1# 2006 January 31 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 join reordering optimization 13# in cases that include a LEFT JOIN. 14# 15# $Id: where3.test,v 1.4 2008/04/17 19:14:02 drh Exp $ 16 17set testdir [file dirname $argv0] 18source $testdir/tester.tcl 19 20# The following is from ticket #1652. 21# 22# A comma join then a left outer join: A,B left join C. 23# Arrange indices so that the B table is chosen to go first. 24# Also put an index on C, but make sure that A is chosen before C. 25# 26do_test where3-1.1 { 27 execsql { 28 CREATE TABLE t1(a, b); 29 CREATE TABLE t2(p, q); 30 CREATE TABLE t3(x, y); 31 32 INSERT INTO t1 VALUES(111,'one'); 33 INSERT INTO t1 VALUES(222,'two'); 34 INSERT INTO t1 VALUES(333,'three'); 35 36 INSERT INTO t2 VALUES(1,111); 37 INSERT INTO t2 VALUES(2,222); 38 INSERT INTO t2 VALUES(4,444); 39 CREATE INDEX t2i1 ON t2(p); 40 41 INSERT INTO t3 VALUES(999,'nine'); 42 CREATE INDEX t3i1 ON t3(x); 43 44 SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x WHERE p=2 AND a=q; 45 } 46} {222 two 2 222 {} {}} 47 48ifcapable explain&&!cursorhints { 49 do_test where3-1.1.1 { 50 explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON q=x 51 WHERE p=2 AND a=q} 52 } [explain_no_trace {SELECT * FROM t1, t2 LEFT JOIN t3 ON x=q 53 WHERE p=2 AND a=q}] 54} 55 56# Ticket #1830 57# 58# This is similar to the above but with the LEFT JOIN on the 59# other side. 60# 61do_test where3-1.2 { 62 execsql { 63 CREATE TABLE parent1(parent1key, child1key, Child2key, child3key); 64 CREATE TABLE child1 ( child1key NVARCHAR, value NVARCHAR ); 65 CREATE UNIQUE INDEX PKIDXChild1 ON child1 ( child1key ); 66 CREATE TABLE child2 ( child2key NVARCHAR, value NVARCHAR ); 67 68 INSERT INTO parent1(parent1key,child1key,child2key) 69 VALUES ( 1, 'C1.1', 'C2.1' ); 70 INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.1', 'Value for C1.1' ); 71 INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.1', 'Value for C2.1' ); 72 73 INSERT INTO parent1 ( parent1key, child1key, child2key ) 74 VALUES ( 2, 'C1.2', 'C2.2' ); 75 INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.2', 'Value for C2.2' ); 76 77 INSERT INTO parent1 ( parent1key, child1key, child2key ) 78 VALUES ( 3, 'C1.3', 'C2.3' ); 79 INSERT INTO child1 ( child1key, value ) VALUES ( 'C1.3', 'Value for C1.3' ); 80 INSERT INTO child2 ( child2key, value ) VALUES ( 'C2.3', 'Value for C2.3' ); 81 82 SELECT parent1.parent1key, child1.value, child2.value 83 FROM parent1 84 LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key 85 INNER JOIN child2 ON child2.child2key = parent1.child2key; 86 } 87} {1 {Value for C1.1} {Value for C2.1} 2 {} {Value for C2.2} 3 {Value for C1.3} {Value for C2.3}} 88 89ifcapable explain&&!cursorhints { 90 do_test where3-1.2.1 { 91 explain_no_trace { 92 SELECT parent1.parent1key, child1.value, child2.value 93 FROM parent1 94 LEFT OUTER JOIN child1 ON child1.child1key = parent1.child1key 95 INNER JOIN child2 ON child2.child2key = parent1.child2key; 96 } 97 } [explain_no_trace { 98 SELECT parent1.parent1key, child1.value, child2.value 99 FROM parent1 100 LEFT OUTER JOIN child1 ON parent1.child1key = child1.child1key 101 INNER JOIN child2 ON child2.child2key = parent1.child2key; 102 }] 103} 104 105# This procedure executes the SQL. Then it appends 106# the names of the table and index used 107# 108proc queryplan {sql} { 109 set ::sqlite_sort_count 0 110 set data [execsql $sql] 111 set eqp [execsql "EXPLAIN QUERY PLAN $sql"] 112 # puts eqp=$eqp 113 foreach {a b c x} $eqp { 114 if {[regexp { TABLE (\w+ AS )?(\w+) USING.* INDEX (\w+)\y} \ 115 $x all as tab idx]} { 116 lappend data $tab $idx 117 } elseif {[regexp { TABLE (\w+ AS )?(\w+)\y} $x all as tab]} { 118 lappend data $tab * 119 } 120 } 121 return $data 122} 123 124 125# If you have a from clause of the form: A B C left join D 126# then make sure the query optimizer is able to reorder the 127# A B C part anyway it wants. 128# 129# Following the fix to ticket #1652, there was a time when 130# the C table would not reorder. So the following reorderings 131# were possible: 132# 133# A B C left join D 134# B A C left join D 135# 136# But these reorders were not allowed 137# 138# C A B left join D 139# A C B left join D 140# C B A left join D 141# B C A left join D 142# 143# The following tests are here to verify that the latter four 144# reorderings are allowed again. 145# 146do_test where3-2.1 { 147 execsql { 148 CREATE TABLE tA(apk integer primary key, ax); 149 CREATE TABLE tB(bpk integer primary key, bx); 150 CREATE TABLE tC(cpk integer primary key, cx); 151 CREATE TABLE tD(dpk integer primary key, dx); 152 } 153 queryplan { 154 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 155 WHERE cpk=bx AND bpk=ax 156 } 157} {tA * tB * tC * tD *} 158do_test where3-2.1.1 { 159 queryplan { 160 SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk 161 WHERE cpk=bx AND bpk=ax 162 } 163} {tA * tB * tC * tD *} 164do_test where3-2.1.2 { 165 queryplan { 166 SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk 167 WHERE bx=cpk AND bpk=ax 168 } 169} {tA * tB * tC * tD *} 170do_test where3-2.1.3 { 171 queryplan { 172 SELECT * FROM tA, tB, tC LEFT JOIN tD ON cx=dpk 173 WHERE bx=cpk AND ax=bpk 174 } 175} {tA * tB * tC * tD *} 176do_test where3-2.1.4 { 177 queryplan { 178 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 179 WHERE bx=cpk AND ax=bpk 180 } 181} {tA * tB * tC * tD *} 182do_test where3-2.1.5 { 183 queryplan { 184 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 185 WHERE cpk=bx AND ax=bpk 186 } 187} {tA * tB * tC * tD *} 188do_test where3-2.2 { 189 queryplan { 190 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 191 WHERE cpk=bx AND apk=bx 192 } 193} {tB * tA * tC * tD *} 194do_test where3-2.3 { 195 queryplan { 196 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 197 WHERE cpk=bx AND apk=bx 198 } 199} {tB * tA * tC * tD *} 200do_test where3-2.4 { 201 queryplan { 202 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 203 WHERE apk=cx AND bpk=ax 204 } 205} {tC * tA * tB * tD *} 206do_test where3-2.5 { 207 queryplan { 208 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 209 WHERE cpk=ax AND bpk=cx 210 } 211} {tA * tC * tB * tD *} 212do_test where3-2.6 { 213 queryplan { 214 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 215 WHERE bpk=cx AND apk=bx 216 } 217} {tC * tB * tA * tD *} 218do_test where3-2.7 { 219 queryplan { 220 SELECT * FROM tA, tB, tC LEFT JOIN tD ON dpk=cx 221 WHERE cpk=bx AND apk=cx 222 } 223} {tB * tC * tA * tD *} 224 225# Ticket [13f033c865f878953] 226# If the outer loop must be a full table scan, do not let ANALYZE trick 227# the planner into use a table for the outer loop that might be indexable 228# if held until an inner loop. 229# 230do_execsql_test where3-3.0 { 231 CREATE TABLE t301(a INTEGER PRIMARY KEY,b,c); 232 CREATE INDEX t301c ON t301(c); 233 INSERT INTO t301 VALUES(1,2,3); 234 INSERT INTO t301 VALUES(2,2,3); 235 CREATE TABLE t302(x, y); 236 INSERT INTO t302 VALUES(4,5); 237 ANALYZE; 238 explain query plan SELECT * FROM t302, t301 WHERE t302.x=5 AND t301.a=t302.y; 239} { 240 0 0 0 {SCAN TABLE t302} 241 0 1 1 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?)} 242} 243do_execsql_test where3-3.1 { 244 explain query plan 245 SELECT * FROM t301, t302 WHERE t302.x=5 AND t301.a=t302.y; 246} { 247 0 0 1 {SCAN TABLE t302} 248 0 1 0 {SEARCH TABLE t301 USING INTEGER PRIMARY KEY (rowid=?)} 249} 250do_execsql_test where3-3.2 { 251 SELECT * FROM t301 WHERE c=3 AND a IS NULL; 252} {} 253do_execsql_test where3-3.3 { 254 SELECT * FROM t301 WHERE c=3 AND a IS NOT NULL; 255} {1 2 3 2 2 3} 256 257if 0 { # Query planner no longer does this 258# Verify that when there are multiple tables in a join which must be 259# full table scans that the query planner attempts put the table with 260# the fewest number of output rows as the outer loop. 261# 262do_execsql_test where3-4.0 { 263 CREATE TABLE t400(a INTEGER PRIMARY KEY, b, c); 264 CREATE TABLE t401(p INTEGER PRIMARY KEY, q, r); 265 CREATE TABLE t402(x INTEGER PRIMARY KEY, y, z); 266 EXPLAIN QUERY PLAN 267 SELECT * FROM t400, t401, t402 WHERE t402.z GLOB 'abc*'; 268} { 269 0 0 2 {SCAN TABLE t402} 270 0 1 0 {SCAN TABLE t400} 271 0 2 1 {SCAN TABLE t401} 272} 273do_execsql_test where3-4.1 { 274 EXPLAIN QUERY PLAN 275 SELECT * FROM t400, t401, t402 WHERE t401.r GLOB 'abc*'; 276} { 277 0 0 1 {SCAN TABLE t401} 278 0 1 0 {SCAN TABLE t400} 279 0 2 2 {SCAN TABLE t402} 280} 281do_execsql_test where3-4.2 { 282 EXPLAIN QUERY PLAN 283 SELECT * FROM t400, t401, t402 WHERE t400.c GLOB 'abc*'; 284} { 285 0 0 0 {SCAN TABLE t400} 286 0 1 1 {SCAN TABLE t401} 287 0 2 2 {SCAN TABLE t402} 288} 289} ;# endif 290 291# Verify that a performance regression encountered by firefox 292# has been fixed. 293# 294do_execsql_test where3-5.0 { 295 CREATE TABLE aaa (id INTEGER PRIMARY KEY, type INTEGER, 296 fk INTEGER DEFAULT NULL, parent INTEGER, 297 position INTEGER, title LONGVARCHAR, 298 keyword_id INTEGER, folder_type TEXT, 299 dateAdded INTEGER, lastModified INTEGER); 300 CREATE INDEX aaa_111 ON aaa (fk, type); 301 CREATE INDEX aaa_222 ON aaa (parent, position); 302 CREATE INDEX aaa_333 ON aaa (fk, lastModified); 303 CREATE TABLE bbb (id INTEGER PRIMARY KEY, type INTEGER, 304 fk INTEGER DEFAULT NULL, parent INTEGER, 305 position INTEGER, title LONGVARCHAR, 306 keyword_id INTEGER, folder_type TEXT, 307 dateAdded INTEGER, lastModified INTEGER); 308 CREATE INDEX bbb_111 ON bbb (fk, type); 309 CREATE INDEX bbb_222 ON bbb (parent, position); 310 CREATE INDEX bbb_333 ON bbb (fk, lastModified); 311 312 EXPLAIN QUERY PLAN 313 SELECT bbb.title AS tag_title 314 FROM aaa JOIN bbb ON bbb.id = aaa.parent 315 WHERE aaa.fk = 'constant' 316 AND LENGTH(bbb.title) > 0 317 AND bbb.parent = 4 318 ORDER BY bbb.title COLLATE NOCASE ASC; 319} { 320 0 0 0 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?)} 321 0 1 1 {SEARCH TABLE bbb USING INTEGER PRIMARY KEY (rowid=?)} 322 0 0 0 {USE TEMP B-TREE FOR ORDER BY} 323} 324do_execsql_test where3-5.1 { 325 EXPLAIN QUERY PLAN 326 SELECT bbb.title AS tag_title 327 FROM aaa JOIN aaa AS bbb ON bbb.id = aaa.parent 328 WHERE aaa.fk = 'constant' 329 AND LENGTH(bbb.title) > 0 330 AND bbb.parent = 4 331 ORDER BY bbb.title COLLATE NOCASE ASC; 332} { 333 0 0 0 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?)} 334 0 1 1 {SEARCH TABLE aaa AS bbb USING INTEGER PRIMARY KEY (rowid=?)} 335 0 0 0 {USE TEMP B-TREE FOR ORDER BY} 336} 337do_execsql_test where3-5.2 { 338 EXPLAIN QUERY PLAN 339 SELECT bbb.title AS tag_title 340 FROM bbb JOIN aaa ON bbb.id = aaa.parent 341 WHERE aaa.fk = 'constant' 342 AND LENGTH(bbb.title) > 0 343 AND bbb.parent = 4 344 ORDER BY bbb.title COLLATE NOCASE ASC; 345} { 346 0 0 1 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?)} 347 0 1 0 {SEARCH TABLE bbb USING INTEGER PRIMARY KEY (rowid=?)} 348 0 0 0 {USE TEMP B-TREE FOR ORDER BY} 349} 350do_execsql_test where3-5.3 { 351 EXPLAIN QUERY PLAN 352 SELECT bbb.title AS tag_title 353 FROM aaa AS bbb JOIN aaa ON bbb.id = aaa.parent 354 WHERE aaa.fk = 'constant' 355 AND LENGTH(bbb.title) > 0 356 AND bbb.parent = 4 357 ORDER BY bbb.title COLLATE NOCASE ASC; 358} { 359 0 0 1 {SEARCH TABLE aaa USING INDEX aaa_333 (fk=?)} 360 0 1 0 {SEARCH TABLE aaa AS bbb USING INTEGER PRIMARY KEY (rowid=?)} 361 0 0 0 {USE TEMP B-TREE FOR ORDER BY} 362} 363 364# Name resolution with NATURAL JOIN and USING 365# 366do_test where3-6.setup { 367 db eval { 368 CREATE TABLE t6w(a, w); 369 INSERT INTO t6w VALUES(1, 'w-one'); 370 INSERT INTO t6w VALUES(2, 'w-two'); 371 INSERT INTO t6w VALUES(9, 'w-nine'); 372 CREATE TABLE t6x(a, x); 373 INSERT INTO t6x VALUES(1, 'x-one'); 374 INSERT INTO t6x VALUES(3, 'x-three'); 375 INSERT INTO t6x VALUES(9, 'x-nine'); 376 CREATE TABLE t6y(a, y); 377 INSERT INTO t6y VALUES(1, 'y-one'); 378 INSERT INTO t6y VALUES(4, 'y-four'); 379 INSERT INTO t6y VALUES(9, 'y-nine'); 380 CREATE TABLE t6z(a, z); 381 INSERT INTO t6z VALUES(1, 'z-one'); 382 INSERT INTO t6z VALUES(5, 'z-five'); 383 INSERT INTO t6z VALUES(9, 'z-nine'); 384 } 385} {} 386set cnt 0 387foreach predicate { 388 {} 389 {ORDER BY a} 390 {ORDER BY t6w.a} 391 {WHERE a>0} 392 {WHERE t6y.a>0} 393 {WHERE a>0 ORDER BY a} 394} { 395 incr cnt 396 do_test where3-6.$cnt.1 { 397 set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y" 398 append sql " NATURAL JOIN t6z " 399 append sql $::predicate 400 db eval $sql 401 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 402 do_test where3-6.$cnt.2 { 403 set sql "SELECT * FROM t6w JOIN t6x USING(a) JOIN t6y USING(a)" 404 append sql " JOIN t6z USING(a) " 405 append sql $::predicate 406 db eval $sql 407 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 408 do_test where3-6.$cnt.3 { 409 set sql "SELECT * FROM t6w NATURAL JOIN t6x JOIN t6y USING(a)" 410 append sql " JOIN t6z USING(a) " 411 append sql $::predicate 412 db eval $sql 413 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 414 do_test where3-6.$cnt.4 { 415 set sql "SELECT * FROM t6w JOIN t6x USING(a) NATURAL JOIN t6y" 416 append sql " JOIN t6z USING(a) " 417 append sql $::predicate 418 db eval $sql 419 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 420 do_test where3-6.$cnt.5 { 421 set sql "SELECT * FROM t6w JOIN t6x USING(a) JOIN t6y USING(a)" 422 append sql " NATURAL JOIN t6z " 423 append sql $::predicate 424 db eval $sql 425 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 426 do_test where3-6.$cnt.6 { 427 set sql "SELECT * FROM t6w JOIN t6x USING(a) NATURAL JOIN t6y" 428 append sql " NATURAL JOIN t6z " 429 append sql $::predicate 430 db eval $sql 431 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 432 do_test where3-6.$cnt.7 { 433 set sql "SELECT * FROM t6w NATURAL JOIN t6x JOIN t6y USING(a)" 434 append sql " NATURAL JOIN t6z " 435 append sql $::predicate 436 db eval $sql 437 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 438 do_test where3-6.$cnt.8 { 439 set sql "SELECT * FROM t6w NATURAL JOIN t6x NATURAL JOIN t6y" 440 append sql " JOIN t6z USING(a) " 441 append sql $::predicate 442 db eval $sql 443 } {1 w-one x-one y-one z-one 9 w-nine x-nine y-nine z-nine} 444} 445 446do_execsql_test where3-7-setup { 447 CREATE TABLE t71(x1 INTEGER PRIMARY KEY, y1); 448 CREATE TABLE t72(x2 INTEGER PRIMARY KEY, y2); 449 CREATE TABLE t73(x3, y3); 450 CREATE TABLE t74(x4, y4); 451 INSERT INTO t71 VALUES(123,234); 452 INSERT INTO t72 VALUES(234,345); 453 INSERT INTO t73 VALUES(123,234); 454 INSERT INTO t74 VALUES(234,345); 455 INSERT INTO t74 VALUES(234,678); 456} {} 457foreach disabled_opt {none omit-noop-join all} { 458 optimization_control db all 1 459 optimization_control db $disabled_opt 0 460 do_execsql_test where3-7.$disabled_opt.1 { 461 SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1; 462 } {123} 463 do_execsql_test where3-7.$disabled_opt.2 { 464 SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 WHERE y2 IS NULL; 465 } {} 466 do_execsql_test where3-7.$disabled_opt.3 { 467 SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 WHERE y2 IS NOT NULL; 468 } {123} 469 do_execsql_test where3-7.$disabled_opt.4 { 470 SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 AND y2 IS NULL; 471 } {123} 472 do_execsql_test where3-7.$disabled_opt.5 { 473 SELECT x1 FROM t71 LEFT JOIN t72 ON x2=y1 AND y2 IS NOT NULL; 474 } {123} 475 do_execsql_test where3-7.$disabled_opt.6 { 476 SELECT x3 FROM t73 LEFT JOIN t72 ON x2=y3; 477 } {123} 478 do_execsql_test where3-7.$disabled_opt.7 { 479 SELECT DISTINCT x3 FROM t73 LEFT JOIN t72 ON x2=y3; 480 } {123} 481 do_execsql_test where3-7.$disabled_opt.8 { 482 SELECT x3 FROM t73 LEFT JOIN t74 ON x4=y3; 483 } {123 123} 484 do_execsql_test where3-7.$disabled_opt.9 { 485 SELECT DISTINCT x3 FROM t73 LEFT JOIN t74 ON x4=y3; 486 } {123} 487} 488 489 490finish_test 491