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1 # 2002 May 24 | |
2 # | |
3 # The author disclaims copyright to this source code. In place of | |
4 # a legal notice, here is a blessing: | |
5 # | |
6 # May you do good and not evil. | |
7 # May you find forgiveness for yourself and forgive others. | |
8 # May you share freely, never taking more than you give. | |
9 # | |
10 #*********************************************************************** | |
11 # This file implements regression tests for SQLite library. | |
12 # | |
13 # This file implements tests for joins, including outer joins, where | |
14 # there are a large number of tables involved in the join. | |
15 # | |
16 # $Id: join3.test,v 1.4 2005/01/19 23:24:51 drh Exp $ | |
17 | |
18 set testdir [file dirname $argv0] | |
19 source $testdir/tester.tcl | |
20 | |
21 # An unrestricted join | |
22 # | |
23 catch {unset ::result} | |
24 set result {} | |
25 for {set N 1} {$N<=$bitmask_size} {incr N} { | |
26 lappend result $N | |
27 do_test join3-1.$N { | |
28 execsql "CREATE TABLE t${N}(x);" | |
29 execsql "INSERT INTO t$N VALUES($N)" | |
30 set sql "SELECT * FROM t1" | |
31 for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"} | |
32 execsql $sql | |
33 } $result | |
34 } | |
35 | |
36 # Joins with a comparison | |
37 # | |
38 set result {} | |
39 for {set N 1} {$N<=$bitmask_size} {incr N} { | |
40 lappend result $N | |
41 do_test join3-2.$N { | |
42 set sql "SELECT * FROM t1" | |
43 for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"} | |
44 set sep WHERE | |
45 for {set i 1} {$i<$N} {incr i} { | |
46 append sql " $sep t[expr {$i+1}].x==t$i.x+1" | |
47 set sep AND | |
48 } | |
49 execsql $sql | |
50 } $result | |
51 } | |
52 | |
53 # Error of too many tables in the join | |
54 # | |
55 do_test join3-3.1 { | |
56 set sql "SELECT * FROM t1 AS t0, t1" | |
57 for {set i 2} {$i<=$bitmask_size} {incr i} {append sql ", t$i"} | |
58 catchsql $sql | |
59 } [list 1 "at most $bitmask_size tables in a join"] | |
60 | |
61 | |
62 finish_test | |
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