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 aggregate functions and the

    13 # GROUP BY and HAVING clauses of SELECT statements.

    14 #

    15 # $Id: select5.test,v 1.20 2008/08/21 14:15:59 drh Exp $

    16 

    17 set testdir [file dirname $argv0]

    18 source $testdir/tester.tcl

    19 

    20 # Build some test data

    21 #

    22 execsql {

    23   CREATE TABLE t1(x int, y int);

    24   BEGIN;

    25 }

    26 for {set i 1} {$i<32} {incr i} {

    27   for {set j 0} {(1<<$j)<$i} {incr j} {}

    28   execsql "INSERT INTO t1 VALUES([expr {32-$i}],[expr {10-$j}])"

    29 }

    30 execsql {

    31   COMMIT

    32 }

    33 

    34 do_test select5-1.0 {

    35   execsql {SELECT DISTINCT y FROM t1 ORDER BY y}

    36 } {5 6 7 8 9 10}

    37 

    38 # Sort by an aggregate function.

    39 #

    40 do_test select5-1.1 {

    41   execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY y}

    42 } {5 15 6 8 7 4 8 2 9 1 10 1}

    43 do_test select5-1.2 {

    44   execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY count(*), y}

    45 } {9 1 10 1 8 2 7 4 6 8 5 15}

    46 do_test select5-1.3 {

    47   execsql {SELECT count(*), y FROM t1 GROUP BY y ORDER BY count(*), y}

    48 } {1 9 1 10 2 8 4 7 8 6 15 5}

    49 

    50 # Some error messages associated with aggregates and GROUP BY

    51 #

    52 do_test select5-2.1.1 {

    53   catchsql {

    54     SELECT y, count(*) FROM t1 GROUP BY z ORDER BY y

    55   }

    56 } {1 {no such column: z}}

    57 do_test select5-2.1.2 {

    58   catchsql {

    59     SELECT y, count(*) FROM t1 GROUP BY temp.t1.y ORDER BY y

    60   }

    61 } {1 {no such column: temp.t1.y}}

    62 do_test select5-2.2 {

    63   set v [catch {execsql {

    64     SELECT y, count(*) FROM t1 GROUP BY z(y) ORDER BY y

    65   }} msg]

    66   lappend v $msg

    67 } {1 {no such function: z}}

    68 do_test select5-2.3 {

    69   set v [catch {execsql {

    70     SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<3 ORDER BY y

    71   }} msg]

    72   lappend v $msg

    73 } {0 {8 2 9 1 10 1}}

    74 do_test select5-2.4 {

    75   set v [catch {execsql {

    76     SELECT y, count(*) FROM t1 GROUP BY y HAVING z(y)<3 ORDER BY y

    77   }} msg]

    78   lappend v $msg

    79 } {1 {no such function: z}}

    80 do_test select5-2.5 {

    81   set v [catch {execsql {

    82     SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<z ORDER BY y

    83   }} msg]

    84   lappend v $msg

    85 } {1 {no such column: z}}

    86 

    87 # Get the Agg function to rehash in vdbe.c

    88 #

    89 do_test select5-3.1 {

    90   execsql {

    91     SELECT x, count(*), avg(y) FROM t1 GROUP BY x HAVING x<4 ORDER BY x

    92   }

    93 } {1 1 5.0 2 1 5.0 3 1 5.0}

    94 

    95 # Run various aggregate functions when the count is zero.

    96 #

    97 do_test select5-4.1 {

    98   execsql {

    99     SELECT avg(x) FROM t1 WHERE x>100

   100   }

   101 } {{}}

   102 do_test select5-4.2 {

   103   execsql {

   104     SELECT count(x) FROM t1 WHERE x>100

   105   }

   106 } {0}

   107 do_test select5-4.3 {

   108   execsql {

   109     SELECT min(x) FROM t1 WHERE x>100

   110   }

   111 } {{}}

   112 do_test select5-4.4 {

   113   execsql {

   114     SELECT max(x) FROM t1 WHERE x>100

   115   }

   116 } {{}}

   117 do_test select5-4.5 {

   118   execsql {

   119     SELECT sum(x) FROM t1 WHERE x>100

   120   }

   121 } {{}}

   122 

   123 # Some tests for queries with a GROUP BY clause but no aggregate functions.

   124 #

   125 # Note: The query in test cases 5.1 through 5.5 are not legal SQL. So if the 

   126 # implementation changes in the future and it returns different results,

   127 # this is not such a big deal.

   128 #

   129 do_test select5-5.1 {

   130   execsql {

   131     CREATE TABLE t2(a, b, c);

   132     INSERT INTO t2 VALUES(1, 2, 3);

   133     INSERT INTO t2 VALUES(1, 4, 5);

   134     INSERT INTO t2 VALUES(6, 4, 7);

   135     CREATE INDEX t2_idx ON t2(a);

   136   } 

   137 } {}

   138 do_test select5-5.2 {

   139   execsql {

   140     SELECT a FROM t2 GROUP BY a;

   141   } 

   142 } {1 6}

   143 do_test select5-5.3 {

   144   execsql {

   145     SELECT a FROM t2 WHERE a>2 GROUP BY a;

   146   } 

   147 } {6}

   148 do_test select5-5.4 {

   149   execsql {

   150     SELECT a, b FROM t2 GROUP BY a, b;

   151   } 

   152 } {1 2 1 4 6 4}

   153 do_test select5-5.5 {

   154   execsql {

   155     SELECT a, b FROM t2 GROUP BY a;

   156   } 

   157 } {1 4 6 4}

   158 

   159 # Test rendering of columns for the GROUP BY clause.

   160 #

   161 do_test select5-5.11 {

   162   execsql {

   163     SELECT max(c), b*a, b, a FROM t2 GROUP BY b*a, b, a

   164   }

   165 } {3 2 2 1 5 4 4 1 7 24 4 6}

   166 

   167 # NULL compare equal to each other for the purposes of processing

   168 # the GROUP BY clause.

   169 #

   170 do_test select5-6.1 {

   171   execsql {

   172     CREATE TABLE t3(x,y);

   173     INSERT INTO t3 VALUES(1,NULL);

   174     INSERT INTO t3 VALUES(2,NULL);

   175     INSERT INTO t3 VALUES(3,4);

   176     SELECT count(x), y FROM t3 GROUP BY y ORDER BY 1

   177   }

   178 } {1 4 2 {}}

   179 do_test select5-6.2 {

   180   execsql {

   181     CREATE TABLE t4(x,y,z);

   182     INSERT INTO t4 VALUES(1,2,NULL);

   183     INSERT INTO t4 VALUES(2,3,NULL);

   184     INSERT INTO t4 VALUES(3,NULL,5);

   185     INSERT INTO t4 VALUES(4,NULL,6);

   186     INSERT INTO t4 VALUES(4,NULL,6);

   187     INSERT INTO t4 VALUES(5,NULL,NULL);

   188     INSERT INTO t4 VALUES(5,NULL,NULL);

   189     INSERT INTO t4 VALUES(6,7,8);

   190     SELECT max(x), count(x), y, z FROM t4 GROUP BY y, z ORDER BY 1

   191   }

   192 } {1 1 2 {} 2 1 3 {} 3 1 {} 5 4 2 {} 6 5 2 {} {} 6 1 7 8}

   193 

   194 do_test select5-7.2 {

   195   execsql {

   196     SELECT count(*), count(x) as cnt FROM t4 GROUP BY y ORDER BY cnt;

   197   }

   198 } {1 1 1 1 1 1 5 5}

   199 

   200 # See ticket #3324.

   201 #

   202 do_test select5-8.1 {

   203   execsql {

   204     CREATE TABLE t8a(a,b);

   205     CREATE TABLE t8b(x);

   206     INSERT INTO t8a VALUES('one', 1);

   207     INSERT INTO t8a VALUES('one', 2);

   208     INSERT INTO t8a VALUES('two', 3);

   209     INSERT INTO t8a VALUES('one', NULL);

   210     INSERT INTO t8b(rowid,x) VALUES(1,111);

   211     INSERT INTO t8b(rowid,x) VALUES(2,222);

   212     INSERT INTO t8b(rowid,x) VALUES(3,333);

   213     SELECT a, count(b) FROM t8a, t8b WHERE b=t8b.rowid GROUP BY a ORDER BY a;

   214   }

   215 } {one 2 two 1}

   216 do_test select5-8.2 {

   217   execsql {

   218     SELECT a, count(b) FROM t8a, t8b WHERE b=+t8b.rowid GROUP BY a ORDER BY a;

   219   }

   220 } {one 2 two 1}

   221 do_test select5-8.3 {

   222   execsql {

   223     SELECT t8a.a, count(t8a.b) FROM t8a, t8b WHERE t8a.b=t8b.rowid

   224      GROUP BY 1 ORDER BY 1;

   225   }

   226 } {one 2 two 1}

   227 do_test select5-8.4 {

   228   execsql {

   229     SELECT a, count(*) FROM t8a, t8b WHERE b=+t8b.rowid GROUP BY a ORDER BY a;

   230   }

   231 } {one 2 two 1}

   232 do_test select5-8.5 {

   233   execsql {

   234     SELECT a, count(b) FROM t8a, t8b WHERE b<x GROUP BY a ORDER BY a;

   235   }

   236 } {one 6 two 3}

   237 do_test select5-8.6 {

   238   execsql {

   239     SELECT a, count(t8a.b) FROM t8a, t8b WHERE b=t8b.rowid 

   240      GROUP BY a ORDER BY 2;

   241   }

   242 } {two 1 one 2}

   243 do_test select5-8.7 {

   244   execsql {

   245     SELECT a, count(b) FROM t8a, t8b GROUP BY a ORDER BY 2;

   246   }

   247 } {two 3 one 6}

   248 do_test select5-8.8 {

   249   execsql {

   250     SELECT a, count(*) FROM t8a, t8b GROUP BY a ORDER BY 2;

   251   }

   252 } {two 3 one 9}

   253 

   254 

   255 

   256  

   257 finish_test