3 -- From Jan's original setup_ruletest.sql and run_ruletest.sql
8 -- Tables and rules for the view test
10 create table rtest_t1 (a int4, b int4);
11 create table rtest_t2 (a int4, b int4);
12 create table rtest_t3 (a int4, b int4);
14 create view rtest_v1 as select * from rtest_t1;
15 create rule rtest_v1_ins as on insert to rtest_v1 do instead
16 insert into rtest_t1 values (new.a, new.b);
17 create rule rtest_v1_upd as on update to rtest_v1 do instead
18 update rtest_t1 set a = new.a, b = new.b
20 create rule rtest_v1_del as on delete to rtest_v1 do instead
21 delete from rtest_t1 where a = old.a;
24 -- Tables and rules for the constraint update/delete test
27 -- Now that we have multiple action rule support, we check
28 -- both possible syntaxes to define them (The last action
29 -- can but must not have a semicolon at the end).
31 create table rtest_system (sysname text, sysdesc text);
32 create table rtest_interface (sysname text, ifname text);
33 create table rtest_person (pname text, pdesc text);
34 create table rtest_admin (pname text, sysname text);
36 create rule rtest_sys_upd as on update to rtest_system do (
37 update rtest_interface set sysname = new.sysname
38 where sysname = old.sysname;
39 update rtest_admin set sysname = new.sysname
40 where sysname = old.sysname
43 create rule rtest_sys_del as on delete to rtest_system do (
44 delete from rtest_interface where sysname = old.sysname;
45 delete from rtest_admin where sysname = old.sysname;
48 create rule rtest_pers_upd as on update to rtest_person do
49 update rtest_admin set pname = new.pname where pname = old.pname;
51 create rule rtest_pers_del as on delete to rtest_person do
52 delete from rtest_admin where pname = old.pname;
55 -- Tables and rules for the logging test
57 create table rtest_emp (ename char(20), salary money);
58 create table rtest_emplog (ename char(20), who name, action char(10), newsal money, oldsal money);
59 create table rtest_empmass (ename char(20), salary money);
61 create rule rtest_emp_ins as on insert to rtest_emp do
62 insert into rtest_emplog values (new.ename, current_user,
63 'hired', new.salary, '0.00');
65 create rule rtest_emp_upd as on update to rtest_emp where new.salary != old.salary do
66 insert into rtest_emplog values (new.ename, current_user,
67 'honored', new.salary, old.salary);
69 create rule rtest_emp_del as on delete to rtest_emp do
70 insert into rtest_emplog values (old.ename, current_user,
71 'fired', '0.00', old.salary);
74 -- Tables and rules for the multiple cascaded qualified instead
77 create table rtest_t4 (a int4, b text);
78 create table rtest_t5 (a int4, b text);
79 create table rtest_t6 (a int4, b text);
80 create table rtest_t7 (a int4, b text);
81 create table rtest_t8 (a int4, b text);
82 create table rtest_t9 (a int4, b text);
84 create rule rtest_t4_ins1 as on insert to rtest_t4
85 where new.a >= 10 and new.a < 20 do instead
86 insert into rtest_t5 values (new.a, new.b);
88 create rule rtest_t4_ins2 as on insert to rtest_t4
89 where new.a >= 20 and new.a < 30 do
90 insert into rtest_t6 values (new.a, new.b);
92 create rule rtest_t5_ins as on insert to rtest_t5
94 insert into rtest_t7 values (new.a, new.b);
96 create rule rtest_t6_ins as on insert to rtest_t6
97 where new.a > 25 do instead
98 insert into rtest_t8 values (new.a, new.b);
101 -- Tables and rules for the rule fire order test
103 create table rtest_order1 (a int4);
104 create table rtest_order2 (a int4, b int4, c text);
106 create sequence rtest_seq;
108 create rule rtest_order_r3 as on insert to rtest_order1 do instead
109 insert into rtest_order2 values (new.a, nextval('rtest_seq'),
110 'rule 3 - this should run 3rd or 4th');
112 create rule rtest_order_r4 as on insert to rtest_order1
113 where a < 100 do instead
114 insert into rtest_order2 values (new.a, nextval('rtest_seq'),
115 'rule 4 - this should run 2nd');
117 create rule rtest_order_r2 as on insert to rtest_order1 do
118 insert into rtest_order2 values (new.a, nextval('rtest_seq'),
119 'rule 2 - this should run 1st');
121 create rule rtest_order_r1 as on insert to rtest_order1 do instead
122 insert into rtest_order2 values (new.a, nextval('rtest_seq'),
123 'rule 1 - this should run 3rd or 4th');
126 -- Tables and rules for the instead nothing test
128 create table rtest_nothn1 (a int4, b text);
129 create table rtest_nothn2 (a int4, b text);
130 create table rtest_nothn3 (a int4, b text);
131 create table rtest_nothn4 (a int4, b text);
133 create rule rtest_nothn_r1 as on insert to rtest_nothn1
134 where new.a >= 10 and new.a < 20 do instead (select 1);
136 create rule rtest_nothn_r2 as on insert to rtest_nothn1
137 where new.a >= 30 and new.a < 40 do instead nothing;
139 create rule rtest_nothn_r3 as on insert to rtest_nothn2
140 where new.a >= 100 do instead
141 insert into rtest_nothn3 values (new.a, new.b);
143 create rule rtest_nothn_r4 as on insert to rtest_nothn2
147 -- Tests on a view that is select * of a table
148 -- and has insert/update/delete instead rules to
149 -- behave close like the real table.
153 -- We need test date later
155 insert into rtest_t2 values (1, 21);
156 insert into rtest_t2 values (2, 22);
157 insert into rtest_t2 values (3, 23);
159 insert into rtest_t3 values (1, 31);
160 insert into rtest_t3 values (2, 32);
161 insert into rtest_t3 values (3, 33);
162 insert into rtest_t3 values (4, 34);
163 insert into rtest_t3 values (5, 35);
166 insert into rtest_v1 values (1, 11);
167 insert into rtest_v1 values (2, 12);
168 select * from rtest_v1;
170 -- delete with constant expression
171 delete from rtest_v1 where a = 1;
172 select * from rtest_v1;
173 insert into rtest_v1 values (1, 11);
174 delete from rtest_v1 where b = 12;
175 select * from rtest_v1;
176 insert into rtest_v1 values (2, 12);
177 insert into rtest_v1 values (2, 13);
178 select * from rtest_v1;
179 ** Remember the delete rule on rtest_v1: It says
180 ** DO INSTEAD DELETE FROM rtest_t1 WHERE a = old.a
181 ** So this time both rows with a = 2 must get deleted
184 delete from rtest_v1 where b = 12;
185 select * from rtest_v1;
186 delete from rtest_v1;
189 insert into rtest_v1 select * from rtest_t2;
190 select * from rtest_v1;
191 delete from rtest_v1;
193 -- same with swapped targetlist
194 insert into rtest_v1 (b, a) select b, a from rtest_t2;
195 select * from rtest_v1;
197 -- now with only one target attribute
198 insert into rtest_v1 (a) select a from rtest_t3;
199 select * from rtest_v1;
200 select * from rtest_v1 where b isnull;
202 -- let attribute a differ (must be done on rtest_t1 - see above)
203 update rtest_t1 set a = a + 10 where b isnull;
204 delete from rtest_v1 where b isnull;
205 select * from rtest_v1;
207 -- now updates with constant expression
208 update rtest_v1 set b = 42 where a = 2;
209 select * from rtest_v1;
210 update rtest_v1 set b = 99 where b = 42;
211 select * from rtest_v1;
212 update rtest_v1 set b = 88 where b < 50;
213 select * from rtest_v1;
214 delete from rtest_v1;
215 insert into rtest_v1 select rtest_t2.a, rtest_t3.b where rtest_t2.a = rtest_t3.a;
216 select * from rtest_v1;
218 -- updates in a mergejoin
219 update rtest_v1 set b = rtest_t2.b where a = rtest_t2.a;
220 select * from rtest_v1;
221 insert into rtest_v1 select * from rtest_t3;
222 select * from rtest_v1;
223 update rtest_t1 set a = a + 10 where b > 30;
224 select * from rtest_v1;
225 update rtest_v1 set a = rtest_t3.a + 20 where b = rtest_t3.b;
226 select * from rtest_v1;
229 -- Test for constraint updates/deletes
231 insert into rtest_system values ('orion', 'Linux Jan Wieck');
232 insert into rtest_system values ('notjw', 'WinNT Jan Wieck (notebook)');
233 insert into rtest_system values ('neptun', 'Fileserver');
235 insert into rtest_interface values ('orion', 'eth0');
236 insert into rtest_interface values ('orion', 'eth1');
237 insert into rtest_interface values ('notjw', 'eth0');
238 insert into rtest_interface values ('neptun', 'eth0');
240 insert into rtest_person values ('jw', 'Jan Wieck');
241 insert into rtest_person values ('bm', 'Bruce Momjian');
243 insert into rtest_admin values ('jw', 'orion');
244 insert into rtest_admin values ('jw', 'notjw');
245 insert into rtest_admin values ('bm', 'neptun');
247 update rtest_system set sysname = 'pluto' where sysname = 'neptun';
249 select * from rtest_interface;
250 select * from rtest_admin;
252 update rtest_person set pname = 'jwieck' where pdesc = 'Jan Wieck';
254 -- Note: use ORDER BY here to ensure consistent output across all systems.
255 -- The above UPDATE affects two rows with equal keys, so they could be
256 -- updated in either order depending on the whim of the local qsort().
258 select * from rtest_admin order by pname, sysname;
260 delete from rtest_system where sysname = 'orion';
262 select * from rtest_interface;
263 select * from rtest_admin;
266 -- Rule qualification test
268 insert into rtest_emp values ('wiech', '5000.00');
269 insert into rtest_emp values ('gates', '80000.00');
270 update rtest_emp set ename = 'wiecx' where ename = 'wiech';
271 update rtest_emp set ename = 'wieck', salary = '6000.00' where ename = 'wiecx';
272 update rtest_emp set salary = '7000.00' where ename = 'wieck';
273 delete from rtest_emp where ename = 'gates';
275 select ename, who = current_user as "matches user", action, newsal, oldsal from rtest_emplog;
276 insert into rtest_empmass values ('meyer', '4000.00');
277 insert into rtest_empmass values ('maier', '5000.00');
278 insert into rtest_empmass values ('mayr', '6000.00');
279 insert into rtest_emp select * from rtest_empmass;
280 select ename, who = current_user as "matches user", action, newsal, oldsal from rtest_emplog;
281 update rtest_empmass set salary = salary + '1000.00';
282 update rtest_emp set salary = rtest_empmass.salary where ename = rtest_empmass.ename;
283 select ename, who = current_user as "matches user", action, newsal, oldsal from rtest_emplog;
284 delete from rtest_emp where ename = rtest_empmass.ename;
285 select ename, who = current_user as "matches user", action, newsal, oldsal from rtest_emplog;
288 -- Multiple cascaded qualified instead rule test
290 insert into rtest_t4 values (1, 'Record should go to rtest_t4');
291 insert into rtest_t4 values (2, 'Record should go to rtest_t4');
292 insert into rtest_t4 values (10, 'Record should go to rtest_t5');
293 insert into rtest_t4 values (15, 'Record should go to rtest_t5');
294 insert into rtest_t4 values (19, 'Record should go to rtest_t5 and t7');
295 insert into rtest_t4 values (20, 'Record should go to rtest_t4 and t6');
296 insert into rtest_t4 values (26, 'Record should go to rtest_t4 and t8');
297 insert into rtest_t4 values (28, 'Record should go to rtest_t4 and t8');
298 insert into rtest_t4 values (30, 'Record should go to rtest_t4');
299 insert into rtest_t4 values (40, 'Record should go to rtest_t4');
301 select * from rtest_t4;
302 select * from rtest_t5;
303 select * from rtest_t6;
304 select * from rtest_t7;
305 select * from rtest_t8;
307 delete from rtest_t4;
308 delete from rtest_t5;
309 delete from rtest_t6;
310 delete from rtest_t7;
311 delete from rtest_t8;
313 insert into rtest_t9 values (1, 'Record should go to rtest_t4');
314 insert into rtest_t9 values (2, 'Record should go to rtest_t4');
315 insert into rtest_t9 values (10, 'Record should go to rtest_t5');
316 insert into rtest_t9 values (15, 'Record should go to rtest_t5');
317 insert into rtest_t9 values (19, 'Record should go to rtest_t5 and t7');
318 insert into rtest_t9 values (20, 'Record should go to rtest_t4 and t6');
319 insert into rtest_t9 values (26, 'Record should go to rtest_t4 and t8');
320 insert into rtest_t9 values (28, 'Record should go to rtest_t4 and t8');
321 insert into rtest_t9 values (30, 'Record should go to rtest_t4');
322 insert into rtest_t9 values (40, 'Record should go to rtest_t4');
324 insert into rtest_t4 select * from rtest_t9 where a < 20;
326 select * from rtest_t4;
327 select * from rtest_t5;
328 select * from rtest_t6;
329 select * from rtest_t7;
330 select * from rtest_t8;
332 insert into rtest_t4 select * from rtest_t9 where b ~ 'and t8';
334 select * from rtest_t4;
335 select * from rtest_t5;
336 select * from rtest_t6;
337 select * from rtest_t7;
338 select * from rtest_t8;
340 insert into rtest_t4 select a + 1, b from rtest_t9 where a in (20, 30, 40);
342 select * from rtest_t4;
343 select * from rtest_t5;
344 select * from rtest_t6;
345 select * from rtest_t7;
346 select * from rtest_t8;
349 -- Check that the ordering of rules fired is correct
351 insert into rtest_order1 values (1);
352 select * from rtest_order2;
355 -- Check if instead nothing w/without qualification works
357 insert into rtest_nothn1 values (1, 'want this');
358 insert into rtest_nothn1 values (2, 'want this');
359 insert into rtest_nothn1 values (10, 'don''t want this');
360 insert into rtest_nothn1 values (19, 'don''t want this');
361 insert into rtest_nothn1 values (20, 'want this');
362 insert into rtest_nothn1 values (29, 'want this');
363 insert into rtest_nothn1 values (30, 'don''t want this');
364 insert into rtest_nothn1 values (39, 'don''t want this');
365 insert into rtest_nothn1 values (40, 'want this');
366 insert into rtest_nothn1 values (50, 'want this');
367 insert into rtest_nothn1 values (60, 'want this');
369 select * from rtest_nothn1;
371 insert into rtest_nothn2 values (10, 'too small');
372 insert into rtest_nothn2 values (50, 'too small');
373 insert into rtest_nothn2 values (100, 'OK');
374 insert into rtest_nothn2 values (200, 'OK');
376 select * from rtest_nothn2;
377 select * from rtest_nothn3;
379 delete from rtest_nothn1;
380 delete from rtest_nothn2;
381 delete from rtest_nothn3;
383 insert into rtest_nothn4 values (1, 'want this');
384 insert into rtest_nothn4 values (2, 'want this');
385 insert into rtest_nothn4 values (10, 'don''t want this');
386 insert into rtest_nothn4 values (19, 'don''t want this');
387 insert into rtest_nothn4 values (20, 'want this');
388 insert into rtest_nothn4 values (29, 'want this');
389 insert into rtest_nothn4 values (30, 'don''t want this');
390 insert into rtest_nothn4 values (39, 'don''t want this');
391 insert into rtest_nothn4 values (40, 'want this');
392 insert into rtest_nothn4 values (50, 'want this');
393 insert into rtest_nothn4 values (60, 'want this');
395 insert into rtest_nothn1 select * from rtest_nothn4;
397 select * from rtest_nothn1;
399 delete from rtest_nothn4;
401 insert into rtest_nothn4 values (10, 'too small');
402 insert into rtest_nothn4 values (50, 'too small');
403 insert into rtest_nothn4 values (100, 'OK');
404 insert into rtest_nothn4 values (200, 'OK');
406 insert into rtest_nothn2 select * from rtest_nothn4;
408 select * from rtest_nothn2;
409 select * from rtest_nothn3;
411 create table rtest_view1 (a int4, b text, v bool);
412 create table rtest_view2 (a int4);
413 create table rtest_view3 (a int4, b text);
414 create table rtest_view4 (a int4, b text, c int4);
415 create view rtest_vview1 as select a, b from rtest_view1 X
416 where 0 < (select count(*) from rtest_view2 Y where Y.a = X.a);
417 create view rtest_vview2 as select a, b from rtest_view1 where v;
418 create view rtest_vview3 as select a, b from rtest_vview2 X
419 where 0 < (select count(*) from rtest_view2 Y where Y.a = X.a);
420 create view rtest_vview4 as select X.a, X.b, count(Y.a) as refcount
421 from rtest_view1 X, rtest_view2 Y
424 create function rtest_viewfunc1(int4) returns int4 as
425 'select count(*) from rtest_view2 where a = $1'
427 create view rtest_vview5 as select a, b, rtest_viewfunc1(a) as refcount
430 insert into rtest_view1 values (1, 'item 1', 't');
431 insert into rtest_view1 values (2, 'item 2', 't');
432 insert into rtest_view1 values (3, 'item 3', 't');
433 insert into rtest_view1 values (4, 'item 4', 'f');
434 insert into rtest_view1 values (5, 'item 5', 't');
435 insert into rtest_view1 values (6, 'item 6', 'f');
436 insert into rtest_view1 values (7, 'item 7', 't');
437 insert into rtest_view1 values (8, 'item 8', 't');
439 insert into rtest_view2 values (2);
440 insert into rtest_view2 values (2);
441 insert into rtest_view2 values (4);
442 insert into rtest_view2 values (5);
443 insert into rtest_view2 values (7);
444 insert into rtest_view2 values (7);
445 insert into rtest_view2 values (7);
446 insert into rtest_view2 values (7);
448 select * from rtest_vview1;
449 select * from rtest_vview2;
450 select * from rtest_vview3;
451 select * from rtest_vview4;
452 select * from rtest_vview5;
454 insert into rtest_view3 select * from rtest_vview1 where a < 7;
455 select * from rtest_view3;
456 delete from rtest_view3;
458 insert into rtest_view3 select * from rtest_vview2 where a != 5 and b !~ '2';
459 select * from rtest_view3;
460 delete from rtest_view3;
462 insert into rtest_view3 select * from rtest_vview3;
463 select * from rtest_view3;
464 delete from rtest_view3;
466 insert into rtest_view4 select * from rtest_vview4 where 3 > refcount;
467 select * from rtest_view4;
468 delete from rtest_view4;
470 insert into rtest_view4 select * from rtest_vview5 where a > 2 and refcount = 0;
471 select * from rtest_view4;
472 delete from rtest_view4;
474 -- Test for computations in views
476 create table rtest_comp (
483 create table rtest_unitfact (
488 create view rtest_vcomp as
489 select X.part, (X.size * Y.factor) as size_in_cm
490 from rtest_comp X, rtest_unitfact Y
491 where X.unit = Y.unit;
494 insert into rtest_unitfact values ('m', 100.0);
495 insert into rtest_unitfact values ('cm', 1.0);
496 insert into rtest_unitfact values ('inch', 2.54);
498 insert into rtest_comp values ('p1', 'm', 5.0);
499 insert into rtest_comp values ('p2', 'm', 3.0);
500 insert into rtest_comp values ('p3', 'cm', 5.0);
501 insert into rtest_comp values ('p4', 'cm', 15.0);
502 insert into rtest_comp values ('p5', 'inch', 7.0);
503 insert into rtest_comp values ('p6', 'inch', 4.4);
505 select * from rtest_vcomp order by part;
507 select * from rtest_vcomp where size_in_cm > 10.0 order by size_in_cm using >;
510 -- In addition run the (slightly modified) queries from the
511 -- programmers manual section on the rule system.
513 CREATE TABLE shoe_data (
514 shoename char(10), -- primary key
515 sh_avail integer, -- available # of pairs
516 slcolor char(10), -- preferred shoelace color
517 slminlen float, -- miminum shoelace length
518 slmaxlen float, -- maximum shoelace length
519 slunit char(8) -- length unit
522 CREATE TABLE shoelace_data (
523 sl_name char(10), -- primary key
524 sl_avail integer, -- available # of pairs
525 sl_color char(10), -- shoelace color
526 sl_len float, -- shoelace length
527 sl_unit char(8) -- length unit
531 un_name char(8), -- the primary key
532 un_fact float -- factor to transform to cm
540 sh.slminlen * un.un_fact AS slminlen_cm,
542 sh.slmaxlen * un.un_fact AS slmaxlen_cm,
544 FROM shoe_data sh, unit un
545 WHERE sh.slunit = un.un_name;
547 CREATE VIEW shoelace AS
553 s.sl_len * u.un_fact AS sl_len_cm
554 FROM shoelace_data s, unit u
555 WHERE s.sl_unit = u.un_name;
557 CREATE VIEW shoe_ready AS
562 int4smaller(rsh.sh_avail, rsl.sl_avail) AS total_avail
563 FROM shoe rsh, shoelace rsl
564 WHERE rsl.sl_color = rsh.slcolor
565 AND rsl.sl_len_cm >= rsh.slminlen_cm
566 AND rsl.sl_len_cm <= rsh.slmaxlen_cm;
568 INSERT INTO unit VALUES ('cm', 1.0);
569 INSERT INTO unit VALUES ('m', 100.0);
570 INSERT INTO unit VALUES ('inch', 2.54);
572 INSERT INTO shoe_data VALUES ('sh1', 2, 'black', 70.0, 90.0, 'cm');
573 INSERT INTO shoe_data VALUES ('sh2', 0, 'black', 30.0, 40.0, 'inch');
574 INSERT INTO shoe_data VALUES ('sh3', 4, 'brown', 50.0, 65.0, 'cm');
575 INSERT INTO shoe_data VALUES ('sh4', 3, 'brown', 40.0, 50.0, 'inch');
577 INSERT INTO shoelace_data VALUES ('sl1', 5, 'black', 80.0, 'cm');
578 INSERT INTO shoelace_data VALUES ('sl2', 6, 'black', 100.0, 'cm');
579 INSERT INTO shoelace_data VALUES ('sl3', 0, 'black', 35.0 , 'inch');
580 INSERT INTO shoelace_data VALUES ('sl4', 8, 'black', 40.0 , 'inch');
581 INSERT INTO shoelace_data VALUES ('sl5', 4, 'brown', 1.0 , 'm');
582 INSERT INTO shoelace_data VALUES ('sl6', 0, 'brown', 0.9 , 'm');
583 INSERT INTO shoelace_data VALUES ('sl7', 7, 'brown', 60 , 'cm');
584 INSERT INTO shoelace_data VALUES ('sl8', 1, 'brown', 40 , 'inch');
587 SELECT * FROM shoelace;
588 SELECT * FROM shoe_ready WHERE total_avail >= 2;
590 CREATE TABLE shoelace_log (
591 sl_name char(10), -- shoelace changed
592 sl_avail integer, -- new available value
593 log_who name, -- who did it
594 log_when datetime -- when
597 -- Want "log_who" to be CURRENT_USER,
598 -- but that is non-portable for the regression test
599 -- - thomas 1999-02-21
601 CREATE RULE log_shoelace AS ON UPDATE TO shoelace_data
602 WHERE NEW.sl_avail != OLD.sl_avail
603 DO INSERT INTO shoelace_log VALUES (
610 UPDATE shoelace_data SET sl_avail = 6 WHERE sl_name = 'sl7';
612 SELECT * FROM shoelace_log;
614 CREATE RULE shoelace_ins AS ON INSERT TO shoelace
616 INSERT INTO shoelace_data VALUES (
623 CREATE RULE shoelace_upd AS ON UPDATE TO shoelace
625 UPDATE shoelace_data SET
626 sl_name = NEW.sl_name,
627 sl_avail = NEW.sl_avail,
628 sl_color = NEW.sl_color,
630 sl_unit = NEW.sl_unit
631 WHERE sl_name = OLD.sl_name;
633 CREATE RULE shoelace_del AS ON DELETE TO shoelace
635 DELETE FROM shoelace_data
636 WHERE sl_name = OLD.sl_name;
638 CREATE TABLE shoelace_arrive (
643 CREATE TABLE shoelace_ok (
648 CREATE RULE shoelace_ok_ins AS ON INSERT TO shoelace_ok
651 sl_avail = sl_avail + NEW.ok_quant
652 WHERE sl_name = NEW.ok_name;
654 INSERT INTO shoelace_arrive VALUES ('sl3', 10);
655 INSERT INTO shoelace_arrive VALUES ('sl6', 20);
656 INSERT INTO shoelace_arrive VALUES ('sl8', 20);
658 SELECT * FROM shoelace;
660 insert into shoelace_ok select * from shoelace_arrive;
662 SELECT * FROM shoelace;
664 SELECT * FROM shoelace_log;
666 CREATE VIEW shoelace_obsolete AS
667 SELECT * FROM shoelace WHERE NOT EXISTS
668 (SELECT shoename FROM shoe WHERE slcolor = sl_color);
670 CREATE VIEW shoelace_candelete AS
671 SELECT * FROM shoelace_obsolete WHERE sl_avail = 0;
673 insert into shoelace values ('sl9', 0, 'pink', 35.0, 'inch', 0.0);
674 insert into shoelace values ('sl10', 1000, 'magenta', 40.0, 'inch', 0.0);
676 SELECT * FROM shoelace_obsolete;
677 SELECT * FROM shoelace_candelete;
679 DELETE FROM shoelace WHERE EXISTS
680 (SELECT * FROM shoelace_candelete
681 WHERE sl_name = shoelace.sl_name);
683 SELECT * FROM shoelace;