Hi Cherie,
Looks like parallel query kicked in. It usually throws some odd looking stuff in the explain plan.
HTH
Lisa
-----Original Message-----
From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
Sent: Monday, August 27, 2001 3:11 PM
To: Multiple recipients of list ORACLE-L
Subject:
I am running tkprof and explain plan on the following SQL statement:
SELECT DISTINCT CNFR_NO,
SPLT_PAY_TYPE, ACH_AMT
FROM whse_dbo.ACH_TRAN
WHERE ACCT_NO = '46807' AND
TRUNC(TRAN_DT) = TRUNC(TO_DATE('20-JUL-01','DD-MON-YY')) AND
STATUS = '2' AND
CNFR_NO >0 AND
(SPLT_PAY_TYPE = '810' OR
SPLT_PAY_TYPE = '820' );
I'm not really looking for advice on tuning this query but rather just
wanted to have some general questions answered regarding the
results i got using tkprof.
This is the first time I've ever run tkprof on a statement and gotten
an explain plan with :Q in it (followed by numbers). What does the
:Q mean?
Also, there is not hint embedded in the select statement I ran but
the explain plan output shows hints in the explain plan. Or at least
the explain plan list the output in hint format. Why is it doing that,
when there were no hints in the original source?
Thanks in advance,
Cherie Machler
Oracle DBA
Gelco Information Network
Trace file: /orasoft/oracle/admin/DWPRD02/udump/dwprd02_ora_1787.trc
Sort options: fchcpu
********************************************************************************
count = number of times OCI procedure was executed
cpu = cpu time in seconds executing
elapsed = elapsed time in seconds executing
disk = number of physical reads of buffers from disk
query = number of buffers gotten for consistent read
current = number of buffers gotten in current mode (usually for update)
rows = number of rows processed by the fetch or execute call
********************************************************************************
SELECT DISTINCT CNFR_NO,
SPLT_PAY_TYPE, ACH_AMT
FROM whse_dbo.ACH_TRAN
WHERE ACCT_NO = '46807' AND
TRUNC(TRAN_DT) = TRUNC(TO_DATE('20-JUL-01','DD-MON-YY')) AND
STATUS = '2' AND
CNFR_NO >0 AND
(SPLT_PAY_TYPE = '810' OR
SPLT_PAY_TYPE = '820' )
call count cpu elapsed disk query current
rows
------- ------ -------- ---------- ---------- ---------- ----------
----------
Parse 1 0.02 0.02 0 0 0
0
Execute 1 0.03 1.10 0 0 42
0
Fetch 30 0.01 1.40 0 0 0
421
------- ------ -------- ---------- ---------- ---------- ----------
----------
total 32 0.06 2.52 0 0 42
421
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 1985 (WHSE_DBO)
Rows Execution Plan
------- ---------------------------------------------------
0 SELECT STATEMENT GOAL: CHOOSE
0 SORT (UNIQUE) [:Q5497001]
SELECT DISTINCT C0,C1,C2 FROM :Q5497000
0 PARTITION (CONCATENATED) [:Q5497001]
0 INLIST ITERATOR (CONCATENATED) [:Q5497001]
0 TABLE ACCESS GOAL: ANALYZED (BY LOCAL INDEX ROWID) OF
'ACH_TRAN' [:Q5497000]
SELECT /*+ INDEX(A1 "ACH_TRAN_IDX4") */ A1."CNFR_NO" C0,
A1."SPLT_PAY_TYPE" C1,A1."ACH_AMT" C2 FROM
"WHSE_DBO"."ACH_TRAN" PARTITION(:B1) A1 WHERE
(A1."SPLT_PAY_TYPE"='810' OR A1."SPLT_PAY_TYPE"='820') AND
A1."STATUS"='2' AND A1."ACCT_NO"=46807 AND
TRUNC(A1."TRAN_DT")=TRUNC(TO_DATE('20-JUL-01','DD-MON-YY'))
AND A1."CNFR_NO">0
0 INDEX GOAL: ANALYZED (RANGE SCAN) OF 'ACH_TRAN_IDX4'
(NON-UNIQUE) [:Q5497000]
********************************************************************************
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