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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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