# 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