RE: High number of execution while using bind variables.

From: Nisha Mohan <NishaMohan_A_at_infosys.com>
Date: Thu, 19 Jul 2012 14:27:40 +0530
Message-ID: <3F2FEF77A7095A4D8D354F174B3535630DA24974EB_at_BLRKECMBX07.ad.infosys.com>

What does 'Rows' imply in explain plan??Does it mean that 79543 rows are being fetched by that query using index? Thanks and Regards,
Nisha Mohan.A

From: Niall Litchfield [mailto:niall.litchfield_at_gmail.com] Sent: Thursday, July 19, 2012 12:39 PM
To: Nisha Mohan
Cc: oracle-l_at_freelists.org
Subject: Re: High number of execution while using bind variables.

What do you mean by 'executions'? Normally that would mean how many times the calling program ran the statement - but that's nothing to do with the bind vars and everything to do with the calling code. On Jul 19, 2012 7:59 AM, "Nisha Mohan" <NishaMohan_A_at_infosys.com<mailto:NishaMohan_A_at_infosys.com>> wrote: Hi,
The below query is going for 79000 executions when bind variables are used. Select COUNT ( InID) From InD PPR BO95_PPR where IND.PPR = PPR. PPRName AND ( ( ( ( ( ( AGD = :1 ) AND ( AGUD is null ) ) AND ( MW is null ) ) AND ( ( ( Status = :2 ) OR ( Status = :3 ) ) ) ) AND BD = :4 ) )

Bind variable values are as follows

:1 = 10
:2 = Down
:3 = Run
:4 = 10

------------------------------------------------------------------------------------------------------
| Id  | Operation                     | Name                 | Rows  | Bytes | Cost (%CPU)| Time     |
------------------------------------------------------------------------------------------------------


|   0 | SELECT STATEMENT              |                      |     1 |    54 |    74   (3)| 00:00:01 |

|   1 |  SORT AGGREGATE               |                      |     1 |    54 |            |          |

|   2 |   NESTED LOOPS                |                      | 79543 |  4194K|    74   (3)| 00:00:01 |

|   3 |    TABLE ACCESS BY INDEX ROWID| PPR     |     1 |    15 |     1   (0)| 00:00:01 |

|*  4 |     INDEX RANGE SCAN          | IDX_PPR_BD     |     1 |       |     1   (0)| 00:00:01 |


|   5 |    INLIST ITERATOR            |                      |       |       |            |          |

|*  6 |     INDEX RANGE SCAN          | IDX_InD_ASABMP | 79543 |  3029K|    73   (3)| 00:00:01 |
------------------------------------------------------------------------------------------------------

When I replace the bind variables with hard coded values, the row returned is 29000 only.

Why is it different?

Thanks and Regards,
Nisha Mohan.A

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Received on Thu Jul 19 2012 - 03:57:40 CDT