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docs: mention CREATE TABLE LIKE linkage using INCLUDING DEFAULTS

2014年1月25日 19:32:48 +0000 (14:32 -0500)

committer Bruce Momjian <bruce@momjian.us>

2014年1月25日 19:33:27 +0000 (14:33 -0500)

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().

doc/src/sgml/ref/create_table.sgml patch | blob | blame | history

diff --git a/doc/src/sgml/ref/create_table.sgml b/doc/src/sgml/ref/create_table.sgml

index a422edd2313dfcf51db3fa53d272227dec5f844c..e0b8a4ecaf60a0595f2e340aa4b9fc1d5a1d2812 100644 (file)

--- a/doc/src/sgml/ref/create_table.sgml

+++ b/doc/src/sgml/ref/create_table.sgml

@@ -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>

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