Does Oracle have a means to show query execution plans like Sybase 'showplan'? -

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i sybase dba/performance optimizer , asked performance of sql queries on oracle , see problems , why slow. there showplan similar sybase? need number of physical i/o's , logical i/o's, table scans , indexes query or stored procedure uses.

i used use embarcadero , don't have anymore.

explain plan and/or autotrace oracle equivalent give possible execution plan oracle use if execute query.

in sqlplus this..

sql> set autotrace traceonly;  sql> select * scott.emp;  14 rows selected.  execution plan ---------------------------------------------------------- plan hash value: 3956160932  -------------------------------------------------------------------------- | id  | operation         | name | rows  | bytes | cost (%cpu)| time     | -------------------------------------------------------------------------- |   0 | select statement  |      |    14 |   518 |     3   (0)| 00:00:01 | |   1 |  table access full| emp  |    14 |   518 |     3   (0)| 00:00:01 | --------------------------------------------------------------------------   statistics ----------------------------------------------------------           0  recursive calls           0  db block gets           8  consistent gets           0  physical reads           0  redo size        1415  bytes sent via sql*net client         381  bytes received via sql*net client           2  sql*net roundtrips to/from client           0  sorts (memory)           0  sorts (disk)          14  rows processed

here various other options available depending on level of detail , specific scenario..

http://www.oracle-base.com/articles/10g/sqltrace10046trcsessandtkprof10g.php


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