Table function giving crappy code.

Hi there,
I'm trying to implement a table function for in a simple mapping.
It has 1 input variable, the table function uses this variable to return 2 variables in a type object (type = table of rows).
The problem is that the code that the mapping generates is not working, because it is trying to create a cursor.
Without the cursor the code works fine.
Funny thing is I have done this before and that time it generated different code, without the cursor statement, and it worked.
What am I missing here??
See the code that's not working below.
Error message is: wrong number or types of arguments in call..
INSERT
/*+ APPEND PARALLEL(TEST, DEFAULT, DEFAULT) */
INTO
"TEST"
("MP_NAME",
"LP_DATE")
(SELECT
/*+ NO_MERGE */
"LAST_PROCESS_DATE".MP_NAME "MP_NAME",
"LAST_PROCESS_DATE".LP_DATE "LP_DATE"
FROM TABLE ( LAST_PROCESS_DATE (
CURSOR (SELECT
FULLPACKAGENAME."MP_NAME$1" "MP_NAME$0"
FROM DUAL ))) "LAST_PROCESS_DATE"
);

... you are right. You cannot write the code of a table function inside owb. You must write the table function external and create it in the database. In owb you only can call the table function.
Regards,
Detlef

Similar Messages

Manage table function's source code in OWB metadata

Hi all,
please I would like to know if it possible to code a table function in OWB's metadata.
I'll try to better explain myself; I know how to use a tf in a mapping but I also would like to manage the table function's source code in OWB metadata repository.
It appears you cant code a table function as procedures/functions: there's no ref_cursor as input , no pipelined option and so on.
I'm workin on 10.2.0.4 OWB repos.
Any information will be appreciated, thanks.
best regards, David

... you are right. You cannot write the code of a table function inside owb. You must write the table function external and create it in the database. In owb you only can call the table function.
Regards,
Detlef

How to use the Table Function defined in package in OWB?

Hi,
I defined a table function in a package. I am trying to use that in owb using Table function operator. But I came to know that, owb R1 supports only standalone table functions.
Is there any other way to use the table function defined in a package. As like we create synonyms for functions, is there any other way to do this.
I tryed to create synonyms, it is created. But it is showing compilation error. Finally I found that, we can't create synonyms for functions which are defined in packages.
Any one can explain it, how to resolve this problem.
Thank you,
Regards
Gowtham Sen.

Hi Marcos,
Thank you for reply.
OWB R1 supports stand alone table functions. Here what I mean is, the table fucntion which is not inculded in any package is a stand alone table function.
for example say sample_tbl_fn is a table function. It is defined as a function.It is a stand alone function. We call this fucntion as "samp_tbl_fn()";
For exampe say sample_pkg is a package. say a function is defined in a package.
then we call that function as sample_pkg.functionname(); This is not a stand alone function.
I hope you understand it.
owb supports stand alone functions.
Here I would like to know, is there any other way to use the functions which are defined in package. While I am trying to use those functions (which are defined in package -- giving the name as packagename.functionname) it is throwing an error "Invalid object name."
Here I would like know, is there any other way to use the table functions which are defined in a package.
Thank you,
Regards,
Gowtham Sen.

Table function on a collection in Dynamic SQL

Hello,
I am trying to create a refcursor by selecting from a collection using table function.
If I use the Select statement the query executes, but if I put the Select statement in a string
the collection variable does not get resolved. The resaon I am putiing it in a string is because the
WHERE clause will be passed a parameter. The code below is an anonymous block but will be changed to a
procedure once I get it to work.
I have tried many different ways but was unsuccessful.
Please see if anybody cann assist or what I am trying to achive is not possible, so provide an alternative.
The error I am getting is
ORA-00904: "V_ALARM_REC_TABLE": invalid identifier
ORA-06512: at line 50
Thanks.
Bimal
DECLARE
TYPE c_refcurtype IS REF CURSOR;
x c_refcurtype;
p_recordset c_refcurtype;
v_rec mc2_dev2.mc2_alarm_rec_type := mc2_dev2.mc2_alarm_rec_type(null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null,null,
null,null,null,null,null,null,null);
v_alarm_rec_table mc2_dev2.mc2_alarm_rec_table := mc2_dev2.mc2_alarm_rec_table();
v_select varchar2(200) := 'select a.* from ';
v_table varchar2(200) := 'table(v_alarm_rec_table) a ';
v_where varchar2(200) := 'where a.alarm_rule_def_uid = 9';
v_query varchar2(32000);
BEGIN
MC2_ALARM.create_mc2_alarm(x, 1); --- ( X is a refcursor, which I will use to populate v_alarm_rec_table a (nested table collection)
LOOP
FETCH x INTO v_rec.record_cnt,
v_rec.rn,
v_rec.alarm_precision_order,
v_rec.alarm_rule_def_uid,
v_rec.alarm_type_def_uid,
v_rec.alarm_rule_scope_uid,
v_rec.trigger_tpl_master_uid,
v_rec.alarm_scope_def_uid,
v_rec.alarm_object_uid,
v_rec.error_type,
v_rec.all_error_codes,
v_rec.enabled,
v_rec.start_hour,
v_rec.end_hour,
v_rec.day_type,
v_rec.alarm_severity_def_uid,
v_rec.on_watch_duration,
v_rec.update_on_status_change,
v_rec.log_ind,
v_rec.email_to,
v_rec.email_from,
v_rec.send_email,
v_rec.stale_period;
EXIT WHEN x%NOTFOUND;
v_alarm_rec_table.extend;
v_alarm_rec_table(v_alarm_rec_table.last) := v_rec;
END LOOP;
CLOSE x;
v_query := v_select||v_table||v_where; -- ERROR OCCURS AT THIS LINE as it cannot resolve the TABLE name v_alarm_rec_table)
dbms_output.put_line('sql: '||v_query);
OPEN p_recordset FOR v_query;
LOOP
FETCH p_recordset INTO v_rec.record_cnt,
v_rec.rn,
v_rec.alarm_precision_order,
v_rec.alarm_rule_def_uid,
v_rec.alarm_type_def_uid,
v_rec.alarm_rule_scope_uid,
v_rec.trigger_tpl_master_uid,
v_rec.alarm_scope_def_uid,
v_rec.alarm_object_uid,
v_rec.error_type,
v_rec.all_error_codes,
v_rec.enabled,
v_rec.start_hour,
v_rec.end_hour,
v_rec.day_type,
v_rec.alarm_severity_def_uid,
v_rec.on_watch_duration,
v_rec.update_on_status_change,
v_rec.log_ind,
v_rec.email_to,
v_rec.email_from,
v_rec.send_email,
v_rec.stale_period;
EXIT WHEN p_recordset%NOTFOUND;
some dbms_output statements...
END LOOP;
END;
The error I am getting is
ORA-00904: "V_ALARM_REC_TABLE": invalid identifier
ORA-06512: at line 50

Thanks Timur/Solomon,
mc2_dev2 is the schema name.
mc2_alarm_rec_table is a SQL type.
Here are the scripts:
CREATE OR REPLACE TYPE MC2_DEV2.mc2_alarm_rec_type IS OBJECT
( record_cnt NUMBER,
rn number,
alarm_precision_order NUMBER(6),
alarm_rule_def_uid NUMBER(6),
alarm_type_def_uid NUMBER(6),
alarm_rule_scope_uid NUMBER(6),
trigger_tpl_master_uid NUMBER(6),
alarm_scope_def_uid NUMBER(6),
alarm_object_uid NUMBER(6),
error_type VARCHAR2(1),
all_error_codes VARCHAR2(1),
enabled VARCHAR2(1),
start_hour NUMBER(2),
end_hour NUMBER(2),
day_type NUMBER(2),
alarm_severity_def_uid NUMBER(6),
on_watch_duration NUMBER(6),
update_on_status_change VARCHAR2(1),
log_ind VARCHAR2(1),
email_to VARCHAR2(128),
email_from VARCHAR2(128),
send_email VARCHAR2(1),
stale_period NUMBER(6)
CREATE OR REPLACE TYPE MC2_DEV2.MC2_ALARM_REC_TABLE IS TABLE OF MC2_DEV2.mc2_alarm_rec_type;
If I popoulate the cursor with the following code:
OPEN p_recordset FOR
select a.* from table (v_alarm_rec_table) a where a.alarm_rule_def_uid = 9;
there is no issue it works just fine.
But when when I use
OPEN p_recordset FOR v_query; ---- where v_query := v_select||v_table||v_where;
the variable v_alarm_rec_table does not get resolved.
Regards,
Bimal

How can one read a Excel File and Upload into Table using Pl/SQL Code.

How can one read a Excel File and Upload into Table using Pl/SQL Code.
1. Excel File is on My PC.
2. And I want to write a Stored Procedure or Package to do that.
3. DataBase is on Other Server. Client-Server Environment.
4. I am Using Toad or PlSql developer tool.

If you would like to create a package/procedure in order to solve this problem consider using the UTL_FILE in built package, here are a few steps to get you going:
1. Get your DBA to create directory object in oracle using the following command:
create directory TEST_DIR as ‘directory_path’;
Note: This directory is on the server.
2. Grant read,write on directory directory_object_name to username;
You can find out the directory_object_name value from dba_directories view if you are using the system user account.
3. Logon as the user as mentioned above.
Sample code read plain text file code, you can modify this code to suit your need (i.e. read a csv file)
function getData(p_filename in varchar2,
p_filepath in varchar2
) RETURN VARCHAR2 is
input_file utl_file.file_type;
--declare a buffer to read text data
input_buffer varchar2(4000);
begin
--using the UTL_FILE in built package
input_file := utl_file.fopen(p_filepath, p_filename, 'R');
utl_file.get_line(input_file, input_buffer);
--debug
--dbms_output.put_line(input_buffer);
utl_file.fclose(input_file);
--return data
return input_buffer;
end;
Hope this helps.

How to get source table inside Template Mapping code template

Hi guys,
I have the following scenario, I have an table from external database and want to map it to an oracle table. This is done with Template mapping and I selected an Load code template on the execution unit that holds only the external table, this load code template will read row by row from source table and make the inserts into the flow table. I know that oracle use odiRef.getFrom() in order to construct the select statement from the external table. Because i need to do something custom i will need to have a list of the source tables inside the Load code template.
Is this possible?
P.S. I use owb 11gr2.
Regards,
Cipi
Edited by: Iancu Ciprian on Jan 11, 2011 10:58 AM

Hi Suraj,
Thx for your answer!
After posting the message i found in ODI documentation about odiRef other function and this I'm trying now to see if works, will let you know my results ...
I implemented an custom iterator that retrieves the data from an external source and pass it to INSERT commands to execute against flow table. In order that this iterator to work i need the source table name of the current execution unit. Then the iterator is using the that name to get the data from the external entity and retrieve it as an array of Objects, this array of objects will be inserted in the flow table.
Regards,
Cipi

Drop default constraint on a table function

I need to drop some default constraints that appear to be tied to table functions (and not actual tables). This means when I try the ALTER TABLE DROP CONSTRAINT command it fails with the error, "unable to drop constraint because object is not
a table" or something similar.
My question is: how do I drop a constraint on a table function?

I suggest you review the documentation for TVFs and how they are (and can be) used. The table returned by a TVF (and in this case I refer specifically to multistatement TVFs) are defined using a subset of the create table syntax. They can be
created with constraints of different types - not just defaults. Why? Because it suits the logic of the developer and (perhaps) because it assists the database engine or the logic that depends on the output of the function.
Below is one example that I used (written by Steve Kass) from a LONG time ago. Notice the primary key.
CREATE FUNCTION [dbo].[uf_sequence] (@N int)
RETURNS @T TABLE (
seq int not null primary key clustered
AS
** 04/21/05.sbm - Bug #306. Initial version.
** Code provided by Steve Kass - MS .programming newsgroup
BEGIN
DECLARE @place int
SET @place = 1
INSERT INTO @T (seq) VALUES (0)
WHILE @place <= @N/2 BEGIN
INSERT INTO @T (seq)
SELECT @place + Seq FROM @T
SET @place = @place + @place
END
INSERT INTO @T (seq)
SELECT @place + Seq FROM @T
WHERE Seq <= @N - @place
RETURN
END
go
For your particular case, the choice of a default constraint is likely due to the implementation of the logic in the function. Perhaps there are multiple insert statements and it was simpler/easier/more robust to use a default constraint rather than
repeatedly hard-code the value in each statement. By choosing a default constraint, the developer need only alter the constraint (once) if the value needs to be changed rather than finding and changing each statement that inserts or updates the table.
As you've have already discerned, you can simply ignore any constraints that are defined on the tables returned by a TVF.

How to find out the Area Menu for a Report/ Table/Function Module

Hi,
Is there any procedure to find out the <b>"AREA MEANU"</b> for a Report/Table/Function Module...
Or is there any Transaction code / Report is available to find out all the report for a particular "AREA MENU".
Thank you for your quick response...
Regards,
Thiru
<b></b>

Hi,
Check these below threads:
user log in & log out time SAO
How to find user log-out time ?
Regards,
Nitin

Need some help with the Table Function Operator

I'm on OWB 10gR2 for Sun/Solaris 10 going against some 10gR2 DB's...
I've been searching up and down trying to figure out how to make OWB use a Table Function (TF) which will JOIN with another table; allowing a column of the joined table to be a parameter in to the TF. I can't seem to get it to work. I'm able to get this to work in regular SQL, though. Here's the setup:
-- Source Table:
DROP TABLE "ZZZ_ROOM_MASTER_EX";
CREATE TABLE "ZZZ_ROOM_MASTER_EX"
( "ID" NUMBER(8,0),
"ROOM_NUMBER" VARCHAR2(200),
"FEATURES" VARCHAR2(4000)
-- Example Data:
Insert into ZZZ_ROOM_MASTER_EX (ID,ROOM_NUMBER,FEATURES) values (1,'Room 1',null);
Insert into ZZZ_ROOM_MASTER_EX (ID,ROOM_NUMBER,FEATURES) values (2,'Room 2',null);
Insert into ZZZ_ROOM_MASTER_EX (ID,ROOM_NUMBER,FEATURES) values (3,'Room 3','1,1;2,3;');
Insert into ZZZ_ROOM_MASTER_EX (ID,ROOM_NUMBER,FEATURES) values (4,'Room 4','5,2;5,4;');
Insert into ZZZ_ROOM_MASTER_EX (ID,ROOM_NUMBER,FEATURES) values (5,'Room 5',' ');
-- Destination Table:
DROP TABLE "ZZZ_ROOM_FEATURES_EX";
CREATE TABLE "ZZZ_ROOM_FEATURES_EX"
( "ROOM_NUMBER" VARCHAR2(200),
"FEATUREID" NUMBER(8,0),
"QUANTITY" NUMBER(8,0)
-- Types for output table:
CREATE OR REPLACE TYPE FK_Row_EX AS OBJECT
ID NUMBER(8,0),
QUANTITY NUMBER(8,0)
CREATE OR REPLACE TYPE FK_Table_EX AS TABLE OF FK_Row_EX;
-- Package Dec:
CREATE OR REPLACE
PACKAGE ZZZ_SANDBOX_EX IS
FUNCTION UNFK(inputString VARCHAR2) RETURN FK_Table_EX;
END ZZZ_SANDBOX_EX;
-- Package Body:
CREATE OR REPLACE
PACKAGE BODY ZZZ_SANDBOX_EX IS
FUNCTION UNFK(inputString VARCHAR2) RETURN FK_Table_EX
AS
RETURN_VALUE FK_Table_EX := FK_Table_EX();
i NUMBER(8,0) := 0;
BEGIN
-- TODO: Put some real code in here that will actually read the
-- input string, parse it out, and put data in to RETURN_VALUE
WHILE(i < 3) LOOP
RETURN_VALUE.EXTEND;
RETURN_VALUE(RETURN_VALUE.LAST) := FK_Row_EX(4, 5);
i := i + 1;
END LOOP;
RETURN RETURN_VALUE;
END UNFK;
END ZZZ_SANDBOX_EX;
I've got a source system built by lazy DBA's and app developers who decided to store foreign keys for many-to-many relationships as delimited structures in driving tables. I need to build a generic table function to parse this data and return it as an actual table. In my example code, I don't actually have the parsing part written yet (I need to see how many different formats the source system uses first) so I just threw in some stub code to generate a few rows of 4's and 5's to return.
I can get the data from my source table to my destination table using the following SQL statement:
-- from source table joined with table function
INSERT INTO ZZZ_ROOM_FEATURES_EX(
ROOM_NUMBER,
FEATUREID,
QUANTITY)
SELECT
ZZZ_ROOM_MASTER_EX.ROOM_NUMBER,
UNFK.ID,
UNFK.QUANTITY
FROM
ZZZ_ROOM_MASTER_EX,
TABLE(ZZZ_SANDBOX_EX.UNFK(ZZZ_ROOM_MASTER_EX.FEATURES)) UNFK
Now, the big question is--how do I do this from OWB? I've tried several different variations of my function and settings in OWB to see if I can build a single SELECT statement which joins a regular table with a table function--but none of them seem to work, I end up getting SQL generated that won't compile because it doesn't see the source table right:
INSERT
/*+ APPEND PARALLEL("ZZZ_ROOM_FEATURES_EX") */
INTO
"ZZZ_ROOM_FEATURES_EX"
("ROOM_NUMBER",
"FEATUREID",
"QUANTITY")
(SELECT
"ZZZ_ROOM_MASTER_EX"."ROOM_NUMBER" "ROOM_NUMBER",
"INGRP2"."ID" "ID_1",
"INGRP2"."QUANTITY" "QUANTITY"
FROM
(SELECT
"UNFK"."ID" "ID",
"UNFK"."QUANTITY" "QUANTITY"
FROM
TABLE ( "ZZZ_SANDBOX_EX"."UNFK2" ("ZZZ_ROOM_MASTER_EX"."FEATURES")) "UNFK") "INGRP2",
"ZZZ_ROOM_MASTER_EX" "ZZZ_ROOM_MASTER_EX"
As you can see, it's trying to create a sub-query in the FROM clause--causing it to just ask for "ZZZ_ROOM_MASTER_EX"."FEATURES" as an input--which isn't available because it's outside of the sub-query!
Is this some kind of bug with the code generator or am I doing something seriously wrong here? Any help will be greatly appreciated!

Hello Everybody!
Thank you for all your response!
I had changes this work area into Internal table and changed the select query. PLease let me know if this causes any performance issues?
I had created a Z table with the following fields :
ZADS :
MANDT
VKORG
ABGRU.
I had written a select query as below :
I had removed the select single and insted of using the Structure it_rej, I had changed it into Internal table
select vkorg abgru from ZADS into it_rej.
Earlier :
IT_REJ is a Work area:
DATA : BEGIN OF IT_REJ,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
Now :
DATA : BEGIN OF IT_REJ occurs 0,
VKORG TYPE VBAK-VKORG,
ABGRU TYPE VBAP-ABGRU,
END OF IT_REJ.
I guess this will fix the issue correct?
PLease suggest!
Regards,
Developer.

Can I pass a table function parameter like this?

This works. Notice I am passing the required table function parameter using the declared variable.
DECLARE @Date DATE = '2014-02-21'
SELECT
h.*, i.SomeColumn
FROM SomeTable h
LEFT OUTER JOIN SomeTableFunction(@Date) I ON i.ID = h.ID
WHERE h.SomeDate = @Date
But I guess you can't do this?... because I'm getting an error saying h.SomeDate cannot be bound. Notice in this one, I am attempting to pass in the table function parameter from the SomeTable it is joined to by ID.
DECLARE @Date DATE = '2014-02-21'
SELECT
h.*, i.SomeColumn
FROM SomeTable h
LEFT OUTER JOIN SomeTableFunction(h.SomeDate) I ON i.ID = h.ID
WHERE h.SomeDate = @Date

Hi
NO you cant pass a table function parameter like this?
As When you declare @date assign value to it and pass as a parameter it will return table which you can use for join as you did it in first code
But when you pass date from some other table for generating table from your funtion it doesnt have date as it is not available there
Ref :
http://www.codeproject.com/Articles/167399/Using-Table-Valued-Functions-in-SQL-Server
http://technet.microsoft.com/en-us/library/aa214485(v=sql.80).aspx
http://msdn.microsoft.com/en-us/library/ms186755.aspx
https://www.simple-talk.com/sql/t-sql-programming/sql-server-functions-the-basics/
http://www.sqlteam.com/article/intro-to-user-defined-functions-updated
Mark
as answer if you find it useful
Shridhar J Joshi Thanks a lot

Oracle 11g Table function returns no records on first call

Hello,
On a Oracle 11g R2 I've a table function ( PIPELINED ) returning rows selected from a table.
The first time the function is selected, in a session ( I've tried to disconnect and log in again ), it returns no rows.
I've tried to log the call using DBMS_OUTPUT and from what I see the select on the table function returns no rows and no output is printed. So I presume Oracle is not calling the function.
The same function on a similar environment ( same db versions, patches and database structure ) works fine. The second environment is a production environment so it has more memory and some other settings enabled.
Does anyone know of settings that can relate to this behaviour ?
Thanks in advance for the help.
Regards,
Stefano Muret

Thank you for answering so fast.
Here's the function code:
FUNCTION template_parameters (iTemplate IN TEMPLATE_RAW_DATA.TMPL_ID%TYPE := NULL)
RETURN table_type_tmpl_parameters PIPELINED
IS
li_exception INTEGER DEFAULT -20025;
POUT_PARM TABLE_TYPE_TMPL_PARAMETERS;
lt_parms table_type_tmpl_parms_raw;
sParmCheck VARCHAR2(4000);
iOccurrence INTEGER;
BEGIN
pOut_Parm := table_type_tmpl_parameters();
pOut_Parm.EXTEND;
select
tmpl_id
*,tmpl_name*
*,replace(upper(trim(sql_out)),'[SCHEMA].')*
*,UPPER(TRIM(out_tmpl_parms))*
bulk collect into lt_parms
from ref_templates
where tmpl_id = NVL(iTemplate,tmpl_id)
order by tmpl_id;
FOR k IN 1..lt_parms.COUNT
LOOP
pOut_Parm(1).tmpl_id := lt_parms(k).tmpl_id;
pOut_Parm(1).tmpl_name := lt_parms(k).tmpl_name;
FOR i IN 1..2
LOOP
IF i = 1 THEN
sParmCheck := lt_parms(k).sql_out;
ELSE
sParmCheck := lt_parms(k).sql_parms;
END IF;
iOccurrence := 1;
*pOut_Parm(1).parameter_name := regexp_substr(sParmCheck,'\[[^\[]+\]',1,iOccurrence);*
WHILE pOut_Parm(1).parameter_name IS NOT NULL
LOOP
PIPE ROW (pOut_Parm(1));
iOccurrence := iOccurrence + 1;
*pOut_Parm(1).parameter_name := regexp_substr(sParmCheck,'\[[^\[]+\]',1,iOccurrence);*
END LOOP;
END LOOP;
END LOOP;
RETURN;
EXCEPTION
WHEN OTHERS THEN
RAISE_APPLICATION_ERROR(li_exception,SUBSTR(SQLERRM,1,1000));
RETURN;
END template_parameters;
This function is part of a package.
The data on both environments is the same.

Pipeline Table Function returning a fraction of data

My current project involves migrating an Oracle database to a new structure based on the new client application requirements. I would like to use pipelined table functions as it seems as though that would provide the best performance.
The first table has about 65 fields, about 75% of which require some type of recoding for the new app. I have written a function for each transformation and have all of these functions stored in a package. If I do:
create new_table as select (
pkg_name.function1(old_field1),
pkg_name.function2(old_field2),
pkg_name.function3(old_field3),
it runs with out any errors but takes about 3 1/2 hours. There are a little more than 10 million rows in the table.
I wrote a function that is passed the old table as a cursor, runs all the functions for the transformations and then pipes the new row back to the insert statement that called the function. It is incredibly fast but only returns .025% of the data (about 50 rows out of my sample table of 200,000). It does not throw any errors.
So I am trying to determine what is going on. Perhaps one of my functions has a bug. If there was would cause the row to be kicked out? There are 40 or so functions so tracking this down has been a bit of a bear.
Any advice as to how I might resolve this would be much appreciated.
Thanks
Dan

. I would like to use pipelined table functions as it seems as though that would provide the best performanceUh huh...
it runs with out any errors but takes about 3 1/2 hours. There are a little more than 10 million rows in the table.Not the first time a lovely theory has been killed by an ugly fact. Did you do any bench marks to see whether the pipelined functions did offer performance benefits over doing it some other way?
From the context of your comments I think you are trying to a populate a new table from a single old table. Is this the case? If so I would have thought a straightforward CTAS with normal functions would be more appropriate: pipelined functions are really meant for situations in which one input produced more than one output. Anyway, ifr we are to help you I think you need to give us more details about how this process works and post a sample transformation function.
There are 40 or so functions so tracking this down has been a bit of a bear.The teaching is: we should code one function and get that working before moving on to the next one. Which might not seem like a helpful thing to say, but the best lesson is often "I'll do it differently next time".
Cheers, APC

Using table function in JDBC

Hi All,
im Oracle 9i R2 :
there are package with table function and JDBC client .
In client code :
Statement st = con.createStatement() ;
ResultSet rs = st.executeQuery("select * from table(pkg.func)") ;
while (rs.next())
System.out.println(rs.getString(1)) ;
- and that not work ...
What is wrong ? :)
With best regards, Slava

Can you define "not work" here... Do you get an error? If so, what is the error number you are getting (ORA-xxxxx)?
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

SQL functions in TOOL code

In my original email I should have made the point clear that an indexed
column was required, that led to some confusion, apologies.
Under Oracle 7 even if the column is indexed the query engine still does a
full scan of the index to find the maximum or minimum value. As strange as
this seems it is possible to view it using the Oracle trace functions such
as tkprof. This method is quicker than not having an index but the cursor
method is far more efficient.
When using a cursor based approach Oracle will go straight to the first
record of the index (depending on MAX or MIN) and retrieve the data. By
exiting at that point the function has been performed and the I/O operations
are extremely low compared to a full index scan.
Of course there is a trade off depending on the amount of rows but for large
indexed tables the cursor approach will be far faster than the normal
functions. I'm not sure how other RDBMS's handle MAX/MIN but this has been
my experience with Oracle. This process may be faster still by using PL/SQL
but then you are incorporating specific database languages which is
obviously a problem if you port to a different RDBMS. Here is some code you
can try for Oracle PL/SQL functions:
declare
cursor myCur1 is
select number_field
from number_table
order by number_field desc;
begin
open myCur1;
fetch myCur1 into :max_val;
close myCur1;
end;
I hope this clarifies things a bit more. If in doubt of the execution plan
of a performance critical query use the database trace functions as they
show up all sorts of surprises. MAX and MIN are easy to understand when
viewing code but perform poorly under Oracle, whether v8 behaves differently
I have yet to discover.
Cheers,
Dylan.
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Thursday, 7 January 1999 3:37
To: [email protected]
Subject: RE: SQL functions in TOOL code
I guess my point is that MAX can always be implemented more
efficiently than the SORT/ORDER-BY approach (but may not be the
case, depending on the RDBMS). If an ORDER-BY
can use an index (which means that the indexing mechanism involves
a sorted collection rather than an unordered hashtable) so can
MAX - in which case finding a MAX value could be implemented
in either O(1) or O(logn) time, depending on the implementation.
The last sentence being the major point of this whole discussion,
which is that your mileage may vary depending on the RDBMS - so
try using both approaches if performance is a problem.
In terms of maintenance, MAX is the much more intuitive approach
(In My Opinion, of course), since a programmer can tell right away
what the code is attempting to do.
Chad Stansbury
BORN Information Services, Inc.
-----Original Message-----
From: [email protected]
To: [email protected]; [email protected]; [email protected]
Sent: 1/6/99 10:45 AM
Subject: RE: SQL functions in TOOL code
Well, yes, but in that specific case (looking for max() value) would not
be
true that, if you have an index (and only then) on that specific column
some
databases (like Oracle) will be smart enough to use index and find max
value
without full table scan and without using order by clause?
Dariusz Rakowicz
Consultant
BORN Information Services (http://www.born.com)
8101 E. Prentice Ave, Suite 310
Englewood, CO 80111
303-846-8273
[email protected]
-----Original Message-----
From: Sycamore [SMTP:[email protected]]
Sent: Wednesday, January 06, 1999 10:29 AM
To: [email protected]; [email protected]
Subject: Re: SQL functions in TOOL code
If (and only if) an index exists on the exact columns in the ORDER BY
clause, some databases are smart enough to traverse the index (inforward
or
reverse order) instead of doing a table scan followed by a sort.
If there is no appropriate index, you always end up with some kind ofsort
step.
Of course this is all highly schema- and database-dependent, so youmust
weigh those factors when deciding to exploit this behavior.
Kevin Klein
Sycamore Group, LLC
Milwaukee
-----Original Message-----
From: [email protected] <[email protected]>
To: [email protected] <[email protected]>
Date: Wednesday, January 06, 1999 9:40 AM
Subject: RE: SQL functions in TOOL code
This seems a bit counter-intuitive to me... primarily due to
the fact that both MAX and ORDER-BY functionality would require
a full table scan on the given column... no? However, I would
think that a MAX can be implemented more efficiently since it
just requires the max value in a given set (which can be performed
in O(n) time on an unordered set) versus an ORDER-BY (sort)
performance on an unordered set of at best O(nlogn) time.
Am I missing something? Please set me straight on this 'un.
Chad Stansbury
BORN Information Services, Inc.
-----Original Message-----
From: Jones, Dylan
To: 'Vuong, Van'
Cc: [email protected]
Sent: 1/5/99 4:42 PM
Subject: RE: SQL functions in TOOL code
Hi Van,
Operating a function such as MAX or MIN is possible as given in your
example
but it is worth pointing out the performance overhead with such a
method.
When you use MAX, Oracle will do a full table scan of the column so
if
you
have a great many rows it is very inefficient.
In this case use a cursor based approach and depending on your
requirments
(MAX/MIN) use a descending or ascending ORDER BY clause.
eg.
begin transaction
for ( aDate : SomeDateDomain ) in
sql select DATE_FIELD
from DATE_TABLE
order by
DATE_FIELD DESC
on session MySessionSO
do
found = TRUE;
aLatestDate.SetValue(aDate);
// Only bother about the first record
exit;
end for;
end transaction;
On very large tables the performance increases with the above method
will be
considerable so it is worth considering which method to use whensizing
your
database and writing your code.
Cheers,
Dylan.
-----Original Message-----
From: Vuong, Van [mailto:[email protected]]
Sent: Tuesday, 5 January 1999 6:50
To: [email protected]
Subject: SQL functions in TOOL code
Is it possible to execute a SQL function from TOOL code?
For example:
SQL SELECT Max(Version) INTO :MyVersion
FROM Template_Design
WHERE Template_Name = :TemplateName
ON SESSION MySession;
The function in this example is MAX().
I am connected to an Oracle database.
Thanks,
Van Vuong
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Field or table alias is not allowed as an input of table functions

Hi,
I am trying to invoke a user defined table function through a SQL snippet like below.
SELECT (SELECT * FROM PKG_ORG_ORG_HAS_CHILDREN(org_id)) has_child
from PA_ORG_OWNER
where stud_id = 'np1';
But for some reason it will not accept column name as an IN parameter
Could not execute 'SELECT (SELECT * FROM PKG_ORG_ORG_HAS_CHILDREN(org_id)) has_child from PA_ORG_OWNER os where ...' in 2 ms 451 µs .
SAP DBTech JDBC: [7] (at 47): feature not supported: field or table alias is not allowed as an input of table functions: line 1 col 48 (at pos 47)
In general our product has a LOT of small Oracle PL/SQL functions that are invoked from SQL within application code. This is a huge bottleneck while migrating to HANA. Any best practice anyone can recommend for this issue?
-Thanks
nphana

Hi nphana,
Instead of using single function, you can create another function and Invoke the function and can use IN parameter.
Here is the example:
CREATE FUNCTION RAJ.MY_FUNC (I_VKORG NVARCHAR (4), I_VTWEG NVARCHAR (2),
             I_SPART NVARCHAR (2), I_PARVW NVARCHAR (2), I_PARZA NVARCHAR (3) )
RETURNS TABLE (KUNNR NVARCHAR (10))
LANGUAGE SQLSCRIPT AS
BEGIN
RETURN
SELECT "ECC2HANA"."KNVP".KUNNR FROM "ECC2HANA"."KNVP"
   WHERE "ECC2HANA"."KNVP".VKORG = :I_VKORG
     AND "ECC2HANA"."KNVP".VTWEG = :I_VTWEG
     AND "ECC2HANA"."KNVP".SPART = :I_SPART
     AND "ECC2HANA"."KNVP".PARVW = :I_PARVW
     AND "ECC2HANA"."KNVP".PARZA = :I_PARZA
END
SELECT * FROM RAJ.MY_FUNC('7500','10','00','AG','000');
Result is shown below:
Now I created another function so that I can use the result set of above function which is used as criteria for some other table.
I not used any input parameter for second function but can be used if required.
CREATE FUNCTION RAJ.FUNC_MY_FUNC ( )
RETURNS TABLE (NAME1 NVARCHAR (35))
LANGUAGE SQLSCRIPT AS
BEGIN
RETURN
SELECT "ECC2HANA"."KNA1".NAME1 FROM "ECC2HANA"."KNA1"
WHERE "ECC2HANA"."KNA1".KUNNR IN (SELECT * FROM RAJ.MY_FUNC('7500','10','00','AG','000'));
END;
Result is shown below:
Similarly you can do for your requirement.
Regards
Raj

Table function giving crappy code.

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