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|    1 # 2001 September 15 |  | 
|    2 # |  | 
|    3 # The author disclaims copyright to this source code.  In place of |  | 
|    4 # a legal notice, here is a blessing: |  | 
|    5 # |  | 
|    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. |  | 
|    9 # |  | 
|   10 #*********************************************************************** |  | 
|   11 # This file implements regression tests for SQLite library.  The |  | 
|   12 # focus of this file is testing the DELETE FROM statement. |  | 
|   13 # |  | 
|   14 # $Id: delete.test,v 1.26 2009/06/05 17:09:12 drh Exp $ |  | 
|   15  |  | 
|   16 set testdir [file dirname $argv0] |  | 
|   17 source $testdir/tester.tcl |  | 
|   18  |  | 
|   19 # Try to delete from a non-existant table. |  | 
|   20 # |  | 
|   21 do_test delete-1.1 { |  | 
|   22   set v [catch {execsql {DELETE FROM test1}} msg] |  | 
|   23   lappend v $msg |  | 
|   24 } {1 {no such table: test1}} |  | 
|   25  |  | 
|   26 # Try to delete from sqlite_master |  | 
|   27 # |  | 
|   28 do_test delete-2.1 { |  | 
|   29   set v [catch {execsql {DELETE FROM sqlite_master}} msg] |  | 
|   30   lappend v $msg |  | 
|   31 } {1 {table sqlite_master may not be modified}} |  | 
|   32  |  | 
|   33 # Delete selected entries from a table with and without an index. |  | 
|   34 # |  | 
|   35 do_test delete-3.1.1 { |  | 
|   36   execsql {CREATE TABLE table1(f1 int, f2 int)} |  | 
|   37   execsql {INSERT INTO table1 VALUES(1,2)} |  | 
|   38   execsql {INSERT INTO table1 VALUES(2,4)} |  | 
|   39   execsql {INSERT INTO table1 VALUES(3,8)} |  | 
|   40   execsql {INSERT INTO table1 VALUES(4,16)} |  | 
|   41   execsql {SELECT * FROM table1 ORDER BY f1} |  | 
|   42 } {1 2 2 4 3 8 4 16} |  | 
|   43 do_test delete-3.1.2 { |  | 
|   44   execsql {DELETE FROM table1 WHERE f1=3} |  | 
|   45 } {} |  | 
|   46 do_test delete-3.1.3 { |  | 
|   47   execsql {SELECT * FROM table1 ORDER BY f1} |  | 
|   48 } {1 2 2 4 4 16} |  | 
|   49 do_test delete-3.1.4 { |  | 
|   50   execsql {CREATE INDEX index1 ON table1(f1)} |  | 
|   51   execsql {PRAGMA count_changes=on} |  | 
|   52   ifcapable explain { |  | 
|   53     execsql {EXPLAIN DELETE FROM table1 WHERE f1=3} |  | 
|   54   } |  | 
|   55   execsql {DELETE FROM 'table1' WHERE f1=3} |  | 
|   56 } {0} |  | 
|   57 do_test delete-3.1.5 { |  | 
|   58   execsql {SELECT * FROM table1 ORDER BY f1} |  | 
|   59 } {1 2 2 4 4 16} |  | 
|   60 do_test delete-3.1.6.1 { |  | 
|   61   execsql {DELETE FROM table1 WHERE f1=2} |  | 
|   62 } {1} |  | 
|   63 do_test delete-3.1.6.2 { |  | 
|   64   db changes |  | 
|   65 } 1 |  | 
|   66 do_test delete-3.1.7 { |  | 
|   67   execsql {SELECT * FROM table1 ORDER BY f1} |  | 
|   68 } {1 2 4 16} |  | 
|   69 integrity_check delete-3.2 |  | 
|   70  |  | 
|   71  |  | 
|   72 # Semantic errors in the WHERE clause |  | 
|   73 # |  | 
|   74 do_test delete-4.1 { |  | 
|   75   execsql {CREATE TABLE table2(f1 int, f2 int)} |  | 
|   76   set v [catch {execsql {DELETE FROM table2 WHERE f3=5}} msg] |  | 
|   77   lappend v $msg |  | 
|   78 } {1 {no such column: f3}} |  | 
|   79  |  | 
|   80 do_test delete-4.2 { |  | 
|   81   set v [catch {execsql {DELETE FROM table2 WHERE xyzzy(f1+4)}} msg] |  | 
|   82   lappend v $msg |  | 
|   83 } {1 {no such function: xyzzy}} |  | 
|   84 integrity_check delete-4.3 |  | 
|   85  |  | 
|   86 # Lots of deletes |  | 
|   87 # |  | 
|   88 do_test delete-5.1.1 { |  | 
|   89   execsql {DELETE FROM table1} |  | 
|   90 } {2} |  | 
|   91 do_test delete-5.1.2 { |  | 
|   92   execsql {SELECT count(*) FROM table1} |  | 
|   93 } {0} |  | 
|   94 do_test delete-5.2.1 { |  | 
|   95   execsql {BEGIN TRANSACTION} |  | 
|   96   for {set i 1} {$i<=200} {incr i} { |  | 
|   97      execsql "INSERT INTO table1 VALUES($i,[expr {$i*$i}])" |  | 
|   98   } |  | 
|   99   execsql {COMMIT} |  | 
|  100   execsql {SELECT count(*) FROM table1} |  | 
|  101 } {200} |  | 
|  102 do_test delete-5.2.2 { |  | 
|  103   execsql {DELETE FROM table1} |  | 
|  104 } {200} |  | 
|  105 do_test delete-5.2.3 { |  | 
|  106   execsql {BEGIN TRANSACTION} |  | 
|  107   for {set i 1} {$i<=200} {incr i} { |  | 
|  108      execsql "INSERT INTO table1 VALUES($i,[expr {$i*$i}])" |  | 
|  109   } |  | 
|  110   execsql {COMMIT} |  | 
|  111   execsql {SELECT count(*) FROM table1} |  | 
|  112 } {200} |  | 
|  113 do_test delete-5.2.4 { |  | 
|  114   execsql {PRAGMA count_changes=off} |  | 
|  115   execsql {DELETE FROM table1} |  | 
|  116 } {} |  | 
|  117 do_test delete-5.2.5 { |  | 
|  118   execsql {SELECT count(*) FROM table1} |  | 
|  119 } {0} |  | 
|  120 do_test delete-5.2.6 { |  | 
|  121   execsql {BEGIN TRANSACTION} |  | 
|  122   for {set i 1} {$i<=200} {incr i} { |  | 
|  123      execsql "INSERT INTO table1 VALUES($i,[expr {$i*$i}])" |  | 
|  124   } |  | 
|  125   execsql {COMMIT} |  | 
|  126   execsql {SELECT count(*) FROM table1} |  | 
|  127 } {200} |  | 
|  128 do_test delete-5.3 { |  | 
|  129   for {set i 1} {$i<=200} {incr i 4} { |  | 
|  130      execsql "DELETE FROM table1 WHERE f1==$i" |  | 
|  131   } |  | 
|  132   execsql {SELECT count(*) FROM table1} |  | 
|  133 } {150} |  | 
|  134 do_test delete-5.4.1 { |  | 
|  135   execsql "DELETE FROM table1 WHERE f1>50" |  | 
|  136   db changes |  | 
|  137 } [db one {SELECT count(*) FROM table1 WHERE f1>50}] |  | 
|  138 do_test delete-5.4.2 { |  | 
|  139   execsql {SELECT count(*) FROM table1} |  | 
|  140 } {37} |  | 
|  141 do_test delete-5.5 { |  | 
|  142   for {set i 1} {$i<=70} {incr i 3} { |  | 
|  143      execsql "DELETE FROM table1 WHERE f1==$i" |  | 
|  144   } |  | 
|  145   execsql {SELECT f1 FROM table1 ORDER BY f1} |  | 
|  146 } {2 3 6 8 11 12 14 15 18 20 23 24 26 27 30 32 35 36 38 39 42 44 47 48 50} |  | 
|  147 do_test delete-5.6 { |  | 
|  148   for {set i 1} {$i<40} {incr i} { |  | 
|  149      execsql "DELETE FROM table1 WHERE f1==$i" |  | 
|  150   } |  | 
|  151   execsql {SELECT f1 FROM table1 ORDER BY f1} |  | 
|  152 } {42 44 47 48 50} |  | 
|  153 do_test delete-5.7 { |  | 
|  154   execsql "DELETE FROM table1 WHERE f1!=48" |  | 
|  155   execsql {SELECT f1 FROM table1 ORDER BY f1} |  | 
|  156 } {48} |  | 
|  157 integrity_check delete-5.8 |  | 
|  158  |  | 
|  159  |  | 
|  160 # Delete large quantities of data.  We want to test the List overflow |  | 
|  161 # mechanism in the vdbe. |  | 
|  162 # |  | 
|  163 do_test delete-6.1 { |  | 
|  164   execsql {BEGIN; DELETE FROM table1} |  | 
|  165   for {set i 1} {$i<=3000} {incr i} { |  | 
|  166     execsql "INSERT INTO table1 VALUES($i,[expr {$i*$i}])" |  | 
|  167   } |  | 
|  168   execsql {DELETE FROM table2} |  | 
|  169   for {set i 1} {$i<=3000} {incr i} { |  | 
|  170     execsql "INSERT INTO table2 VALUES($i,[expr {$i*$i}])" |  | 
|  171   } |  | 
|  172   execsql {COMMIT} |  | 
|  173   execsql {SELECT count(*) FROM table1} |  | 
|  174 } {3000} |  | 
|  175 do_test delete-6.2 { |  | 
|  176   execsql {SELECT count(*) FROM table2} |  | 
|  177 } {3000} |  | 
|  178 do_test delete-6.3 { |  | 
|  179   execsql {SELECT f1 FROM table1 WHERE f1<10 ORDER BY f1} |  | 
|  180 } {1 2 3 4 5 6 7 8 9} |  | 
|  181 do_test delete-6.4 { |  | 
|  182   execsql {SELECT f1 FROM table2 WHERE f1<10 ORDER BY f1} |  | 
|  183 } {1 2 3 4 5 6 7 8 9} |  | 
|  184 do_test delete-6.5.1 { |  | 
|  185   execsql {DELETE FROM table1 WHERE f1>7} |  | 
|  186   db changes |  | 
|  187 } {2993} |  | 
|  188 do_test delete-6.5.2 { |  | 
|  189   execsql {SELECT f1 FROM table1 ORDER BY f1} |  | 
|  190 } {1 2 3 4 5 6 7} |  | 
|  191 do_test delete-6.6 { |  | 
|  192   execsql {DELETE FROM table2 WHERE f1>7} |  | 
|  193   execsql {SELECT f1 FROM table2 ORDER BY f1} |  | 
|  194 } {1 2 3 4 5 6 7} |  | 
|  195 do_test delete-6.7 { |  | 
|  196   execsql {DELETE FROM table1} |  | 
|  197   execsql {SELECT f1 FROM table1} |  | 
|  198 } {} |  | 
|  199 do_test delete-6.8 { |  | 
|  200   execsql {INSERT INTO table1 VALUES(2,3)} |  | 
|  201   execsql {SELECT f1 FROM table1} |  | 
|  202 } {2} |  | 
|  203 do_test delete-6.9 { |  | 
|  204   execsql {DELETE FROM table2} |  | 
|  205   execsql {SELECT f1 FROM table2} |  | 
|  206 } {} |  | 
|  207 do_test delete-6.10 { |  | 
|  208   execsql {INSERT INTO table2 VALUES(2,3)} |  | 
|  209   execsql {SELECT f1 FROM table2} |  | 
|  210 } {2} |  | 
|  211 integrity_check delete-6.11 |  | 
|  212  |  | 
|  213 do_test delete-7.1 { |  | 
|  214   execsql { |  | 
|  215     CREATE TABLE t3(a); |  | 
|  216     INSERT INTO t3 VALUES(1); |  | 
|  217     INSERT INTO t3 SELECT a+1 FROM t3; |  | 
|  218     INSERT INTO t3 SELECT a+2 FROM t3; |  | 
|  219     SELECT * FROM t3; |  | 
|  220   } |  | 
|  221 } {1 2 3 4} |  | 
|  222 ifcapable {trigger} { |  | 
|  223   do_test delete-7.2 { |  | 
|  224     execsql { |  | 
|  225       CREATE TABLE cnt(del); |  | 
|  226       INSERT INTO cnt VALUES(0); |  | 
|  227       CREATE TRIGGER r1 AFTER DELETE ON t3 FOR EACH ROW BEGIN |  | 
|  228         UPDATE cnt SET del=del+1; |  | 
|  229       END; |  | 
|  230       DELETE FROM t3 WHERE a<2; |  | 
|  231       SELECT * FROM t3; |  | 
|  232     } |  | 
|  233   } {2 3 4} |  | 
|  234   do_test delete-7.3 { |  | 
|  235     execsql { |  | 
|  236       SELECT * FROM cnt; |  | 
|  237     } |  | 
|  238   } {1} |  | 
|  239   do_test delete-7.4 { |  | 
|  240     execsql { |  | 
|  241       DELETE FROM t3; |  | 
|  242       SELECT * FROM t3; |  | 
|  243     } |  | 
|  244   } {} |  | 
|  245   do_test delete-7.5 { |  | 
|  246     execsql { |  | 
|  247       SELECT * FROM cnt; |  | 
|  248     } |  | 
|  249   } {4} |  | 
|  250   do_test delete-7.6 { |  | 
|  251     execsql { |  | 
|  252       INSERT INTO t3 VALUES(1); |  | 
|  253       INSERT INTO t3 SELECT a+1 FROM t3; |  | 
|  254       INSERT INTO t3 SELECT a+2 FROM t3; |  | 
|  255       CREATE TABLE t4 AS SELECT * FROM t3; |  | 
|  256       PRAGMA count_changes=ON; |  | 
|  257       DELETE FROM t3; |  | 
|  258       DELETE FROM t4; |  | 
|  259     } |  | 
|  260   } {4 4} |  | 
|  261 } ;# endif trigger |  | 
|  262 ifcapable {!trigger} { |  | 
|  263   execsql {DELETE FROM t3} |  | 
|  264 } |  | 
|  265 integrity_check delete-7.7 |  | 
|  266  |  | 
|  267 # Make sure error messages are consistent when attempting to delete |  | 
|  268 # from a read-only database.  Ticket #304. |  | 
|  269 # |  | 
|  270 do_test delete-8.0 { |  | 
|  271   execsql { |  | 
|  272     PRAGMA count_changes=OFF; |  | 
|  273     INSERT INTO t3 VALUES(123); |  | 
|  274     SELECT * FROM t3; |  | 
|  275   } |  | 
|  276 } {123} |  | 
|  277 db close |  | 
|  278 catch {file delete -force test.db-journal} |  | 
|  279 catch {file attributes test.db -permissions 0444} |  | 
|  280 catch {file attributes test.db -readonly 1} |  | 
|  281 sqlite3 db test.db |  | 
|  282 set ::DB [sqlite3_connection_pointer db] |  | 
|  283 do_test delete-8.1 { |  | 
|  284   catchsql { |  | 
|  285     DELETE FROM t3; |  | 
|  286   } |  | 
|  287 } {1 {attempt to write a readonly database}} |  | 
|  288 do_test delete-8.2 { |  | 
|  289   execsql {SELECT * FROM t3}  |  | 
|  290 } {123} |  | 
|  291 do_test delete-8.3 { |  | 
|  292   catchsql { |  | 
|  293     DELETE FROM t3 WHERE 1; |  | 
|  294   } |  | 
|  295 } {1 {attempt to write a readonly database}} |  | 
|  296 do_test delete-8.4 { |  | 
|  297   execsql {SELECT * FROM t3}  |  | 
|  298 } {123} |  | 
|  299  |  | 
|  300 # Update for v3: In v2 the DELETE statement would succeed because no |  | 
|  301 # database writes actually occur. Version 3 refuses to open a transaction |  | 
|  302 # on a read-only file, so the statement fails. |  | 
|  303 do_test delete-8.5 { |  | 
|  304   catchsql { |  | 
|  305     DELETE FROM t3 WHERE a<100; |  | 
|  306   } |  | 
|  307 # v2 result: {0 {}} |  | 
|  308 } {1 {attempt to write a readonly database}} |  | 
|  309 do_test delete-8.6 { |  | 
|  310   execsql {SELECT * FROM t3} |  | 
|  311 } {123} |  | 
|  312 integrity_check delete-8.7 |  | 
|  313  |  | 
|  314 # Need to do the following for tcl 8.5 on mac. On that configuration, the |  | 
|  315 # -readonly flag is taken so seriously that a subsequent [file delete -force] |  | 
|  316 # (required before the next test file can be executed) will fail. |  | 
|  317 # |  | 
|  318 catch {file attributes test.db -readonly 0} |  | 
|  319 db close |  | 
|  320 file delete -force test.db test.db-journal |  | 
|  321  |  | 
|  322 # The following tests verify that SQLite correctly handles the case |  | 
|  323 # where an index B-Tree is being scanned, the rowid column being read |  | 
|  324 # from each index entry and another statement deletes some rows from |  | 
|  325 # the index B-Tree. At one point this (obscure) scenario was causing  |  | 
|  326 # SQLite to return spurious SQLITE_CORRUPT errors and arguably incorrect |  | 
|  327 # query results.  |  | 
|  328 # |  | 
|  329 do_test delete-9.1 { |  | 
|  330   sqlite3 db test.db |  | 
|  331   execsql { |  | 
|  332     CREATE TABLE t5(a, b); |  | 
|  333     CREATE TABLE t6(c, d); |  | 
|  334     INSERT INTO t5 VALUES(1, 2); |  | 
|  335     INSERT INTO t5 VALUES(3, 4); |  | 
|  336     INSERT INTO t5 VALUES(5, 6); |  | 
|  337     INSERT INTO t6 VALUES('a', 'b'); |  | 
|  338     INSERT INTO t6 VALUES('c', 'd'); |  | 
|  339     CREATE INDEX i5 ON t5(a); |  | 
|  340     CREATE INDEX i6 ON t6(c); |  | 
|  341   } |  | 
|  342 } {} |  | 
|  343 do_test delete-9.2 { |  | 
|  344   set res [list] |  | 
|  345   db eval { SELECT t5.rowid AS r, c, d FROM t5, t6 ORDER BY a } { |  | 
|  346     if {$r==2} { db eval { DELETE FROM t5 } } |  | 
|  347     lappend res $r $c $d |  | 
|  348   } |  | 
|  349   set res |  | 
|  350 } {1 a b 1 c d 2 a b {} c d} |  | 
|  351 do_test delete-9.3 { |  | 
|  352   execsql { |  | 
|  353     INSERT INTO t5 VALUES(1, 2); |  | 
|  354     INSERT INTO t5 VALUES(3, 4); |  | 
|  355     INSERT INTO t5 VALUES(5, 6); |  | 
|  356   } |  | 
|  357   set res [list] |  | 
|  358   db eval { SELECT t5.rowid AS r, c, d FROM t5, t6 ORDER BY a } { |  | 
|  359     if {$r==2} { db eval { DELETE FROM t5 WHERE rowid = 2 } } |  | 
|  360     lappend res $r $c $d |  | 
|  361   } |  | 
|  362   set res |  | 
|  363 } {1 a b 1 c d 2 a b {} c d 3 a b 3 c d} |  | 
|  364 do_test delete-9.4 { |  | 
|  365   execsql { |  | 
|  366     DELETE FROM t5; |  | 
|  367     INSERT INTO t5 VALUES(1, 2); |  | 
|  368     INSERT INTO t5 VALUES(3, 4); |  | 
|  369     INSERT INTO t5 VALUES(5, 6); |  | 
|  370   } |  | 
|  371   set res [list] |  | 
|  372   db eval { SELECT t5.rowid AS r, c, d FROM t5, t6 ORDER BY a } { |  | 
|  373     if {$r==2} { db eval { DELETE FROM t5 WHERE rowid = 1 } } |  | 
|  374     lappend res $r $c $d |  | 
|  375   } |  | 
|  376   set res |  | 
|  377 } {1 a b 1 c d 2 a b 2 c d 3 a b 3 c d} |  | 
|  378 do_test delete-9.5 { |  | 
|  379   execsql { |  | 
|  380     DELETE FROM t5; |  | 
|  381     INSERT INTO t5 VALUES(1, 2); |  | 
|  382     INSERT INTO t5 VALUES(3, 4); |  | 
|  383     INSERT INTO t5 VALUES(5, 6); |  | 
|  384   } |  | 
|  385   set res [list] |  | 
|  386   db eval { SELECT t5.rowid AS r, c, d FROM t5, t6 ORDER BY a } { |  | 
|  387     if {$r==2} { db eval { DELETE FROM t5 WHERE rowid = 3 } } |  | 
|  388     lappend res $r $c $d |  | 
|  389   } |  | 
|  390   set res |  | 
|  391 } {1 a b 1 c d 2 a b 2 c d} |  | 
|  392  |  | 
|  393  |  | 
|  394 finish_test |  | 
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