Location via proxy:   [ UP ]  
[Report a bug]   [Manage cookies]                
Skip to content

Commit 592b690

Browse files
committed
Update rule examples
1 parent d27a566 commit 592b690

File tree

1 file changed

+23
-13
lines changed

1 file changed

+23
-13
lines changed

doc/src/sgml/ref/create_rule.sgml

Lines changed: 23 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
<!--
2-
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.11 2000/04/07 17:23:11 momjian Exp $
2+
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_rule.sgml,v 1.12 2000/04/07 17:35:08 momjian Exp $
33
Postgres documentation
44
-->
55

@@ -171,12 +171,14 @@ CREATE
171171
two rules have the same semantics:
172172
<programlisting>
173173
ON UPDATE TO emp.salary WHERE emp.name = "Joe"
174-
DO UPDATE emp ( ... ) WHERE ...
174+
DO
175+
UPDATE emp ( ... ) WHERE ...
175176
</programlisting>
176177

177178
<programlisting>
178179
ON UPDATE TO emp-1.salary WHERE emp-2.name = "Joe"
179-
DO UPDATE emp-3 ( ... ) WHERE ...
180+
DO
181+
UPDATE emp-3 ( ... ) WHERE ...
180182
</programlisting>
181183

182184
Each rule can have the optional tag INSTEAD.
@@ -203,13 +205,15 @@ ON UPDATE TO emp-1.salary WHERE emp-2.name = "Joe"
203205
<programlisting>
204206
CREATE RULE bad_rule_combination_1 AS
205207
ON SELECT TO emp
206-
DO INSTEAD SELECT TO toyemp;
208+
DO INSTEAD
209+
SELECT TO toyemp;
207210
</programlisting>
208211

209212
<programlisting>
210213
CREATE RULE bad_rule_combination_2 AS
211214
ON SELECT TO toyemp
212-
DO INSTEAD SELECT TO emp;
215+
DO INSTEAD
216+
SELECT TO emp;
213217
</programlisting>
214218
<para>
215219
This attempt to retrieve from EMP will cause
@@ -257,8 +261,10 @@ SELECT * FROM emp;
257261
<programlisting>
258262
CREATE RULE example_1 AS
259263
ON UPDATE emp.salary WHERE current.name = "Joe"
260-
DO UPDATE emp (salary = new.salary)
261-
WHERE emp.name = "Sam";
264+
DO
265+
UPDATE emp
266+
SET salary = new.salary
267+
WHERE emp.name = "Sam";
262268
</programlisting>
263269

264270
At the time Joe receives a salary adjustment, the event
@@ -275,8 +281,9 @@ CREATE RULE example_2 AS
275281
ON SELECT TO EMP.salary
276282
WHERE current.name = "Bill"
277283
DO INSTEAD
278-
SELECT (emp.salary) from emp
279-
WHERE emp.name = "Joe";
284+
SELECT emp.salary
285+
FROM emp
286+
WHERE emp.name = "Joe";
280287
</programlisting>
281288
</para>
282289
<para>
@@ -285,8 +292,9 @@ CREATE RULE example_2 AS
285292
the current user):
286293
<programlisting>
287294
CREATE RULE example_3 AS
288-
ON SELECT TO emp.salary
289-
WHERE current.dept = "shoe" AND current_user = "Joe"
295+
ON
296+
SELECT TO emp.salary
297+
WHERE current.dept = "shoe" AND current_user = "Joe"
290298
DO INSTEAD NOTHING;
291299
</programlisting>
292300
</para>
@@ -298,7 +306,8 @@ CREATE toyemp(name = char16, salary = int4);
298306
CREATE RULE example_4 AS
299307
ON SELECT TO toyemp
300308
DO INSTEAD
301-
SELECT (emp.name, emp.salary) FROM emp
309+
SELECT (emp.name, emp.salary)
310+
FROM emp
302311
WHERE emp.dept = "toy";
303312
</programlisting>
304313
</para>
@@ -307,7 +316,8 @@ CREATE RULE example_4 AS
307316
<programlisting>
308317
CREATE RULE example_5 AS
309318
ON INERT TO emp WHERE new.salary > 5000
310-
DO UPDATE NEWSET salary = 5000;
319+
DO
320+
UPDATE NEWSET salary = 5000;
311321
</programlisting>
312322
</para>
313323
</refsect1>

0 commit comments

Comments
 (0)