Precompilers, OCI & OCCI :: Using Pointer To Structure For Selecting Multiple Rows From Table
May 11, 2010
I am working on Pro*C and i have a requirement where i need to select all the rows from a table into a c - structure variable. Since i get to know the no of rows in the table which is getting selected only at run time, i need to create a pointer variable to the structure and i'll allocate the size to it based on the count of rows in the table using malloc or calloc.I tried allocating memory using calloc and it does not show any error. But when i when the exec select statement run it shows an error.
Statements i have used:
struct common *comp;
struct common_ind *comp_i;
comp = (struct common*) calloc(rowcount, sizeof(struct common));
comp_i = (struct common_ind*) calloc(rowcount, sizeof(struct common_ind));
exec sql at db1 select * into :comp indicator :comp_i from tab1;
Error i get :
Stop Error: -2112
Stop Error: -1012
Stop Error: -1012
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Mar 12, 2009
sample code in OCI in C for receiving records of table in array of structure? Or dynamically storing the result-set in an array..using array of pointers to structure..
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Aug 18, 2010
I am trying to insert multiple rows using array bind feature.
The following is working fine & inserting rows as expected.
char values[3][2] = { "1", "2", "3" };
ub2 lenp[3];
lenp[0] = lenp[1] = lenp[2] = 2;
[Code]...
OCIStmtExecute() is failing with the following error
Error - ORA-01480: trailing null missing from STR bind value
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Apr 29, 2010
I created a table and some type definitions in oracle 10.2.0.3 DB as follows. There is also a procedure that I defined and is shown below.
SQL> create table test_proc
(
test_name varchar2(10),
test_ver number (3,3),
active_flag number(2)
);
Table created.
SQL> select * from test_proc;
TEST_NAME TEST_VER ACTIVE_FLAG
---------- ---------- -----------
AFP 1.5 2
PSA 11.89 0
EHIV 99.5 3
aHAVM 1.45 9
[code]....
Now from Pro*C function I want to pass a similar array of structure to this procedure and return it via the out parameter of the procedure back to Pro*C. How do I do it?
I am using the attached program but its giving me compiler error as follows..
Error at line 31, column 1 in file sample.pc
proc_modify_tdefs (:in_tdefs,:out_tdefs);
1
PLS-S-00306, wrong number or types of arguments in call to 'PROC_MODIFY_TDEFS'
Error at line 31, column 1 in file sample.pc
proc_modify_tdefs (:in_tdefs,:out_tdefs);
[code]....
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Jul 27, 2012
I have a flat file as source wherein I am getting values like
Comp_id, Comp_name, ISIN, column_name, column_value
The structure is like this may contain multiple records like Comp_id, Comp_name, ISIN will be same, but column_name will contain the column_name to which its corresponding column_value needs to be populated to.
E.g. of Feed File -
Comp_id, Comp_name, column_name, column_value
1,HSBC,branch_name,HSBC-DELHI
1,HSBC,branch_add,24-Lajpat Nagar
1,HSBC,branch_phone,2322322
2,HSBC,branch_name,HSBC-MUMBAI
2,HSBC,branch_add,24Andheri
2,HSBC,branch_phone,4445221
2,HSBC,branch_postalcode,400023
Target table structure
Comp_id, Comp_name, branch_name, branch_add, branch_phone, branch_postalcode
I need to insert the above data to a table by selecting data from above scenario.
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Dec 9, 2009
We are currently using OCI to connect to Oracle DB using c language. Each process has its own dedicated Connection and Env handle, session handle ...
Right now we decided to use Connection Pooling. In the documentation , Connection pooling examples were using multi-threaded environment. But in our case its multi-process system and we cant modify products architecture to multi-thread.
I would like to know how we can use Connection Pooling on multiple processes.
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Jul 29, 2008
How to fetch all the rows in a cursor in local variables(host variables) in PRO C . /*For x in cur is not working....*/
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Dec 16, 2008
I want to insert XML data into my ( Oracle 11G Release 1 ) XMLType table using OCCI. I'm getting
ORA-01461: can bind a LONG value only for insert into a LONG column
My XML data size is around 1.5 to 2MB. I have also tried using setMaxParamSize before calling the setString method. But, still I'm getting the same exception.
How to resolve this issue?
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Jan 24, 2011
I have to write a PL/SQL procedure, which is supposed to take an array of strings as input. This array will have simple strings as elements, like
'000887S','000780S'.
Now I have a query in the procedure, which will return a row, for each of the array elements. For example:
SELECT
su.EMPLOYEE_ID,su.FIRST_NAME,
su.LAST_NAME
FROM
USERS su,
[code]......
In the place of the '?' in the above query, the array elements have to be passed. So we will get one row from the above query for each array element.
Now we either have to loop through the array elements to fetch the result set for the above query for each array element, or we can use some other method too. Our objective is to collect all the rows of the above query for each array element as a table data and this procedure has to return this table set.
what will be the best way to pass such a set of data to the proc and best way for the proc to return this result set. Like we can use arrays, table type data,ref cursors, etc.
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Jul 18, 2013
This is my table design:
REQUEST(R_ID,attr1,attr2)WIPS(R_ID,WIP,attr3,attr4)SHIPPING(WIP,attr5,attr6)
How do I limit my query to show the information from REQUEST but only where the all of the wips associated between REQUEST and WIPS are not in the SHIPPING table. For example, the SHIPPING table has all of the WIPS that have been shipped, I only want to show the REQUEST rows where all of the WIPS have not shipped.
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Nov 26, 2010
I am attempting to select back multiple values for a specific key on one row. See the example below. I have been able to use the sys_connect_by_path to combine the fields into one field but I am unable to assign them to fields of their own. See the example below
TABLE DETAILS:
Policy id plan name
111 A Plan
111 B Plan
111 Z Plan
112 A Plan
112 Z Plan
My desired result is to be able to show the output as follows
Policy ID Plan_1 Plan_2 Plan_3
111 A Plan B Plan Z PLan
112 A Plan Z PLan
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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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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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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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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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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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