# 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 aggregate functions and the # GROUP BY and HAVING clauses of SELECT statements. # # $Id: select3.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # Build some test data # do_test select3-1.0 { execsql { CREATE TABLE t1(n int, log int); BEGIN; } for {set i 1} {$i<32} {incr i} { for {set j 0} {(1<<$j)<$i} {incr j} {} execsql "INSERT INTO t1 VALUES($i,$j)" } execsql { COMMIT } execsql {SELECT DISTINCT log FROM t1 ORDER BY log} } {0 1 2 3 4 5} # Basic aggregate functions. # do_test select3-1.1 { execsql {SELECT count(*) FROM t1} } {31} do_test select3-1.2 { execsql { SELECT min(n),min(log),max(n),max(log),sum(n),sum(log),avg(n),avg(log) FROM t1 } } {1 0 31 5 496 124 16.0 4.0} do_test select3-1.3 { execsql {SELECT max(n)/avg(n), max(log)/avg(log) FROM t1} } {1.9375 1.25} # Try some basic GROUP BY clauses # do_test select3-2.1 { execsql {SELECT log, count(*) FROM t1 GROUP BY log ORDER BY log} } {0 1 1 1 2 2 3 4 4 8 5 15} do_test select3-2.2 { execsql {SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log} } {0 1 1 2 2 3 3 5 4 9 5 17} do_test select3-2.3.1 { execsql {SELECT log, avg(n) FROM t1 GROUP BY log ORDER BY log} } {0 1.0 1 2.0 2 3.5 3 6.5 4 12.5 5 24.0} do_test select3-2.3.2 { execsql {SELECT log, avg(n)+1 FROM t1 GROUP BY log ORDER BY log} } {0 2.0 1 3.0 2 4.5 3 7.5 4 13.5 5 25.0} do_test select3-2.4 { execsql {SELECT log, avg(n)-min(n) FROM t1 GROUP BY log ORDER BY log} } {0 0.0 1 0.0 2 0.5 3 1.5 4 3.5 5 7.0} do_test select3-2.5 { execsql {SELECT log*2+1, avg(n)-min(n) FROM t1 GROUP BY log ORDER BY log} } {1 0.0 3 0.0 5 0.5 7 1.5 9 3.5 11 7.0} do_test select3-2.6 { execsql { SELECT log*2+1 as x, count(*) FROM t1 GROUP BY x ORDER BY x } } {1 1 3 1 5 2 7 4 9 8 11 15} do_test select3-2.7 { execsql { SELECT log*2+1 AS x, count(*) AS y FROM t1 GROUP BY x ORDER BY y, x } } {1 1 3 1 5 2 7 4 9 8 11 15} do_test select3-2.8 { execsql { SELECT log*2+1 AS x, count(*) AS y FROM t1 GROUP BY x ORDER BY 10-(x+y) } } {11 15 9 8 7 4 5 2 3 1 1 1} #do_test select3-2.9 { # catchsql { # SELECT log, count(*) FROM t1 GROUP BY 'x' ORDER BY log; # } #} {1 {GROUP BY terms must not be non-integer constants}} do_test select3-2.10 { catchsql { SELECT log, count(*) FROM t1 GROUP BY 0 ORDER BY log; } } {1 {1st GROUP BY term out of range - should be between 1 and 2}} do_test select3-2.11 { catchsql { SELECT log, count(*) FROM t1 GROUP BY 3 ORDER BY log; } } {1 {1st GROUP BY term out of range - should be between 1 and 2}} do_test select3-2.12 { catchsql { SELECT log, count(*) FROM t1 GROUP BY 1 ORDER BY log; } } {0 {0 1 1 1 2 2 3 4 4 8 5 15}} # Cannot have an empty GROUP BY do_test select3-2.13 { catchsql { SELECT log, count(*) FROM t1 GROUP BY ORDER BY log; } } {1 {near "ORDER": syntax error}} do_test select3-2.14 { catchsql { SELECT log, count(*) FROM t1 GROUP BY; } } {1 {near ";": syntax error}} # Cannot have a HAVING without a GROUP BY # do_test select3-3.1 { set v [catch {execsql {SELECT log, count(*) FROM t1 HAVING log>=4}} msg] lappend v $msg } {1 {a GROUP BY clause is required before HAVING}} # Toss in some HAVING clauses # do_test select3-4.1 { execsql {SELECT log, count(*) FROM t1 GROUP BY log HAVING log>=4 ORDER BY log} } {4 8 5 15} do_test select3-4.2 { execsql { SELECT log, count(*) FROM t1 GROUP BY log HAVING count(*)>=4 ORDER BY log } } {3 4 4 8 5 15} do_test select3-4.3 { execsql { SELECT log, count(*) FROM t1 GROUP BY log HAVING count(*)>=4 ORDER BY max(n)+0 } } {3 4 4 8 5 15} do_test select3-4.4 { execsql { SELECT log AS x, count(*) AS y FROM t1 GROUP BY x HAVING y>=4 ORDER BY max(n)+0 } } {3 4 4 8 5 15} do_test select3-4.5 { execsql { SELECT log AS x FROM t1 GROUP BY x HAVING count(*)>=4 ORDER BY max(n)+0 } } {3 4 5} do_test select3-5.1 { execsql { SELECT log, count(*), avg(n), max(n+log*2) FROM t1 GROUP BY log ORDER BY max(n+log*2)+0, avg(n)+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} do_test select3-5.2 { execsql { SELECT log, count(*), avg(n), max(n+log*2) FROM t1 GROUP BY log ORDER BY max(n+log*2)+0, min(log,avg(n))+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} # Test sorting of GROUP BY results in the presence of an index # on the GROUP BY column. # do_test select3-6.1 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log; } } {0 1 1 2 2 3 3 5 4 9 5 17} do_test select3-6.2 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log DESC; } } {5 17 4 9 3 5 2 3 1 2 0 1} do_test select3-6.3 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1; } } {0 1 1 2 2 3 3 5 4 9 5 17} do_test select3-6.4 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1 DESC; } } {5 17 4 9 3 5 2 3 1 2 0 1} do_test select3-6.5 { execsql { CREATE INDEX i1 ON t1(log); SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log; } } {0 1 1 2 2 3 3 5 4 9 5 17} do_test select3-6.6 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY log DESC; } } {5 17 4 9 3 5 2 3 1 2 0 1} do_test select3-6.7 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1; } } {0 1 1 2 2 3 3 5 4 9 5 17} do_test select3-6.8 { execsql { SELECT log, min(n) FROM t1 GROUP BY log ORDER BY 1 DESC; } } {5 17 4 9 3 5 2 3 1 2 0 1} # Sometimes an aggregate query can return no rows at all. # do_test select3-7.1 { execsql { CREATE TABLE t2(a,b); INSERT INTO t2 VALUES(1,2); SELECT a, sum(b) FROM t2 WHERE b=5 GROUP BY a; } } {} do_test select3-7.2 { execsql { SELECT a, sum(b) FROM t2 WHERE b=5; } } {{} {}} # If a table column is of type REAL but we are storing integer values # in it, the values are stored as integers to take up less space. The # values are converted by to REAL as they are read out of the table. # Make sure the GROUP BY clause does this conversion correctly. # Ticket #2251. # do_test select3-8.1 { execsql { CREATE TABLE A ( A1 DOUBLE, A2 VARCHAR COLLATE NOCASE, A3 DOUBLE ); INSERT INTO A VALUES(39136,'ABC',1201900000); INSERT INTO A VALUES(39136,'ABC',1207000000); SELECT typeof(sum(a3)) FROM a; } } {real} do_test select3-8.2 { execsql { SELECT typeof(sum(a3)) FROM a GROUP BY a1; } } {real} finish_test