3 # The author disclaims copyright to this source code. In place of
4 # a legal notice, here is a blessing:
6 # May you do good and not evil.
7 # May you find forgiveness for yourself and forgive others.
8 # May you share freely, never taking more than you give.
10 #***********************************************************************
12 # This file implements tests to verify that the "testable statements" in
13 # the lang_update.html document are correct.
15 set testdir [file dirname $argv0]
16 source $testdir/tester.tcl
21 # e_update-1.*: Test statements describing the workings of UPDATE statements.
23 # e_update-2.*: Test the restrictions on the UPDATE statement syntax that
24 # can be used within triggers.
26 # e_update-3.*: Test the special LIMIT/OFFSET and ORDER BY clauses that can
27 # be used with UPDATE when SQLite is compiled with
28 # SQLITE_ENABLE_UPDATE_DELETE_LIMIT.
33 do_execsql_test e_update-0.0 {
34 ATTACH 'test.db2' AS aux;
35 CREATE TABLE t1(a, b);
36 CREATE TABLE t2(a, b, c);
37 CREATE TABLE t3(a, b UNIQUE);
38 CREATE TABLE t6(x, y);
39 CREATE INDEX i1 ON t1(a);
41 CREATE TEMP TABLE t4(x, y);
42 CREATE TEMP TABLE t6(x, y);
44 CREATE TABLE aux.t1(a, b);
45 CREATE TABLE aux.t5(a, b);
48 proc do_update_tests {args} {
49 uplevel do_select_tests $args
52 # -- syntax diagram update-stmt
54 do_update_tests e_update-0 {
55 1 "UPDATE t1 SET a=10" {}
56 2 "UPDATE t1 SET a=10, b=5" {}
57 3 "UPDATE t1 SET a=10 WHERE b=5" {}
58 4 "UPDATE t1 SET b=5,a=10 WHERE 1" {}
59 5 "UPDATE main.t1 SET a=10" {}
60 6 "UPDATE main.t1 SET a=10, b=5" {}
61 7 "UPDATE main.t1 SET a=10 WHERE b=5" {}
62 9 "UPDATE OR ROLLBACK t1 SET a=10" {}
63 10 "UPDATE OR ROLLBACK t1 SET a=10, b=5" {}
64 11 "UPDATE OR ROLLBACK t1 SET a=10 WHERE b=5" {}
65 12 "UPDATE OR ROLLBACK t1 SET b=5,a=10 WHERE 1" {}
66 13 "UPDATE OR ROLLBACK main.t1 SET a=10" {}
67 14 "UPDATE OR ROLLBACK main.t1 SET a=10, b=5" {}
68 15 "UPDATE OR ROLLBACK main.t1 SET a=10 WHERE b=5" {}
69 16 "UPDATE OR ROLLBACK main.t1 SET b=5,a=10 WHERE 1" {}
70 17 "UPDATE OR ABORT t1 SET a=10" {}
71 18 "UPDATE OR ABORT t1 SET a=10, b=5" {}
72 19 "UPDATE OR ABORT t1 SET a=10 WHERE b=5" {}
73 20 "UPDATE OR ABORT t1 SET b=5,a=10 WHERE 1" {}
74 21 "UPDATE OR ABORT main.t1 SET a=10" {}
75 22 "UPDATE OR ABORT main.t1 SET a=10, b=5" {}
76 23 "UPDATE OR ABORT main.t1 SET a=10 WHERE b=5" {}
77 24 "UPDATE OR ABORT main.t1 SET b=5,a=10 WHERE 1" {}
78 25 "UPDATE OR REPLACE t1 SET a=10" {}
79 26 "UPDATE OR REPLACE t1 SET a=10, b=5" {}
80 27 "UPDATE OR REPLACE t1 SET a=10 WHERE b=5" {}
81 28 "UPDATE OR REPLACE t1 SET b=5,a=10 WHERE 1" {}
82 29 "UPDATE OR REPLACE main.t1 SET a=10" {}
83 30 "UPDATE OR REPLACE main.t1 SET a=10, b=5" {}
84 31 "UPDATE OR REPLACE main.t1 SET a=10 WHERE b=5" {}
85 32 "UPDATE OR REPLACE main.t1 SET b=5,a=10 WHERE 1" {}
86 33 "UPDATE OR FAIL t1 SET a=10" {}
87 34 "UPDATE OR FAIL t1 SET a=10, b=5" {}
88 35 "UPDATE OR FAIL t1 SET a=10 WHERE b=5" {}
89 36 "UPDATE OR FAIL t1 SET b=5,a=10 WHERE 1" {}
90 37 "UPDATE OR FAIL main.t1 SET a=10" {}
91 38 "UPDATE OR FAIL main.t1 SET a=10, b=5" {}
92 39 "UPDATE OR FAIL main.t1 SET a=10 WHERE b=5" {}
93 40 "UPDATE OR FAIL main.t1 SET b=5,a=10 WHERE 1" {}
94 41 "UPDATE OR IGNORE t1 SET a=10" {}
95 42 "UPDATE OR IGNORE t1 SET a=10, b=5" {}
96 43 "UPDATE OR IGNORE t1 SET a=10 WHERE b=5" {}
97 44 "UPDATE OR IGNORE t1 SET b=5,a=10 WHERE 1" {}
98 45 "UPDATE OR IGNORE main.t1 SET a=10" {}
99 46 "UPDATE OR IGNORE main.t1 SET a=10, b=5" {}
100 47 "UPDATE OR IGNORE main.t1 SET a=10 WHERE b=5" {}
101 48 "UPDATE OR IGNORE main.t1 SET b=5,a=10 WHERE 1" {}
104 # EVIDENCE-OF: R-38515-45264 An UPDATE statement is used to modify a
105 # subset of the values stored in zero or more rows of the database table
106 # identified by the qualified-table-name specified as part of the UPDATE
109 # Test cases e_update-1.1.1.* test the "identified by the
110 # qualified-table-name" part of the statement above. Tests
111 # e_update-1.1.2.* show that the "zero or more rows" part is
114 do_execsql_test e_update-1.1.0 {
115 INSERT INTO main.t1 VALUES(1, 'i');
116 INSERT INTO main.t1 VALUES(2, 'ii');
117 INSERT INTO main.t1 VALUES(3, 'iii');
119 INSERT INTO aux.t1 VALUES(1, 'I');
120 INSERT INTO aux.t1 VALUES(2, 'II');
121 INSERT INTO aux.t1 VALUES(3, 'III');
123 do_update_tests e_update-1.1 {
124 1.1 "UPDATE t1 SET a = a+1; SELECT * FROM t1" {2 i 3 ii 4 iii}
125 1.2 "UPDATE main.t1 SET a = a+1; SELECT * FROM main.t1" {3 i 4 ii 5 iii}
126 1.3 "UPDATE aux.t1 SET a = a+1; SELECT * FROM aux.t1" {2 I 3 II 4 III}
128 2.1 "UPDATE t1 SET a = a+1 WHERE a = 1; SELECT * FROM t1" {3 i 4 ii 5 iii}
129 2.2 "UPDATE t1 SET a = a+1 WHERE a = 4; SELECT * FROM t1" {3 i 5 ii 5 iii}
132 # EVIDENCE-OF: R-55869-30521 If the UPDATE statement does not have a
133 # WHERE clause, all rows in the table are modified by the UPDATE.
135 do_execsql_test e_update-1.2.0 {
137 INSERT INTO main.t1 VALUES(1, 'i');
138 INSERT INTO main.t1 VALUES(2, 'ii');
139 INSERT INTO main.t1 VALUES(3, 'iii');
141 do_update_tests e_update-1.2 {
142 1 "UPDATE t1 SET b = 'roman' ; SELECT * FROM t1"
143 {1 roman 2 roman 3 roman}
145 2 "UPDATE t1 SET a = 'greek' ; SELECT * FROM t1"
146 {greek roman greek roman greek roman}
149 # EVIDENCE-OF: R-58095-46013 Otherwise, the UPDATE affects only those
150 # rows for which the WHERE clause boolean expression is true.
152 do_execsql_test e_update-1.3.0 {
154 INSERT INTO main.t1 VALUES(NULL, '');
155 INSERT INTO main.t1 VALUES(1, 'i');
156 INSERT INTO main.t1 VALUES(2, 'ii');
157 INSERT INTO main.t1 VALUES(3, 'iii');
159 do_update_tests e_update-1.3 {
160 1 "UPDATE t1 SET b = 'roman' WHERE a<2 ; SELECT * FROM t1"
161 {{} {} 1 roman 2 ii 3 iii}
163 2 "UPDATE t1 SET b = 'egyptian' WHERE (a-3)/10.0 ; SELECT * FROM t1"
164 {{} {} 1 egyptian 2 egyptian 3 iii}
166 3 "UPDATE t1 SET b = 'macedonian' WHERE a; SELECT * FROM t1"
167 {{} {} 1 macedonian 2 macedonian 3 macedonian}
169 4 "UPDATE t1 SET b = 'lithuanian' WHERE a IS NULL; SELECT * FROM t1"
170 {{} lithuanian 1 macedonian 2 macedonian 3 macedonian}
173 # EVIDENCE-OF: R-58129-20729 It is not an error if the WHERE clause does
174 # not evaluate to true for any row in the table - this just means that
175 # the UPDATE statement affects zero rows.
177 do_execsql_test e_update-1.4.0 {
179 INSERT INTO main.t1 VALUES(NULL, '');
180 INSERT INTO main.t1 VALUES(1, 'i');
181 INSERT INTO main.t1 VALUES(2, 'ii');
182 INSERT INTO main.t1 VALUES(3, 'iii');
184 do_update_tests e_update-1.4 -query {
187 1 "UPDATE t1 SET b = 'burmese' WHERE a=5" {{} {} 1 i 2 ii 3 iii}
189 2 "UPDATE t1 SET b = 'burmese' WHERE length(b)<1 AND a IS NOT NULL"
190 {{} {} 1 i 2 ii 3 iii}
192 3 "UPDATE t1 SET b = 'burmese' WHERE 0" {{} {} 1 i 2 ii 3 iii}
194 4 "UPDATE t1 SET b = 'burmese' WHERE (SELECT a FROM t1 WHERE rowid=1)"
195 {{} {} 1 i 2 ii 3 iii}
198 # EVIDENCE-OF: R-40598-36595 For each affected row, the named columns
199 # are set to the values found by evaluating the corresponding scalar
202 # EVIDENCE-OF: R-40472-60438 Columns that do not appear in the list of
203 # assignments are left unmodified.
205 do_execsql_test e_update-1.5.0 {
206 INSERT INTO t2(rowid, a, b, c) VALUES(1, 3, 1, 4);
207 INSERT INTO t2(rowid, a, b, c) VALUES(2, 1, 5, 9);
208 INSERT INTO t2(rowid, a, b, c) VALUES(3, 2, 6, 5);
210 do_update_tests e_update-1.5 -query {
213 1 "UPDATE t2 SET c = 1+1 WHERE a=2"
216 2 "UPDATE t2 SET b = 4/2, c=CAST((0.4*5) AS INTEGER) WHERE a<3"
219 3 "UPDATE t2 SET a = 1"
222 4 "UPDATE t2 SET b = (SELECT count(*)+2 FROM t2), c = 24/3+1 WHERE rowid=2"
225 5 "UPDATE t2 SET a = 3 WHERE c = 4"
228 6 "UPDATE t2 SET a = b WHERE rowid>2"
231 6 "UPDATE t2 SET b=6, c=5 WHERE a=b AND b=c"
235 # EVIDENCE-OF: R-34751-18293 If a single column-name appears more than
236 # once in the list of assignment expressions, all but the rightmost
237 # occurrence is ignored.
239 do_update_tests e_update-1.6 -query {
242 1 "UPDATE t2 SET c=5, c=6, c=7 WHERE rowid=1" {3 1 7 1 5 9 2 6 5}
243 2 "UPDATE t2 SET c=7, c=6, c=5 WHERE rowid=1" {3 1 5 1 5 9 2 6 5}
244 3 "UPDATE t2 SET c=5, b=6, c=7 WHERE rowid=1" {3 6 7 1 5 9 2 6 5}
247 # EVIDENCE-OF: R-36239-04077 The scalar expressions may refer to columns
248 # of the row being updated.
250 # EVIDENCE-OF: R-04558-24451 In this case all scalar expressions are
251 # evaluated before any assignments are made.
253 do_execsql_test e_update-1.7.0 {
255 INSERT INTO t2(rowid, a, b, c) VALUES(1, 3, 1, 4);
256 INSERT INTO t2(rowid, a, b, c) VALUES(2, 1, 5, 9);
257 INSERT INTO t2(rowid, a, b, c) VALUES(3, 2, 6, 5);
259 do_update_tests e_update-1.7 -query {
262 1 "UPDATE t2 SET a=b+c" {5 1 4 14 5 9 11 6 5}
263 2 "UPDATE t2 SET a=b, b=a" {1 5 4 5 14 9 6 11 5}
264 3 "UPDATE t2 SET a=c||c, c=NULL" {44 5 {} 99 14 {} 55 11 {}}
267 # EVIDENCE-OF: R-28518-13457 The optional "OR action" conflict clause
268 # that follows the UPDATE keyword allows the user to nominate a specific
269 # constraint conflict resolution algorithm to use during this one UPDATE
272 do_execsql_test e_update-1.8.0 {
274 INSERT INTO t3 VALUES(1, 'one');
275 INSERT INTO t3 VALUES(2, 'two');
276 INSERT INTO t3 VALUES(3, 'three');
277 INSERT INTO t3 VALUES(4, 'four');
279 foreach {tn sql error ac data } {
280 1 "UPDATE t3 SET b='one' WHERE a=3"
281 {UNIQUE constraint failed: t3.b} 1 {1 one 2 two 3 three 4 four}
283 2 "UPDATE OR REPLACE t3 SET b='one' WHERE a=3"
284 {} 1 {2 two 3 one 4 four}
286 3 "UPDATE OR FAIL t3 SET b='three'"
287 {UNIQUE constraint failed: t3.b} 1 {2 three 3 one 4 four}
289 4 "UPDATE OR IGNORE t3 SET b='three' WHERE a=3"
290 {} 1 {2 three 3 one 4 four}
292 5 "UPDATE OR ABORT t3 SET b='three' WHERE a=3"
293 {UNIQUE constraint failed: t3.b} 1 {2 three 3 one 4 four}
295 6 "BEGIN" {} 0 {2 three 3 one 4 four}
297 7 "UPDATE t3 SET b='three' WHERE a=3"
298 {UNIQUE constraint failed: t3.b} 0 {2 three 3 one 4 four}
300 8 "UPDATE OR ABORT t3 SET b='three' WHERE a=3"
301 {UNIQUE constraint failed: t3.b} 0 {2 three 3 one 4 four}
303 9 "UPDATE OR FAIL t3 SET b='two'"
304 {UNIQUE constraint failed: t3.b} 0 {2 two 3 one 4 four}
306 10 "UPDATE OR IGNORE t3 SET b='four' WHERE a=3"
307 {} 0 {2 two 3 one 4 four}
309 11 "UPDATE OR REPLACE t3 SET b='four' WHERE a=3"
312 12 "UPDATE OR ROLLBACK t3 SET b='four'"
313 {UNIQUE constraint failed: t3.b} 1 {2 three 3 one 4 four}
315 do_catchsql_test e_update-1.8.$tn.1 $sql [list [expr {$error!=""}] $error]
316 do_execsql_test e_update-1.8.$tn.2 {SELECT * FROM t3} [list {*}$data]
317 do_test e_update-1.8.$tn.3 {sqlite3_get_autocommit db} $ac
322 # EVIDENCE-OF: R-12123-54095 The table-name specified as part of an
323 # UPDATE statement within a trigger body must be unqualified.
325 # EVIDENCE-OF: R-43190-62442 In other words, the schema-name. prefix on
326 # the table name of the UPDATE is not allowed within triggers.
328 do_update_tests e_update-2.1 -error {
329 qualified table names are not allowed on INSERT, UPDATE, and DELETE statements within triggers
332 CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
333 UPDATE main.t2 SET a=1, b=2, c=3;
338 CREATE TRIGGER tr1 BEFORE UPDATE ON t2 BEGIN
339 UPDATE aux.t1 SET a=1, b=2;
344 CREATE TRIGGER tr1 AFTER DELETE ON t4 BEGIN
345 UPDATE main.t1 SET a=1, b=2;
350 # EVIDENCE-OF: R-06085-13761 Unless the table to which the trigger is
351 # attached is in the TEMP database, the table being updated by the
352 # trigger program must reside in the same database as it.
354 do_update_tests e_update-2.2 -error {
358 CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
361 INSERT INTO t1 VALUES(1, 2);
365 CREATE TRIGGER aux.tr1 AFTER INSERT ON t5 BEGIN
368 INSERT INTO t5 VALUES(1, 2);
371 do_execsql_test e_update-2.2.X {
373 DROP TRIGGER aux.tr1;
376 # EVIDENCE-OF: R-29512-54644 If the table to which the trigger is
377 # attached is in the TEMP database, then the unqualified name of the
378 # table being updated is resolved in the same way as it is for a
379 # top-level statement (by searching first the TEMP database, then the
380 # main database, then any other databases in the order they were
383 do_execsql_test e_update-2.3.0 {
384 SELECT 'main', tbl_name FROM main.sqlite_master WHERE type = 'table';
385 SELECT 'temp', tbl_name FROM sqlite_temp_master WHERE type = 'table';
386 SELECT 'aux', tbl_name FROM aux.sqlite_master WHERE type = 'table';
397 do_execsql_test e_update-2.3.1 {
400 INSERT INTO main.t6 VALUES(1, 2);
401 INSERT INTO temp.t6 VALUES(1, 2);
403 CREATE TRIGGER temp.tr1 AFTER INSERT ON t4 BEGIN
407 INSERT INTO t4 VALUES(1, 2);
408 SELECT * FROM main.t6;
409 SELECT * FROM temp.t6;
411 do_execsql_test e_update-2.3.2 {
414 INSERT INTO main.t1 VALUES(1, 2);
415 INSERT INTO aux.t1 VALUES(1, 2);
417 CREATE TRIGGER temp.tr2 AFTER DELETE ON t4 BEGIN
422 SELECT * FROM main.t1;
423 SELECT * FROM aux.t1;
425 do_execsql_test e_update-2.3.3 {
427 INSERT INTO aux.t5 VALUES(1, 2);
429 INSERT INTO t4 VALUES('x', 'y');
430 CREATE TRIGGER temp.tr3 AFTER UPDATE ON t4 BEGIN
435 SELECT * FROM aux.t5;
438 # EVIDENCE-OF: R-19619-42762 The INDEXED BY and NOT INDEXED clauses are
439 # not allowed on UPDATE statements within triggers.
441 do_update_tests e_update-2.4 -error {
442 the %s %s clause is not allowed on UPDATE or DELETE statements within triggers
445 CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN
446 UPDATE t1 INDEXED BY i1 SET a=a+1;
451 CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN
452 UPDATE t1 NOT INDEXED SET a=a+1;
457 ifcapable update_delete_limit {
459 # EVIDENCE-OF: R-57359-59558 The LIMIT and ORDER BY clauses for UPDATE
460 # are unsupported within triggers, regardless of the compilation options
461 # used to build SQLite.
463 do_update_tests e_update-2.5 -error {
464 near "%s": syntax error
467 CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN
468 UPDATE t1 SET a=a+1 LIMIT 10;
473 CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN
474 UPDATE t1 SET a=a+1 ORDER BY a LIMIT 10;
479 CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN
480 UPDATE t1 SET a=a+1 ORDER BY a LIMIT 10 OFFSET 2;
485 CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN
486 UPDATE t1 SET a=a+1 LIMIT 10 OFFSET 2;
491 # EVIDENCE-OF: R-59581-44104 If SQLite is built with the
492 # SQLITE_ENABLE_UPDATE_DELETE_LIMIT compile-time option then the syntax
493 # of the UPDATE statement is extended with optional ORDER BY and LIMIT
496 # -- syntax diagram update-stmt-limited
498 do_update_tests e_update-3.0 {
499 1 "UPDATE t1 SET a=b LIMIT 5" {}
500 2 "UPDATE t1 SET a=b LIMIT 5-1 OFFSET 2+2" {}
501 3 "UPDATE t1 SET a=b LIMIT 2+2, 16/4" {}
502 4 "UPDATE t1 SET a=b ORDER BY a LIMIT 5" {}
503 5 "UPDATE t1 SET a=b ORDER BY a LIMIT 5-1 OFFSET 2+2" {}
504 6 "UPDATE t1 SET a=b ORDER BY a LIMIT 2+2, 16/4" {}
505 7 "UPDATE t1 SET a=b WHERE a>2 LIMIT 5" {}
506 8 "UPDATE t1 SET a=b WHERE a>2 LIMIT 5-1 OFFSET 2+2" {}
507 9 "UPDATE t1 SET a=b WHERE a>2 LIMIT 2+2, 16/4" {}
508 10 "UPDATE t1 SET a=b WHERE a>2 ORDER BY a LIMIT 5" {}
509 11 "UPDATE t1 SET a=b WHERE a>2 ORDER BY a LIMIT 5-1 OFFSET 2+2" {}
510 12 "UPDATE t1 SET a=b WHERE a>2 ORDER BY a LIMIT 2+2, 16/4" {}
513 do_execsql_test e_update-3.1.0 {
514 CREATE TABLE t7(q, r, s);
515 INSERT INTO t7 VALUES(1, 'one', 'X');
516 INSERT INTO t7 VALUES(2, 'two', 'X');
517 INSERT INTO t7 VALUES(3, 'three', 'X');
518 INSERT INTO t7 VALUES(4, 'four', 'X');
519 INSERT INTO t7 VALUES(5, 'five', 'X');
520 INSERT INTO t7 VALUES(6, 'six', 'X');
521 INSERT INTO t7 VALUES(7, 'seven', 'X');
522 INSERT INTO t7 VALUES(8, 'eight', 'X');
523 INSERT INTO t7 VALUES(9, 'nine', 'X');
524 INSERT INTO t7 VALUES(10, 'ten', 'X');
527 # EVIDENCE-OF: R-58862-44169 If an UPDATE statement has a LIMIT clause,
528 # the maximum number of rows that will be updated is found by evaluating
529 # the accompanying expression and casting it to an integer value.
531 do_update_tests e_update-3.1 -query { SELECT s FROM t7 } {
532 1 "UPDATE t7 SET s = q LIMIT 5" {1 2 3 4 5 X X X X X}
533 2 "UPDATE t7 SET s = r WHERE q>2 LIMIT 4" {1 2 three four five six X X X X}
534 3 "UPDATE t7 SET s = q LIMIT 0" {1 2 three four five six X X X X}
537 # EVIDENCE-OF: R-63582-45120 A negative value is interpreted as "no limit".
539 do_update_tests e_update-3.2 -query { SELECT s FROM t7 } {
540 1 "UPDATE t7 SET s = q LIMIT -1" {1 2 3 4 5 6 7 8 9 10}
541 2 "UPDATE t7 SET s = r WHERE q>4 LIMIT -1"
542 {1 2 3 4 five six seven eight nine ten}
543 3 "UPDATE t7 SET s = 'X' LIMIT -1" {X X X X X X X X X X}
546 # EVIDENCE-OF: R-18628-11938 If the LIMIT expression evaluates to
547 # non-negative value N and the UPDATE statement has an ORDER BY clause,
548 # then all rows that would be updated in the absence of the LIMIT clause
549 # are sorted according to the ORDER BY and the first N updated.
551 do_update_tests e_update-3.3 -query { SELECT s FROM t7 } {
552 1 "UPDATE t7 SET s = q ORDER BY r LIMIT 3" {X X X 4 5 X X 8 X X}
553 2 "UPDATE t7 SET s = r ORDER BY r DESC LIMIT 2" {X two three 4 5 X X 8 X X}
554 3 "UPDATE t7 SET s = q ORDER BY q DESC LIMIT 5" {X two three 4 5 6 7 8 9 10}
556 X "UPDATE t7 SET s = 'X'" {X X X X X X X X X X}
559 # EVIDENCE-OF: R-30955-38324 If the UPDATE statement also has an OFFSET
560 # clause, then it is similarly evaluated and cast to an integer value.
561 # If the OFFSET expression evaluates to a non-negative value M, then the
562 # first M rows are skipped and the following N rows updated instead.
564 do_update_tests e_update-3.3 -query { SELECT s FROM t7 } {
565 1 "UPDATE t7 SET s = q ORDER BY q LIMIT 3 OFFSET 2" {X X 3 4 5 X X X X X}
566 2 "UPDATE t7 SET s = q ORDER BY q DESC LIMIT 2, 3 " {X X 3 4 5 6 7 8 X X}
568 X "UPDATE t7 SET s = 'X'" {X X X X X X X X X X}
571 # EVIDENCE-OF: R-19486-35828 If the UPDATE statement has no ORDER BY
572 # clause, then all rows that would be updated in the absence of the
573 # LIMIT clause are assembled in an arbitrary order before applying the
574 # LIMIT and OFFSET clauses to determine which are actually updated.
576 # In practice, "arbitrary order" is rowid order. This is also tested
577 # by e_update-3.2.* above.
579 do_update_tests e_update-3.4 -query { SELECT s FROM t7 } {
580 1 "UPDATE t7 SET s = q LIMIT 4, 2" {X X X X 5 6 X X X X}
581 2 "UPDATE t7 SET s = q LIMIT 2 OFFSET 7" {X X X X 5 6 X 8 9 X}
584 # EVIDENCE-OF: R-10927-26133 The ORDER BY clause on an UPDATE statement
585 # is used only to determine which rows fall within the LIMIT. The order
586 # in which rows are modified is arbitrary and is not influenced by the
589 do_execsql_test e_update-3.5.0 {
591 CREATE TRIGGER tr7 BEFORE UPDATE ON t7 BEGIN
592 INSERT INTO t8 VALUES(old.q);
595 do_update_tests e_update-3.5 -query { SELECT x FROM t8 ; DELETE FROM t8 } {
596 1 "UPDATE t7 SET s = q ORDER BY r LIMIT -1" {1 2 3 4 5 6 7 8 9 10}
597 2 "UPDATE t7 SET s = q ORDER BY r ASC LIMIT -1" {1 2 3 4 5 6 7 8 9 10}
598 3 "UPDATE t7 SET s = q ORDER BY r DESC LIMIT -1" {1 2 3 4 5 6 7 8 9 10}
599 4 "UPDATE t7 SET s = q ORDER BY q DESC LIMIT 5" {6 7 8 9 10}
603 } ;# ifcapable update_delete_limit