mirror of
https://github.com/tursodatabase/libsql.git
synced 2024-12-15 07:29:41 +00:00
63 lines
1.8 KiB
Plaintext
63 lines
1.8 KiB
Plaintext
# 2015-08-26
|
|
#
|
|
# 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.
|
|
#
|
|
# This file seeks to verify that expressions (and especially functions)
|
|
# that are in both the ORDER BY clause and the result set are only
|
|
# evaluated once.
|
|
#
|
|
|
|
set testdir [file dirname $argv0]
|
|
source $testdir/tester.tcl
|
|
set ::testprefix orderby9
|
|
|
|
|
|
do_execsql_test setup {
|
|
-- create a table with many entries
|
|
CREATE TABLE t1(x);
|
|
WITH RECURSIVE
|
|
c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
|
|
INSERT INTO t1 SELECT x FROM c;
|
|
}
|
|
|
|
# Some versions of TCL are unable to [lsort -int] for
|
|
# 64-bit integers. So we write our own comparison
|
|
# routine.
|
|
proc bigintcompare {a b} {
|
|
set x [expr {$a-$b}]
|
|
if {$x<0} {return -1}
|
|
if {$x>0} {return +1}
|
|
return 0
|
|
}
|
|
do_test 1.0 {
|
|
set l1 {}
|
|
# If random() is only evaluated once and then reused for each row, then
|
|
# the output should appear in sorted order. If random() is evaluated
|
|
# separately for the result set and the ORDER BY clause, then the output
|
|
# order will be random.
|
|
db eval {SELECT random() AS y FROM t1 ORDER BY 1;} {lappend l1 $y}
|
|
expr {$l1==[lsort -command bigintcompare $l1]}
|
|
} {1}
|
|
|
|
do_test 1.1 {
|
|
set l1 {}
|
|
db eval {SELECT random() AS y FROM t1 ORDER BY random();} {lappend l1 $y}
|
|
expr {$l1==[lsort -command bigintcompare $l1]}
|
|
} {1}
|
|
|
|
do_test 1.2 {
|
|
set l1 {}
|
|
db eval {SELECT random() AS y FROM t1 ORDER BY +random();} {lappend l1 $y}
|
|
expr {$l1==[lsort -command bigintcompare $l1]}
|
|
} {0}
|
|
|
|
finish_test
|