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docs: mention CREATE TABLE LIKE linkage using INCLUDING DEFAULTS

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Mention that CREATE TABLE LIKE INCLUDING DEFAULTS creates a link between
the original and new tables if a default function modifies the database,
like nextval().
This commit is contained in:
Bruce Momjian 2014-01-25 14:32:48 -05:00
parent 71c6a8e375
commit e2989fcab6
1 changed files with 4 additions and 1 deletions
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5
doc/src/sgml/ref/create_table.sgml
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@ -329,7 +329,10 @@ CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE [ IF NOT EXI
</para>
<para>
Default expressions for the copied column definitions will only be
copied if <literal>INCLUDING DEFAULTS</literal> is specified. The
copied if <literal>INCLUDING DEFAULTS</literal> is specified.
Defaults that call database-modification functions, like
<function>nextval</>, create a linkage between the original and
new tables. The
default behavior is to exclude default expressions, resulting in the
copied columns in the new table having null defaults.
</para>