DECODE inside the WHERE clause

Hello All:
I can't get the DECODE statement to work inside my WHERE clause. I have read the information on
tahiti.oracle.com
http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/functions049.htm#i1017437
But still can't get it working. Originally I had it working as dynamic SQL and then execute that string, but I am not allowed to use dynamic SQL and need to use "Real" PL/SQL.
I have the following WHERE clause (more info after the WHERE clause)
WHERE
     a.ebiz_asn_no(+) = te.ebiz_cntrl_no
     AND w.ebiz_work_no(+) = te.ebiz_cntrl_no
     AND o.ebiz_ord_no(+) = ebiz_cntrl_no
     AND t.ebiz_trailer_no(+) = te.ebiz_trailer_no
     AND ms.ebiz_sku_no(+) = te.ebiz_sku_no
     AND NVL(ms.ebiz_sku_no, -1) = NVL(p_SKU, nvl(ms.ebiz_sku_no, -1))
     AND tl.ebiz_lp_no(+) = te.ebiz_lp_no
     AND NVL(te.ebiz_lp_no, -1) = NVL(p_LP, nvl(te.ebiz_lp_no, -1))
     AND eu.ebiz_user_no(+) = te.act_ebiz_user_no
     AND NVL(te.act_ebiz_user_no, -1) = NVL(p_UserID, NVL(te.act_ebiz_user_no, -1))
     AND NVL(te.begin_location, '~') = NVL(p_BeginLocation, NVL(te.begin_location, '~'))
     AND NVL(te.end_location, '~') = NVL(p_EndLocation, NVL(te.end_location, '~'))
     AND te.comp_id = p_CompID
     AND te.site_id = p_SiteID
     AND INSTR('' || p_TaskType || '', te.task_type) > 0
     AND NVL(task_priority, -1) = NVL(p_Priority, NVL(task_priority, -1))
     AND NVL(te.ebiz_cntrl_no, -1) = DECODE(te.task_type, 'IULD', DECODE(p_Order, null, te.ebiz_cntrl_no, ebiz_po2asn.get_ebiz_po_no(p_Order)), NVL(p_Order, NVL
                       (te.ebiz_cntrl_no,-1)))
     AND NVL(te.batch_no,'~') = NVL(p_Batch, NVL(te.batch_no, '~'))
     AND NVL(te.ebiz_wave_no, -1) = NVL(p_Wave, NVL(te.ebiz_wave_no, -1))
     || whereClauseStatus
     || whereClauseFromDate
     || whereClauseToDate;As you can see, originally I was appending values of "whereClauseStatus, whereClauseFromDate, whereClauseToDate" and this was set with the following PL/SQL code:
     IF(p_TaskStatus = 'C') THEN
          --     Set From Date Clause
          IF(p_FromShipDate IS NOT NULL) THEN
               whereClauseFromDate := ' AND TRUNC(te.act_end_date) >= TO_DATE(''' || p_FromShipDate || ''',''MM/dd/yyyy'') ';
          END IF;
          --     Set To Date Clause
          IF (p_ToShipDate IS NOT NULL) THEN
               whereClauseToDate := ' AND TRUNC(te.act_end_date) <= TO_DATE(''' || p_ToShipDate || ''',''MM/dd/yyyy'') ';
          END IF;
     ELSE
          --     Incomplete and All statuses are filtered on the currdate
          --     Set From Date Clause
          IF(p_FromShipDate IS NOT NULL) THEN
               whereClauseFromDate := ' AND TRUNC(te.currdate) >= TO_DATE(''' || p_FromShipDate || ''',''MM/dd/yyyy'') ';
          END IF;
          --     Set To Date Clause
          IF (p_ToShipDate IS NOT NULL) THEN
               whereClauseToDate := ' AND TRUNC(te.currdate) <= TO_DATE(''' || p_ToShipDate || ''',''MM/dd/yyyy'') ';
          END IF;
     END IF;
     IF (p_TaskStatus = 'I') THEN
          whereClauseStatus := ' AND act_end_date IS NULL ';
     ELSIF (p_TaskStatus = 'C') THEN
          whereClauseStatus := ' AND act_end_date IS NOT NULL ';
     ELSE
          whereClauseStatus := '';
     END IF;I am having serious issues getting the DECODE statement to replace the three appended variables.
Any help would be greatly appreciated.
Thanks
Andy
Edited by: BluShadow on 02-Aug-2011 15:11
added {noformat}{noformat} tags for clarity. Please read {message:id=9360002} and learn to do this yourself.

I'm going to take a wild stab in the dark and suggest that this may be what you are looking for...
WHERE
     a.ebiz_asn_no(+) = te.ebiz_cntrl_no
     AND w.ebiz_work_no(+) = te.ebiz_cntrl_no
     AND o.ebiz_ord_no(+) = ebiz_cntrl_no
     AND t.ebiz_trailer_no(+) = te.ebiz_trailer_no
     AND ms.ebiz_sku_no(+) = te.ebiz_sku_no
     AND NVL(ms.ebiz_sku_no, -1) = NVL(p_SKU, nvl(ms.ebiz_sku_no, -1))
     AND tl.ebiz_lp_no(+) = te.ebiz_lp_no
     AND NVL(te.ebiz_lp_no, -1) = NVL(p_LP, nvl(te.ebiz_lp_no, -1))
     AND eu.ebiz_user_no(+) = te.act_ebiz_user_no
     AND NVL(te.act_ebiz_user_no, -1) = NVL(p_UserID, NVL(te.act_ebiz_user_no, -1))
     AND NVL(te.begin_location, '~') = NVL(p_BeginLocation, NVL(te.begin_location, '~'))
     AND NVL(te.end_location, '~') = NVL(p_EndLocation, NVL(te.end_location, '~'))
     AND te.comp_id = p_CompID
     AND te.site_id = p_SiteID
     AND INSTR('' || p_TaskType || '', te.task_type) > 0
     AND NVL(task_priority, -1) = NVL(p_Priority, NVL(task_priority, -1))
     AND NVL(te.ebiz_cntrl_no, -1) = DECODE(te.task_type, 'IULD', DECODE(p_Order, null, te.ebiz_cntrl_no, ebiz_po2asn.get_ebiz_po_no(p_Order)), NVL(p_Order, NVL
                       (te.ebiz_cntrl_no,-1)))
     AND NVL(te.batch_no,'~') = NVL(p_Batch, NVL(te.batch_no, '~'))
     AND NVL(te.ebiz_wave_no, -1) = NVL(p_Wave, NVL(te.ebiz_wave_no, -1))
     AND TRUNC(te.act_end_date) >= NVL(TO_DATE(p_FromShipDate,'MM/dd/yyyy'),TRUNC(te.act_end_date))
        AND TRUNC(te.act_end_date) <= NVL(TO_DATE(p_ToShipDate,'MM/dd/yyyy'),TRUNC(tw.act_end_date))
        AND TRUNC(te.currdate) >= NVL(TO_DATE(p_FromShipDate,'MM/dd/yyyy'),TRUNC(te.currdate))
     AND TRUNC(te.currdate) <= NVL(TO_DATE(p_ToShipDate,'MM/dd/yyyy'),TRUNC(te.currdate))
        AND ( (act_end_date IS NULL AND p_TaskStatus = 'I')
            OR (act_end_date IS NOT NULL AND p_TaskStatus = 'C')
            OR p_TaskStatus NOT IN ('I','C')
            )Edited by: BluShadow on 02-Aug-2011 16:27
missed the last clause. oops.

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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.
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Please give me the sample code
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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.
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hope I've clearly explain my requirement.
Thanks lot,
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Decode/Case in Where clause

Hello,
We are experiencing an issue with a Select statement that uses Decode in the Where clause. Specifically, it seems to be ignoring a nested Decode and just returning the default value. We have another nested decode that works fine, though.
A member of our team mentioned that he believed there was an issue with using Decode and Case statements inside of a where clause within HTML DB...Is this correct? If it is, is there a workaround? Since the nested Decode works elsewhere in this statement, that doesn't seem right.
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/*Alphabetical order
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Thanks,
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Scott: Did you try running that SQL statement in SQL Workshop in Apex? You can run it as it is, it will popup a window asking you to enter values for the bind variables.
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http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:110612348061

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By the way, the error I get is this,
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Problem with DECODE block in WHERE clause

Hi,
I'm facing problem with DECODE statement. I just simulated my problem in the simple way as follows. If I execute this following query, I should get "hello", but I'm not getting anything (ZERO rows returned).
SELECT 'hello' FROM DUAL
WHERE 'sample1' in (DECODE(1, 1, '''sample1'', ''sample2'', ''sample3''',
2, '''sample4'', ''sample5'', ''sample6'''
I think some problem is there in my WHERE clause.
But When I'm exeucting the following query as a seperate query, then I'm getting the value of DECODE block properly, but didn;t understnad why its not returning the same way when I'm putting the same DECODE statement in WHERE clause.
SELECT DECODE(1, 1, '''sample1'', ''sample2'', ''sample3''',
2, '''sample4'', ''sample5'', ''sample6'''
FROM DUAL;
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Thanks,
Ramji.

The value returned by SELECT DECODE(1, 1, '''sample1'', ''sample2'', ''sample3''',2, '''sample4'', ''sample5'', ''sample6''') FROM DUAL;
'sample1', 'sample2', 'sample3' is a single string. Consider it x.
SELECT 'hello' FROM DUAL WHERE 'sample1' in ( DECODE(1, 1, '''sample1'', ''sample2'', ''sample3''',2, '''sample4'', ''sample5'', ''sample6'''));
is like SELECT 'hello' FROM DUAL WHERE 'sample1' in ('x');
or
SELECT 'hello' FROM DUAL WHERE 'sample1' in ('''sample1'', ''sample2'', ''sample3''') and not
SELECT 'hello' FROM DUAL WHERE 'sample1' in ('sample1', 'sample2', 'sample3');
For this same reason SELECT 'hello' FROM DUAL WHERE 'sample1' in (select '''sample1'', ''sample2'', ''sample3''' from dual);
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Please use INSTR to find whether 'sample1' exists in the string 'sample1', 'sample2', 'sample3'.

How can we use DECODE function in where clause.

Hi Guys,
I have to use DECODE function in where clause.
like below
select * from tab1,tab2
where a.tab1 = b.tab2
and decode(code, 'a','approved')
in this manner its not accepting?
Can any one help me on this or any other aproach?
Thanks
-LKR

>
I am looking for to decode the actual db value something in different for my report.
like if A then Accepted
elseif R then Rejected
elseif D then Denied
these conditions I have to check in where clause.
>
what are you trying to do?
may be you are looking for
select * from tab1,tab2
where a.tab1 = b.tab2
and
   (decode(:code, 'A','Accepted') = <table_column>
    or
    decode(:code, 'R','Rejected') = <table_column>
   or
    decode(:code, 'D','Denied') = <table_column>
   )

Using decode to define "where" clause

Gurus,
Before, I was unioning several queries to get my desired results. Is there a way to utilize decode to define my "where" conditions?
Thanks
msi.global_attribute1               HTS_Number,
msi.global_attribute2               ECCN_Number ,
msi.market_price                    price,     --- double-check
decode(msi.serial_number_control_code,5,'Serial','Lot') control_type,
-- add item_type
--Item Label Creation        At Receipt or At Sales Order Issue
(case
when enabled_flag = 'Y' and end_date_active is null then 'Active'
when enabled_flag = 'Y' and end_date_active > sysdate then 'Active'
when enabled_flag = 'Y' and end_date_active < sysdate then 'Inactive'
when enabled_flag = 'N' then 'Inactive'
else 'Active'
end) status,
from inv.mtl_system_items_b   msi,
     po_hazard_classes    phc,
    po_un_numbers        pun
where msi.hazard_class_id = phc.hazard_class_id(+)
and   msi.un_number_id = pun.un_number_id(+)
and   msi.organization_id = 543
and   msi.creation_date = msi.last_update_date
--and   'New Items' = nvl(p_item_status,'All Items') --p_item_status
and   decode('New Items', --p_item_status,
      'New Items', (msi.creation_date = msi.last_update_date),
      'Updated Items', (msi.creation_date <> msi.last_update_date),
      'All Items', (1=1), (1=1))
and msi.segment2 = '14078'

Hi,
sreese wrote:
Before, I was unioning several queries to get my desired results. Is there a way to utilize decode to define my "where" conditions?Depending on what you mean, yes.
Whenever you have a problem, please post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) from all tables involved.
Also post the results you want from that data, and an explanation of how you get those results from that data, with specific examples.
Simplify the problem as much as possible. Remove all tables and columns that play no role in this problem.
Always say which version of Oracle you're using.
Here's an example of two UNIONed queries:
SELECT       deptno
,       SUM (sal)     AS total_sal
,       'MANAGEMENT'     AS grp_name
FROM       scott.emp
WHERE       job     IN ('MANAGER', 'PRESIDENT')
GROUP BY deptno
     UNION ALL
SELECT       deptno
,       SUM (sal)     AS total_sal
,       'OLD-TIMERS'     AS grp_name
FROM       scott.emp
WHERE       hiredate     < DATE '1984-01-01'
GROUP BY deptno
ORDER BY deptno
,            grp_name
;Output:
`   DEPTNO TOTAL_SAL GRP_NAME
        10       7450 MANAGEMENT
        10       8750 OLD-TIMERS
        20       2975 MANAGEMENT
        20       6775 OLD-TIMERS
        30       2850 MANAGEMENT
        30       9400 OLD-TIMERSA more efficient way to get the same information, without a UNION is:
SELECT       deptno
,       SUM (CASE WHEN job IN ('MANAGER', 'PRESIDENT') THEN sal END)     AS management
,       SUM (CASE WHEN hiredate < DATE '1984-01-01'      THEN sal END)     AS old_timers
FROM       scott.emp
WHERE       job          IN ('MANAGER', 'PRESIDENT')
OR       hiredate     < DATE '1984-01-01'
GROUP BY deptno
ORDER BY deptno
;Output:
`   DEPTNO MANAGEMENT OLD_TIMERS
        10       7450       8750
        20       2975       6775
        30       2850       9400As you can see, the results aren't exactly the same. UNION makes it easy to get more rows in the output than there are in the original; CASE (or DECODE,you can use whichever you like) makes it easy to get fewer rows and more columns. If you reallt want one kind of output or the other, it can be done with a little more work using either UNION or CASE.
When using CASE, the WHERE clause is typically more inclusive than any of the WHERE caluses in the UNION. Some of the conditions (in this example, all of the conditions) that were in the separate WHERE clauses of the UNION get changed to be conditions in separate CASE expressions.

Function-based index with OR in the wher-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 I_FUNCTION_TPERSON_NAME and we have a full table scan in the execution-plan.
(This behavior we only expect with views but not with indexes.)
We ask for an advice like a 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 select-statement is:
select * FROM TPERSON
where (upper(NAME) like 'MIL%' or (NAME is null))
and (upper(FIRSTNAME) like 'MICH% or (FIRSTNAME is null))
and ...;
thank you for time..
email: [email protected]

In the realistic statement you write :
select * FROM TPERSON
where (upper(NAME) like 'MIL%' or (NAME is null))
and (upper(FIRSTNAME) like 'MICH% or (FIRSTNAME is null))
and ...;
as far as i know, NULL values are not indexed, "or (NAME is NULL)" have to generate a full table scan.
HTH
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 I_FUNCTION_TPERSON_NAME and we have a full table scan in the execution-plan.
(This behavior we only expect with views but not with indexes.)
We ask for an advice like a 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 select-statement is:
select * FROM TPERSON
where (upper(NAME) like 'MIL%' or (NAME is null))
and (upper(FIRSTNAME) like 'MICH% or (FIRSTNAME is null))
and ...;
thank you for time..
email: [email protected]

Using if logic in the where clause of a select statement

I have a select clause. And in the select clause there is a variable all_off_trt that can be 'Y' or 'N'.
In the where clause I want to make it so that if a form variable is checked and all_off_trt is 'Y' then
exclude it else if the form variable isn't checked then select it no matter what all_off_trt is.
Is there any way to include either and if statement or a case statement within the where clause to acheive this? If not is there another way of doing it?
Basically I am looking for a case statement like this
case
when all_off_trt = 'Y' and mail_para.code = 'Y' then false
else true
end
Message was edited by:
Tugnutt7

Ok, so that really doesn't solve my problem. I have 3 different fields that I need to do that with. Each combining in a select statement to print an email list, as well as other thing limiting the where clause.
This is currently what I have, tested and working 100%.
cursor email_cur is
select unique p.email,s.all_off_trt,s.all_deceased,s.no_enroll
from participant p, trialcom t, ethics s
where p.status='A'
and p.surname=t.surname
and p.initials=t.initials
and s.trial_cd = t.tricom
and s.centre = t.centre
and p.email is not null
and (t.centre in (select code from mail_parameters where user_name=user and mail_para='CENTRE')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='CENTRE'))
and (t.tricom in (select code from mail_parameters where user_name=user and mail_para='TRIAL')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='TRIAL'))
and (t.role in (select code from mail_parameters where user_name=user and mail_para='ROLE')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='ROLE'))
and (p.country in (select code from mail_parameters where user_name=user and mail_para='COUNTRY')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='COUNTRY'))
and (t.represent in (select code from mail_parameters where user_name=user and mail_para='REPRESENT')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='REPRESENT'));
This is in a program unit that runs when a button is clicked. At the end of that I need to add on the 3 case statements that help further narrow down the selection of emails to be printed. Then it prints the emails selected from this statement into a file. So it has to be done right in the select statement. The three table variables are the all_off_trt, all_deceased, and no_enroll. The form has 3 checkboxes. One for each, that when checked (giving the variable associated with the checkboxes a value of 'Y') excludes all emails that have a 'Y' in the coresponding table variable.

Values from a Multi-Select in the where clause of a Select statement

I have a web page that solicits query parameters from the user.
The selections that the user makes will populate the WHERE clause of a Select statement.
One of the controls on the page is a multi-select control.
When this page posts, I would like to execute a Select statement wherein the selected values from this control appear in the .. Column IN ( <list here> ) portion of the WHERE clause.
This is an extremely common scenario, but I cannot seem to locate a how-to or message thread that addresses this specific case.
I have an idea that it may involve dynamic SQL or Execute Immediate, but cannot seem to pin down the answer.
Any help would be greatly appreciated!

anonymous - As illustrated here: Re: Search on a typed in list of values
Scott

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.

Performance with dates in the where clause

Performance with dates in the where clause
CREATE TABLE TEST_DATA
FNUMBER NUMBER,
FSTRING VARCHAR2(4000 BYTE),
FDATE DATE
create index t_indx on test_data(fdata);
query 1: select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
query 2: select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
query 3: select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_date('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
My questions:
1) Why isn't the index t_indx used in Execution plan 1?
2) From the execution plan, I see that query 2 & 3 is better than query 1. I do not see any difference between execution plan 2 & 3. Which one is better?
3) I read somewhere - "Always check the Access Predicates and Filter Predicates of Explain Plan carefully to determine which columns are contributing to a Range Scan and which columns are merely filtering the returned rows. Be sceptical if the same clause is shown in both."
Is that true for Execution plan 2 & 3?
3) Could some one explain what the filter & access predicate mean here?
Thanks in advance.
Execution Plan 1:
SQL> select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
COUNT(*)
283
Execution Plan
Plan hash value: 1486387033
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 517 (20)| 00:00:07 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | TABLE ACCESS FULL| TEST_DATA | 341 | 3069 | 517 (20)| 00:00:07 |
Predicate Information (identified by operation id):
2 - filter(TRUNC(INTERNAL_FUNCTION("FDATE"))=TRUNC(SYSDATE@!))
Note
- dynamic sampling used for this statement
Statistics
4 recursive calls
0 db block gets
1610 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed
Execution Plan 2:
SQL> select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
COUNT(*)
283
Execution Plan
Plan hash value: 1687886199
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | FILTER | | | | | |
|* 3 | INDEX RANGE SCAN| T_INDX | 283 | 2547 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter(TRUNC(SYSDATE@!)<=TRUNC(SYSDATE@!)+.9999884259259259259259
259259259259259259)
3 - access("FDATE">=TRUNC(SYSDATE@!) AND
"FDATE"<=TRUNC(SYSDATE@!)+.999988425925925925925925925925925925925
9)
Note
- dynamic sampling used for this statement
Statistics
7 recursive calls
0 db block gets
76 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows
Execution Plan 3:
SQL> select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_dat
e('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
COUNT(*)
283
Execution Plan
Plan hash value: 1687886199
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 9 | 3 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 9 | | |
|* 2 | FILTER | | | | | |
|* 3 | INDEX RANGE SCAN| T_INDX | 283 | 2547 | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
2 - filter(TO_DATE('21-APR-10','dd-MON-yy')<=TO_DATE('21-APR-10
23:59:59','DD-MON-YY hh24:mi:ss'))
3 - access("FDATE">=TO_DATE('21-APR-10','dd-MON-yy') AND
"FDATE"<=TO_DATE('21-APR-10 23:59:59','DD-MON-YY hh24:mi:ss'))
Note
- dynamic sampling used for this statement
Statistics
7 recursive calls
0 db block gets
76 consistent gets
0 physical reads
0 redo size
412 bytes sent via SQL*Net to client
380 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
1 rows processed

Hi,
user10541890 wrote:
Performance with dates in the where clause
CREATE TABLE TEST_DATA
FNUMBER NUMBER,
FSTRING VARCHAR2(4000 BYTE),
FDATE DATE
create index t_indx on test_data(fdata);Did you mean fdat<b>e</b> (ending in e)?
Be careful; post the code you're actually running.
query 1: select count(*) from TEST_DATA where trunc(fdate) = trunc(sysdate);
query 2: select count(*) from TEST_DATA where fdate between trunc(sysdate) and trunc(SYSDATE) + .99999;
query 3: select count(*) from TEST_DATA where fdate between to_date('21-APR-10', 'dd-MON-yy') and to_date('21-APR-10 23:59:59', 'DD-MON-YY hh24:mi:ss');
My questions:
1) Why isn't the index t_indx used in Execution plan 1?To use an index, the indexed column must stand alone as one of the operands. If you had a function-based index on TRUNC (fdate), then it might be used in Query 1, because the left operand of = is TRUNC (fdate).
2) From the execution plan, I see that query 2 & 3 is better than query 1. I do not see any difference between execution plan 2 & 3. Which one is better?That depends on what you mean by "better".
If "better" means faster, you've already shown that one is about as good as the other.
Queries 2 and 3 are doing different things. Assuming the table stays the same, Query 2 may give different results every day, but the results of Query 3 will never change.
For clarity, I prefer:
WHERE fdate >= TRUNC (SYSDATE)
AND fdate < TRUNC (SYSDATE) + 1(or replace SYSDATE with a TO_DATE expression, depending on the requirements).
3) I read somewhere - "Always check the Access Predicates and Filter Predicates of Explain Plan carefully to determine which columns are contributing to a Range Scan and which columns are merely filtering the returned rows. Be sceptical if the same clause is shown in both."
Is that true for Execution plan 2 & 3?
3) Could some one explain what the filter & access predicate mean here?Sorry, I can't.

How to change recordset bahaviour to accept dynamic column names in the where clause

Hi
im using php-mysql and i make a recordset and i want to make the column names in the where clause to be dynamic like
"select id,name from mytable where $tablename-$myvar";
but when i do this my i break the recordset and it disappear
and when i use variables from advanced recordset it only dynamic for the value of the column not for the column name
and when i write the column name to dynamic as above by hand it truns a red exclamation mark on the server behaviour panel
so i think the only way is to change the recordset behaviour is it? if so How to make it accept dynamic column names?
thanks in advance.

As bregent has already explained to you, customizing the recordset code will result in Dreamweaver no longer recognizing the server behavior. This isn't a problem, but it does mean that you need to lay out your dynamic text with the Bindings panel before making any changes. Once you have changed the recordset code, the Bindings panel will no longer recognize the recordset fields.
Using a variable to choose a column name is quite simple, but you need to take some security measures to ensure that the value passed through the query string isn't attempting SQL injection. An effective way of doing this is to create an array of acceptable column names, and check that the value matches.
// create array of acceptable values
$valid = array('column_name1', 'column_name2', 'column_name3');
// if the query string contains an acceptable column name, use it
if (isset($_GET['colname']) && in_array($_GET['colname'], $valid)) {
$col = $GET['colname'];
} else {
// set a default value if the submitted one was invalid
$col = 'column_name1'
You can then use $col directly in the SQL query.

JSP, Data Web Bean, BC4J: Setting the where clause of a View Object at run time

Hi,
I am trying to develop a data web bean in which the where clause of a View Object will be set at run time and the results of the query then displayed.
My BC4J components are located in one project while the coding for the data web bean is in another project. I used the following code bu t it does not work. Could you please let me know what I am doing wrong?
public void populateOSTable(int P_EmpId)
String m_whereString = "EmpView.EMP_ID = " + P_EmpId;
String m_OrderBy = "EmpView.EMP_NAME";
oracle.jbo.ApplicationModule appModule = null;
ViewObject vo = appModule.findApplicationModule("EMPBC.EMPAppModule").findViewObject("EMPBC.EMPView");
vo.setWhereClause(m_whereString);
vo.setOrderByClause(m_OrderBy);
vo.executeQuery();
vo.next();
String empName numAttrs = vo.getAttribute(EmpName);
System.out.println(empName);
Thanks.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JDev Team (Laura):
Here is how I have usually done mine:
1. In the JSP, use a RowsetNavigator bean to set the where clause and execute the query.
2. Use a custom web bean to process the results of the query (print to HTML).
for example:
<jsp:useBean class="oracle.jbo.html.databeans.RowsetNavigator" id="rsn" scope="request" >
<%
// get the parameter from the find form
String p = request.getParameter("p");
String s = request.getParameter("s");
// store the information for reference later
session.putValue("p", p);
session.putValue("s", s);
// initialize the app module and view object
rsn.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
// set the where clause string
String theclause = "presname = '" + p + "' AND slideno=" + s;
// set the where clause for the VO
rsn.getRowSet().getViewObject().setWhereClause(theclause);
rsn.getRowSet().getViewObject().executeQuery();
rsn.getRowSet().first();
%>
</jsp:useBean>
<jsp:useBean class="wt_bc.walkthruBean" id="wtb" scope="request" >
<%
// initialize the app module and VO
wtb.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
wtb.render();
%>
In this case, the render method of my custom web bean mostly gets some session variables, and prints various content depending on the session variable values.
Hope this helps.
</jsp:useBean><HR></BLOCKQUOTE>
Laura can you give the code of your walkthru bean? i wna't to initialize a viewobject, set the where clause and give that viewobject back to initialize my navigatorbar.
Nathalie
null

DECODE inside the WHERE clause

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