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 18set testdir [file dirname $argv0] 19source $testdir/tester.tcl 20 21# An unrestricted join 22# 23catch {unset ::result} 24set result {} 25for {set N 1} {$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 } $result 34} 35 36# Joins with a comparison 37# 38set result {} 39for {set N 1} {$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 } $result 51} 52 53# Error of too many tables in the join 54# 55do_test join3-3.1 { 56 set sql "SELECT * FROM t1 AS t0, t1" 57 for {set i 2} {$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 62finish_test 63