test/select6.test

# 2001 September 15
#
# 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.  The
# focus of this file is testing SELECT statements that contain
# subqueries in their FROM clause.
#
# $Id: select6.test,v 1.1 2002/02/18 03:21:47 drh Exp $

set testdir [file dirname $argv0]
source $testdir/tester.tcl

# Build some test data
#
set fd [open data1.txt w]
for {set i 1} {$i<32} {incr i} {
  for {set j 0} {pow(2,$j)<$i} {incr j} {}
  puts $fd "[expr {32-$i}]\t[expr {10-$j}]"
}
close $fd
execsql {
  CREATE TABLE t1(x int, y int);
  COPY t1 FROM 'data1.txt'
}
file delete data1.txt

do_test select6-1.0 {
  execsql {SELECT DISTINCT y FROM t1 ORDER BY y}
} {5 6 7 8 9 10}

do_test select6-1.1 {
  execsql2 {SELECT * FROM (SELECT x, y FROM t1 ORDER BY x LIMIT 1)}
} {x 31 y 10}
do_test select6-1.2 {
  execsql {SELECT count(*) FROM (SELECT y FROM t1)}
} {31}
do_test select6-1.3 {
  execsql {SELECT count(*) FROM (SELECT DISTINCT y FROM t1)}
} {6}
do_test select6-1.4 {
  execsql {SELECT count(*) FROM (SELECT DISTINCT * FROM (SELECT y FROM t1))}
} {6}
do_test select6-1.5 {
  execsql {SELECT count(*) FROM (SELECT * FROM (SELECT DISTINCT y FROM t1))}
} {6}



finish_test