sl@0: # 2002 May 24
sl@0: #
sl@0: # The author disclaims copyright to this source code.  In place of
sl@0: # a legal notice, here is a blessing:
sl@0: #
sl@0: #    May you do good and not evil.
sl@0: #    May you find forgiveness for yourself and forgive others.
sl@0: #    May you share freely, never taking more than you give.
sl@0: #
sl@0: #***********************************************************************
sl@0: # This file implements regression tests for SQLite library.
sl@0: #
sl@0: # This file implements tests for joins, including outer joins, where
sl@0: # there are a large number of tables involved in the join.
sl@0: #
sl@0: # $Id: join3.test,v 1.4 2005/01/19 23:24:51 drh Exp $
sl@0: 
sl@0: set testdir [file dirname $argv0]
sl@0: source $testdir/tester.tcl
sl@0: 
sl@0: # An unrestricted join
sl@0: #
sl@0: catch {unset ::result}
sl@0: set result {}
sl@0: for {set N 1} {$N<=$bitmask_size} {incr N} {
sl@0:   lappend result $N
sl@0:   do_test join3-1.$N {
sl@0:     execsql "CREATE TABLE t${N}(x);"
sl@0:     execsql "INSERT INTO t$N VALUES($N)"
sl@0:     set sql "SELECT * FROM t1"
sl@0:     for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}
sl@0:     execsql $sql
sl@0:   } $result
sl@0: }
sl@0: 
sl@0: # Joins with a comparison
sl@0: #
sl@0: set result {}
sl@0: for {set N 1} {$N<=$bitmask_size} {incr N} {
sl@0:   lappend result $N
sl@0:   do_test join3-2.$N {
sl@0:     set sql "SELECT * FROM t1"
sl@0:     for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}
sl@0:     set sep WHERE
sl@0:     for {set i 1} {$i<$N} {incr i} {
sl@0:       append sql " $sep t[expr {$i+1}].x==t$i.x+1"
sl@0:       set sep AND
sl@0:     }
sl@0:     execsql $sql
sl@0:   } $result
sl@0: }
sl@0: 
sl@0: # Error of too many tables in the join
sl@0: #
sl@0: do_test join3-3.1 {
sl@0:   set sql "SELECT * FROM t1 AS t0, t1"
sl@0:   for {set i 2} {$i<=$bitmask_size} {incr i} {append sql ", t$i"}
sl@0:   catchsql $sql
sl@0: } [list 1 "at most $bitmask_size tables in a join"]
sl@0: 
sl@0: 
sl@0: finish_test