diff options
Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/ref/copy.sgml | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/doc/src/sgml/ref/copy.sgml b/doc/src/sgml/ref/copy.sgml index 6a0fabc978d..2137c67cb4b 100644 --- a/doc/src/sgml/ref/copy.sgml +++ b/doc/src/sgml/ref/copy.sgml @@ -190,18 +190,14 @@ COPY { <replaceable class="parameter">table_name</replaceable> [ ( <replaceable would be after running the <command>VACUUM FREEZE</> command. This is intended as a performance option for initial data loading. Rows will be frozen only if the table being loaded has been created - in the current subtransaction, there are no cursors open and there - are no older snapshots held by this transaction. If those conditions - are not met the command will continue without error though will not - freeze rows. It is also possible in rare cases that the request - cannot be honoured for internal reasons, hence <literal>FREEZE</literal> - is more of a guideline than a hard rule. + or truncated in the current subtransaction, there are no cursors + open and there are no older snapshots held by this transaction. </para> <para> Note that all other sessions will immediately be able to see the data once it has been successfully loaded. This violates the normal rules - of MVCC visibility and by specifying this option the user acknowledges - explicitly that this is understood. + of MVCC visibility and users specifying should be aware of the + potential problems this might cause. </para> </listitem> </varlistentry> |