diff --git a/doc/src/sgml/ref/prepare.sgml b/doc/src/sgml/ref/prepare.sgml index 684b4bb8ba0aec5278250dc2ac4fc35c2704c8da..e7190b1b17e13535749a4fe7301b5992a15e4759 100644 --- a/doc/src/sgml/ref/prepare.sgml +++ b/doc/src/sgml/ref/prepare.sgml @@ -1,5 +1,5 @@ <!-- -$PostgreSQL: pgsql/doc/src/sgml/ref/prepare.sgml,v 1.9 2003/12/01 22:07:58 momjian Exp $ +$PostgreSQL: pgsql/doc/src/sgml/ref/prepare.sgml,v 1.10 2003/12/14 00:55:46 neilc Exp $ PostgreSQL documentation --> @@ -52,7 +52,7 @@ PREPARE <replaceable class="PARAMETER">plan_name</replaceable> [ (<replaceable c </para> <para> - Prepared statements are only for the duration of the current + Prepared statements only last for the duration of the current database session. When the session ends, the prepared statement is forgotten, so it must be recreated before being used again. This also means that a single prepared statement cannot be used by @@ -115,12 +115,12 @@ PREPARE <replaceable class="PARAMETER">plan_name</replaceable> [ (<replaceable c <title>Notes</title> <para> - In some situations, the query plan produced by for a prepared - statement may be inferior to the plan produced if the statement - were submitted and executed normally. This is because when the - statement is planned and the planner attempts to determine the - optimal query plan, the actual values of any parameters specified - in the statement are + In some situations, the query plan produced for a prepared + statement will be inferior to the query plan that would have been + chosen if the statement had been submitted and executed + normally. This is because when the statement is planned and the + planner attempts to determine the optimal query plan, the actual + values of any parameters specified in the statement are unavailable. <productname>PostgreSQL</productname> collects statistics on the distribution of data in the table, and can use constant values in a statement to make guesses about the likely