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Diffstat (limited to 'doc/src')
| -rw-r--r-- | doc/src/sgml/ddl.sgml | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml index aae5d320309..bdfb221bc98 100644 --- a/doc/src/sgml/ddl.sgml +++ b/doc/src/sgml/ddl.sgml @@ -324,6 +324,32 @@ CREATE TABLE people ( linkend="sql-createforeigntable"/> for details. </para> </listitem> + <listitem> + <para>For inheritance:</para> + <itemizedlist> + <listitem> + <para> + If a parent column is a generated column, a child column must also be + a generated column using the same expression. In the definition of + the child column, leave off the <literal>GENERATED</literal> clause, + as it will be copied from the parent. + </para> + </listitem> + <listitem> + <para> + In case of multiple inheritance, if one parent column is a generated + column, then all parent columns must be generated columns and with the + same expression. + </para> + </listitem> + <listitem> + <para> + If a parent column is not a generated column, a child column may be + defined to be a generated column or not. + </para> + </listitem> + </itemizedlist> + </listitem> </itemizedlist> </para> |