diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/release.sgml | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/doc/src/sgml/release.sgml b/doc/src/sgml/release.sgml index 91439c17f1e..afd5f8ffb3f 100644 --- a/doc/src/sgml/release.sgml +++ b/doc/src/sgml/release.sgml @@ -1,5 +1,5 @@ <!-- -$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.218 2003/10/27 02:51:39 momjian Exp $ +$Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.219 2003/10/29 20:38:19 momjian Exp $ --> <appendix id="release"> @@ -15,6 +15,15 @@ $Header: /cvsroot/pgsql/doc/src/sgml/release.sgml,v 1.218 2003/10/27 02:51:39 mo <glossentry><glossterm> Performance</glossterm> <glossdef><para> IN/NOT IN subqueries are now much more efficient + <footnote> + <para> + In previous releases, IN/NOT IN subqueries were joined to the + upper query by sequentially scanning the subquery looking for + a join. The 7.4 code uses the same sophisticated techniques + used by ordinary joins and so is much faster, and is now faster + than EXISTS subqueries. + </para> + </footnote> </para> <para> Improved GROUP BY processing by using hash buckets</para> |