diff options
| -rw-r--r-- | doc/src/sgml/ref/alter_table.sgml | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/doc/src/sgml/ref/alter_table.sgml b/doc/src/sgml/ref/alter_table.sgml index 75de2262539..7829f378bba 100644 --- a/doc/src/sgml/ref/alter_table.sgml +++ b/doc/src/sgml/ref/alter_table.sgml @@ -175,9 +175,14 @@ ALTER TABLE [ IF EXISTS ] <replaceable class="PARAMETER">name</replaceable> </para> <para> - If this table is a partition, one cannot perform <literal>DROP NOT NULL</> + If this table is a partition, one cannot perform <literal>DROP NOT NULL</literal> on a column if it is marked <literal>NOT NULL</literal> in the parent - table. + table. To drop the <literal>NOT NULL</literal> constraint from all the + partitions, perform <literal>DROP NOT NULL</literal> on the parent + table. Even if there is no <literal>NOT NULL</> constraint on the + parent, such a constraint can still be added to individual partitions, + if desired; that is, the children can disallow nulls even if the parent + allows them, but not the other way around. </para> </listitem> </varlistentry> |