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: select3.test,v 1.23 2008/01/16 18:20:42 danielk1977 Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: # Build some test data
sl@0: #
sl@0: do_test select3-1.0 {
sl@0:   execsql {
sl@0:     CREATE TABLE t1(n int, log int);
sl@0:     BEGIN;
sl@0:   }
sl@0:   for {set i 1} {$i<32} {incr i} {
sl@0:     for {set j 0} {(1<<$j)<$i} {incr j} {}
sl@0:     execsql "INSERT INTO t1 VALUES($i,$j)"
sl@0:   }
sl@0:   execsql {
sl@0:     COMMIT
sl@0:   }
sl@0:   execsql {SELECT DISTINCT log FROM t1 ORDER BY log}
sl@0: } {0 1 2 3 4 5}
sl@0: 
sl@0: # Basic aggregate functions.
sl@0: #
sl@0: do_test select3-1.1 {
sl@0:   execsql {SELECT count(*) FROM t1}
sl@0: } {31}
sl@0: do_test select3-1.2 {
sl@0:   execsql {
sl@0:     SELECT min(n),min(log),max(n),max(log),sum(n),sum(log),avg(n),avg(log)
sl@0:     FROM t1
sl@0:   }
sl@0: } {1 0 31 5 496 124 16.0 4.0}
sl@0: do_test select3-1.3 {
sl@0:   execsql {SELECT max(n)/avg(n), max(log)/avg(log) FROM t1}
sl@0: } {1.9375 1.25}
sl@0: 
sl@0: # Try some basic GROUP BY clauses
sl@0: #
sl@0: do_test select3-2.1 {
sl@0:   execsql {SELECT log, count(*) FROM t1 GROUP BY log ORDER BY log}
sl@0: } {0 1 1 1 2 2 3 4 4 8 5 15}
sl@0: do_test select3-2.2 {
sl@0:   execsql {SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log}
sl@0: } {0 1 1 2 2 3 3 5 4 9 5 17}
sl@0: do_test select3-2.3.1 {
sl@0:   execsql {SELECT log, avg(n) FROM t1 GROUP BY log ORDER BY log}
sl@0: } {0 1.0 1 2.0 2 3.5 3 6.5 4 12.5 5 24.0}
sl@0: do_test select3-2.3.2 {
sl@0:   execsql {SELECT log, avg(n)+1 FROM t1 GROUP BY log ORDER BY log}
sl@0: } {0 2.0 1 3.0 2 4.5 3 7.5 4 13.5 5 25.0}
sl@0: do_test select3-2.4 {
sl@0:   execsql {SELECT log, avg(n)-min(n) FROM t1 GROUP BY log ORDER BY log}
sl@0: } {0 0.0 1 0.0 2 0.5 3 1.5 4 3.5 5 7.0}
sl@0: do_test select3-2.5 {
sl@0:   execsql {SELECT log*2+1, avg(n)-min(n) FROM t1 GROUP BY log ORDER BY log}
sl@0: } {1 0.0 3 0.0 5 0.5 7 1.5 9 3.5 11 7.0}
sl@0: do_test select3-2.6 {
sl@0:   execsql {
sl@0:     SELECT log*2+1 as x, count(*) FROM t1 GROUP BY x ORDER BY x
sl@0:   }
sl@0: } {1 1 3 1 5 2 7 4 9 8 11 15}
sl@0: do_test select3-2.7 {
sl@0:   execsql {
sl@0:     SELECT log*2+1 AS x, count(*) AS y FROM t1 GROUP BY x ORDER BY y, x
sl@0:   }
sl@0: } {1 1 3 1 5 2 7 4 9 8 11 15}
sl@0: do_test select3-2.8 {
sl@0:   execsql {
sl@0:     SELECT log*2+1 AS x, count(*) AS y FROM t1 GROUP BY x ORDER BY 10-(x+y)
sl@0:   }
sl@0: } {11 15 9 8 7 4 5 2 3 1 1 1}
sl@0: #do_test select3-2.9 {
sl@0: #  catchsql {
sl@0: #    SELECT log, count(*) FROM t1 GROUP BY 'x' ORDER BY log;
sl@0: #  }
sl@0: #} {1 {GROUP BY terms must not be non-integer constants}}
sl@0: do_test select3-2.10 {
sl@0:   catchsql {
sl@0:     SELECT log, count(*) FROM t1 GROUP BY 0 ORDER BY log;
sl@0:   }
sl@0: } {1 {1st GROUP BY term out of range - should be between 1 and 2}}
sl@0: do_test select3-2.11 {
sl@0:   catchsql {
sl@0:     SELECT log, count(*) FROM t1 GROUP BY 3 ORDER BY log;
sl@0:   }
sl@0: } {1 {1st GROUP BY term out of range - should be between 1 and 2}}
sl@0: do_test select3-2.12 {
sl@0:   catchsql {
sl@0:     SELECT log, count(*) FROM t1 GROUP BY 1 ORDER BY log;
sl@0:   }
sl@0: } {0 {0 1 1 1 2 2 3 4 4 8 5 15}}
sl@0: 
sl@0: # Cannot have an empty GROUP BY
sl@0: do_test select3-2.13 {
sl@0:   catchsql {
sl@0:     SELECT log, count(*) FROM t1 GROUP BY ORDER BY log;
sl@0:   }
sl@0: } {1 {near "ORDER": syntax error}}
sl@0: do_test select3-2.14 {
sl@0:   catchsql {
sl@0:     SELECT log, count(*) FROM t1 GROUP BY;
sl@0:   }
sl@0: } {1 {near ";": syntax error}}
sl@0: 
sl@0: # Cannot have a HAVING without a GROUP BY
sl@0: #
sl@0: do_test select3-3.1 {
sl@0:   set v [catch {execsql {SELECT log, count(*) FROM t1 HAVING log>=4}} msg]
sl@0:   lappend v $msg
sl@0: } {1 {a GROUP BY clause is required before HAVING}}
sl@0: 
sl@0: # Toss in some HAVING clauses
sl@0: #
sl@0: do_test select3-4.1 {
sl@0:   execsql {SELECT log, count(*) FROM t1 GROUP BY log HAVING log>=4 ORDER BY log}
sl@0: } {4 8 5 15}
sl@0: do_test select3-4.2 {
sl@0:   execsql {
sl@0:     SELECT log, count(*) FROM t1 
sl@0:     GROUP BY log 
sl@0:     HAVING count(*)>=4 
sl@0:     ORDER BY log
sl@0:   }
sl@0: } {3 4 4 8 5 15}
sl@0: do_test select3-4.3 {
sl@0:   execsql {
sl@0:     SELECT log, count(*) FROM t1 
sl@0:     GROUP BY log 
sl@0:     HAVING count(*)>=4 
sl@0:     ORDER BY max(n)+0
sl@0:   }
sl@0: } {3 4 4 8 5 15}
sl@0: do_test select3-4.4 {
sl@0:   execsql {
sl@0:     SELECT log AS x, count(*) AS y FROM t1 
sl@0:     GROUP BY x
sl@0:     HAVING y>=4 
sl@0:     ORDER BY max(n)+0
sl@0:   }
sl@0: } {3 4 4 8 5 15}
sl@0: do_test select3-4.5 {
sl@0:   execsql {
sl@0:     SELECT log AS x FROM t1 
sl@0:     GROUP BY x
sl@0:     HAVING count(*)>=4 
sl@0:     ORDER BY max(n)+0
sl@0:   }
sl@0: } {3 4 5}
sl@0: 
sl@0: do_test select3-5.1 {
sl@0:   execsql {
sl@0:     SELECT log, count(*), avg(n), max(n+log*2) FROM t1 
sl@0:     GROUP BY log 
sl@0:     ORDER BY max(n+log*2)+0, avg(n)+0
sl@0:   }
sl@0: } {0 1 1.0 1 1 1 2.0 4 2 2 3.5 8 3 4 6.5 14 4 8 12.5 24 5 15 24.0 41}
sl@0: do_test select3-5.2 {
sl@0:   execsql {
sl@0:     SELECT log, count(*), avg(n), max(n+log*2) FROM t1 
sl@0:     GROUP BY log 
sl@0:     ORDER BY max(n+log*2)+0, min(log,avg(n))+0
sl@0:   }
sl@0: } {0 1 1.0 1 1 1 2.0 4 2 2 3.5 8 3 4 6.5 14 4 8 12.5 24 5 15 24.0 41}
sl@0: 
sl@0: # Test sorting of GROUP BY results in the presence of an index
sl@0: # on the GROUP BY column.
sl@0: #
sl@0: do_test select3-6.1 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log;
sl@0:   }
sl@0: } {0 1 1 2 2 3 3 5 4 9 5 17}
sl@0: do_test select3-6.2 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log DESC;
sl@0:   }
sl@0: } {5 17 4 9 3 5 2 3 1 2 0 1}
sl@0: do_test select3-6.3 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1;
sl@0:   }
sl@0: } {0 1 1 2 2 3 3 5 4 9 5 17}
sl@0: do_test select3-6.4 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1 DESC;
sl@0:   }
sl@0: } {5 17 4 9 3 5 2 3 1 2 0 1}
sl@0: do_test select3-6.5 {
sl@0:   execsql {
sl@0:     CREATE INDEX i1 ON t1(log);
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log;
sl@0:   }
sl@0: } {0 1 1 2 2 3 3 5 4 9 5 17}
sl@0: do_test select3-6.6 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log DESC;
sl@0:   }
sl@0: } {5 17 4 9 3 5 2 3 1 2 0 1}
sl@0: do_test select3-6.7 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1;
sl@0:   }
sl@0: } {0 1 1 2 2 3 3 5 4 9 5 17}
sl@0: do_test select3-6.8 {
sl@0:   execsql {
sl@0:     SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1 DESC;
sl@0:   }
sl@0: } {5 17 4 9 3 5 2 3 1 2 0 1}
sl@0: 
sl@0: # Sometimes an aggregate query can return no rows at all.
sl@0: #
sl@0: do_test select3-7.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE t2(a,b);
sl@0:     INSERT INTO t2 VALUES(1,2);
sl@0:     SELECT a, sum(b) FROM t2 WHERE b=5 GROUP BY a;
sl@0:   }
sl@0: } {}
sl@0: do_test select3-7.2 {
sl@0:   execsql {
sl@0:     SELECT a, sum(b) FROM t2 WHERE b=5;
sl@0:   }
sl@0: } {{} {}}
sl@0: 
sl@0: # If a table column is of type REAL but we are storing integer values
sl@0: # in it, the values are stored as integers to take up less space.  The
sl@0: # values are converted by to REAL as they are read out of the table.
sl@0: # Make sure the GROUP BY clause does this conversion correctly.
sl@0: # Ticket #2251.
sl@0: #
sl@0: do_test select3-8.1 {
sl@0:   execsql {
sl@0:     CREATE TABLE A (
sl@0:       A1 DOUBLE,
sl@0:       A2 VARCHAR COLLATE NOCASE,
sl@0:       A3 DOUBLE
sl@0:     );
sl@0:     INSERT INTO A VALUES(39136,'ABC',1201900000);
sl@0:     INSERT INTO A VALUES(39136,'ABC',1207000000);
sl@0:     SELECT typeof(sum(a3)) FROM a;
sl@0:   }
sl@0: } {real}
sl@0: do_test select3-8.2 {
sl@0:   execsql {
sl@0:     SELECT typeof(sum(a3)) FROM a GROUP BY a1;
sl@0:   }
sl@0: } {real}
sl@0: 
sl@0: finish_test