Oracle-L: RE: Why Multiple Parses in Trace ?

From: Cary Millsap <cary.millsap_at_hotsos.com>
Date: Mon, 22 Jul 2002 08:58:32 -0800
Message-ID: <F001.0049DEE0.20020722085832@fatcity.com>

...Because the application requested two parse calls for this statement from the server. The first one was a hard parse (server had never seen the statement before), and the second one was a parse call that did not result in a hard parse.

Cary Millsap
Hotsos Enterprises, Ltd.
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-----Original Message-----
VIVEK_SHARMA
Sent: Monday, July 22, 2002 8:03 AM
To: Multiple recipients of list ORACLE-L

Qs Why is Parse = 2 in the following Query ?

Solaris 8
Oracle 8.1.7
SGA = 60 MB
shared_pool_size = 30 MB

select mesg, lchg_user_id, TO_CHAR(lchg_time,'DD-MM-YYYY HH24:MI:SS'),   rcre_user_id, TO_CHAR(rcre_time,'DD-MM-YYYY HH24:MI:SS'), tran_id,   TO_CHAR(tran_date,'DD-MM-YYYY HH24:MI:SS'), NVL(ts_cnt,0), sol_id,   contra_acid, tran_amt||'!'||tran_crncy_code, TO_CHAR(value_date,'DD-MM-YYYY
  HH24:MI:SS'), tran_crncy_code, central_or_local_code, req_advc_ind,   sys_gen_flg, rowid
FROM
TBA_REF_TRN_TBL WHERE cmd = :1 AND cust_or_card_id = :2 AND   system_date_time = TO_DATE( :3 ,'DD-MM-YYYY HH24:MI:SS') AND dcc_id = :4

AND sno = :5

call count cpu elapsed disk query current rows
------- ------ -------- ---------- ---------- ---------- ----------

Parse 2 0.06 0.07 1 0 1 0
Execute 2 0.00 0.00 0 0 0 0
Fetch 2 0.00 0.02 3 6 0 0
------- ------ -------- ---------- ---------- ---------- ----------

total 6 0.06 0.09 4 6 1 0

Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 40 (TBAGEN)

Rows Row Source Operation

-------  ---------------------------------------------------
      0  TABLE ACCESS BY INDEX ROWID REF_TRN_TBL
      1   INDEX UNIQUE SCAN (object id 6561)



Rows     Execution Plan
-------  ---------------------------------------------------
      0  SELECT STATEMENT   GOAL: CHOOSE
      0   TABLE ACCESS (BY INDEX ROWID) OF 'REF_TRN_TBL'
      1    INDEX (UNIQUE SCAN) OF 'IDX_REF_TRN_TBL' (UNIQUE)

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Author: Cary Millsap
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Received on Mon Jul 22 2002 - 11:58:32 CDT