diff options
Diffstat (limited to 'doc/src/sgml')
| -rw-r--r-- | doc/src/sgml/ref/alter_sequence.sgml | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/doc/src/sgml/ref/alter_sequence.sgml b/doc/src/sgml/ref/alter_sequence.sgml index 252a668189b..5c912ab892d 100644 --- a/doc/src/sgml/ref/alter_sequence.sgml +++ b/doc/src/sgml/ref/alter_sequence.sgml @@ -94,10 +94,15 @@ ALTER SEQUENCE [ IF EXISTS ] <replaceable class="parameter">name</replaceable> S </para> <para> - Note that changing the data type does not automatically change the - minimum and maximum values. You can use the clauses <literal>NO - MINVALUE</literal> and <literal>NO MAXVALUE</literal> to adjust the - minimum and maximum values to the range of the new data type. + Changing the data type automatically changes the minimum and maximum + values of the sequence if and only if the previous minimum and maximum + values were the minimum or maximum value of the old data type (in + other words, if the sequence had been created using <literal>NO + MINVALUE</literal> or <literal>NO MAXVALUE</literal>, implicitly or + explicitly). Otherwise, the minimum and maximum values are preserved, + unless new values are given as part of the same command. If the + minimum and maximum values do not fit into the new data type, an error + will be generated. </para> </listitem> </varlistentry> |