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# 2018 May 8
#
# 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. Specifically,
# it tests the sqlite3_create_window_function() API.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix window5
ifcapable !windowfunc {
finish_test
return
}
proc m_step {ctx val} {
lappend ctx $val
return $ctx
}
proc m_value {ctx} {
set lSort [lsort $ctx]
set nVal [llength $lSort]
set n [expr $nVal/2]
if {($nVal % 2)==0 && $nVal>0} {
set a [lindex $lSort $n]
set b [lindex $lSort $n-1]
if {($a+$b) % 2} {
set ret [expr ($a+$b)/2.0]
} else {
set ret [expr ($a+$b)/2]
}
} else {
set ret [lindex $lSort $n]
}
return $ret
}
proc m_inverse {ctx val} {
set ctx [lrange $ctx 1 end]
return $ctx
}
proc w_value {ctx} {
lsort $ctx
}
sqlite3_create_window_function db median m_step m_value m_value m_inverse
sqlite3_create_window_function db win m_step w_value w_value m_inverse
do_test 0.0 {
test_create_window_function_misuse db
} {}
do_execsql_test 1.0 {
CREATE TABLE t1(a, b);
INSERT INTO t1 VALUES(4, 'a');
INSERT INTO t1 VALUES(6, 'b');
INSERT INTO t1 VALUES(1, 'c');
INSERT INTO t1 VALUES(5, 'd');
INSERT INTO t1 VALUES(2, 'e');
INSERT INTO t1 VALUES(3, 'f');
}
do_execsql_test 1.1 {
SELECT win(a) OVER (ORDER BY b), median(a) OVER (ORDER BY b) FROM t1;
} {4 4 {4 6} 5 {1 4 6} 4 {1 4 5 6} 4.5 {1 2 4 5 6} 4 {1 2 3 4 5 6} 3.5}
test_create_sumint db
do_execsql_test 2.0 {
SELECT sumint(a) OVER (ORDER BY rowid) FROM t1 ORDER BY rowid;
} {4 10 11 16 18 21}
do_execsql_test 2.1 {
SELECT sumint(a) OVER (ORDER BY rowid ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING) FROM t1 ORDER BY rowid;
} {10 11 12 8 10 5}
test_override_sum db
do_catchsql_test 3.0 {
SELECT sum(a) OVER
(ORDER BY b ROWS BETWEEN 1 PRECEDING AND CURRENT ROW)
FROM t1;
} {1 {sum() may not be used as a window function}}
do_execsql_test 3.1 {
SELECT sum(a) FROM t1;
} {21}
finish_test
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