inserting some records as shown below:
EXEC SQL DECLARE cur_num CURSOR FOR
SELECT STUDENT_NUMBER
FROM STUDENTS
WHERE STDID = :temp_num
ORDER BY STUDENT_NUMBER;
EXEC SQL OPEN cur_num;
EXEC SQL WHENEVER NOT FOUND DO break;
[code]....
This code works fine sometimes but ends up with this error sometimes: ORA-01002: fetch out of sequence and also do I need to do null termination once i fetch data from the database like this:
Quote:EXEC SQL FETCH cur_num INTO :std_num ;
std_num.arr[std_num.len] = '�';
std_num is declared as varchar datatype.
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Nov 11, 2011
I am running a pro*c its working fine but my connection gets disconnect to my db server so i want to continue my proc if connection between my machine & server reestablish again weather it starts from start or from where it was stooped because of connection break
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Apr 18, 2009
I am current using Pro*C to upload data from a flat file to database.
Now I have to transfer information(data) between databases. As a rookie, I do not know an efficient of way doing it.
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Oct 11, 2010
situation
1- process connect oracle ( process means PRO*C)
2- then process is finished
3- process was called from inside batch
My question is
after process ( binary program ) is finished. Is it possible to connect some way to oracle without login.
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Nov 19, 2010
I wrote the below C code and I don't How can compile to so file
/* Include standard IO. */
#include <stdio.h>
#include <string.h>
#include <sqlca.h>
#include <stdlib.h>
[code].......
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Aug 17, 2012
I'm having a problem pr-compiling gtk functions in c files.
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Sep 5, 2008
We have a very simple OCI call to a db proc that uses a ref cursor to select from a table.
We intermittently get ORA-1403 NO DATA FOUND and ORA-01405 FETCH COLUMN VALUE IS NULL errors. However, the data does exist and the columns are set as not null. If we run the proc manually then it works fine.
We have only recently switched to using RAC (2 instances).
Example
procedure tile_features (in_mm_tile_key in mm_tile_geometries.mm_tile_key%type, out_features_cursor out sys_refcursor, out_status_code out number, out_status_text out varchar2)
is
begin
open out_features_cursor for
select m.mm_tile_key,
[code]....
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