Using a WHERE clause in APEX Tree

Hi All -
I have an hierarchical SQL query that I'm displaying as an APEX tree.
My sample app is here:
https://apex.oracle.com/pls/apex/f?p=32581:29
login: guest
pw: app_1000
workspace: leppard
I am trying to add a WHERE clause so that only nodes with the lowest level children are displayed, i.e. something like 'WHERE connect_by_isleaf = 0 OR level = 5'
The tree query with the where clause works fine in the SQL commands window, but when I add the WHERE clause to my apex tree the page no longer displays anything. Is this an issue with APEX or is there some other way to filter my results?
Thanks in advance for any suggestions,
john

Connect by occurs first, the where clause then is applied to those results, effectively cutting away in the hierarchical structure. Since apex has to build a hierarchical structure from the query it relies on the level pseudocolumn, which is butchered by applying the where clause. It's a miracle you aren't even receiving errors because I'd almost expect an incorrect json array to have been built. With no top level to start from and only level 5 or leaf nodes there is no structure to present: both apex can not put out a correct representation and not jstree either. In your query you will see your "root nodes" but it is not representable.
I'm not sure why you want to present this in a tree? Both connect_by_is_leaf and level = 5 will simply give you a list of nodes without any hierarchical structure.
The better thing to do is to use a subquery to first limit your dataset and then use that to base the tree query on, that way you don't break any of those vital columns.
Eg if you only want leaf nodes and their immediate parent you could go for something like this (quick mockup on some testdata):
with dataset as (
select node_id, parent_id
from treedata
where connect_by_isleaf = 0
connect by prior node_id = parent_id
start with parent_id = 0
dataset2 as (
select node_id, parent_id
from dataset
union all
select node_id, null parent_id
from treedata
where node_id in (select parent_id from dataset)
select level, node_id
from dataset2
connect by prior node_id = parent_id
start with parent_id is null

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What happens u0093Updateu0094 command is used without where clause ?

Hi
What happens Update command is used without where clause ?
thank you

Hi subash,
chk this help
UPDATE dbtab SET f1 ... fn. or
UPDATE (dbtabname) SET f1 ... fn.
Extras:
1. ... WHERE condition
2. ... CLIENT SPECIFIED
3. ... CONNECTION con
Effect
Updates values in a database table. <b>If there is no WHERE clause, all lines (in the current client) are updated.</b> If a WHERE condition is specified, only thoserecords which satisfy the WHERE condition are updated.

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hi,
I have a report and I need to use a where clause that is archived in a table, it is a different one depending on the row (colour=blue or number = 88..) I have tryied with ref cursor, dinamis sql, functions, packages and could not get it, any suggestion??
thanks

You may use Lexical Rerefences: "Lexical references are placeholders for text that you embed in a SELECT statement. You can use lexical references to replace the clauses appearing after SELECT, FROM, WHERE, GROUP BY, ORDER BY, HAVING, CONNECT BY, and START WITH....."

Tree issue using a where clause

Tree created
select "ID" id,
"PARENT_ID" pid,
"TITLE" name,
"LINK" link,
null a1,
null a2
from apexim.TREE_NAV
I am attempting to alter this tree this way
select "ID" id,
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null a1,
null a2
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this throw the error
Warning: Tree root ID "1" not found.
When I change the where clause to:
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I have tried several things and am at wits end.

rbackmann wrote:
And the page_id_1 is a field in the table (SORRY EXAMPLE BAD NAMING CONVENTIONS) that IS VARCHAR
and houses a comma seperated list of page numbers ie 28,29, 30Okay, I was wrong about the field name :(
Carefully examine the query, expecially the INSTR line. Get the values in both the column and the bind variable and make sure they are what you think they are.
The example on the other post might have failed because you were equality comparing the column value to '28' when it might have been a csv with commas unless you changed it (something worth trying).
On 4th look I may (or may not) have something. PAGE_ID_1 is a VARCHAR2, while the 28 you compared it to was a number. Its a long shot, but maybe SQL is trying to convert the csv field to a number, failing to raise an error message where you can find it, and failing for that reason. Try using '28' on the equality test.
Edited by: riedelme on May 8, 2009 6:03 AM

Conditional WHERE clause for APEX

Dear SQL gurus,
I know that there's a APEX forum, but I think that there maybe an sql based solution for this...
What I have is a query like this:
SELECT COMMENT_ORIG, COMMENT_CHARGING
FROM CL_INVENTORY_OPEN_OUT
WHERE INCIDENTAL_FK=:P13_INCIDENTAL_FK where :P13_INCIDENTAL_FK is a field in the Web Based GUI...
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WHERE
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Best Regards and THX
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FROM CL_INVENTORY_OPEN_OUT
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CASE :P13_INCIDENTAL_FK
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END CASE;
END;Edited by: ajallen on May 7, 2010 6:44 AM

Function use in where clause

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clause
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select * from abc_table where clause
more strictly
select * from abc_table where (select node(condition1) clause from dual)
which is interpreted as
select * from abc_table where occupation='SALARY'
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I tried CURSOR but not workd for this
Thanks in advance,
Rup

I cant really understand your problem
--fn1 is a function
sql>
select fn1
from dual;
FN1
CLERK
sql>
select * from emp
where job = fn1;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7369 SMITH CLERK 7902 17-DEC-80 800     20
7876 ADAMS CLERK 7788 23-MAY-87 1100     20
7900 JAMES CLERK 7698 03-DEC-81 950     30
7934 MILLER CLERK 7782 23-JAN-82 1300     10
Message was edited by:
        jeneesh

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

Partition Pruning on Interval Range Partitioned Table not happening when SYSDATE used in Where Clause

We have tables that are interval range partitioned on a DATE column, with a partition for each day - all very standard and straight out of Oracle doc.
A 3rd party application queries the tables to find number of rows based on date range that is on the column used for the partition key.
This application uses date range specified relative to current date - i.e. for last two days would be "..startdate > SYSDATE -2 " - but partition pruning does not take place and the explain plan shows that every partition is included.
By presenting the query using the date in a variable partition pruning does table place, and query obviously performs much better.
DB is 11.2.0.3 on RHEL6, and default parameters set - i.e. nothing changed that would influence optimizer behavior to something unusual.
I can't work out why this would be so. It very easy to reproduce with simple test case below.
I'd be very interested to hear any thoughts on why it is this way and whether anything can be done to permit the partition pruning to work with a query including SYSDATE as it would be difficult to get the application code changed.
Furthermore to make a case to change the code I would need an explanation of why querying using SYSDATE is not good practice, and I don't know of any such information.
1) Create simple partitioned table
CREATETABLE part_test
   (id                      NUMBER NOT NULL,
    starttime               DATE NOT NULL,
    CONSTRAINT pk_part_test PRIMARY KEY (id))
PARTITION BY RANGE (starttime) INTERVAL (NUMTODSINTERVAL(1,'day')) (PARTITION p0 VALUES LESS THAN (TO_DATE('01-01-2013','DD-MM-YYYY')));
2) Populate table 1million rows spread between 10 partitions
BEGIN
    FOR i IN 1..1000000
    LOOP
        INSERT INTO part_test (id, starttime) VALUES (i, SYSDATE - DBMS_RANDOM.value(low => 1, high => 10));
    END LOOP;
END;
EXEC dbms_stats.gather_table_stats('SUPER_CONF','PART_TEST');
3) Query the Table for data from last 2 days using SYSDATE in clause
EXPLAIN PLAN FOR
SELECT count(*)
FROM    part_test
WHERE   starttime >= SYSDATE - 2;
| Id | Operation                 | Name      | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT          |           |     1 |     8 | 7895 (1)| 00:00:01 |       |       |
|   1 | SORT AGGREGATE           |           |     1 |     8 |            |          |       |       |
|   2 |   PARTITION RANGE ITERATOR|           |   111K|   867K| 7895   (1)| 00:00:01 |   KEY |1048575|
|* 3 |    TABLE ACCESS FULL      | PART_TEST |   111K|   867K| 7895   (1)| 00:00:01 |   KEY |1048575|
Predicate Information (identified by operation id):
   3 - filter("STARTTIME">=SYSDATE@!-2)
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This query returns the same answer but very different cost.
EXPLAIN PLAN FOR
SELECT count(*)
FROM part_test
WHERE starttime >= (to_date('23122013:0950','DDMMYYYY:HH24MI'))-2;
| Id | Operation                 | Name      | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT          |           |     1 |     8 |   131 (0)| 00:00:01 |       |       |
|   1 | SORT AGGREGATE           |           |     1 |     8 |            |          |       |       |
|   2 |   PARTITION RANGE ITERATOR|           |   111K|   867K|   131   (0)| 00:00:01 |   356 |1048575|
|* 3 |    TABLE ACCESS FULL      | PART_TEST |   111K|   867K|   131   (0)| 00:00:01 |   356 |1048575|
Predicate Information (identified by operation id):
   3 - filter("STARTTIME">=TO_DATE(' 2013-12-21 09:50:00', 'syyyy-mm-dd hh24:mi:ss'))
thanks in anticipation
Jim

As Jonathan has already pointed out there are situations where the CBO knows that partition pruning will occur but is unable to identify those partitions at parse time. The CBO will then use a dynamic pruning which means determine the partitions to eliminate dynamically at run time. This is why you see the KEY information instead of a known partition number. This is to occur mainly when you compare a function to your partition key i.e. where partition_key = function. And SYSDATE is a function. For the other bizarre PSTOP number (1048575) see this blog
http://hourim.wordpress.com/2013/11/08/interval-partitioning-and-pstop-in-execution-plan/
Best regards
Mohamed Houri

Can pipelined functions' return values be used in WHERE clause?

If I have function MY_FUNC that returns a REFCURSOR with columns COL1, COL2, COL3
can I use the values returned in the output cursor in my WHERE clause as well as in the SELECT clause?
e.g.
SELECT COL1, COL2, COL3
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Hi,
SQL> Create OR Replace Package Pkg_Test_ Is
2
3     Type my_typ Is Table Of Number;
4
5     Function fnc_test Return my_typ Pipelined;
6
7 End;
8 /
Package created
SQL> Create OR Replace Package Body Pkg_Test_ Is
2
3     Function fnc_test Return my_typ
4        Pipelined Is
5        va_typ my_typ := my_typ();
6     Begin
7        For i IN 1 .. 10 Loop
8           va_typ.Extend;
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12        Return;
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14
15 End;
16 /
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2    FROM Table(PKG_TEST_.FNC_TEST)
3   WHERE COLUMN_VALUE > 5
4 /
COLUMN_VALUE
           6
           7
           8
           9
          10Regards,
Christian Balz

REP 300 error when using dynamic where clause

Hi,
I am developing a report and I need a dynamic where clause.The code I have written in the where clause is as below
function where_clauseFormula return VARCHAR2 is
begin
if :P_PO_REQD = 'No' then
return ('and pha.segment1 is null');
elsif :P_PO_REQD = 'Yes' then
return('and pha.segment1 between NVL(:p_po_num_from,1) and NVL(:p_po_num_to,99999999999999999)');
else return NULL;
end if;
end;
Now if i directly use either of the conditions in my report query it works fine.But if the parameter is No then the where clause does not work.I have also tried different statements in the if clause of the 'No' part and they work.For example the following code works when :P_PO_REQD is 'No' :
function where_clauseFormula return VARCHAR2 is
begin
if :P_PO_REQD = 'No' then
return ('and pha.segment1 between NVL(:p_po_num_from,1) and NVL(:p_po_num_to,99999999999999999)');
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end;
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Thanks
Mukund

You may use Lexical Reference for the dynamic where. In After Parameter Form Trigger, code....
if :P_PO_REQD = 'No' then
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elsif :P_PO_REQD = 'Yes' then
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end if;
..........

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i do have multiple records with status approval as "pend"....
Try the below:
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Pleaseeeeeeeeeeeee help me as soon as possible..................
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Sir,
Other than you are using postgres and a servlet I have absolutley no idea what you are on about.
Please try explaining in a less distressing manner.
Sincerely,
Slappy

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I build a tree struncture without where clause , it is fine, but When I tried to add a where clause, I get error, (Warning: Tree root ID "1" not found. ). Does anybody know why?
Here is my SQL
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"PID" pid,
"NAME" name,
"LINK" link
from CAPACITY_TREE
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Hi,
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