Order of evaluation of analytic function

Hello

have question quite like this:

with

-This query selects a 'representative' acct_id by Group (about 300 lines in total)

acct_repres as

(

Select distinct acct_id, origin_id, acct_parm_id of

(

Select a.*

source_id

, dense_rank() over (partition by order source_id by nulls first, acct_id acct_nbr origin_id) as odr

account a join account_parm on (a.parm_id = ap.acct_parm_id) ap

)

where odr = 1

)

Select col1

col2

, (select accct_id from ar acct_repres where ar.acct_parm_id = t2.acct_parm_id) col3

, col4 (select count (1) of acct_repres)

of une_table t1

Join other_table t2 on (...)

And here it is. "Acct_repres" subquery returns more than 300 lines when it is run separately. But when it is used in CTE sometimes (depending on the execution plan) she seems to have that one line - the value in the column col4 is '1 ',.

While the value of col3 is NULL for most of the cases.

It looks like the the dense_rank function and the State 'where odr = 1' are evaluated at the end.

When I use the hint to MATERIALIZE the result was the same.

But when I put the result of account_repres in the dedicated table and use this table instead of CTE output is correct.

What is a bug? Or I do something wrong?

PS: my version of db is 11 GR 1 material (11.1.0.7).

some unorganized comments:

-analytical functions are evaluated towards the end of the execution ("' the last set of operations performed in a query with the exception of the final ORDER BY clause"- http://docs.oracle.com/cd/E11882_01/server.112/e26088/functions004.htm")

-but still the result of a SQL query must be deterministic, so I think that your results are not an expected behavior

-the CBO has some problems with common table expressions (http://jonathanlewis.wordpress.com/2012/05/24/subquery-factoring-7/) if they are of great assistance in the structuring of complex queries. In these cases, you can avoid problems by using inline views

-Your query uses the common table expressions in scalar subqueries and scalar subqueries are also likely to confuse the CBO. In addition, they are executed once for each row in your result set (or at least for each different correlation value) and can have a negative impact on the performance of the queries in many cases. Often, they can be replaced by outer joins.

-you say that the suspicion of materialization brings you an erroneous result: the indicator object (online) gives you the correct results?

Concerning

Martin Preiss

Tags: Database

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INSERT INTO myenterprise(city, storeid, month_name, total_sales)
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INSERT INTO myenterprise(city, storeid, month_name, total_sales)
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INSERT INTO myenterprise(city, storeid, month_name, total_sales)
  VALUES ('london', 'id5', 'September', 500);
INSERT INTO myenterprise(city, storeid, month_name, total_sales)
  VALUES ('london', 'id5', 'November', 1000);
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  3  FROM myenterprise
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CITY       TOTAL_SALES_PER_CITY
---------- --------------------
london                    10500
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    2 small Germany class G

    I've tested this in Oracle 11, but it should work in Oracle 7.

    If this isn't the case, you may need to create a view.

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    Exclude_flag = E (exclude): for b.fs = 433638, b.na = 80000. I have 2 lines in the table for this fs.  Both have E exclude_flag (exclude).  I want to go on all the lines in this FS in the table in a query and I return only one row in the result, if and only if b.na falls out of scope of a.na_min_value and a.na_max_values.  In this example, it falls outside the range excluded for both lines (first two lines of the table a).

    Similarly, exclude_flag = I (Include). for b.fs = 432828, b.na = 17200. I have 2 lines in the table for this fs.  Both have an exclude_flag of I (include).  I want to go on all the lines in this FS in the table in a query and I return only one row in the result, if and only if b.na is between a.na_min_value and a.na_max_values.  In this example, it falls in the range of both the range include for the two lines (line 6 and 7 of the table a).

    The following query gives me two lines for each b.fs.  It is possible to get what I'm looking for simply using sql (possibly write the analytical function?) or I have to write the pl/sql routine for this?

    WITH rates_table

    Did YOU (select ' E' include_exclude_flag, "81000 ' na_min_value, na_max_value '81999', '433638' FS, 0.8 of double rate

    UNION

    Select 'E' include_exclude_flag, na_min_value '84000', na_max_value '84999', '433638' FS, 0.8 of double rate

    UNION

    Select 'I' include_exclude_flag, na_min_value '12000', na_max_value '12999', '432828' FS, rate 0.25 double

    UNION

    Select 'I' include_exclude_flag, na_min_value '13000', na_max_value '13999', '432828' FS, rate 0.25 double

    UNION

    Select 'I' include_exclude_flag, na_min_value '15000', na_max_value '15000', '432828' FS, rate 0.25 double

    UNION

    Select 'I' include_exclude_flag, na_min_value '16100', na_max_value '18000', '432828' FS, rate 0.25 double

    UNION

    Select 'I' include_exclude_flag, '17100' na_min_value, na_max_value '18000', '432828' FS, rate 0.25 double

    UNION

    Select 'I' include_exclude_flag, na_min_value '02440', na_max_value '02470', '016532' FS, 0.35 rate double

    UNION

    Select 'E' include_exclude_flag, na_min_value ' 21000 ', '21000' na_max_value, ' 200020' FS, 0.35 double rate).

    transaction_table AS

    (select '433638' FS '80000' NA, 300 double amt)

    Union

    Select '432828' FS '17200' NA, amt 500 double

    )

    Select * from rates_table a, transaction_table b

    where 1 = 1

    and ((b.na PAS entre a.na_min_value et a.na_max_value et a.include_exclude_flag = «E») GOLD ())

    b.na between a.na_min_value and a.na_max_value and a.include_exclude_flag = 'I'))

    and b.fs = a.fs

    ;

    Any help is greatly appreciated.  I use oracle 11i

    @OP,

    For this kind of problems, we get the number of rows that satisfy the required conditions or who do not meet the required conditions. And then eliminate the line that should be eliminated.

    As below, I calculate four counts (number of join lines)

    EOBCNT - excluded and Out of Bound

    EIBCNT - excluded and in the limit

    IOBCNT - included and Out of Bound

    IIBCNT - included and within the limits

    Once those are calculated, simply return the lines that have EIBCNT and IOBCNT are zero.

    For Ex:

    > WITH

    rates_table

    AS LONG AS)

    Select 'E' include_exclude_flag, na_min_value '79999', na_max_value '79999', '433638' FS, 0.8 double UNION rates

    -Select 'E' include_exclude_flag, na_min_value ' 79999', na_max_value '80000', '433638' FS, 0.8 double UNION rate - TEST - THE

    -If you uncomment the last line and then 433638 will not be returned

    Select 'E' include_exclude_flag, "81000 ' na_min_value, na_max_value '81999', '433638' FS, 0.8 double UNION rates

    Select 'E' include_exclude_flag, na_min_value '84000', na_max_value '84999', '433638' FS, 0.8 double UNION rates

    Select 'I' include_exclude_flag, na_min_value '12000', na_max_value '12999', '432828' FS, 0.25 rate double UNION

    Select 'I' include_exclude_flag, na_min_value '13000', na_max_value '13999', '432828' FS, 0.25 rate double UNION

    Select 'I' include_exclude_flag, na_min_value '15000', na_max_value '15000', '432828' FS, 0.25 rate double UNION

    Select 'I' include_exclude_flag, na_min_value '16100', na_max_value '18000', '432828' FS, 0.25 rate double UNION

    Select 'I' include_exclude_flag, '17100' na_min_value, na_max_value '18000', '432828' FS, 0.25 rate double UNION

    Select 'I' include_exclude_flag, na_min_value '02440', na_max_value '02470', '016532' FS, 0.35 rate double UNION

    Select 'E' include_exclude_flag, na_min_value ' 21000 ', '21000' na_max_value, ' 200020' FS, 0.35 double rate).

    transaction_table AS

    (select '433638' FS '80000' NA, amt 300 Union double

    Select '432828' FS '17200' NA, amt 500 double

    )

    getcnts as)

    SELECT a.*

    b.na, b.amt

    , sum (case when (b.na NOT BETWEEN a.na_min_value)

    AND a.na_max_value

    AND a.include_exclude_flag = 'E '.

    end) then 1 else 0) on (a.fs partition) Eobcnt

    , sum (case when (b.na NOT BETWEEN a.na_min_value)

    AND a.na_max_value

    AND a.include_exclude_flag = 'I '.

    end) then 1 else 0) on (a.fs partition) Iobcnt

    , sum (case when (b.na BETWEEN a.na_min_value)

    AND a.na_max_value

    AND a.include_exclude_flag = 'E '.

    end) then 1 else 0) on (a.fs partition) Eibcnt

    , sum (case when (b.na BETWEEN a.na_min_value)

    AND a.na_max_value

    AND a.include_exclude_flag = 'I '.

    end) then 1 else 0) on (a.fs partition) Iibcnt

    OF rates_table one

    transaction_table b

    WHERE b.fs = a.fs

    )

    getrows as)

    Select x.*, row_number() on

    (partition by order of fs with null desc) getcnts rn x

    where IOBCNT = 0 and eibcnt = 0 - remove lines that are not needed (IF and ONLY if)

    )

    Select * from getrows

    where rn = 1 - to limit a SINGLE row (arbitrarily)

    INCLUDE_EXCLUDE_FLAG NA_MIN_VALUE NA_MAX_VALUE FS RATE NA AMT EOBCNT IOBCNT EIBCNT IIBCNT RN

    -------------------- ------------ ------------ ------ ---------- ----- ---------- ---------- ---------- ---------- ---------- ----------

    433638 84999 84000.8 E 80000 300 3 0 0 0 1

    I hope this helps.

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SQL>

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