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Fix bugs in referential_constraints view.

This commit is contained in:
Peter Eisentraut 2003-10-16 23:46:17 +00:00
parent 4a48c671d2
commit 44430dbc15
2 changed files with 31 additions and 19 deletions
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6
doc/src/sgml/information_schema.sgml
View File

@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/information_schema.sgml,v 1.9 2003/09/20 20:12:05 tgl Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/information_schema.sgml,v 1.10 2003/10/16 23:46:17 petere Exp $ -->
<chapter id="information-schema">
<title>The Information Schema</title>
@ -2146,7 +2146,7 @@ ORDER BY c.ordinal_position;
<entry>
Update rule of the foreign key constraint:
<literal>CASCADE</literal>, <literal>SET NULL</literal>,
<literal>SET DEFAULT</literal>, <literal>RESTRICT</literal>,or
<literal>SET DEFAULT</literal>, <literal>RESTRICT</literal>, or
<literal>NO ACTION</literal>.
</entry>
</row>
@ -2157,7 +2157,7 @@ ORDER BY c.ordinal_position;
<entry>
Delete rule of the foreign key constraint:
<literal>CASCADE</literal>, <literal>SET NULL</literal>,
<literal>SET DEFAULT</literal>, <literal>RESTRICT</literal>,or
<literal>SET DEFAULT</literal>, <literal>RESTRICT</literal>, or
<literal>NO ACTION</literal>.
</entry>
</row>

44
src/backend/catalog/information_schema.sql
View File

@ -4,7 +4,7 @@
*
* Copyright 2003, PostgreSQL Global Development Group
*
* $Id: information_schema.sql,v 1.12 2003/06/29 15:14:41 petere Exp $
* $Id: information_schema.sql,v 1.13 2003/10/16 23:46:17 petere Exp $
*/
/*
@ -747,11 +747,26 @@ GRANT SELECT ON parameters TO PUBLIC;
* REFERENTIAL_CONSTRAINTS view
*/
CREATE FUNCTION _pg_keyissubset(smallint[], smallint[]) RETURNS boolean
LANGUAGE sql
IMMUTABLE
RETURNS NULL ON NULL INPUT
AS 'select $1[1] is null or ($1[1] = any ($2) and coalesce(_pg_keyissubset($1[2:array_upper($1,1)], $2), true))';
CREATE FUNCTION _pg_keysequal(smallint[], smallint[]) RETURNS boolean
LANGUAGE sql
IMMUTABLE
RETURNS NULL ON NULL INPUT
AS 'select _pg_keyissubset($1, $2) and _pg_keyissubset($2, $1)';
CREATE VIEW referential_constraints AS
SELECT CAST(current_database() AS sql_identifier) AS constraint_catalog,
CAST(ncon.nspname AS sql_identifier) AS constraint_schema,
CAST(con.conname AS sql_identifier) AS constraint_name,
CAST(current_database() AS sql_identifier) AS unique_constraint_catalog,
CAST(
CASE WHEN npkc.nspname IS NULL THEN NULL
ELSE current_database() END
AS sql_identifier) AS unique_constraint_catalog,
CAST(npkc.nspname AS sql_identifier) AS unique_constraint_schema,
CAST(pkc.conname AS sql_identifier) AS unique_constraint_name,
@ -766,7 +781,7 @@ CREATE VIEW referential_constraints AS
WHEN 'n' THEN 'SET NULL'
WHEN 'd' THEN 'SET DEFAULT'
WHEN 'r' THEN 'RESTRICT'
WHEN 'a' THEN 'NOACTION' END
WHEN 'a' THEN 'NO ACTION' END
AS character_data) AS update_rule,
CAST(
@ -774,22 +789,19 @@ CREATE VIEW referential_constraints AS
WHEN 'n' THEN 'SET NULL'
WHEN 'd' THEN 'SET DEFAULT'
WHEN 'r' THEN 'RESTRICT'
WHEN 'a' THEN 'NOACTION' END
WHEN 'a' THEN 'NO ACTION' END
AS character_data) AS delete_rule
FROM pg_namespace ncon,
pg_constraint con,
pg_class c,
pg_constraint pkc,
pg_namespace npkc,
pg_user u
FROM (pg_namespace ncon INNER JOIN pg_constraint con ON ncon.oid = con.connamespace
INNER JOIN pg_class c ON con.conrelid = c.oid
INNER JOIN pg_user u ON c.relowner = u.usesysid)
LEFT JOIN
(pg_constraint pkc INNER JOIN pg_namespace npkc ON pkc.connamespace = npkc.oid)
ON con.confrelid = pkc.conrelid AND _pg_keysequal(con.confkey, pkc.conkey)
WHERE ncon.oid = con.connamespace
AND con.conrelid = c.oid
AND con.confkey = pkc.conkey
AND pkc.connamespace = npkc.oid
AND c.relowner = u.usesysid
AND c.relkind = 'r'
WHERE c.relkind = 'r'
AND con.contype = 'f'
AND (pkc.contype IN ('p', 'u') OR pkc.contype IS NULL)
AND u.usename = current_user;
GRANT SELECT ON referential_constraints TO PUBLIC;