diff options
| author | bernard <[email protected]> | 2017-11-02 13:50:42 +0800 |
|---|---|---|
| committer | bernard <[email protected]> | 2017-11-02 13:50:42 +0800 |
| commit | b2057f506a09e2adef81fc77efd697d16ae14bec (patch) | |
| tree | 3affefabfe376a0ec1b3ac4a5eef957c1dd58dc8 /components/external/SQLite-3.8.1/test/e_update.test | |
| parent | 23582c8129228b4961ad35319cfd2d270039345f (diff) | |
[External] Remove external from RT-Thread
Diffstat (limited to 'components/external/SQLite-3.8.1/test/e_update.test')
| -rw-r--r-- | components/external/SQLite-3.8.1/test/e_update.test | 605 |
1 files changed, 0 insertions, 605 deletions
diff --git a/components/external/SQLite-3.8.1/test/e_update.test b/components/external/SQLite-3.8.1/test/e_update.test deleted file mode 100644 index 159e0676f5..0000000000 --- a/components/external/SQLite-3.8.1/test/e_update.test +++ /dev/null @@ -1,605 +0,0 @@ -# 2010 September 20 -# -# The author disclaims copyright to this source code. In place of -# a legal notice, here is a blessing: -# -# May you do good and not evil. -# May you find forgiveness for yourself and forgive others. -# May you share freely, never taking more than you give. -# -#*********************************************************************** -# -# This file implements tests to verify that the "testable statements" in -# the lang_update.html document are correct. -# -set testdir [file dirname $argv0] -source $testdir/tester.tcl - -#-------------------- -# Test organization: -# -# e_update-1.*: Test statements describing the workings of UPDATE statements. -# -# e_update-2.*: Test the restrictions on the UPDATE statement syntax that -# can be used within triggers. -# -# e_update-3.*: Test the special LIMIT/OFFSET and ORDER BY clauses that can -# be used with UPDATE when SQLite is compiled with -# SQLITE_ENABLE_UPDATE_DELETE_LIMIT. -# - -forcedelete test.db2 - -do_execsql_test e_update-0.0 { - ATTACH 'test.db2' AS aux; - CREATE TABLE t1(a, b); - CREATE TABLE t2(a, b, c); - CREATE TABLE t3(a, b UNIQUE); - CREATE TABLE t6(x, y); - CREATE INDEX i1 ON t1(a); - - CREATE TEMP TABLE t4(x, y); - CREATE TEMP TABLE t6(x, y); - - CREATE TABLE aux.t1(a, b); - CREATE TABLE aux.t5(a, b); -} {} - -proc do_update_tests {args} { - uplevel do_select_tests $args -} - -# -- syntax diagram update-stmt -# -do_update_tests e_update-0 { - 1 "UPDATE t1 SET a=10" {} - 2 "UPDATE t1 SET a=10, b=5" {} - 3 "UPDATE t1 SET a=10 WHERE b=5" {} - 4 "UPDATE t1 SET b=5,a=10 WHERE 1" {} - 5 "UPDATE main.t1 SET a=10" {} - 6 "UPDATE main.t1 SET a=10, b=5" {} - 7 "UPDATE main.t1 SET a=10 WHERE b=5" {} - 9 "UPDATE OR ROLLBACK t1 SET a=10" {} - 10 "UPDATE OR ROLLBACK t1 SET a=10, b=5" {} - 11 "UPDATE OR ROLLBACK t1 SET a=10 WHERE b=5" {} - 12 "UPDATE OR ROLLBACK t1 SET b=5,a=10 WHERE 1" {} - 13 "UPDATE OR ROLLBACK main.t1 SET a=10" {} - 14 "UPDATE OR ROLLBACK main.t1 SET a=10, b=5" {} - 15 "UPDATE OR ROLLBACK main.t1 SET a=10 WHERE b=5" {} - 16 "UPDATE OR ROLLBACK main.t1 SET b=5,a=10 WHERE 1" {} - 17 "UPDATE OR ABORT t1 SET a=10" {} - 18 "UPDATE OR ABORT t1 SET a=10, b=5" {} - 19 "UPDATE OR ABORT t1 SET a=10 WHERE b=5" {} - 20 "UPDATE OR ABORT t1 SET b=5,a=10 WHERE 1" {} - 21 "UPDATE OR ABORT main.t1 SET a=10" {} - 22 "UPDATE OR ABORT main.t1 SET a=10, b=5" {} - 23 "UPDATE OR ABORT main.t1 SET a=10 WHERE b=5" {} - 24 "UPDATE OR ABORT main.t1 SET b=5,a=10 WHERE 1" {} - 25 "UPDATE OR REPLACE t1 SET a=10" {} - 26 "UPDATE OR REPLACE t1 SET a=10, b=5" {} - 27 "UPDATE OR REPLACE t1 SET a=10 WHERE b=5" {} - 28 "UPDATE OR REPLACE t1 SET b=5,a=10 WHERE 1" {} - 29 "UPDATE OR REPLACE main.t1 SET a=10" {} - 30 "UPDATE OR REPLACE main.t1 SET a=10, b=5" {} - 31 "UPDATE OR REPLACE main.t1 SET a=10 WHERE b=5" {} - 32 "UPDATE OR REPLACE main.t1 SET b=5,a=10 WHERE 1" {} - 33 "UPDATE OR FAIL t1 SET a=10" {} - 34 "UPDATE OR FAIL t1 SET a=10, b=5" {} - 35 "UPDATE OR FAIL t1 SET a=10 WHERE b=5" {} - 36 "UPDATE OR FAIL t1 SET b=5,a=10 WHERE 1" {} - 37 "UPDATE OR FAIL main.t1 SET a=10" {} - 38 "UPDATE OR FAIL main.t1 SET a=10, b=5" {} - 39 "UPDATE OR FAIL main.t1 SET a=10 WHERE b=5" {} - 40 "UPDATE OR FAIL main.t1 SET b=5,a=10 WHERE 1" {} - 41 "UPDATE OR IGNORE t1 SET a=10" {} - 42 "UPDATE OR IGNORE t1 SET a=10, b=5" {} - 43 "UPDATE OR IGNORE t1 SET a=10 WHERE b=5" {} - 44 "UPDATE OR IGNORE t1 SET b=5,a=10 WHERE 1" {} - 45 "UPDATE OR IGNORE main.t1 SET a=10" {} - 46 "UPDATE OR IGNORE main.t1 SET a=10, b=5" {} - 47 "UPDATE OR IGNORE main.t1 SET a=10 WHERE b=5" {} - 48 "UPDATE OR IGNORE main.t1 SET b=5,a=10 WHERE 1" {} -} - -# EVIDENCE-OF: R-38515-45264 An UPDATE statement is used to modify a -# subset of the values stored in zero or more rows of the database table -# identified by the qualified-table-name specified as part of the UPDATE -# statement. -# -# Test cases e_update-1.1.1.* test the "identified by the -# qualified-table-name" part of the statement above. Tests -# e_update-1.1.2.* show that the "zero or more rows" part is -# accurate. -# -do_execsql_test e_update-1.1.0 { - INSERT INTO main.t1 VALUES(1, 'i'); - INSERT INTO main.t1 VALUES(2, 'ii'); - INSERT INTO main.t1 VALUES(3, 'iii'); - - INSERT INTO aux.t1 VALUES(1, 'I'); - INSERT INTO aux.t1 VALUES(2, 'II'); - INSERT INTO aux.t1 VALUES(3, 'III'); -} {} -do_update_tests e_update-1.1 { - 1.1 "UPDATE t1 SET a = a+1; SELECT * FROM t1" {2 i 3 ii 4 iii} - 1.2 "UPDATE main.t1 SET a = a+1; SELECT * FROM main.t1" {3 i 4 ii 5 iii} - 1.3 "UPDATE aux.t1 SET a = a+1; SELECT * FROM aux.t1" {2 I 3 II 4 III} - - 2.1 "UPDATE t1 SET a = a+1 WHERE a = 1; SELECT * FROM t1" {3 i 4 ii 5 iii} - 2.2 "UPDATE t1 SET a = a+1 WHERE a = 4; SELECT * FROM t1" {3 i 5 ii 5 iii} -} - -# EVIDENCE-OF: R-55869-30521 If the UPDATE statement does not have a -# WHERE clause, all rows in the table are modified by the UPDATE. -# -do_execsql_test e_update-1.2.0 { - DELETE FROM main.t1; - INSERT INTO main.t1 VALUES(1, 'i'); - INSERT INTO main.t1 VALUES(2, 'ii'); - INSERT INTO main.t1 VALUES(3, 'iii'); -} {} -do_update_tests e_update-1.2 { - 1 "UPDATE t1 SET b = 'roman' ; SELECT * FROM t1" - {1 roman 2 roman 3 roman} - - 2 "UPDATE t1 SET a = 'greek' ; SELECT * FROM t1" - {greek roman greek roman greek roman} -} - -# EVIDENCE-OF: R-42117-40023 Otherwise, the UPDATE affects only those -# rows for which the result of evaluating the WHERE clause expression as -# a boolean expression is true. -# -do_execsql_test e_update-1.3.0 { - DELETE FROM main.t1; - INSERT INTO main.t1 VALUES(NULL, ''); - INSERT INTO main.t1 VALUES(1, 'i'); - INSERT INTO main.t1 VALUES(2, 'ii'); - INSERT INTO main.t1 VALUES(3, 'iii'); -} {} -do_update_tests e_update-1.3 { - 1 "UPDATE t1 SET b = 'roman' WHERE a<2 ; SELECT * FROM t1" - {{} {} 1 roman 2 ii 3 iii} - - 2 "UPDATE t1 SET b = 'egyptian' WHERE (a-3)/10.0 ; SELECT * FROM t1" - {{} {} 1 egyptian 2 egyptian 3 iii} - - 3 "UPDATE t1 SET b = 'macedonian' WHERE a; SELECT * FROM t1" - {{} {} 1 macedonian 2 macedonian 3 macedonian} - - 4 "UPDATE t1 SET b = 'lithuanian' WHERE a IS NULL; SELECT * FROM t1" - {{} lithuanian 1 macedonian 2 macedonian 3 macedonian} -} - -# EVIDENCE-OF: R-58129-20729 It is not an error if the WHERE clause does -# not evaluate to true for any row in the table - this just means that -# the UPDATE statement affects zero rows. -# -do_execsql_test e_update-1.4.0 { - DELETE FROM main.t1; - INSERT INTO main.t1 VALUES(NULL, ''); - INSERT INTO main.t1 VALUES(1, 'i'); - INSERT INTO main.t1 VALUES(2, 'ii'); - INSERT INTO main.t1 VALUES(3, 'iii'); -} {} -do_update_tests e_update-1.4 -query { - SELECT * FROM t1 -} { - 1 "UPDATE t1 SET b = 'burmese' WHERE a=5" {{} {} 1 i 2 ii 3 iii} - - 2 "UPDATE t1 SET b = 'burmese' WHERE length(b)<1 AND a IS NOT NULL" - {{} {} 1 i 2 ii 3 iii} - - 3 "UPDATE t1 SET b = 'burmese' WHERE 0" {{} {} 1 i 2 ii 3 iii} - - 4 "UPDATE t1 SET b = 'burmese' WHERE (SELECT a FROM t1 WHERE rowid=1)" - {{} {} 1 i 2 ii 3 iii} -} - -# EVIDENCE-OF: R-40598-36595 For each affected row, the named columns -# are set to the values found by evaluating the corresponding scalar -# expressions. -# -# EVIDENCE-OF: R-40472-60438 Columns that do not appear in the list of -# assignments are left unmodified. -# -do_execsql_test e_update-1.5.0 { - INSERT INTO t2(rowid, a, b, c) VALUES(1, 3, 1, 4); - INSERT INTO t2(rowid, a, b, c) VALUES(2, 1, 5, 9); - INSERT INTO t2(rowid, a, b, c) VALUES(3, 2, 6, 5); -} {} -do_update_tests e_update-1.5 -query { - SELECT * FROM t2 -} { - 1 "UPDATE t2 SET c = 1+1 WHERE a=2" - {3 1 4 1 5 9 2 6 2} - - 2 "UPDATE t2 SET b = 4/2, c=CAST((0.4*5) AS INTEGER) WHERE a<3" - {3 1 4 1 2 2 2 2 2} - - 3 "UPDATE t2 SET a = 1" - {1 1 4 1 2 2 1 2 2} - - 4 "UPDATE t2 SET b = (SELECT count(*)+2 FROM t2), c = 24/3+1 WHERE rowid=2" - {1 1 4 1 5 9 1 2 2} - - 5 "UPDATE t2 SET a = 3 WHERE c = 4" - {3 1 4 1 5 9 1 2 2} - - 6 "UPDATE t2 SET a = b WHERE rowid>2" - {3 1 4 1 5 9 2 2 2} - - 6 "UPDATE t2 SET b=6, c=5 WHERE a=b AND b=c" - {3 1 4 1 5 9 2 6 5} -} - -# EVIDENCE-OF: R-34751-18293 If a single column-name appears more than -# once in the list of assignment expressions, all but the rightmost -# occurrence is ignored. -# -do_update_tests e_update-1.6 -query { - SELECT * FROM t2 -} { - 1 "UPDATE t2 SET c=5, c=6, c=7 WHERE rowid=1" {3 1 7 1 5 9 2 6 5} - 2 "UPDATE t2 SET c=7, c=6, c=5 WHERE rowid=1" {3 1 5 1 5 9 2 6 5} - 3 "UPDATE t2 SET c=5, b=6, c=7 WHERE rowid=1" {3 6 7 1 5 9 2 6 5} -} - -# EVIDENCE-OF: R-36239-04077 The scalar expressions may refer to columns -# of the row being updated. -# -# EVIDENCE-OF: R-04558-24451 In this case all scalar expressions are -# evaluated before any assignments are made. -# -do_execsql_test e_update-1.7.0 { - DELETE FROM t2; - INSERT INTO t2(rowid, a, b, c) VALUES(1, 3, 1, 4); - INSERT INTO t2(rowid, a, b, c) VALUES(2, 1, 5, 9); - INSERT INTO t2(rowid, a, b, c) VALUES(3, 2, 6, 5); -} {} -do_update_tests e_update-1.7 -query { - SELECT * FROM t2 -} { - 1 "UPDATE t2 SET a=b+c" {5 1 4 14 5 9 11 6 5} - 2 "UPDATE t2 SET a=b, b=a" {1 5 4 5 14 9 6 11 5} - 3 "UPDATE t2 SET a=c||c, c=NULL" {44 5 {} 99 14 {} 55 11 {}} -} - -# EVIDENCE-OF: R-12619-24112 The optional conflict-clause allows the -# user to nominate a specific constraint conflict resolution algorithm -# to use during this one UPDATE command. -# -do_execsql_test e_update-1.8.0 { - DELETE FROM t3; - INSERT INTO t3 VALUES(1, 'one'); - INSERT INTO t3 VALUES(2, 'two'); - INSERT INTO t3 VALUES(3, 'three'); - INSERT INTO t3 VALUES(4, 'four'); -} {} -foreach {tn sql error ac data } { - 1 "UPDATE t3 SET b='one' WHERE a=3" - {column b is not unique} 1 {1 one 2 two 3 three 4 four} - - 2 "UPDATE OR REPLACE t3 SET b='one' WHERE a=3" - {} 1 {2 two 3 one 4 four} - - 3 "UPDATE OR FAIL t3 SET b='three'" - {column b is not unique} 1 {2 three 3 one 4 four} - - 4 "UPDATE OR IGNORE t3 SET b='three' WHERE a=3" - {} 1 {2 three 3 one 4 four} - - 5 "UPDATE OR ABORT t3 SET b='three' WHERE a=3" - {column b is not unique} 1 {2 three 3 one 4 four} - - 6 "BEGIN" {} 0 {2 three 3 one 4 four} - - 7 "UPDATE t3 SET b='three' WHERE a=3" - {column b is not unique} 0 {2 three 3 one 4 four} - - 8 "UPDATE OR ABORT t3 SET b='three' WHERE a=3" - {column b is not unique} 0 {2 three 3 one 4 four} - - 9 "UPDATE OR FAIL t3 SET b='two'" - {column b is not unique} 0 {2 two 3 one 4 four} - - 10 "UPDATE OR IGNORE t3 SET b='four' WHERE a=3" - {} 0 {2 two 3 one 4 four} - - 11 "UPDATE OR REPLACE t3 SET b='four' WHERE a=3" - {} 0 {2 two 3 four} - - 12 "UPDATE OR ROLLBACK t3 SET b='four'" - {column b is not unique} 1 {2 three 3 one 4 four} -} { - do_catchsql_test e_update-1.8.$tn.1 $sql [list [expr {$error!=""}] $error] - do_execsql_test e_update-1.8.$tn.2 {SELECT * FROM t3} [list {*}$data] - do_test e_update-1.8.$tn.3 {sqlite3_get_autocommit db} $ac -} - - - -# EVIDENCE-OF: R-12123-54095 The table-name specified as part of an -# UPDATE statement within a trigger body must be unqualified. -# -# EVIDENCE-OF: R-09690-36749 In other words, the database-name. prefix -# on the table name of the UPDATE is not allowed within triggers. -# -do_update_tests e_update-2.1 -error { - qualified table names are not allowed on INSERT, UPDATE, and DELETE statements within triggers -} { - 1 { - CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN - UPDATE main.t2 SET a=1, b=2, c=3; - END; - } {} - - 2 { - CREATE TRIGGER tr1 BEFORE UPDATE ON t2 BEGIN - UPDATE aux.t1 SET a=1, b=2; - END; - } {} - - 3 { - CREATE TRIGGER tr1 AFTER DELETE ON t4 BEGIN - UPDATE main.t1 SET a=1, b=2; - END; - } {} -} - -# EVIDENCE-OF: R-06085-13761 Unless the table to which the trigger is -# attached is in the TEMP database, the table being updated by the -# trigger program must reside in the same database as it. -# -do_update_tests e_update-2.2 -error { - no such table: %s -} { - 1 { - CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN - UPDATE t4 SET x=x+1; - END; - INSERT INTO t1 VALUES(1, 2); - } "main.t4" - - 2 { - CREATE TRIGGER aux.tr1 AFTER INSERT ON t5 BEGIN - UPDATE t4 SET x=x+1; - END; - INSERT INTO t5 VALUES(1, 2); - } "aux.t4" -} -do_execsql_test e_update-2.2.X { - DROP TRIGGER tr1; - DROP TRIGGER aux.tr1; -} {} - -# EVIDENCE-OF: R-29512-54644 If the table to which the trigger is -# attached is in the TEMP database, then the unqualified name of the -# table being updated is resolved in the same way as it is for a -# top-level statement (by searching first the TEMP database, then the -# main database, then any other databases in the order they were -# attached). -# -do_execsql_test e_update-2.3.0 { - SELECT 'main', tbl_name FROM main.sqlite_master WHERE type = 'table'; - SELECT 'temp', tbl_name FROM sqlite_temp_master WHERE type = 'table'; - SELECT 'aux', tbl_name FROM aux.sqlite_master WHERE type = 'table'; -} [list {*}{ - main t1 - main t2 - main t3 - main t6 - temp t4 - temp t6 - aux t1 - aux t5 -}] -do_execsql_test e_update-2.3.1 { - DELETE FROM main.t6; - DELETE FROM temp.t6; - INSERT INTO main.t6 VALUES(1, 2); - INSERT INTO temp.t6 VALUES(1, 2); - - CREATE TRIGGER temp.tr1 AFTER INSERT ON t4 BEGIN - UPDATE t6 SET x=x+1; - END; - - INSERT INTO t4 VALUES(1, 2); - SELECT * FROM main.t6; - SELECT * FROM temp.t6; -} {1 2 2 2} -do_execsql_test e_update-2.3.2 { - DELETE FROM main.t1; - DELETE FROM aux.t1; - INSERT INTO main.t1 VALUES(1, 2); - INSERT INTO aux.t1 VALUES(1, 2); - - CREATE TRIGGER temp.tr2 AFTER DELETE ON t4 BEGIN - UPDATE t1 SET a=a+1; - END; - - DELETE FROM t4; - SELECT * FROM main.t1; - SELECT * FROM aux.t1; -} {2 2 1 2} -do_execsql_test e_update-2.3.3 { - DELETE FROM aux.t5; - INSERT INTO aux.t5 VALUES(1, 2); - - INSERT INTO t4 VALUES('x', 'y'); - CREATE TRIGGER temp.tr3 AFTER UPDATE ON t4 BEGIN - UPDATE t5 SET a=a+1; - END; - - UPDATE t4 SET x=10; - SELECT * FROM aux.t5; -} {2 2} - -# EVIDENCE-OF: R-19619-42762 The INDEXED BY and NOT INDEXED clauses are -# not allowed on UPDATE statements within triggers. -# -do_update_tests e_update-2.4 -error { - the %s %s clause is not allowed on UPDATE or DELETE statements within triggers -} { - 1 { - CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN - UPDATE t1 INDEXED BY i1 SET a=a+1; - END; - } {INDEXED BY} - - 2 { - CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN - UPDATE t1 NOT INDEXED SET a=a+1; - END; - } {NOT INDEXED} -} - -ifcapable update_delete_limit { - -# EVIDENCE-OF: R-57359-59558 The LIMIT and ORDER BY clauses for UPDATE -# are unsupported within triggers, regardless of the compilation options -# used to build SQLite. -# -do_update_tests e_update-2.5 -error { - near "%s": syntax error -} { - 1 { - CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN - UPDATE t1 SET a=a+1 LIMIT 10; - END; - } {LIMIT} - - 2 { - CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN - UPDATE t1 SET a=a+1 ORDER BY a LIMIT 10; - END; - } {ORDER} - - 3 { - CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN - UPDATE t1 SET a=a+1 ORDER BY a LIMIT 10 OFFSET 2; - END; - } {ORDER} - - 4 { - CREATE TRIGGER tr1 AFTER INSERT ON t2 BEGIN - UPDATE t1 SET a=a+1 LIMIT 10 OFFSET 2; - END; - } {LIMIT} -} - -# EVIDENCE-OF: R-59581-44104 If SQLite is built with the -# SQLITE_ENABLE_UPDATE_DELETE_LIMIT compile-time option then the syntax -# of the UPDATE statement is extended with optional ORDER BY and LIMIT -# clauses -# -# -- syntax diagram update-stmt-limited -# -do_update_tests e_update-3.0 { - 1 "UPDATE t1 SET a=b LIMIT 5" {} - 2 "UPDATE t1 SET a=b LIMIT 5-1 OFFSET 2+2" {} - 3 "UPDATE t1 SET a=b LIMIT 2+2, 16/4" {} - 4 "UPDATE t1 SET a=b ORDER BY a LIMIT 5" {} - 5 "UPDATE t1 SET a=b ORDER BY a LIMIT 5-1 OFFSET 2+2" {} - 6 "UPDATE t1 SET a=b ORDER BY a LIMIT 2+2, 16/4" {} - 7 "UPDATE t1 SET a=b WHERE a>2 LIMIT 5" {} - 8 "UPDATE t1 SET a=b WHERE a>2 LIMIT 5-1 OFFSET 2+2" {} - 9 "UPDATE t1 SET a=b WHERE a>2 LIMIT 2+2, 16/4" {} - 10 "UPDATE t1 SET a=b WHERE a>2 ORDER BY a LIMIT 5" {} - 11 "UPDATE t1 SET a=b WHERE a>2 ORDER BY a LIMIT 5-1 OFFSET 2+2" {} - 12 "UPDATE t1 SET a=b WHERE a>2 ORDER BY a LIMIT 2+2, 16/4" {} -} - -do_execsql_test e_update-3.1.0 { - CREATE TABLE t7(q, r, s); - INSERT INTO t7 VALUES(1, 'one', 'X'); - INSERT INTO t7 VALUES(2, 'two', 'X'); - INSERT INTO t7 VALUES(3, 'three', 'X'); - INSERT INTO t7 VALUES(4, 'four', 'X'); - INSERT INTO t7 VALUES(5, 'five', 'X'); - INSERT INTO t7 VALUES(6, 'six', 'X'); - INSERT INTO t7 VALUES(7, 'seven', 'X'); - INSERT INTO t7 VALUES(8, 'eight', 'X'); - INSERT INTO t7 VALUES(9, 'nine', 'X'); - INSERT INTO t7 VALUES(10, 'ten', 'X'); -} {} - -# EVIDENCE-OF: R-58862-44169 If an UPDATE statement has a LIMIT clause, -# the maximum number of rows that will be updated is found by evaluating -# the accompanying expression and casting it to an integer value. -# -do_update_tests e_update-3.1 -query { SELECT s FROM t7 } { - 1 "UPDATE t7 SET s = q LIMIT 5" {1 2 3 4 5 X X X X X} - 2 "UPDATE t7 SET s = r WHERE q>2 LIMIT 4" {1 2 three four five six X X X X} - 3 "UPDATE t7 SET s = q LIMIT 0" {1 2 three four five six X X X X} -} - -# EVIDENCE-OF: R-63582-45120 A negative value is interpreted as "no limit". -# -do_update_tests e_update-3.2 -query { SELECT s FROM t7 } { - 1 "UPDATE t7 SET s = q LIMIT -1" {1 2 3 4 5 6 7 8 9 10} - 2 "UPDATE t7 SET s = r WHERE q>4 LIMIT -1" - {1 2 3 4 five six seven eight nine ten} - 3 "UPDATE t7 SET s = 'X' LIMIT -1" {X X X X X X X X X X} -} - -# EVIDENCE-OF: R-18628-11938 If the LIMIT expression evaluates to -# non-negative value N and the UPDATE statement has an ORDER BY clause, -# then all rows that would be updated in the absence of the LIMIT clause -# are sorted according to the ORDER BY and the first N updated. -# -do_update_tests e_update-3.3 -query { SELECT s FROM t7 } { - 1 "UPDATE t7 SET s = q ORDER BY r LIMIT 3" {X X X 4 5 X X 8 X X} - 2 "UPDATE t7 SET s = r ORDER BY r DESC LIMIT 2" {X two three 4 5 X X 8 X X} - 3 "UPDATE t7 SET s = q ORDER BY q DESC LIMIT 5" {X two three 4 5 6 7 8 9 10} - - X "UPDATE t7 SET s = 'X'" {X X X X X X X X X X} -} - -# EVIDENCE-OF: R-30955-38324 If the UPDATE statement also has an OFFSET -# clause, then it is similarly evaluated and cast to an integer value. -# If the OFFSET expression evaluates to a non-negative value M, then the -# first M rows are skipped and the following N rows updated instead. -# -do_update_tests e_update-3.3 -query { SELECT s FROM t7 } { - 1 "UPDATE t7 SET s = q ORDER BY q LIMIT 3 OFFSET 2" {X X 3 4 5 X X X X X} - 2 "UPDATE t7 SET s = q ORDER BY q DESC LIMIT 2, 3 " {X X 3 4 5 6 7 8 X X} - - X "UPDATE t7 SET s = 'X'" {X X X X X X X X X X} -} - -# EVIDENCE-OF: R-19486-35828 If the UPDATE statement has no ORDER BY -# clause, then all rows that would be updated in the absence of the -# LIMIT clause are assembled in an arbitrary order before applying the -# LIMIT and OFFSET clauses to determine which are actually updated. -# -# In practice, "arbitrary order" is rowid order. This is also tested -# by e_update-3.2.* above. -# -do_update_tests e_update-3.4 -query { SELECT s FROM t7 } { - 1 "UPDATE t7 SET s = q LIMIT 4, 2" {X X X X 5 6 X X X X} - 2 "UPDATE t7 SET s = q LIMIT 2 OFFSET 7" {X X X X 5 6 X 8 9 X} -} - -# EVIDENCE-OF: R-10927-26133 The ORDER BY clause on an UPDATE statement -# is used only to determine which rows fall within the LIMIT. The order -# in which rows are modified is arbitrary and is not influenced by the -# ORDER BY clause. -# -do_execsql_test e_update-3.5.0 { - CREATE TABLE t8(x); - CREATE TRIGGER tr7 BEFORE UPDATE ON t7 BEGIN - INSERT INTO t8 VALUES(old.q); - END; -} {} -do_update_tests e_update-3.5 -query { SELECT x FROM t8 ; DELETE FROM t8 } { - 1 "UPDATE t7 SET s = q ORDER BY r LIMIT -1" {1 2 3 4 5 6 7 8 9 10} - 2 "UPDATE t7 SET s = q ORDER BY r ASC LIMIT -1" {1 2 3 4 5 6 7 8 9 10} - 3 "UPDATE t7 SET s = q ORDER BY r DESC LIMIT -1" {1 2 3 4 5 6 7 8 9 10} - 4 "UPDATE t7 SET s = q ORDER BY q DESC LIMIT 5" {6 7 8 9 10} -} - - -} ;# ifcapable update_delete_limit - -finish_test |
