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#!/usr/bin/env tarantool
test = require("sqltester")
test:plan(4)
--!./tcltestrunner.lua
-- 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 sql 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"]]
testprefix = "orderby9"
test:do_execsql_test(
"setup",
[[
-- create a table with many entries
CREATE TABLE t1(x INT primary key);
WITH RECURSIVE
c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
INSERT INTO t1 SELECT x FROM c;
]])
test:do_test(
1.0,
function()
-- 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.
local l1 = test:execsql("SELECT random() AS y FROM t1 ORDER BY 1;")
-- Big random() numbers are cdata, but cdata numbers can
-- not be compared nor sorted correctly.
for k,_ in pairs(l1) do l1[k] = tonumber(l1[k]) end
local l2 = table.deepcopy(l1)
table.sort(l1)
return test.is_deeply_regex(l1, l2)
end, true)
test:do_test(
1.1,
function()
local l1 = test:execsql("SELECT random() AS y FROM t1 ORDER BY random();")
for k,_ in pairs(l1) do l1[k] = tonumber(l1[k]) end
local l2 = table.deepcopy(l1)
table.sort(l1)
return test.is_deeply_regex(l1, l2)
end, true)
test:do_test(
1.2,
function()
local l1 = test:execsql("SELECT random() AS y FROM t1 ORDER BY +random();")
for k,_ in pairs(l1) do l1[k] = tonumber(l1[k]) end
local l2 = table.deepcopy(l1)
table.sort(l1)
return test.is_deeply_regex(l1, l2)
end, false)
test:finish_test()
|
