| # 2016-05-20 |
| # |
| # 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 regression tests for SQLite library. The |
| # focus of this file is testing the LIMIT in combination with ORDER BY |
| # and in particular, the optimizations in the inner loop that cause an |
| # early exit of the inner loop when the LIMIT is reached and the inner |
| # loop is emitting rows in ORDER BY order. |
| |
| |
| set testdir [file dirname $argv0] |
| source $testdir/tester.tcl |
| set testprefix limit2 |
| |
| do_execsql_test limit2-100 { |
| CREATE TABLE t1(a,b); |
| WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<1000) |
| INSERT INTO t1(a,b) SELECT 1, (x*17)%1000 + 1000 FROM c; |
| INSERT INTO t1(a,b) VALUES(2,2),(3,1006),(4,4),(5,9999); |
| CREATE INDEX t1ab ON t1(a,b); |
| } |
| set sqlite_search_count 0 |
| do_execsql_test limit2-100.1 { |
| SELECT a, b, '|' FROM t1 WHERE a IN (2,4,5,3,1) ORDER BY b LIMIT 5; |
| } {2 2 | 4 4 | 1 1000 | 1 1001 | 1 1002 |} |
| set fast_count $sqlite_search_count |
| set sqlite_search_count 0 |
| do_execsql_test limit2-100.2 { |
| SELECT a, b, '|' FROM t1 WHERE a IN (2,4,5,3,1) ORDER BY +b LIMIT 5; |
| } {2 2 | 4 4 | 1 1000 | 1 1001 | 1 1002 |} |
| do_test limit2-100.3 { |
| set slow_count $sqlite_search_count |
| expr {$fast_count < 0.02*$slow_count} |
| } {1} |
| |
| do_execsql_test limit2-110 { |
| CREATE TABLE t2(x,y); |
| INSERT INTO t2(x,y) VALUES('a',1),('a',2),('a',3),('a',4); |
| INSERT INTO t2(x,y) VALUES('b',1),('c',2),('d',3),('e',4); |
| CREATE INDEX t2xy ON t2(x,y); |
| } |
| set sqlite_search_count 0 |
| do_execsql_test limit2-110.1 { |
| SELECT a, b, '|' FROM t2, t1 WHERE t2.x='a' AND t1.a=t2.y ORDER BY t1.b LIMIT 5; |
| } {2 2 | 4 4 | 1 1000 | 1 1001 | 1 1002 |} |
| set fast_count $sqlite_search_count |
| set sqlite_search_count 0 |
| do_execsql_test limit2-110.2 { |
| SELECT a, b, '|' FROM t2, t1 WHERE t2.x='a' AND t1.a=t2.y ORDER BY +t1.b LIMIT 5; |
| } {2 2 | 4 4 | 1 1000 | 1 1001 | 1 1002 |} |
| set slow_count $sqlite_search_count |
| do_test limit2-110.3 { |
| expr {$fast_count < 0.02*$slow_count} |
| } {1} |
| |
| do_execsql_test limit2-120 { |
| DROP INDEX t1ab; |
| CREATE INDEX t1ab ON t1(a,b DESC); |
| } |
| set sqlite_search_count 0 |
| do_execsql_test limit2-120.1 { |
| SELECT a, b, '|' FROM t1 WHERE a IN (2,4,5,3,1) ORDER BY b DESC LIMIT 5; |
| } {5 9999 | 1 1999 | 1 1998 | 1 1997 | 1 1996 |} |
| set fast_count $sqlite_search_count |
| set sqlite_search_count 0 |
| do_execsql_test limit2-120.2 { |
| SELECT a, b, '|' FROM t1 WHERE a IN (2,4,5,3,1) ORDER BY +b DESC LIMIT 5; |
| } {5 9999 | 1 1999 | 1 1998 | 1 1997 | 1 1996 |} |
| do_test limit2-120.3 { |
| set slow_count $sqlite_search_count |
| expr {$fast_count < 0.02*$slow_count} |
| } {1} |
| |
| # Bug report against the new ORDER BY LIMIT optimization just prior to |
| # release. (Unreleased so there is no ticket). |
| # |
| # Make sure the optimization is not applied if the inner loop can only |
| # provide a single row of output. |
| # |
| do_execsql_test limit2-200 { |
| CREATE TABLE t200(a, b); |
| WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<1000) |
| INSERT INTO t200(a,b) SELECT x, x FROM c; |
| CREATE TABLE t201(x INTEGER PRIMARY KEY, y); |
| INSERT INTO t201(x,y) VALUES(2,12345); |
| |
| SELECT *, '|' FROM t200, t201 WHERE x=b ORDER BY y LIMIT 3; |
| } {2 2 2 12345 |} |
| do_execsql_test limit2-210 { |
| SELECT *, '|' FROM t200 LEFT JOIN t201 ON x=b ORDER BY y LIMIT 3; |
| } {1 1 {} {} | 3 3 {} {} | 4 4 {} {} |} |
| |
| # Bug in the ORDER BY LIMIT optimization reported on 2016-09-06. |
| # Ticket https://www.sqlite.org/src/info/559733b09e96 |
| # |
| do_execsql_test limit2-300 { |
| CREATE TABLE t300(a,b,c); |
| CREATE INDEX t300x ON t300(a,b,c); |
| INSERT INTO t300 VALUES(0,1,99),(0,1,0),(0,0,0); |
| SELECT *,'.' FROM t300 WHERE a=0 AND (c=0 OR c=99) ORDER BY c DESC; |
| } {0 1 99 . 0 0 0 . 0 1 0 .} |
| do_execsql_test limit2-310 { |
| SELECT *,'.' FROM t300 WHERE a=0 AND (c=0 OR c=99) ORDER BY c DESC LIMIT 1; |
| } {0 1 99 .} |
| |
| # Make sure the SELECT loop is ordered correctly for the direction of |
| # the ORDER BY |
| # |
| do_execsql_test limit2-400 { |
| CREATE TABLE t400(a,b); |
| CREATE INDEX t400_ab ON t400(a,b); |
| INSERT INTO t400(a,b) VALUES(1,90),(1,40),(2,80),(2,30),(3,70),(3,20); |
| SELECT *,'x' FROM t400 WHERE a IN (1,2,3) ORDER BY b DESC LIMIT 3; |
| SELECT *,'y' FROM t400 WHERE a IN (1,2,3) ORDER BY +b DESC LIMIT 3; |
| } {1 90 x 2 80 x 3 70 x 1 90 y 2 80 y 3 70 y} |
| |
| |
| do_execsql_test 500 { |
| CREATE TABLE t500(i INTEGER PRIMARY KEY, j); |
| INSERT INTO t500 VALUES(1, 1); |
| INSERT INTO t500 VALUES(2, 2); |
| INSERT INTO t500 VALUES(3, 3); |
| INSERT INTO t500 VALUES(4, 0); |
| INSERT INTO t500 VALUES(5, 5); |
| SELECT j FROM t500 WHERE i IN (1,2,3,4,5) ORDER BY j DESC LIMIT 3; |
| } {5 3 2} |
| do_execsql_test 501 { |
| CREATE TABLE t501(i INTEGER PRIMARY KEY, j); |
| INSERT INTO t501 VALUES(1, 5); |
| INSERT INTO t501 VALUES(2, 4); |
| INSERT INTO t501 VALUES(3, 3); |
| INSERT INTO t501 VALUES(4, 6); |
| INSERT INTO t501 VALUES(5, 1); |
| SELECT j FROM t501 WHERE i IN (1,2,3,4,5) ORDER BY j LIMIT 3; |
| } {1 3 4} |
| do_execsql_test 502 { |
| CREATE TABLE t502(i INT PRIMARY KEY, j); |
| INSERT INTO t502 VALUES(1, 5); |
| INSERT INTO t502 VALUES(2, 4); |
| INSERT INTO t502 VALUES(3, 3); |
| INSERT INTO t502 VALUES(4, 6); |
| INSERT INTO t502 VALUES(5, 1); |
| SELECT j FROM t502 WHERE i IN (1,2,3,4,5) ORDER BY j LIMIT 3; |
| } {1 3 4} |
| |
| # Ticket https://www.sqlite.org/src/info/123c9ba32130a6c9 2017-12-13 |
| # Incorrect result when an idnex is used for an ordered join. |
| # |
| # This test case is in the limit2.test module because the problem was first |
| # exposed by check-in https://www.sqlite.org/src/info/559733b09e which |
| # implemented the ORDER BY LIMIT optimization that limit2.test strives to |
| # test. |
| # |
| do_execsql_test 600 { |
| DROP TABLE IF EXISTS t1; |
| CREATE TABLE t1(a, b); INSERT INTO t1 VALUES(1,2); |
| DROP TABLE IF EXISTS t2; |
| CREATE TABLE t2(x, y); INSERT INTO t2 VALUES(1,3); |
| CREATE INDEX t1ab ON t1(a,b); |
| SELECT y FROM t1, t2 WHERE a=x AND b<=y ORDER BY b DESC; |
| } {3} |
| |
| # Ticket https://www.sqlite.org/src/info/9936b2fa443fec03 2018-09-08 |
| # Infinite loop due to the ORDER BY LIMIT optimization. |
| # |
| do_execsql_test 700 { |
| DROP TABLE IF EXISTS t1; |
| DROP TABLE IF EXISTS t2; |
| CREATE TABLE t1(aa VARCHAR PRIMARY KEY NOT NULL,bb,cc,x VARCHAR(400)); |
| INSERT INTO t1(aa,bb,cc) VALUES('maroon','meal','lecture'); |
| INSERT INTO t1(aa,bb,cc) VALUES('reality','meal','catsear'); |
| CREATE TABLE t2(aa VARCHAR PRIMARY KEY, dd INT DEFAULT 1, ee, x VARCHAR(100)); |
| INSERT INTO t2(aa,dd,ee) VALUES('maroon',0,'travel'),('reality',0,'hour'); |
| CREATE INDEX t2x1 ON t2(dd,ee); |
| ANALYZE; |
| DROP TABLE IF EXISTS sqlite_stat4; |
| DELETE FROM sqlite_stat1; |
| INSERT INTO sqlite_stat1 VALUES |
| ('t2','t2x1','3 3 3'), |
| ('t2','sqlite_autoindex_t2_1','3 1'), |
| ('t1','sqlite_autoindex_t1_1','2 1'); |
| ANALYZE sqlite_master; |
| SELECT * |
| FROM t1 LEFT JOIN t2 ON t1.aa=t2.aa |
| WHERE t1.bb='meal' |
| ORDER BY t2.dd DESC |
| LIMIT 1; |
| } {maroon meal lecture {} maroon 0 travel {}} |
| do_execsql_test 710 { |
| DROP TABLE t1; |
| DROP TABLE t2; |
| CREATE TABLE t1(aa, bb); |
| INSERT INTO t1 VALUES('maroon','meal'); |
| CREATE TABLE t2(cc, dd, ee, x VARCHAR(100)); |
| INSERT INTO t2(cc,dd,ee) VALUES('maroon',1,'one'); |
| INSERT INTO t2(cc,dd,ee) VALUES('maroon',2,'two'); |
| INSERT INTO t2(cc,dd,ee) VALUES('maroon',0,'zero'); |
| CREATE INDEX t2ddee ON t2(dd,ee); |
| CREATE INDEX t2cc ON t2(cc); |
| ANALYZE; |
| SELECT t2.cc, t2.dd, t2.ee FROM t1 CROSS JOIN t2 ON t1.aa=t2.cc |
| ORDER BY t2.dd LIMIT 1; |
| } {maroon 0 zero} |
| do_execsql_test 720 { |
| SELECT t2.cc, t2.dd, t2.ee FROM t1 CROSS JOIN t2 ON t1.aa=t2.cc |
| WHERE t1.bb='meal' |
| ORDER BY t2.dd LIMIT 1; |
| } {maroon 0 zero} |
| |
| finish_test |