sl@0: # 2001 September 15
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.  The
sl@0: # focus of this file is testing aggregate functions and the
sl@0: # GROUP BY and HAVING clauses of SELECT statements.
sl@0: #
sl@0: # $Id: select5.test,v 1.20 2008/08/21 14:15:59 drh Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: # Build some test data
sl@0: #
sl@0: execsql {
sl@0:   CREATE TABLE t1(x int, y int);
sl@0:   BEGIN;
sl@0: }
sl@0: for {set i 1} {$i<32} {incr i} {
sl@0:   for {set j 0} {(1<<$j)<$i} {incr j} {}
sl@0:   execsql "INSERT INTO t1 VALUES([expr {32-$i}],[expr {10-$j}])"
sl@0: }
sl@0: execsql {
sl@0:   COMMIT
sl@0: }
sl@0: 
sl@0: do_test select5-1.0 {
sl@0:   execsql {SELECT DISTINCT y FROM t1 ORDER BY y}
sl@0: } {5 6 7 8 9 10}
sl@0: 
sl@0: # Sort by an aggregate function.
sl@0: #
sl@0: do_test select5-1.1 {
sl@0:   execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY y}
sl@0: } {5 15 6 8 7 4 8 2 9 1 10 1}
sl@0: do_test select5-1.2 {
sl@0:   execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY count(*), y}
sl@0: } {9 1 10 1 8 2 7 4 6 8 5 15}
sl@0: do_test select5-1.3 {
sl@0:   execsql {SELECT count(*), y FROM t1 GROUP BY y ORDER BY count(*), y}
sl@0: } {1 9 1 10 2 8 4 7 8 6 15 5}
sl@0: 
sl@0: # Some error messages associated with aggregates and GROUP BY
sl@0: #
sl@0: do_test select5-2.1.1 {
sl@0:   catchsql {
sl@0:     SELECT y, count(*) FROM t1 GROUP BY z ORDER BY y
sl@0:   }
sl@0: } {1 {no such column: z}}
sl@0: do_test select5-2.1.2 {
sl@0:   catchsql {
sl@0:     SELECT y, count(*) FROM t1 GROUP BY temp.t1.y ORDER BY y
sl@0:   }
sl@0: } {1 {no such column: temp.t1.y}}
sl@0: do_test select5-2.2 {
sl@0:   set v [catch {execsql {
sl@0:     SELECT y, count(*) FROM t1 GROUP BY z(y) ORDER BY y
sl@0:   }} msg]
sl@0:   lappend v $msg
sl@0: } {1 {no such function: z}}
sl@0: do_test select5-2.3 {
sl@0:   set v [catch {execsql {
sl@0:     SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<3 ORDER BY y
sl@0:   }} msg]
sl@0:   lappend v $msg
sl@0: } {0 {8 2 9 1 10 1}}
sl@0: do_test select5-2.4 {
sl@0:   set v [catch {execsql {
sl@0:     SELECT y, count(*) FROM t1 GROUP BY y HAVING z(y)<3 ORDER BY y
sl@0:   }} msg]
sl@0:   lappend v $msg
sl@0: } {1 {no such function: z}}
sl@0: do_test select5-2.5 {
sl@0:   set v [catch {execsql {
sl@0:     SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<z ORDER BY y
sl@0:   }} msg]
sl@0:   lappend v $msg
sl@0: } {1 {no such column: z}}
sl@0: 
sl@0: # Get the Agg function to rehash in vdbe.c
sl@0: #
sl@0: do_test select5-3.1 {
sl@0:   execsql {
sl@0:     SELECT x, count(*), avg(y) FROM t1 GROUP BY x HAVING x<4 ORDER BY x
sl@0:   }
sl@0: } {1 1 5.0 2 1 5.0 3 1 5.0}
sl@0: 
sl@0: # Run various aggregate functions when the count is zero.
sl@0: #
sl@0: do_test select5-4.1 {
sl@0:   execsql {
sl@0:     SELECT avg(x) FROM t1 WHERE x>100
sl@0:   }
sl@0: } {{}}
sl@0: do_test select5-4.2 {
sl@0:   execsql {
sl@0:     SELECT count(x) FROM t1 WHERE x>100
sl@0:   }
sl@0: } {0}
sl@0: do_test select5-4.3 {
sl@0:   execsql {
sl@0:     SELECT min(x) FROM t1 WHERE x>100
sl@0:   }
sl@0: } {{}}
sl@0: do_test select5-4.4 {
sl@0:   execsql {
sl@0:     SELECT max(x) FROM t1 WHERE x>100
sl@0:   }
sl@0: } {{}}
sl@0: do_test select5-4.5 {
sl@0:   execsql {
sl@0:     SELECT sum(x) FROM t1 WHERE x>100
sl@0:   }
sl@0: } {{}}
sl@0: 
sl@0: # Some tests for queries with a GROUP BY clause but no aggregate functions.
sl@0: #
sl@0: # Note: The query in test cases 5.1 through 5.5 are not legal SQL. So if the 
sl@0: # implementation changes in the future and it returns different results,
sl@0: # this is not such a big deal.
sl@0: #
sl@0: do_test select5-5.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t2(a, b, c);
sl@0:     INSERT INTO t2 VALUES(1, 2, 3);
sl@0:     INSERT INTO t2 VALUES(1, 4, 5);
sl@0:     INSERT INTO t2 VALUES(6, 4, 7);
sl@0:     CREATE INDEX t2_idx ON t2(a);
sl@0:   } 
sl@0: } {}
sl@0: do_test select5-5.2 {
sl@0:   execsql {
sl@0:     SELECT a FROM t2 GROUP BY a;
sl@0:   } 
sl@0: } {1 6}
sl@0: do_test select5-5.3 {
sl@0:   execsql {
sl@0:     SELECT a FROM t2 WHERE a>2 GROUP BY a;
sl@0:   } 
sl@0: } {6}
sl@0: do_test select5-5.4 {
sl@0:   execsql {
sl@0:     SELECT a, b FROM t2 GROUP BY a, b;
sl@0:   } 
sl@0: } {1 2 1 4 6 4}
sl@0: do_test select5-5.5 {
sl@0:   execsql {
sl@0:     SELECT a, b FROM t2 GROUP BY a;
sl@0:   } 
sl@0: } {1 4 6 4}
sl@0: 
sl@0: # Test rendering of columns for the GROUP BY clause.
sl@0: #
sl@0: do_test select5-5.11 {
sl@0:   execsql {
sl@0:     SELECT max(c), b*a, b, a FROM t2 GROUP BY b*a, b, a
sl@0:   }
sl@0: } {3 2 2 1 5 4 4 1 7 24 4 6}
sl@0: 
sl@0: # NULL compare equal to each other for the purposes of processing
sl@0: # the GROUP BY clause.
sl@0: #
sl@0: do_test select5-6.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t3(x,y);
sl@0:     INSERT INTO t3 VALUES(1,NULL);
sl@0:     INSERT INTO t3 VALUES(2,NULL);
sl@0:     INSERT INTO t3 VALUES(3,4);
sl@0:     SELECT count(x), y FROM t3 GROUP BY y ORDER BY 1
sl@0:   }
sl@0: } {1 4 2 {}}
sl@0: do_test select5-6.2 {
sl@0:   execsql {
sl@0:     CREATE TABLE t4(x,y,z);
sl@0:     INSERT INTO t4 VALUES(1,2,NULL);
sl@0:     INSERT INTO t4 VALUES(2,3,NULL);
sl@0:     INSERT INTO t4 VALUES(3,NULL,5);
sl@0:     INSERT INTO t4 VALUES(4,NULL,6);
sl@0:     INSERT INTO t4 VALUES(4,NULL,6);
sl@0:     INSERT INTO t4 VALUES(5,NULL,NULL);
sl@0:     INSERT INTO t4 VALUES(5,NULL,NULL);
sl@0:     INSERT INTO t4 VALUES(6,7,8);
sl@0:     SELECT max(x), count(x), y, z FROM t4 GROUP BY y, z ORDER BY 1
sl@0:   }
sl@0: } {1 1 2 {} 2 1 3 {} 3 1 {} 5 4 2 {} 6 5 2 {} {} 6 1 7 8}
sl@0: 
sl@0: do_test select5-7.2 {
sl@0:   execsql {
sl@0:     SELECT count(*), count(x) as cnt FROM t4 GROUP BY y ORDER BY cnt;
sl@0:   }
sl@0: } {1 1 1 1 1 1 5 5}
sl@0: 
sl@0: # See ticket #3324.
sl@0: #
sl@0: do_test select5-8.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t8a(a,b);
sl@0:     CREATE TABLE t8b(x);
sl@0:     INSERT INTO t8a VALUES('one', 1);
sl@0:     INSERT INTO t8a VALUES('one', 2);
sl@0:     INSERT INTO t8a VALUES('two', 3);
sl@0:     INSERT INTO t8a VALUES('one', NULL);
sl@0:     INSERT INTO t8b(rowid,x) VALUES(1,111);
sl@0:     INSERT INTO t8b(rowid,x) VALUES(2,222);
sl@0:     INSERT INTO t8b(rowid,x) VALUES(3,333);
sl@0:     SELECT a, count(b) FROM t8a, t8b WHERE b=t8b.rowid GROUP BY a ORDER BY a;
sl@0:   }
sl@0: } {one 2 two 1}
sl@0: do_test select5-8.2 {
sl@0:   execsql {
sl@0:     SELECT a, count(b) FROM t8a, t8b WHERE b=+t8b.rowid GROUP BY a ORDER BY a;
sl@0:   }
sl@0: } {one 2 two 1}
sl@0: do_test select5-8.3 {
sl@0:   execsql {
sl@0:     SELECT t8a.a, count(t8a.b) FROM t8a, t8b WHERE t8a.b=t8b.rowid
sl@0:      GROUP BY 1 ORDER BY 1;
sl@0:   }
sl@0: } {one 2 two 1}
sl@0: do_test select5-8.4 {
sl@0:   execsql {
sl@0:     SELECT a, count(*) FROM t8a, t8b WHERE b=+t8b.rowid GROUP BY a ORDER BY a;
sl@0:   }
sl@0: } {one 2 two 1}
sl@0: do_test select5-8.5 {
sl@0:   execsql {
sl@0:     SELECT a, count(b) FROM t8a, t8b WHERE b<x GROUP BY a ORDER BY a;
sl@0:   }
sl@0: } {one 6 two 3}
sl@0: do_test select5-8.6 {
sl@0:   execsql {
sl@0:     SELECT a, count(t8a.b) FROM t8a, t8b WHERE b=t8b.rowid 
sl@0:      GROUP BY a ORDER BY 2;
sl@0:   }
sl@0: } {two 1 one 2}
sl@0: do_test select5-8.7 {
sl@0:   execsql {
sl@0:     SELECT a, count(b) FROM t8a, t8b GROUP BY a ORDER BY 2;
sl@0:   }
sl@0: } {two 3 one 6}
sl@0: do_test select5-8.8 {
sl@0:   execsql {
sl@0:     SELECT a, count(*) FROM t8a, t8b GROUP BY a ORDER BY 2;
sl@0:   }
sl@0: } {two 3 one 9}
sl@0: 
sl@0: 
sl@0: 
sl@0:  
sl@0: finish_test