path: root/test/sort.test

# 2001 September 15.
#
# 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 sorter (code in vdbesort.c).
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix sort
db close
sqlite3_shutdown
sqlite3_config_pmasz 10
sqlite3_initialize
sqlite3 db test.db

# Create a bunch of data to sort against
#
do_test sort-1.0 {
  execsql {
    CREATE TABLE t1(
       n int,
       v varchar(10),
       log int,
       roman varchar(10),
       flt real
    );
    INSERT INTO t1 VALUES(1,'one',0,'I',3.141592653);
    INSERT INTO t1 VALUES(2,'two',1,'II',2.15);
    INSERT INTO t1 VALUES(3,'three',1,'III',4221.0);
    INSERT INTO t1 VALUES(4,'four',2,'IV',-0.0013442);
    INSERT INTO t1 VALUES(5,'five',2,'V',-11);
    INSERT INTO t1 VALUES(6,'six',2,'VI',0.123);
    INSERT INTO t1 VALUES(7,'seven',2,'VII',123.0);
    INSERT INTO t1 VALUES(8,'eight',3,'VIII',-1.6);
  }
  execsql {SELECT count(*) FROM t1}
} {8}

do_test sort-1.1 {
  execsql {SELECT n FROM t1 ORDER BY n}
} {1 2 3 4 5 6 7 8}
do_test sort-1.1.1 {
  execsql {SELECT n FROM t1 ORDER BY n ASC}
} {1 2 3 4 5 6 7 8}
do_test sort-1.1.1 {
  execsql {SELECT ALL n FROM t1 ORDER BY n ASC}
} {1 2 3 4 5 6 7 8}
do_test sort-1.2 {
  execsql {SELECT n FROM t1 ORDER BY n DESC}
} {8 7 6 5 4 3 2 1}
do_test sort-1.3a {
  execsql {SELECT v FROM t1 ORDER BY v}
} {eight five four one seven six three two}
do_test sort-1.3b {
  execsql {SELECT n FROM t1 ORDER BY v}
} {8 5 4 1 7 6 3 2}
do_test sort-1.4 {
  execsql {SELECT n FROM t1 ORDER BY v DESC}
} {2 3 6 7 1 4 5 8}
do_test sort-1.5 {
  execsql {SELECT flt FROM t1 ORDER BY flt}
} {-11.0 -1.6 -0.0013442 0.123 2.15 3.141592653 123.0 4221.0}
do_test sort-1.6 {
  execsql {SELECT flt FROM t1 ORDER BY flt DESC}
} {4221.0 123.0 3.141592653 2.15 0.123 -0.0013442 -1.6 -11.0}
do_test sort-1.7 {
  execsql {SELECT roman FROM t1 ORDER BY roman}
} {I II III IV V VI VII VIII}
do_test sort-1.8 {
  execsql {SELECT n FROM t1 ORDER BY log, flt}
} {1 2 3 5 4 6 7 8}
do_test sort-1.8.1 {
  execsql {SELECT n FROM t1 ORDER BY log asc, flt}
} {1 2 3 5 4 6 7 8}
do_test sort-1.8.2 {
  execsql {SELECT n FROM t1 ORDER BY log, flt ASC}
} {1 2 3 5 4 6 7 8}
do_test sort-1.8.3 {
  execsql {SELECT n FROM t1 ORDER BY log ASC, flt asc}
} {1 2 3 5 4 6 7 8}
do_test sort-1.9 {
  execsql {SELECT n FROM t1 ORDER BY log, flt DESC}
} {1 3 2 7 6 4 5 8}
do_test sort-1.9.1 {
  execsql {SELECT n FROM t1 ORDER BY log ASC, flt DESC}
} {1 3 2 7 6 4 5 8}
do_test sort-1.10 {
  execsql {SELECT n FROM t1 ORDER BY log DESC, flt}
} {8 5 4 6 7 2 3 1}
do_test sort-1.11 {
  execsql {SELECT n FROM t1 ORDER BY log DESC, flt DESC}
} {8 7 6 4 5 3 2 1}

# These tests are designed to reach some hard-to-reach places
# inside the string comparison routines.
#
# (Later) The sorting behavior changed in 2.7.0.  But we will
# keep these tests.  You can never have too many test cases!
#
do_test sort-2.1.1 {
  execsql {
    UPDATE t1 SET v='x' || -flt;
    UPDATE t1 SET v='x-2b' where v=='x-0.123';
    SELECT v FROM t1 ORDER BY v;
  }
} {x-123.0 x-2.15 x-2b x-3.141592653 x-4221.0 x0.0013442 x1.6 x11.0}
do_test sort-2.1.2 {
  execsql {
    SELECT v FROM t1 ORDER BY substr(v,2,999);
  }
} {x-123.0 x-2.15 x-2b x-3.141592653 x-4221.0 x0.0013442 x1.6 x11.0}
do_test sort-2.1.3 {
  execsql {
    SELECT v FROM t1 ORDER BY substr(v,2,999)+0.0;
  }
} {x-4221.0 x-123.0 x-3.141592653 x-2.15 x-2b x0.0013442 x1.6 x11.0}
do_test sort-2.1.4 {
  execsql {
    SELECT v FROM t1 ORDER BY substr(v,2,999) DESC;
  }
} {x11.0 x1.6 x0.0013442 x-4221.0 x-3.141592653 x-2b x-2.15 x-123.0}
do_test sort-2.1.5 {
  execsql {
    SELECT v FROM t1 ORDER BY substr(v,2,999)+0.0 DESC;
  }
} {x11.0 x1.6 x0.0013442 x-2b x-2.15 x-3.141592653 x-123.0 x-4221.0}

# This is a bug fix for 2.2.4.
# Strings are normally mapped to upper-case for a caseless comparison.
# But this can cause problems for characters in between 'Z' and 'a'.
#
do_test sort-3.1 {
  execsql {
    CREATE TABLE t2(a,b);
    INSERT INTO t2 VALUES('AGLIENTU',1);
    INSERT INTO t2 VALUES('AGLIE`',2);
    INSERT INTO t2 VALUES('AGNA',3);
    SELECT a, b FROM t2 ORDER BY a;
  }
} {AGLIENTU 1 AGLIE` 2 AGNA 3}
do_test sort-3.2 {
  execsql {
    SELECT a, b FROM t2 ORDER BY a DESC;
  }
} {AGNA 3 AGLIE` 2 AGLIENTU 1}
do_test sort-3.3 {
  execsql {
    DELETE FROM t2;
    INSERT INTO t2 VALUES('aglientu',1);
    INSERT INTO t2 VALUES('aglie`',2);
    INSERT INTO t2 VALUES('agna',3);
    SELECT a, b FROM t2 ORDER BY a;
  }
} {aglie` 2 aglientu 1 agna 3}
do_test sort-3.4 {
  execsql {
    SELECT a, b FROM t2 ORDER BY a DESC;
  }
} {agna 3 aglientu 1 aglie` 2}

# Version 2.7.0 testing.
#
do_test sort-4.1 {
  execsql {
    INSERT INTO t1 VALUES(9,'x2.7',3,'IX',4.0e5);
    INSERT INTO t1 VALUES(10,'x5.0e10',3,'X',-4.0e5);
    INSERT INTO t1 VALUES(11,'x-4.0e9',3,'XI',4.1e4);
    INSERT INTO t1 VALUES(12,'x01234567890123456789',3,'XII',-4.2e3);
    SELECT n FROM t1 ORDER BY n;
  }
} {1 2 3 4 5 6 7 8 9 10 11 12}
do_test sort-4.2 {
  execsql {
    SELECT n||'' FROM t1 ORDER BY 1;
  }
} {1 10 11 12 2 3 4 5 6 7 8 9}
do_test sort-4.3 {
  execsql {
    SELECT n+0 FROM t1 ORDER BY 1;
  }
} {1 2 3 4 5 6 7 8 9 10 11 12}
do_test sort-4.4 {
  execsql {
    SELECT n||'' FROM t1 ORDER BY 1 DESC;
  }
} {9 8 7 6 5 4 3 2 12 11 10 1}
do_test sort-4.5 {
  execsql {
    SELECT n+0 FROM t1 ORDER BY 1 DESC;
  }
} {12 11 10 9 8 7 6 5 4 3 2 1}
do_test sort-4.6 {
  execsql {
    SELECT v FROM t1 ORDER BY 1;
  }
} {x-123.0 x-2.15 x-2b x-3.141592653 x-4.0e9 x-4221.0 x0.0013442 x01234567890123456789 x1.6 x11.0 x2.7 x5.0e10}
do_test sort-4.7 {
  execsql {
    SELECT v FROM t1 ORDER BY 1 DESC;
  }
} {x5.0e10 x2.7 x11.0 x1.6 x01234567890123456789 x0.0013442 x-4221.0 x-4.0e9 x-3.141592653 x-2b x-2.15 x-123.0}
do_test sort-4.8 {
  execsql {
    SELECT substr(v,2,99) FROM t1 ORDER BY 1;
  }
} {-123.0 -2.15 -2b -3.141592653 -4.0e9 -4221.0 0.0013442 01234567890123456789 1.6 11.0 2.7 5.0e10}
#do_test sort-4.9 {
#  execsql {
#    SELECT substr(v,2,99)+0.0 FROM t1 ORDER BY 1;
#  }
#} {-4000000000 -4221 -123 -3.141592653 -2.15 -2 0.0013442 1.6 2.7 11 50000000000 1.23456789012346e+18}

do_test sort-5.1 {
  execsql {
    create table t3(a,b);
    insert into t3 values(5,NULL);
    insert into t3 values(6,NULL);
    insert into t3 values(3,NULL);
    insert into t3 values(4,'cd');
    insert into t3 values(1,'ab');
    insert into t3 values(2,NULL);
    select a from t3 order by b, a;
  }
} {2 3 5 6 1 4}
do_test sort-5.2 {
  execsql {
    select a from t3 order by b, a desc;
  }
} {6 5 3 2 1 4}
do_test sort-5.3 {
  execsql {
    select a from t3 order by b desc, a;
  }
} {4 1 2 3 5 6}
do_test sort-5.4 {
  execsql {
    select a from t3 order by b desc, a desc;
  }
} {4 1 6 5 3 2}

do_test sort-6.1 {
  execsql {
    create index i3 on t3(b,a);
    select a from t3 order by b, a;
  }
} {2 3 5 6 1 4}
do_test sort-6.2 {
  execsql {
    select a from t3 order by b, a desc;
  }
} {6 5 3 2 1 4}
do_test sort-6.3 {
  execsql {
    select a from t3 order by b desc, a;
  }
} {4 1 2 3 5 6}
do_test sort-6.4 {
  execsql {
    select a from t3 order by b desc, a desc;
  }
} {4 1 6 5 3 2}

do_test sort-7.1 {
  execsql {
    CREATE TABLE t4(
      a INTEGER,
      b VARCHAR(30)
    );
    INSERT INTO t4 VALUES(1,1);
    INSERT INTO t4 VALUES(2,2);
    INSERT INTO t4 VALUES(11,11);
    INSERT INTO t4 VALUES(12,12);
    SELECT a FROM t4 ORDER BY 1;
  }
} {1 2 11 12}
do_test sort-7.2 {
  execsql {
    SELECT b FROM t4 ORDER BY 1
  }
} {1 11 12 2}

# Omit tests sort-7.3 to sort-7.8 if view support was disabled at
# compilatation time.
ifcapable view {
do_test sort-7.3 {
  execsql {
    CREATE VIEW v4 AS SELECT * FROM t4;
    SELECT a FROM v4 ORDER BY 1;
  }
} {1 2 11 12}
do_test sort-7.4 {
  execsql {
    SELECT b FROM v4 ORDER BY 1;
  }
} {1 11 12 2}

ifcapable compound {
do_test sort-7.5 {
  execsql {
    SELECT a FROM t4 UNION SELECT a FROM v4 ORDER BY 1;
  }
} {1 2 11 12}
do_test sort-7.6 {
  execsql {
    SELECT b FROM t4 UNION SELECT a FROM v4 ORDER BY 1;
  }
} {1 2 11 12 1 11 12 2}  ;# text from t4.b and numeric from v4.a
do_test sort-7.7 {
  execsql {
    SELECT a FROM t4 UNION SELECT b FROM v4 ORDER BY 1;
  }
} {1 2 11 12 1 11 12 2} ;# numeric from t4.a and text from v4.b
do_test sort-7.8 {
  execsql {
    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1;
  }
} {1 11 12 2}
} ;# ifcapable compound
} ;# ifcapable view

#### Version 3 works differently here:
#do_test sort-7.9 {
#  execsql {
#    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1 COLLATE numeric;
#  }
#} {1 2 11 12}
#do_test sort-7.10 {
#  execsql {
#    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1 COLLATE integer;
#  }
#} {1 2 11 12}
#do_test sort-7.11 {
#  execsql {
#    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1 COLLATE text;
#  }
#} {1 11 12 2}
#do_test sort-7.12 {
#  execsql {
#    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1 COLLATE blob;
#  }
#} {1 11 12 2}
#do_test sort-7.13 {
#  execsql {
#    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1 COLLATE clob;
#  }
#} {1 11 12 2}
#do_test sort-7.14 {
#  execsql {
#    SELECT b FROM t4 UNION SELECT b FROM v4 ORDER BY 1 COLLATE varchar;
#  }
#} {1 11 12 2}

# Ticket #297
#
do_test sort-8.1 {
  execsql {
    CREATE TABLE t5(a real, b text);
    INSERT INTO t5 VALUES(100,'A1');
    INSERT INTO t5 VALUES(100.0,'A2');
    SELECT * FROM t5 ORDER BY a, b;
  }
} {100.0 A1 100.0 A2}


ifcapable {bloblit} {
# BLOBs should sort after TEXT
#
do_test sort-9.1 {
  execsql {
    CREATE TABLE t6(x, y);
    INSERT INTO t6 VALUES(1,1);
    INSERT INTO t6 VALUES(2,'1');
    INSERT INTO t6 VALUES(3,x'31');
    INSERT INTO t6 VALUES(4,NULL);
    SELECT x FROM t6 ORDER BY y;
  }
} {4 1 2 3}
do_test sort-9.2 {
  execsql {
    SELECT x FROM t6 ORDER BY y DESC;
  }
} {3 2 1 4}
do_test sort-9.3 {
  execsql {
    SELECT x FROM t6 WHERE y<1
  }
} {}
do_test sort-9.4 {
  execsql {
    SELECT x FROM t6 WHERE y<'1'
  }
} {1}
do_test sort-9.5 {
  execsql {
    SELECT x FROM t6 WHERE y<x'31'
  }
} {1 2}
do_test sort-9.6 {
  execsql {
    SELECT x FROM t6 WHERE y>1
  }
} {2 3}
do_test sort-9.7 {
  execsql {
    SELECT x FROM t6 WHERE y>'1'
  }
} {3}
} ;# endif bloblit

# Ticket #1092 - ORDER BY on rowid fields.
do_test sort-10.1 {
  execsql {
    CREATE TABLE t7(c INTEGER PRIMARY KEY);
    INSERT INTO t7 VALUES(1);
    INSERT INTO t7 VALUES(2);
    INSERT INTO t7 VALUES(3);
    INSERT INTO t7 VALUES(4);
  }
} {}
do_test sort-10.2 {
  execsql {
    SELECT c FROM t7 WHERE c<=3 ORDER BY c DESC;
  }
} {3 2 1}
do_test sort-10.3 {
  execsql {
    SELECT c FROM t7 WHERE c<3 ORDER BY c DESC;
  }
} {2 1}

# ticket #1358.  Just because one table in a join gives a unique
# result does not mean they all do.  We cannot disable sorting unless
# all tables in the join give unique results.
#
do_test sort-11.1 {
  execsql {
    create table t8(a unique, b, c);
    insert into t8 values(1,2,3);
    insert into t8 values(2,3,4);
    create table t9(x,y);
    insert into t9 values(2,4);
    insert into t9 values(2,3);
    select y from t8, t9 where a=1 order by a, y;
  }
} {3 4}

# Trouble reported on the mailing list.  Check for overly aggressive
# (which is to say, incorrect) optimization of order-by with a rowid
# in a join.
#
do_test sort-12.1 {
  execsql {
    create table a (id integer primary key);
    create table b (id integer primary key, aId integer, text);
    insert into a values (1);
    insert into b values (2, 1, 'xxx');
    insert into b values (1, 1, 'zzz');
    insert into b values (3, 1, 'yyy');
    select a.id, b.id, b.text from a join b on (a.id = b.aId)
      order by a.id, b.text;
  }
} {1 2 xxx 1 3 yyy 1 1 zzz}

#-------------------------------------------------------------------------
# Check that the sorter in vdbesort.c sorts in a stable fashion.
#
do_execsql_test sort-13.0 {
  CREATE TABLE t10(a, b);
}
do_test sort-13.1 {
  db transaction {
    for {set i 0} {$i < 100000} {incr i} {
      execsql { INSERT INTO t10 VALUES( $i/10, $i%10 ) }
    }
  }
} {}
do_execsql_test sort-13.2 {
  SELECT a, b FROM t10 ORDER BY a;
} [db eval {SELECT a, b FROM t10 ORDER BY a, b}]
do_execsql_test sort-13.3 {
  PRAGMA cache_size = 5;
  SELECT a, b FROM t10 ORDER BY a;
} [db eval {SELECT a, b FROM t10 ORDER BY a, b}]

#-------------------------------------------------------------------------
#
foreach {tn mmap_limit nWorker tmpstore coremutex fakeheap softheaplimit} {
          1          0       3     file      true    false             0
          2          0       3     file      true     true             0
          3          0       0     file      true    false             0
          4    1000000       3     file      true    false             0
          5          0       0   memory     false     true             0
          6          0       0     file     false     true       1000000     
          7          0       0     file     false     true         10000
} {
  db close
  sqlite3_shutdown
  if {$coremutex} {
    sqlite3_config multithread
  } else {
    sqlite3_config singlethread
  }
  sqlite3_initialize
  sorter_test_fakeheap $fakeheap
  sqlite3_soft_heap_limit $softheaplimit

  reset_db
  sqlite3_test_control SQLITE_TESTCTRL_SORTER_MMAP db $mmap_limit
  execsql "PRAGMA temp_store = $tmpstore; PRAGMA threads = $nWorker"
  
  
  set ten [string repeat X 10300]
  set one [string repeat y   200]

  if {$softheaplimit} {
    execsql { PRAGMA cache_size = 20 };
  } else {
    execsql { PRAGMA cache_size = 5 };
  }

  do_execsql_test 15.$tn.1 {
    WITH rr AS (
      SELECT 4, $ten UNION ALL
      SELECT 2, $one UNION ALL
      SELECT 1, $ten UNION ALL
      SELECT 3, $one
    )
    SELECT * FROM rr ORDER BY 1;
  } [list 1 $ten 2 $one 3 $one 4 $ten]

  do_execsql_test 15.$tn.2 {
    CREATE TABLE t1(a);
    INSERT INTO t1 VALUES(4);
    INSERT INTO t1 VALUES(5);
    INSERT INTO t1 VALUES(3);
    INSERT INTO t1 VALUES(2);
    INSERT INTO t1 VALUES(6);
    INSERT INTO t1 VALUES(1);
    CREATE INDEX i1 ON t1(a);
    SELECT * FROM t1 ORDER BY a;
  } {1 2 3 4 5 6}

  do_execsql_test 15.$tn.3 {
    WITH rr AS (
      SELECT 4, $ten UNION ALL
      SELECT 2, $one
    )
    SELECT * FROM rr ORDER BY 1;
  } [list 2 $one 4 $ten]

  sorter_test_fakeheap 0
}

db close
sqlite3_shutdown
set t(0) singlethread
set t(1) multithread
set t(2) serialized
sqlite3_config $t($sqlite_options(threadsafe))
sqlite3_initialize
sqlite3_soft_heap_limit 0

reset_db
do_catchsql_test 16.1 {
  CREATE TABLE t1(a, b, c);
  INSERT INTO t1 VALUES(1, 2, 3);
  INSERT INTO t1 VALUES(1, NULL, 3);
  INSERT INTO t1 VALUES(NULL, 2, 3);
  INSERT INTO t1 VALUES(1, 2, NULL);
  INSERT INTO t1 VALUES(4, 5, 6);
  CREATE UNIQUE INDEX i1 ON t1(b, a, c);
} {0 {}}
reset_db
do_catchsql_test 16.2 {
  CREATE TABLE t1(a, b, c);
  INSERT INTO t1 VALUES(1, 2, 3);
  INSERT INTO t1 VALUES(1, NULL, 3);
  INSERT INTO t1 VALUES(1, 2, 3);
  INSERT INTO t1 VALUES(1, 2, NULL);
  INSERT INTO t1 VALUES(4, 5, 6);
  CREATE UNIQUE INDEX i1 ON t1(b, a, c);
} {1 {UNIQUE constraint failed: t1.b, t1.a, t1.c}}

reset_db
do_execsql_test 17.1 {
  SELECT * FROM sqlite_master ORDER BY sql;
} {}

# 2022-12-03 Ticket e8b674241947eb3b
# Improve estimates for the cost of sorting relative
# to the cost of doing an index lookup, so as to get
# a better query plan.  See the ticket for a deetailed
# example.
#
reset_db
do_execsql_test 18.1 {
  CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
  WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<50)
                           -- increase to 5000 for actual test data ----^^
    INSERT INTO t1(a,b,c) SELECT x, random()%5000, random()%5000 FROM c;
  CREATE TABLE t2(d,e,f);
  WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<500)
                         -- increase to 50000 for actual test data -----^^^
    INSERT INTO t2(d,e,f) SELECT
       NULLIF(0, random()%2), random()%5000, random()%5000
       FROM c;
  ANALYZE;
  UPDATE sqlite_stat1 SET stat='50000' WHERE tbl='t2';
  UPDATE sqlite_stat1 SET stat='5000' WHERE tbl='t1';
  ANALYZE sqlite_schema;
} {}
do_execsql_test 18.2 {
  EXPLAIN QUERY PLAN
  SELECT a FROM t1 JOIN t2
   WHERE a IN (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20)
     AND a=CASE WHEN d IS NOT NULL THEN e ELSE f END
   ORDER BY a;
} {/.*SCAN t2.*SEARCH t1.*/}
#     ^^^^^^^--^^^^^^^^^---  t2 should be the outer loop.

finish_test