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Modify pg_dump to dump foreign-key constraints as constraints, not as

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sets of triggers.  Also modify psql \d command to show foreign key
constraints as such and hide the triggers.  pg_get_constraintdef()
function added to backend to support these.  From Rod Taylor, code
review and some editorialization by Tom Lane.
This commit is contained in:
Tom Lane
2002-08-16 23:01:21 +00:00
parent 8dabef838c
commit a208ea72bc
7 changed files with 421 additions and 20 deletions
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22
doc/src/sgml/func.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.111 2002/08/14 02:45:09 ishii Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/func.sgml,v 1.112 2002/08/16 23:01:18 tgl Exp $
PostgreSQL documentation
-->
@ -5521,6 +5521,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry><type>text</type></entry>
<entry>Get CREATE INDEX command for index</entry>
</row>
<row>
<entry><function>pg_get_constraintdef</function>(<parameter>constraintOID</parameter>)</entry>
<entry><type>text</type></entry>
<entry>Get definition of a constraint</entry>
</row>
<row>
<entry><function>pg_get_userbyid</function>(<parameter>userid</parameter>)</entry>
<entry><type>name</type></entry>
@ -5542,16 +5547,25 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<primary>pg_get_indexdef</primary>
</indexterm>
<indexterm zone="functions-misc">
<primary>pg_get_constraintdef</primary>
</indexterm>
<indexterm zone="functions-misc">
<primary>pg_get_userbyid</primary>
</indexterm>
<para>
These functions extract information from the system catalogs.
<function>pg_get_viewdef()</function>, <function>pg_get_ruledef()</function>, and
<function>pg_get_indexdef()</function> respectively reconstruct the creating
command for a view, rule, or index. (Note that this is a decompiled
<function>pg_get_viewdef()</function>,
<function>pg_get_ruledef()</function>,
<function>pg_get_indexdef()</function>, and
<function>pg_get_constraintdef()</function> respectively reconstruct the
creating command for a view, rule, index, or constraint.
(Note that this is a decompiled
reconstruction, not the verbatim text of the command.)
At present <function>pg_get_constraintdef()</function> only works for
foreign-key constraints.
<function>pg_get_userbyid()</function> extracts a user's name given a
<structfield>usesysid</structfield> value.
</para>