- table. Otherwise, the planner may make poor choices of query plans.
+ tables, it is advisable to run
+ endterm="sql-analyze-title"> on the newly clustered table.
+ Otherwise, the planner may make poor choices of query plans.
- Cluster the employees relation using the same
+ Cluster the employees table using the same
index that was used before:
CLUSTER emp;
- TRUNCATE> will not run any user-defined ON DELETE triggers
- that might exist for the table.
+ TRUNCATE> will not run any user-defined ON
+ DELETE triggers that might exist for the table.
- <command>FREEZE> is a special-purpose option that
+ <literal>FREEZE> is a special-purpose option that
causes tuples to be marked frozen
as soon as possible,
rather than waiting until they are quite old. If this is done when there
are no other open transactions in the same database, then it is guaranteed
that all tuples in the database are frozen> and will not be
subject to transaction ID wraparound problems, no matter how long the
database is left unvacuumed.
- <command>FREEZE> is not recommended for routine use. Its only
+ <literal>FREEZE> is not recommended for routine use. Its only
intended usage is in connection with preparation of user-defined template
databases, or other databases that are completely read-only and will not
receive routine maintenance VACUUM> operations.