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# 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
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