>SQL> explain plan for select count(*) from tablo;
On version up to and including 9i, use the utlxplan.sql script to createthe plan table as instructed below.
On 10g and above there is a new script – catplan.sql – to create the plan
table that creates a public plan table as a global temporary table
accessible from any schema.
Note that the plan table format can change between versions so ensure
that it is created using the utlxplan script from the current version.