#pragma ident "%Z%%M% %I% %E% SMI"
# 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: select5.test,v 1.6 2001/10/15 00:44:36 drh Exp $
set testdir [file dirname $argv0]
source $testdir/tester.tcl
# Build some test data
#
set fd [open data1.txt w]
for {set i 1} {$i<32} {incr i} {
for {set j 0} {pow(2,$j)<$i} {incr j} {}
puts $fd "[expr {32-$i}]\t[expr {10-$j}]"
}
close $fd
execsql {
CREATE TABLE t1(x int, y int);
COPY t1 FROM 'data1.txt'
}
file delete data1.txt
do_test select5-1.0 {
execsql {SELECT DISTINCT y FROM t1 ORDER BY y}
} {5 6 7 8 9 10}
# Sort by an aggregate function.
#
do_test select5-1.1 {
execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY y}
} {5 15 6 8 7 4 8 2 9 1 10 1}
do_test select5-1.2 {
execsql {SELECT y, count(*) FROM t1 GROUP BY y ORDER BY count(*), y}
} {9 1 10 1 8 2 7 4 6 8 5 15}
do_test select5-1.3 {
execsql {SELECT count(*), y FROM t1 GROUP BY y ORDER BY count(*), y}
} {1 9 1 10 2 8 4 7 8 6 15 5}
# Some error messages associated with aggregates and GROUP BY
#
do_test select5-2.1 {
set v [catch {execsql {
SELECT y, count(*) FROM t1 GROUP BY z ORDER BY y
}} msg]
lappend v $msg
} {1 {no such column: z}}
do_test select5-2.2 {
set v [catch {execsql {
SELECT y, count(*) FROM t1 GROUP BY z(y) ORDER BY y
}} msg]
lappend v $msg
} {1 {no such function: z}}
do_test select5-2.3 {
set v [catch {execsql {
SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<3 ORDER BY y
}} msg]
lappend v $msg
} {0 {8 2 9 1 10 1}}
do_test select5-2.4 {
set v [catch {execsql {
SELECT y, count(*) FROM t1 GROUP BY y HAVING z(y)<3 ORDER BY y
}} msg]
lappend v $msg
} {1 {no such function: z}}
do_test select5-2.5 {
set v [catch {execsql {
SELECT y, count(*) FROM t1 GROUP BY y HAVING count(*)<z ORDER BY y
}} msg]
lappend v $msg
} {1 {no such column: z}}
# Get the Agg function to rehash in vdbe.c
#
do_test select5-3.1 {
execsql {
SELECT x, count(*), avg(y) FROM t1 GROUP BY x HAVING x<4 ORDER BY x
}
} {1 1 5 2 1 5 3 1 5}
# Run various aggregate functions when the count is zero.
#
do_test select5-4.1 {
execsql {
SELECT avg(x) FROM t1 WHERE x>100
}
} {{}}
do_test select5-4.2 {
execsql {
SELECT count(x) FROM t1 WHERE x>100
}
} {0}
do_test select5-4.3 {
execsql {
SELECT min(x) FROM t1 WHERE x>100
}
} {{}}
do_test select5-4.4 {
execsql {
SELECT max(x) FROM t1 WHERE x>100
}
} {{}}
do_test select5-4.5 {
execsql {
SELECT sum(x) FROM t1 WHERE x>100
}
} {0}
finish_test