PL\SQL challange !!!

hello all,
I have a table which has undergone several changes (addition of columns) in different versions.
Now, I want to write a stored procedure (having select, insert, and update like queries ) which would run successfully on all the versions of the table.......
performance is one of the major issues which I had to handle as this stored procedure is going to b invoked by many user concurrently.....
example of the above scenario:
I have a table employee(say) and have columns (say) c1 c2 c3 and some stored procedure sp1 in first version of the database.
now, in second release of the database I change the structure of the table "Employee" and added a new column c4(say), and changed my stored procedure sp1 accordingly......
the problem is that I want to write a common stored procedure which should run on both the versions of table without much degradation in the time, the queries would take to complete.....
please suggest me some to solve this problem effectively.
thanks and regards
abhijeet.

Hi Abhijeet,
One idea can be:
Create a product version table (if not already existing), and a sql_code_version table that can be shaped like:
VERSION_CODE_TABLE
..VER_NUM NUMBER
..TARGET_TABLE VARCHAR
..OPER_ID VARCHAR
..QUERY_TEXT
And insert in this table for example
V1,EMP,INSERT,INSERT INTO EMP VALUES :1,:2,:3
V2,EMP,INSERT,INSERT INTO EMP VALUES :1,:2,:3,:4
And in your proc code, for example for the insert statement:
1/ SELECT verision_number from your version_table
2/ SELECT QUERY_TEXT from your VERSION_CODE_TABLE with proper OPER_ID and TARGET_TABLE
3/ Bind the vars for use with execute immediate (or dbms_sql, even)
Some work is to be done about the number of parameters..... it might be unknown (what if you add a 5th field to emp? do you give the parameters to the procedure using one parameter or multiple parameters... ?
That might be a way valuable to look into.
HTH
Yoann.

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The increment of val is one
My example is:
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d_no _________ val
1 ____________ 20
1 ____________ 21
1 ____________ 22
1 ____________ 23
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Hmm.. browser error or something. My earlier response to this posting has not shown up some hours later now..
Anyway, here is it again. I like the challange of such interesting problems and had a bash at it. The result is usable - i.e. it shows sequences and gaps. But not in your required format. Using lead and lag with the select that deals with the gaps, you could likely change it to the format you wanted.
SQL> create table ranges
2 (
3          inc     number,
4          value   number
5 )
6 /
Table created.
SQL>
SQL> insert into ranges values(1, 20);
1 row created.
SQL> insert into ranges values(1, 21);
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SQL> insert into ranges values(1, 22);
1 row created.
SQL> insert into ranges values(1, 23);
1 row created.
SQL> insert into ranges values(1, 25);
1 row created.
SQL> insert into ranges values(1, 1503);
1 row created.
SQL> insert into ranges values(1, 1504);
1 row created.
SQL> insert into ranges values(3, 502);
1 row created.
SQL> insert into ranges values(3, 503);
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SQL> insert into ranges values(3, 504);
1 row created.
SQL> insert into ranges values(3, 600);
1 row created.
SQL> commit;
Commit complete.
SQL>
SQL> with RANGE_RESULTS as (
2          select
3                  t1.inc,
4                  t1.value        as VALUE1,
5                  t2.value        as VALUE2
6          from    ranges t1,
7                  ranges t2
8          where   t1.inc = t2.inc (+)
9          and     (t1.value+1) = t2.value (+)
10 )
11 select
12          r.*
13 from       RANGE_RESULTS r
14 where      r.value2 is NULL
15 union
16 select
17          t1.inc,
18          MIN(t1.value1)          as VALUE1,
19          MAX(t2.value2)          as VALUE2
20 from       RANGE_RESULTS t1,
21          RANGE_RESULTS t2
22 where      t1.inc = t2.inc
23 and        t1.value2 is not NULL
24 and        t2.value2 is not null
25 and        t1.value2 = t2.value1
26 group by t1.inc
27 /
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         3        504
         3        600
7 rows selected.
SQL>

Logical Operations in SQL decode function ?

Hi,
Is it possible to do Logical Operations in SQL decode function
like
'>'
'<'
'>='
'<='
'<>'
not in
in
not null
is null
eg...
select col1 ,order_by,decode ( col1 , > 10 , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 , <> 10 , 0 , 1)
from tab;
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Regards,
infan
Edited by: user780731 on Apr 30, 2009 12:07 AM
Edited by: user780731 on Apr 30, 2009 12:07 AM
Edited by: user780731 on Apr 30, 2009 12:08 AM
Edited by: user780731 on Apr 30, 2009 12:08 AM
Edited by: user780731 on Apr 30, 2009 12:09 AM

example:
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from tab;
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from tab;

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hi.
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TYPE "SEARCH_SIGN_TAB_TYPE" IS TABLE OF SEARCH_SIGN_TYPE
TYPE "SEARCH_SIGN_TYPE" AS OBJECT
(ref_no VARCHAR2(22),
ciref_no VARCHAR2(352),
ac_no VARCHAR2(22),
txn_type VARCHAR2(301),
objid VARCHAR2(1024))............

We don't have your rt843pq procedure, but when commenting that line out, everything works:
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2 (ref_no VARCHAR2(22),
3 ciref_no VARCHAR2(352),
4 ac_no VARCHAR2(22),
5 txn_type VARCHAR2(301),
6 objid VARCHAR2(1024))
7 /
Type is aangemaakt.
SQL> create type "SEARCH_SIGN_TAB_TYPE" IS TABLE OF SEARCH_SIGN_TYPE
2 /
Type is aangemaakt.
SQL> declare
2    err_cd varchar2(1000);
3    err_txt VARCHAR2(5000);
4    no_of_recs number;
5    out_sign_tab search_sign_tab_type:=search_sign_tab_type(search_sign_type(NULL,NULL,NULL,NULL,NULL));
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13    loop
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17 end;
18 /
The error is
The error is
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why null is introduced in the AND and OR truth table?when will a statement/part of a statement return a null value??
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|True               |True          |False             |Null             |
|False              |False          |False             |False           |
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sayantan chakraborty wrote:
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Simple Example:
SQL > WITH test_data AS
2 (
3          SELECT 1 AS X, 1 AS Y FROM DUAL UNION ALL
4          SELECT 2 AS X, 2 AS Y FROM DUAL UNION ALL
5          SELECT 3 AS X, 5 AS Y FROM DUAL UNION ALL
6          SELECT 4 AS X, 6 AS Y FROM DUAL UNION ALL
7          SELECT 1 AS X, NULL AS Y FROM DUAL
8 )
9 SELECT *
10 FROM    test_data
11 WHERE   X = Y
12 /
         X          Y
         1          1
         2          2

If statement in sql

regarding the following sql:
SELECT a.lname, a.fname, a.user_id, c.address, c.city,
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FROM users a, address c, maintstatetype d
WHERE a.user_id = c.user_id(+)
AND c.statetypeid = d.statetypeid(+)
AND c.addresstypeid in (1,2,3,4)
I have a database of users and addresses. Each user can
have multiple addresses and the addresses are
designated by addresstypeid. In plain english, what I want
to pull is "If they have an addresstypeid of 1, pull that one
only, if not, check if they have a 2 and use that, if not, check
for a 3, etc..".
Any help with this?

What you want, then, is to pull the address with the minimum addresstypeid ..
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AND c.statetypeid = d.statetypeid(+)
AND c.addresstypeid =
(select min(c2.addresstypeid)
from address c2
where c2.userid=a.userid
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SELECT a.lname, a.fname, a.user_id, c.address, c.city,
c.zip, c.addresstypeid, d.descriptor as state
FROM users a, address c, maintstatetype d
WHERE a.user_id = c.user_id
AND c.statetypeid = d.statetypeid
AND c.addresstypeid =
(select min(c2.addresstypeid)
from address c2
where c2.userid=a.userid
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If statement in reqular sql statement

Hi everyone;
I am trying to alter some trigger if I am in a certain environment. here what I am trying to do in pseudo-code
if ((select dbenv from environments) = 'DEV') THEN
ALTER TRIGGER XXX disable;
end if;
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reminder I don't want to do that from package or a procedure

this to just explain
i think select in the IF is not allowed that way please see the examples below
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2 vename VARCHAR2(10);
3 BEGIN
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7   ELSE
8     DBMS_OUTPUT.PUT_LINE('no data found');
9   END IF;
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11 /
data found
PL/SQL procedure successfully completed.
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Wrote file afiedt.buf
1 DECLARE
2 vename VARCHAR2(10);
3 BEGIN
4   --SELECT ename INTO vename FROM EMP WHERE ename='SMITH';
5   IF ((SELECT ename FROM EMP WHERE ename ='SMITH')='BLAKE') THEN
6    DBMS_OUTPUT.PUT_LINE('data found');
7   ELSE
8     DBMS_OUTPUT.PUT_LINE('no data found');
9   END IF;
10* END;
SQL> /
IF ((SELECT ename FROM EMP WHERE ename ='SMITH')='BLAKE') THEN
ERROR at line 5:
ORA-06550: line 5, column 7:
PLS-00103: Encountered the symbol "SELECT" when expecting one of the following:
( - + case mod new not null others <an identifier>
<a double-quoted delimited-identifier> <a bind variable> avg
count current exists max min prior sql stddev sum variance
execute forall merge time timestamp interval date
<a string literal with character set specification>
<a number> <a single-quoted SQL string> pipe
ORA-06550: line 5, column 50:
PLS-00103: Encountered the symbol ")" when expecting one of the following:
. ( * @ % & - + ; / at for mod rem <an exponent (**)> and or
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||
but this is allowed
SQL> ed
Wrote file afiedt.buf
1 DECLARE
2 vename VARCHAR2(10);
3 BEGIN
4   --SELECT ename INTO vename FROM EMP WHERE ename='SMITH';
5   IF 'BLAKE'='BLAKE' THEN
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10   END IF;
11* END;
SQL> /
SMITH
PL/SQL procedure successfully completed.formated
Message was edited by:
devmiral

IF statement in SQL*Plus - how to do it

Hi,
In SQL*Plus script, I would like to keep conditional checking (IF statement) and proceed. For example, whatever is done in PL/SQL block below, want to do the same in SQL*Plus script, I know partly it can be done using VARIABLE keyword, conditional checking can be done using DECODE in SELECT statement, but I want to carry out a more complex requirement, hence I want to use IF statement somehow in SQL*Plus.
Another question, how to do spooling in PL/SQL script, it can be done using UTL_FILE, any other option is there to achieve this.
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begin
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IF v_ind_count > 0
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/

Hello,
SQL*PLUS has no scripting language. It can only execute SQL and PL/SQL scripts. There are some commands like SPOOL or SET but no commands for conditional statements. You should describe your requirements, maybe we can find a way.
Or you can search the forum, maybe your question has already been answered
[Google for SQL*PLUS + condition|https://www.google.de/search?q=site%3Aforums.oracle.com+"SQL*PLUS"+condition]
# {message:id=4189517}
# {message:id=4105290}
how to do spooling in PL/SQL scriptFrom within PL/SQL you can use dbms_output, the spool has to be started by the calling SQL script when it is executed in SQL*PLUS. Or you can use utl_file, but then you can only write to a server directory, not into a client file. To give an advice we need more information about what you want to do.
Regards
Marcus

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If table testrh2 has the following columns and data
col1 --> NULL
col2 --> 2
and table testrh has the following columsn and data
col1 --> NULL
How could I write a dynamic SQL statement to join on the nulls? I've written the following block as a starting point.
declare
cursor c1 is select col1 from isis.testrh;
lval varchar2(1000);
lval2 varchar2(1000);
begin
for r1 in c1 loop
lval := 'select col2 from isis.testrh2 where col1 = '||r1.col1;
execute immediate lval into lval2;
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end loop;
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You can't compare null values with '=' in Oracle SQL.
Null can only be compared with <column> is null .
You can see it when you try these two queries:
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lval := 'select col2 from isis.testrh2 where col1 = '||r1.col1;
I think you could replace your two lines ( lval:= ... AND execute immediate) by this:
begin
select col2
into lval
from isis.testrh2
where decode(col1,r1.col1,1,0)=1;
dbms_output.put_line('lval='||lval);
exception
when no_data_found then
dbms_output.put_line('no data found'); -- or whatever you want
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