# 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