# 2002 May 24## 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 SQLite library.## This file implements tests for joins, including outer joins, where# there are a large number of tables involved in the join.## $Id: join3.test,v 1.4 2005/01/19 23:24:51 drh Exp $set testdir [file dirname $argv0]source $testdir/tester.tcl# An unrestricted join#catch {unset ::result}set result {}for {set N 1} {$N<=$bitmask_size} {incr N} {  lappend result $N  do_test join3-1.$N {    execsql "CREATE TABLE t${N}(x);"    execsql "INSERT INTO t$N VALUES($N)"    set sql "SELECT * FROM t1"    for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}    execsql $sql  } $result}# Joins with a comparison#set result {}for {set N 1} {$N<=$bitmask_size} {incr N} {  lappend result $N  do_test join3-2.$N {    set sql "SELECT * FROM t1"    for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}    set sep WHERE    for {set i 1} {$i<$N} {incr i} {      append sql " $sep t[expr {$i+1}].x==t$i.x+1"      set sep AND    }    execsql $sql  } $result}# Error of too many tables in the join#do_test join3-3.1 {  set sql "SELECT * FROM t1 AS t0, t1"  for {set i 2} {$i<=$bitmask_size} {incr i} {append sql ", t$i"}  catchsql $sql} [list 1 "at most $bitmask_size tables in a join"]finish_test