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sqlite3

    1: # 2002 May 24
    2: #
    3: # The author disclaims copyright to this source code.  In place of
    4: # a legal notice, here is a blessing:
    5: #
    6: #    May you do good and not evil.
    7: #    May you find forgiveness for yourself and forgive others.
    8: #    May you share freely, never taking more than you give.
    9: #
   10: #***********************************************************************
   11: # This file implements regression tests for SQLite library.
   12: #
   13: # This file implements tests for joins, including outer joins, where
   14: # there are a large number of tables involved in the join.
   15: #
   16: # $Id: join3.test,v 1.1.1.1 2012/02/21 17:04:16 misho Exp $
   17: 
   18: set testdir [file dirname $argv0]
   19: source $testdir/tester.tcl
   20: 
   21: # An unrestricted join
   22: #
   23: catch {unset ::result}
   24: set result {}
   25: for {set N 1} {$N<=$bitmask_size} {incr N} {
   26:   lappend result $N
   27:   do_test join3-1.$N {
   28:     execsql "CREATE TABLE t${N}(x);"
   29:     execsql "INSERT INTO t$N VALUES($N)"
   30:     set sql "SELECT * FROM t1"
   31:     for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}
   32:     execsql $sql
   33:   } $result
   34: }
   35: 
   36: # Joins with a comparison
   37: #
   38: set result {}
   39: for {set N 1} {$N<=$bitmask_size} {incr N} {
   40:   lappend result $N
   41:   do_test join3-2.$N {
   42:     set sql "SELECT * FROM t1"
   43:     for {set i 2} {$i<=$N} {incr i} {append sql ", t$i"}
   44:     set sep WHERE
   45:     for {set i 1} {$i<$N} {incr i} {
   46:       append sql " $sep t[expr {$i+1}].x==t$i.x+1"
   47:       set sep AND
   48:     }
   49:     execsql $sql
   50:   } $result
   51: }
   52: 
   53: # Error of too many tables in the join
   54: #
   55: do_test join3-3.1 {
   56:   set sql "SELECT * FROM t1 AS t0, t1"
   57:   for {set i 2} {$i<=$bitmask_size} {incr i} {append sql ", t$i"}
   58:   catchsql $sql
   59: } [list 1 "at most $bitmask_size tables in a join"]
   60: 
   61: 
   62: finish_test