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update

This commit is contained in:
Bruce Momjian 2000-04-14 22:13:24 +00:00
parent 6787c6c9e8
commit 49b2f22f46
1 changed files with 16 additions and 11 deletions
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27
doc/src/sgml/ref/create_table.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.23 2000/04/14 21:44:21 momjian Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_table.sgml,v 1.24 2000/04/14 22:13:24 momjian Exp $
Postgres documentation
-->
@ -957,11 +957,13 @@ ERROR: Cannot insert a duplicate key into a unique index.
<term>MATCH <replaceable class="parameter">matchtype</replaceable></term>
<listitem>
<para>
The type of comparison to do between the table data. There are
three types of matching, MATCH FULL, MATCH PARTIAL, and the
unspecified match type used if no match type is specified.
MATCH PARTIAL is not
currently supported.
There are three match types: MATCH FULL, MATCH PARTIAL, and a
default match type if none is specified. MATCH FULL will not
allow one column of a multi-column foreign key to be NULL
unless all foreign key columns are NULL. The default MATCH type
allows a single foreign key column to be NULL while other parts
of the foreign key are not NULL. MATCH PARTIAL is not currently
supported.
</para>
</listitem>
</varlistentry>
@ -1174,7 +1176,7 @@ ERROR: <replaceable class="parameter">name</replaceable> referential integrity
</title>
<para>
Currently <productname>Postgres</productname> only supports MATCH
FULL and an unspecified match type. In addition, the referenced
FULL and a default match type. In addition, the referenced
columns are supposed to be the columns of a UNIQUE constraint in
the referenced table, however <productname>Postgres</productname>
does not enforce this.
@ -1503,10 +1505,13 @@ FOREIGN KEY ( <replaceable class="parameter">column</replaceable> [, ...] ) REFE
<term>MATCH <replaceable class="parameter">matchtype</replaceable></term>
<listitem>
<para>
The type of comparison to do between the table data. There are
three types of matching, MATCH FULL, MATCH PARTIAL, and the
unspecified match type used if no match type is specified.
MATCH PARTIAL is not currently supported.
There are three match types: MATCH FULL, MATCH PARTIAL, and a
default match type if none is specified. MATCH FULL will not
allow one column of a multi-column foreign key to be NULL
unless all foreign key columns are NULL. The default MATCH type
allows a single foreign key column to be NULL while other parts
of the foreign key are not NULL. MATCH PARTIAL is not currently
supported.
</para>
</listitem>
</varlistentry>