Comments on: Scalar Subqueries http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/ Just another Oracle weblog Mon, 20 May 2013 17:10:14 +0000 hourly 1 http://wordpress.com/ By: Scalar Subselect Cost Accounting « OraStory http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/#comment-44232 Mon, 09 Jan 2012 10:19:38 +0000 http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/#comment-44232 [...] Also see: http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/ [...]

]]> By: Cardinality feedback « Oracle Scratchpad http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/#comment-32957 Mon, 11 May 2009 19:32:39 +0000 http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/#comment-32957 [...] a very large partitioned table in that view, and you might notice it is referenced twice: once as a scalar subquery in the from clause – where a couple of “)” have turned into “|” [...]

]]> By: Andras Gabor http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/#comment-22573 Tue, 16 Oct 2007 06:22:38 +0000 http://jonathanlewis.wordpress.com/2007/10/12/scalar-subqueries/#comment-22573 Hi,

As far as I remember this is different in different Oracle versions. Before 9i these scalar subqueries were not shown in the plan at all. In 9i they are shown in the explain plan but are not visible in the v$sql_plan (I don’t remember of v$sql_plan_statistics_all). In 10g it is shown everywhere correctly. However, this should be rechecked, but right now I only have access to some 10g systems. (similarly temp table transformation steps were not shown correctly in 9i, but are nice in 10g)

Also, If you have more subqueries in the select list they are listed after each other and the main query is the last child.

Sorry for not being 100 pct sure though…

]]>