Condition 1 = 1 in a Where Clause

What purpose the following condition in a where clause generated by Oracle Discoverer serve? Just Curious !
And 1 = 1;

This is a very handy abd cool and slick thing to do in SQL. It allows for the SQL to run. Normally you see this as follows ...
SELECT/INSERT/UPDATE/DELETE ...
FROM TABLES ...
WHERE (all normal conditions)
AND
--[ABORT]
--[TRUE]
--1=0
--[FALSE]
1=1;
If you switch the 1=1 to 1=0 then the SQL will not run. It's a handy way for a programmer to turn on/off sections of code. Another handy method I use goes a little further ...
SELECT/INSERT/UPDATE/DELETE ...
FROM TABLES ...
WHERE (all normal conditions)
AND
--[ABORT]
1=(select abort_flag from t_abort);
So I have a master abort flag that I can switch from 1 to 0 as a process is running. That way my process can still continue but I turn off what ever sections I don't want to run if I set the abort_flag to 0.
Should I be in a multi user environment I usually have a view on the abort table so it only returns 1 record for that particular SID/USER that is running the process (so I don't abort other people's code).
Tyler D.

Similar Messages

Is order in which the conditions given in the 'WHERE' clause are imortant

Hi All,
Is the order in which the conditions are given in the 'WHERE' clause are important for
performance with regard to oracle query plan.
Regards

Short answer: no.
Longer answer: Well. probably not. If you are using very old versions of the database or the rule-based optimizer, you can probably find some corner cases where it mattered. If you are using a vaguely recent version of the database with the cost based optimizer, it shouldn't matter-- the optimizer is free to evaluate the conditions in whatever order it would like and it chooses to do so in the order that it expects to be most efficient. That said, as the number of objects and conditions increases, the number of possible permutations the CBO tries to consider increase dramatically to the point that an exhaustive analysis of all possible conditions isn't feasible. In that case, the optimizer will have to make a reasonable effort to explore the set of possible plans rather than doing an exhaustive search-- the order of conditions is likely to matter slightly in the optimizer's choice of which branches to explore and which to prune if there are many conditions with similar (or identical) costs. Now, that being said, it is very unlikely that you could do anything useful with this knowledge that would be able to force the optimizer to do something that you'd want. It's possible to do, of course, it's just not a particularly useful way of influencing the optimizer.
Justin

How to set two Conditions Simultaneously in set where clause

Hi,
I have a messgechoice item , and i need to fire messagechoice VO with two conditions.
For Eg:-- we have three Items ProjectContractor& Work Order on a custom Page , now i need work order list should populate on lelection of project & contractor both, so i have apply a fire partial event on contractor where i i get the parameter values as follows:--
CO Code
if("OrderNoself".equals(event))
String value21 = (String)pageContext.getParameter("ProjectName");
System.out.println("The Selected Project Name for self Contractor is "+value21);
String value22 = (String)pageContext.getParameter("ContractorName");
System.out.println("The SelectedContractor Name for ContractorName is "+value22);
Serializable [] params11 = {value21,value22} ;
am.invokeMethod("initWorkOrderNumberself",params11);
AM Code
public void initWorkOrderNumberself(String ProjectName,String ContractorName");
getDprWorkOrderpopVO1().setWhereClause("PROJECT_NAME = " + "'"+ProjectName+"'");
getDprWorkOrderpopVO1().setWhereClause("CONTRACTOR_NAME = " + "'"+ContractorName+"'");
getDprWorkOrderpopVO1().executeQuery();
Now when i run my form then Work order list only populateon set conditions ofContractor NAme only.
Please suggest....

Hi Tarun,
Thanx for ur reply,
i have used below mwntioned code provided by you but still i m getting error...
public void initWorkOrderNumber(String ProjectName,String ContractorName)
//getDprWorkOrderpopVO1().setWhereClause("CONTRACTOR_NAME = " + "'"+ContractorName+"'");
//getDprWorkOrderpopVO1().executeQuery();
getDprWorkOrderpopVO1().setWhereClause("PROJECT_NAME =:1 AND CONTRACTOR_NAME=:2");
getDprWorkOrderpopVO1().setWhereClauseParams(null);
getDprWorkOrderpopVO1().setWhereClauseParam(1,ProjectName);
getDprWorkOrderpopVO1().setWhereClauseParam(2,ContractorName);
getDprWorkOrderpopVO1().executeQuery();
ERROR:---
oracle.apps.fnd.framework.OAException: oracle.jbo.SQLStmtException: JBO-27122: SQL error during statement preparation. Statement: SELECT * FROM (select * from omaxe_work_order_headers
where work_order_number is not null) QRSLT WHERE (PROJECT_NAME =:1 AND CONTRACTOR_NAME=:2)
     at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:888)
     at oracle.apps.fnd.framework.OAException.wrapperException(OAException.java:862)
     at oracle.apps.fnd.framework.OAException.wrapperInvocationTargetException(OAException.java:985)
     at oracle.apps.fnd.framework.server.OAUtility.invokeMethod(OAUtility.java:210)
     at oracle.apps.fnd.framework.server.OAUtility.invokeMethod(OAUtility.java:152)
     at oracle.apps.fnd.framework.server.OAApplicationModuleImpl.invokeMethod(OAApplicationModuleImpl.java:721)
     at omaxe.oracle.apps.xxopa.boqmain.webui.OmaxeDPRCO.processFormRequest(OmaxeDPRCO.java:107)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequest(OAWebBeanHelper.java:799)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processFormRequest(OAWebBeanContainerHelper.java:363)
     at oracle.apps.fnd.framework.webui.OAPageLayoutHelper.processFormRequest(OAPageLayoutHelper.java:1118)
     at oracle.apps.fnd.framework.webui.beans.layout.OAPageLayoutBean.processFormRequest(OAPageLayoutBean.java:1579)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:995)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:961)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequest(OAWebBeanHelper.java:816)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processFormRequest(OAWebBeanContainerHelper.java:363)
     at oracle.apps.fnd.framework.webui.beans.form.OAFormBean.processFormRequest(OAFormBean.java:395)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:995)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequestChildren(OAWebBeanHelper.java:961)
     at oracle.apps.fnd.framework.webui.OAWebBeanHelper.processFormRequest(OAWebBeanHelper.java:816)
     at oracle.apps.fnd.framework.webui.OAWebBeanContainerHelper.processFormRequest(OAWebBeanContainerHelper.java:363)
     at oracle.apps.fnd.framework.webui.beans.OABodyBean.processFormRequest(OABodyBean.java:363)
     at oracle.apps.fnd.framework.webui.OAPageBean.processFormRequest(OAPageBean.java:2633)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:1659)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:497)
     at oracle.apps.fnd.framework.webui.OAPageBean.preparePage(OAPageBean.java:418)
     at OA.jspService(OA.jsp:40)
     at com.orionserver.http.OrionHttpJspPage.service(OrionHttpJspPage.java:56)
     at oracle.jsp.runtimev2.JspPageTable.service(JspPageTable.java:317)
     at oracle.jsp.runtimev2.JspServlet.internalService(JspServlet.java:465)
     at oracle.jsp.runtimev2.JspServlet.service(JspServlet.java:379)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:727)
     at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:306)
     at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:767)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:259)
     at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:106)
     at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:803)
     at java.lang.Thread.run(Thread.java:534)
## Detail 0 ##
java.sql.SQLException: ORA-01006: bind variable does not exist
Regards
Saurabh

Can we use where clause in Update on Merge statement?

Hi All,
I tried to execute the following Merge Query:
When this query is executed without ‘Where clause’ in Update statement its working fine. When executed with ‘Where clause’ it throwing the following error:
ORA-00905: missing keyword.
Following is the sample query which I tried to execute:
MERGE INTO TABLE_NAME
USING (SELECT COLUMN FORM TABLES)
ON (CONDITION)
WHEN MATCHED THEN
UPDATE SET
     COLUMN UPATES
WHERE CONDITION -- Can we use where clause here?
WHEN NOT MATCHED THEN
INSERT
INSERT VALUES;
Can some one help on this?
Thanks in advance.
Darius

Yes:
SQL> drop table emp1;
Table dropped.
SQL> create table emp1 as select * from emp where deptno = 30;
Table created.
SQL> update emp1 set sal = sal*2;
6 rows updated.
SQL> commit;
Commit complete.
SQL> select ename,sal from emp1;
ENAME             SAL
ALLEN            3200
WARD             2500
MARTIN           2500
BLAKE            5700
TURNER           3000
JAMES            1900
6 rows selected.
SQL> MERGE INTO emp1
2 USING(select * from emp) emp
3 ON (emp1.empno = emp.empno)
4 WHEN MATCHED THEN
5 UPDATE SET sal = emp.sal WHERE ename = 'TURNER'
6 WHEN NOT MATCHED THEN
7 INSERT(ename,sal) VALUES(emp.ename,emp.sal);
9 rows merged.
SQL> select ename,sal from emp1;
ENAME             SAL
ALLEN            3200
WARD             2500
MARTIN           2500
BLAKE            5700
TURNER 1500
JAMES            1900
SMITH             800
JONES            2975
CLARK            2450
SCOTT            3000
KING             5000
ENAME             SAL
ADAMS            1100
FORD             3000
MILLER           1300
14 rows selected.
SQL> SY.

Re: [iPlanet-JATO] How to make an OR in the WHERE clause of a SELECT

Harry,
If you get a reference to your model, you can set the
whereClauseOverride with exactly the string you want to use. Keep in
mind that you are dealing with a the raw SQL where clause, therefore,
you must use the actual table column names and not the model's logical
field names as they could be different.
QueryModelBase queryModel = (QueryModelBase)getModel(PersonModel.class);
// you must add the "WHERE" as well
String whereClause = "WHERE firstName LIKE '%max' OR lastName LIKE '%max%'";
queryModel.setWhereClauseOverride(whereClause);
Keep in mind that this will override all where criteria: static and
dynamic where criteria. Static criteria can be declared in your model
class: setStaticWhereCriteriaString(STATIC_WHERE_CRITERIA).
You could optionally get the entire SQL statement and replace the
__WHERE__ token yourself with a string replace technique. In fact, if
you want to add an ORDER BY, you will need to get the SQL and append to
the end.
queryModel.getSelectSQL();
Hope this helps. Let me know if you have any questions
craig
hlamer wrote:
Hi,
if I add criterias to my model
with "SelectQueryModel.addUserWhereCriterion()" they will be concated
with AND.
How can I add a criteria with OR?
I want something like:
SELECT personId, firstName, lastName
FROM Person
WHERE firstName LIKE "%max"
OR lastName LIKE "%max%"
Thanks.
Harry
For more information about JATO, including download information, please visit:
http://developer.iplanet.com/tech/appserver/framework/index.jsp

Rewritten your query wuth tags as well
{code}select "P_CIRCUITS_FIBER"."PORTS_1",
        "P_CIRCUITS_FIBER"."PORTS_2",
        CASE WHEN CPORT.ID = (select REGEXP_SUBSTR(ports_1,'[^,]+',1,1) from p_circuits_fiber)
             THEN "CPORT"."PORT_NO" END PORT_NO_1,
        CASE WHEN CPORT.ID = (select REGEXP_SUBSTR(ports_2,'[^,]+',1,1) from p_circuits_fiber)
             THEN "CPORT"."PORT_NO" END PORT_NO_2
from    "CPORT",
        "P_CIRCUITS_FIBER"
where   p_circuits_fiber.fiber_id = :P4000_CIRCUIT_NO
and     (select REGEXP_SUBSTR(ports_1,'[^,]+',1,1) from p_circuits_fiber) = "CPORT"."PORT_NO" "PORT_NO_1"
and     (select REGEXP_SUBSTR(ports_2,'[^,]+',1,1) from p_circuits_fiber) = "CPORT"."PORT_NO" "PORT_NO_2"{code}
Now we can see two columns references which should not be there.
I even not sure to understand why those two conditions are in the WHERE clause. But for sure, CPORT.ID cannot be equal to two values unless they are same.
Is there only one row in p_circuits_fiber ?
Nicolas.

Using :case when in where clause

Hello,
I need some help with using of case statement in a where clause
Table that contains info about employees taking some coursework:
Class (values could be SAP, ORACLE, JAVA)
Code (if Class is SAP then CODE is not null; if class is any other CODE is NULL)
Start Date (date they began class not null)
End Date (date then ended the class - could be null)
Employee Level(numbers from one through five)
I need a single LOV in forms that should show Employee_Level for input class,code,date.
How to do this?
I started off with this but get 'missing statement error'
select distinct employee_level from e_course
   where (
   case when &class='SAP' then code ='1' and start_date > to_date('20000101','YYYYMMDD') and
                                           end_date < to_date('20000101','YYYYMMDD')
           else
               null
   end) order by employee_level;Thanks

Hi,
user469956 wrote:
But all these examples have only one condition for each case.Depending on how you count, all WHERE clauses have only one condition.
I see an example in that thread that has 6 atomic conditions, linked by AND and OR.
I need to check date & code. This is what is causing the error.Why do you want to use a CASE statement?
Why can't you put all your conditions directly iinto a WHERE clause, soemthing like this:
WHERE   (   &class='SAP'
        AND code ='1'
OR      (   start_date > to_date('20000101','YYYYMMDD')
        AND end_date    < to_date('20000101','YYYYMMDD')
        )I said "something like this" because I don't know what you really want to do.

Case stament use in where clause grive error

i want to use this conditions but gives error. Please give me the solution of it
WHERE
CASE
WHEN CANCELLED_DATE IS NULL THEN
TO_DATE(INV_GL_DATE,'DD-MON-YY') <= TO_DATE (:P_DATE1,'DD-MON-YY')
ELSE
TO_DATE(INV_GL_DATE,'DD-MON-YY') >= TO_DATE(:P_DATE1,'DD-MON-YY')
END) --- <= TO_DATE(:P_DATE1,'DD-MON-YY')

Hi,
Remember that a CASE expression always evaluates to a single value in one of the SQL datatypes, such as VARCHAR2, NUMBER or DATE. (There is no Boolean datatype in SQL.)
You can't say
WHERE   CASE ... END;for the same reason that you can't say
WHERE   'Hello, world!';orWHERE   100;or
WHERE   SYSDATE;CASE expressions are really valuable because they allow you do perform IF-THEN-ELSE logic in places where you normally can't, like the SELECT clause.
The WHERE clause is a place where you can perform IF-THEN-ELSE logic anyway, so there's rarely a need for a CASE expression in a WHERE clause. It's just as efficient and just as clear (if not more so) to put all your conditions directly in the WHERE clause, like Max demonstrated.
Edited by: Frank Kulash on Feb 26, 2010 10:13 AM
user11995078 wrote:
Thanks Dear But how can we use with case and decodeWhy do you want to?
CASE does not help in this problem, any more than regular expressions or CONNECT BY or MODEL help. They are all great tools for particular jobs, but not for this job. Asking "How can I use CASE to do this?" Is like asking "How can I use a hammer to tighten a bolt?" Perhaps there is a way, but it's likely to be contrived and ridiculous.
Here's the least ridiculous way I can think of:
WHERE     ( TO_DATE (INV_GL_DATE, 'DD-MON-YY')
     - TO_DATE (:P_DATE1,     'DD-MON-YY')
     ) * CASE
             WHEN cancelled_date IS NULL THEN 1
                `                            ELSE -1
         END <= 0

Case or Decode in the Where clause

Dear all,
My requirement is:
If user select other then "ALL"option from the LOV the following condition should be part of the where clause.
current_req_status = :block1.req_statusIf user select "ALL" from the lov no need to append the above condition in the where clause.
Please give me the sample code
select request_id,doc_name,doc_code,part_id,current_req_status from test_table
where req_type = 'I'
and doc_code = :BLOCK1.doc_code
and -- Here is the condition is changed based on
        the :BLOCK1.req_status(LOV).
     -- If user select other then "All" option from
        this LOV the query append the below condition
        current_req_status = :block1.req_status
      -- Else no need append the above condition
         in the query where clause.Edited by: roots on Apr 10, 2012 9:31 AM
Edited by: roots on Apr 10, 2012 9:38 AM

Hi InoL,
In the database column not having "ALL" value inside. so the match does not return any values.
My LOV has "A1,A2,A3,A4,....ALL" . the database column having "A1,A2,A3,A4.......". here no "ALL" value.
So if user select "ALL" option from this LOV, that means select all vaules from the database (A1,A2,A3,A4......)..
If user select A1 from the lov the select query include only the matched
column values.from example,
select....
where nvl(database_column,'X')= nvl(:Block1.LOV_value)If user select "ALL" option then no need for above condition in the where clause so that query returns all the rows from the database column.
hope I've clearly explain my requirement.
Thanks lot,
Roots.

Urgent: Performance problem with where clause using IN and an OR condition

Select statement is:
select fl.feed_line_id
from ap_expense_feed_lines_all fl
where ((:1 is not null and
fl.feed_line_id in (select distinct r2.object_id
from xxdl_pcard_wf_routing_lists r2,
     per_people_f hr2
where upper(hr2.full_name) like upper(:1||'%')
          and hr2.person_id = r2.person_id
and r2.fyi_list is null
          and r2.sequence_number <> 0))
or
(:1 is null))
If I modify the statement to remove the "or (:1 is null))" part at the bottom of the where clause, it returns in .16 seconds. If I modify the statement to only contain the "(:1 is null))" part of the where clause, it returns in .02 seconds. With the whole statement above, it returns in 477 seconds. Anyone have any suggestions?
Explain plan for the whole statement is:
(1) SELECT STATEMENT CHOOSE
Est. Rows: 10,960 Cost: 212
FILTER
(2) TABLE ACCESS FULL AP.AP_EXPENSE_FEED_LINES_ALL [Analyzed]
(2) Blocks: 8,610 Est. Rows: 10,960 of 209,260 Cost: 212
Tablespace: APD
(6) TABLE ACCESS BY INDEX ROWID HR.PER_ALL_PEOPLE_F [Analyzed]
(6) Blocks: 4,580 Est. Rows: 1 of 85,500 Cost: 2
Tablespace: HRD
(5) NESTED LOOPS
Est. Rows: 1 Cost: 4
(3) TABLE ACCESS FULL XXDL.XXDL_PCARD_WF_ROUTING_LISTS [Analyzed]
(3) Blocks: 19 Est. Rows: 1 of 1,303 Cost: 2
Tablespace: XXDLD
(4) UNIQUE INDEX RANGE SCAN HR.PER_PEOPLE_F_PK [Analyzed]
Est. Rows: 1 Cost: 1
Thanks in advance,
Peter

Thanks for the reply, but I have already checked what you are suggesting and I am pretty sure those are not causing the problem. The hr2.full_name column has an upper index and the (4) line of the explain plan shows that index being used. In addition, that part of the query executes on its own quickly.
Because the sql is not displayed in an indented format on this page it is a little hard to understand the structure so I am going to restate what is happening.
My sql is:
select a_column
from a_table
where ((:1 is not null) and a_column in (sub-select statement)
or
(:1 is null))
The :1 bind variable is set to a varchar2 entered on the screen of an application.
If I execute either part of the sql without the OR condition, performance is good.
If the :1 bind variable is null with the whole sql statement (so all rows or a_table are returned), performance is still good.
If the :1 bind variable is a not-null value with the whole sql statement, performance stinks.
As an example:
where (('wa' is not null) and a_column in (sub-select statement)) -- fast
where (('wa' is null)) -- fast
where (('' is not null) and a_column in (sub-select statement) -- fast
or
('' is null))
where (('wa' is not null) and a_column in (sub-select statement) -- slow
or
('wa' is null))

How can I pass multiple condition in where clause with the join table?

Hi:
I need to collect several inputs at run time, and query the record according to the input.
How can I pass multiple conditions in where clause with the join table?
Thanks in advance for any help.
Regards,
TD

If you are using SQL-Plus or Reports you can use lexical parameters like:
SELECT * FROM emp &condition;
When you run the query it will ask for value of condition and you can enter what every you want. Here is a really fun query:
SELECT &columns FROM &tables &condition;
But if you are using Forms. Then you have to change the condition by SET_BLOCK_PROPERTY.
Best of luck!

Problem in case of or condition in where clause in case of leftouter joi.

hi
i am encountering a wierd problem.
in a select query if i have a left outer join and a or condition in where clause the order of condition in or matters and if i use a to_char problem is solved.
see query below
select * from custsupp left outer join Salesperson s on custsupp.sales_rep = s.id ,state a where (CS_FLAG='C' or CS_flag ='B') and custsupp.state = a.id
i have a single record in table custsupp with CS_FLAG ='B' the above does not return result. but if i move CS_FLAG='B' on left of or i.e
select * from custsupp left outer join Salesperson s on custsupp.sales_rep = s.id ,state a where (CS_FLAG='B' or CS_flag ='C') and custsupp.state = a.id
i get the rsult.
also if i remove left outer join and keep order of condition as it is i get result i.e
select * from custsupp ,state a where (CS_FLAG='C' or CS_flag ='B') and custsupp.state = a.id
also if i add a to_char to co,umns CS_FLAG i get the result.
select * from custsupp left outer join Salesperson s on custsupp.sales_rep = s.id ,state a where (to_char(CS_FLAG)='C' or to_char(CS_flag ='B')) and custsupp.state = a.id
why it is so?
CS_flag is of type nchar
Shreyas
Edited by: shreyasd on Jun 9, 2010 11:07 PM

First if you don't want to take credit of the free sample then follow the below procedure:
1. Do the GRN for all the three item and for the free item in the excise tab at the item level select the material as non cenvatable. Just remember to add base value of the item
2. If you want to capture the Part1 entry then just do the normal transaction and while posting the excise with J1IEX just remove the excise duties for the free item.
3. For paying the vendor the excise amount, just do subsequent debit in the MIRO and in the details tab add in the unplanned delivery cost the amount that you want to pay for the excise duties
Second case if you want to take credit of the duties:
1. Do the Normal GRN process, add the base value and excise values for the free item.
2. Post the Excise duites with J1iEX.
3. The with the account entry you can settle the excise payment
Hope this will help you
Enjoyyyyyyyyyyy
Akshit

Function-based Index and an OR-condition in the WHERE-clause

We have some problems with functin-based indexes and
the or-condition in a where-clause.
(We use oracle 8i (8.1.7))
create table TPERSON(ID number(10),NAME varchar2(20),...);
create index I_NORMAL_TPERSON_NAME on TPERSON(NAME);
create index I_FUNCTION_TPERSON_NAME on TPERSON(UPPER(NAME));
The following two statements run very fast on a large table
and the execution-plan asure the usage of the indexes
(-while the session is appropriate configured and the table is analyzed):
1)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%';
2)     select count(ID) from TPERSON where NAME like 'Mil%' or (3=5);
In particular we see that a normal index is used while the where-clause contains
an OR-CONDITION.
But if we try the similarly select-statement
3)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%' or (3=5);
the CBO will not use the function-index.
(This behavior we only expect with views but not with indexes.)
We ask for an advice like an hint, which enable the CBO-usage
of function-based indexes in connection with OR.
This problem seems to be artificial because it contains this dummy logic:
     or (3=5).
This steams from an prepared statement, where this kind of boolean
flag reduce the amount of different select-statements needed for
covering the hole business-logic, while using bind-variables for the
concrete query-parameters.
A more realistic (still boild down) version of our prepared select-statement run in
SQL Plus:
define x_name = 'MIL%';
define x_firstname = '';
select * FROM TPERSON
where (upper(NAME) like '&x_name' or ( '&x_name' = ''))
and (upper(FIRSTNAME) like '&x_firstname' or ('&x_firstname' = ''))
and ...;
In particular we dont refernce the tablecolumn , but the QUERY-Parameter
yield the second boolean value in the or-condition.
The problem is that this condition ('&x_name' = '') dont use any index.
thanks a lot for spending your time with this problem

Try
SELECT /*+ RULE */
as your hint. I don't have the book with me, but this last weekend I read a section about your very problem. The book was a Oracle Press gold cover about Oracle 8i Performance tuning. If you e-mail me I can quote you the chapter when I get home Friday.

Where clause with conditions

Hi all,
I have a report that is to be filtered based on user input into a text field and drop down list.
The goal is to let the user enter either an exact value (based off auto-complete functionality), or use the wildcard character, %
This is where the drop down comes in. If they select value1, the autocomplete, exact value is used and the where clause would look like something below,
select col1, col2, col3
from table
where :P1_FILTER in (select distinct col2 from another_table)If they select value2, then the where should process using the like function and %s. Something like,
select col1, col2, col3
from table
where :P1_FILTER like (select distinct col2 from another_table)How can I take care of this in 1 where clause? I'm sort of stuck trying to figure it out.
Thank you for any help.
-Chris

I don't believe the way you have it coded is correct.. Can you move it over o SQL Developer of the SQL Commands page in APEX and trying running your query? If it doesn't work there then your SQL is coded wrong.
Since you are trying to have One or The Other condition be used for your query, I would think the Function returning Sql Code would be the obvious selection, but I could be wrong here...
Thank you,
Tony Miller
Webster, TX
A lady came up to me on the street, pointed at my suede jacket and said "Do you know a cow was murdered to make that jacket?"
"I didn't know there were any witnesses", I replied " Now I'll have to kill you too"

Conditional where clauses in database adapter

I am trying to write a query in a database adapter that allows for conditional where clauses. Specifically, I want to include or not include a where clause (and clause) if an input variable is empty or not. Can a prepared statement with lexical parameters be used in a database adapter? Or is there another way to do this?
Thanks in advance.

I am afraid that you can only bind parameters to the SQL, you can't bind the SQL itself to the SQL. We do have QueryByExample support, where based on what fields are set in an example object, it will construct a different SQL select.
If you pass in
<Address>
<street/>
<city>
<state>CA</state>
</Address>
it will return all addresses in California. If you pass in:
<Address>
<street/>
<city>Los Angeles</city>
<state/>
</Address>
it will return all addresses in Los Angeles.
Thanks
Steve

How to use the MAX DATE condition in WHERE CLAUSE FILEDS

Hi,
I am trying to fetch the result for getting maximun date but when i try to execute the query i am getting the error as follows.
CONDITION : trunc(max(RD.DATERECEIVED)) BETWEEN TO_DATE('01/08/2011','DD/MM/YYYY') AND TO_DATE('01/08/2011','DD/MM/YYYY')
ERROR: Group function is not allowed here.
CHEERS,
PRABU AMMAIAPPAN

I see a couple of problems here.
First, what you posted below is not a syntactically valid query. It seems to be part of a larger query, specifically, this looks to be only the GROUP BY clause of a query.
Prabu ammaiappan wrote:
Hi,
I Have a group function in the Query. Below is the Query i have used it,
GROUP BY S.FREIGHTCLASS,
R.CONTAINERKEY,
S.SKU,
S.DESCR ||S.DESCRIPTION2,
S.PVTYPE,
RD.LOTTABLE06,
R.WAREHOUSEREFERENCE,
RD.TOLOC,
R.ADDWHO,
R.TYPE,
S.CWFLAG,
S.STDNETWGT,
S.ORDERUOM,
R.ADDDATE,
C.DESCRIPTION,
(CASE WHEN P.POKEY LIKE '%PUR%' THEN 'NULL' ELSE to_char(P.PODATE,'dd/mm/yyyy') END),
NVL((CASE WHEN R.ADDWHO='BOOMI' THEN RDD.SUPPLIERNAME END),SS.COMPANY),
RDD.BRAND,
S.NAPA,
RD.RECEIPTKEY,
R.SUSR4,
P.POKEY,
RDD.SUSR1,
r.STATUS, DECODE(RDD.SUSR2,' ',0,'',0,RDD.SUSR2),
rd.SUSR3Second, the answer to your primary question, "How do I add a predicate with with a MAX() function to my where clause?" is that you don't. As you discovered, if you attempt to do so, you'll find it doesn't work. If you stop and think about how SQL is processed, it should make sense to you why the SQL is not valid.
If you want to apply a filter condition such as:
trunc(max(RD.DATERECEIVED)) BETWEEN TO_DATE('01/08/2011','DD/MM/YYYY') AND TO_DATE('01/08/2011','DD/MM/YYYY')you should do it in a HAVING clause, not a where clause:
select ....
from ....
where ....
group by ....
having max(some_date) between this_date and that_date;Hope that helps,
-Mark

Sequence of tables in from clause and sequence of "where clause" conditions

Is Sequence of tables in "From Clause" and sequence of "where clause" conditions matters in 10g for performance?
Edited by: user6763079 on Jun 1, 2011 3:33 AM

user6763079 wrote:
Is Sequence of tables in "From Clause" and sequence of "where clause" conditions matters in 10g for performance?In general it does not matter.
It could matter if the Rule Based Optimizer (RBO) is used. However this RBO is only used if enforced by a hint or if no table statistics are collected. Starting from 10g the table statistics are automatically selected by a regular database job. So in general the CBO would be used.
The CBO will consider different access paths. If the number of tables is low enough, then all possible combinations are considered and the order does not make any difference.
Edited by: Sven W. on Jun 1, 2011 4:00 PM

Condition 1 = 1 in a Where Clause

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