1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
#!/usr/bin/env tarantool
test = require("sqltester")
test:plan(20)
--!./tcltestrunner.lua
-- 2014-04-21
--
-- The author disclaims copyright to this source code. In place of
-- a legal notice, here is a blessing:
--
-- May y ou do good and not evil.
-- May you find forgiveness for yourself and forgive others.
-- May you share freely, never taking more than you give.
--
---------------------------------------------------------------------------
--
-- Test that ticket [b75a9ca6b0] has been fixed.
--
-- Ticket [b75a9ca6b0] concerns queries that have both a GROUP BY
-- and an ORDER BY. This code verifies that sql is able to
-- optimize out the ORDER BY in some circumstances, but retains the
-- ORDER BY when necessary.
--
-- ["set","testdir",[["file","dirname",["argv0"]]]]
-- ["source",[["testdir"],"\/tester.tcl"]]
testprefix = "tkt-b75a9ca6b0"
test:do_execsql_test(
1,
[[
CREATE TABLE t1 (id INT primary key, x INT, y INT);
INSERT INTO t1 VALUES (1, 1, 3);
INSERT INTO t1 VALUES (2, 2, 2);
INSERT INTO t1 VALUES (3, 3, 1);
]])
test:do_execsql_test(
1.1,
[[
CREATE INDEX i1 ON t1(x, y);
]])
local idxscan = {0, 0, 0, "SCAN TABLE T1 USING COVERING INDEX I1 (~1048576 rows)"}
local tblscan = {0, 0, 0, "SCAN TABLE T1 (~1048576 rows)"}
local grpsort = {0, 0, 0, "USE TEMP B-TREE FOR GROUP BY"}
local sort = {0, 0, 0, "USE TEMP B-TREE FOR ORDER BY"}
local eqps = {
{"SELECT x,y FROM t1 GROUP BY x, y ORDER BY x,y", {1, 3, 2, 2, 3, 1}, {idxscan}},
{"SELECT x,y FROM t1 GROUP BY x, y ORDER BY x", {1, 3, 2, 2, 3, 1}, {idxscan, sort}},
{"SELECT x,y FROM t1 GROUP BY y, x ORDER BY y, x", {3, 1, 2, 2, 1, 3}, {idxscan, sort}},
{"SELECT x,y FROM t1 GROUP BY x ORDER BY x", {1, 3, 2, 2, 3, 1}, {idxscan}},
-- idxscan->tblscan after reorderind indexes list
-- but it does not matter
{"SELECT x,y FROM t1 GROUP BY y ORDER BY y", {3, 1, 2, 2, 1, 3}, {tblscan, grpsort}},
-- idxscan->tblscan after reorderind indexes list
-- but it does not matter (because it does full scan)
{"SELECT x,y FROM t1 GROUP BY y ORDER BY x", {1, 3, 2, 2, 3, 1}, {tblscan, grpsort, sort}},
{"SELECT x,y FROM t1 GROUP BY x, y ORDER BY x, y DESC", {1, 3, 2, 2, 3, 1}, {idxscan, sort}},
{"SELECT x,y FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC", {3, 1, 2, 2, 1, 3}, {idxscan, sort}},
{"SELECT x,y FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC", {1, 3, 2, 2, 3, 1}, {idxscan}},
}
for tn, val in ipairs(eqps) do
local q = val[1]
local res = val[2]
local eqp = val[3]
test:do_execsql_test(
"1."..tn..".1",
q, res)
test:do_eqp_test(
"1."..tn..".2",
q, eqp)
end
test:finish_test()
|
