# 2001 September 15

 #

 # Portions Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiaries. All rights reserved.

 #

 # 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 the SELECT statement.

 #

 # $Id: select2.test,v 1.27 2008/07/12 14:52:20 drh Exp $

 set testdir [file dirname $argv0]

 source $testdir/tester.tcl

 # Create a table with some data

 #

 execsql {CREATE TABLE tbl1(f1 int, f2 int)}

 execsql {BEGIN}

 for {set i 0} {$i<=30} {incr i} {

   execsql "INSERT INTO tbl1 VALUES([expr {$i%9}],[expr {$i%10}])"

 }

 execsql {COMMIT}

 # Do a second query inside a first.

 #

 do_test select2-1.1 {

   set sql {SELECT DISTINCT f1 FROM tbl1 ORDER BY f1}

   set r {}

   catch {unset data}

   db eval $sql data {

     set f1 $data(f1)

     lappend r $f1:

     set sql2 "SELECT f2 FROM tbl1 WHERE f1=$f1 ORDER BY f2"

     db eval $sql2 d2 {

       lappend r $d2(f2)

     }

   }

   set r

 } {0: 0 7 8 9 1: 0 1 8 9 2: 0 1 2 9 3: 0 1 2 3 4: 2 3 4 5: 3 4 5 6: 4 5 6 7: 5 6 7 8: 6 7 8}

 do_test select2-1.2 {

   set sql {SELECT DISTINCT f1 FROM tbl1 WHERE f1>3 AND f1<5}

   set r {}

   db eval $sql data {

     set f1 $data(f1)

     lappend r $f1:

     set sql2 "SELECT f2 FROM tbl1 WHERE f1=$f1 ORDER BY f2"

     db eval $sql2 d2 {

       lappend r $d2(f2)

     }

   }

   set r

 } {4: 2 3 4}

 unset data

 # Create a largish table. Do this twice, once using the TCL cache and once

 # without.  Compare the performance to make sure things go faster with the

 # cache turned on.

 #

 ifcapable tclvar {

   do_test select2-2.0.1 {

     set t1 [time {

       execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}

       for {set i 1} {$i<=30000} {incr i} {

         set i2 [expr {$i*2}]

         set i3 [expr {$i*3}]

         db eval {INSERT INTO tbl2 VALUES($i,$i2,$i3)}

       }

       execsql {COMMIT}

     }]

     list

   } {}

   puts "time with cache: $::t1"

 }

 catch {execsql {DROP TABLE tbl2}}

 do_test select2-2.0.2 {

   set t2 [time {

     execsql {CREATE TABLE tbl2(f1 int, f2 int, f3 int); BEGIN;}

     for {set i 1} {$i<=30000} {incr i} {

       set i2 [expr {$i*2}]

       set i3 [expr {$i*3}]

       execsql "INSERT INTO tbl2 VALUES($i,$i2,$i3)"

     }

     execsql {COMMIT}

   }]

   list

 } {}

 puts "time without cache: $t2"

 #Symbian OS: This is a tclsqlite3.exe test. We do not use the TCL cache.

 if {$::tcl_platform(platform)!="symbian"} {

   ifcapable tclvar {

     do_test select2-2.0.3 {

       expr {[lindex $t1 0]<[lindex $t2 0]}

     } 1

   }

 }

 do_test select2-2.1 {

   execsql {SELECT count(*) FROM tbl2}

 } {30000}

 do_test select2-2.2 {

   execsql {SELECT count(*) FROM tbl2 WHERE f2>1000}

 } {29500}

 do_test select2-3.1 {

   execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}

 } {500}

 do_test select2-3.2a {

   execsql {CREATE INDEX idx1 ON tbl2(f2)}

 } {}

 do_test select2-3.2b {

   execsql {SELECT f1 FROM tbl2 WHERE 1000=f2}

 } {500}

 do_test select2-3.2c {

   execsql {SELECT f1 FROM tbl2 WHERE f2=1000}

 } {500}

 do_test select2-3.2d {

   set sqlite_search_count 0

   execsql {SELECT * FROM tbl2 WHERE 1000=f2}

   set sqlite_search_count

 } {3}

 do_test select2-3.2e {

   set sqlite_search_count 0

   execsql {SELECT * FROM tbl2 WHERE f2=1000}

   set sqlite_search_count

 } {3}

 # Make sure queries run faster with an index than without

 #

 do_test select2-3.3 {

   execsql {DROP INDEX idx1}

   set sqlite_search_count 0

   execsql {SELECT f1 FROM tbl2 WHERE f2==2000}

   set sqlite_search_count

 } {29999}

 # Make sure we can optimize functions in the WHERE clause that

 # use fields from two or more different table.  (Bug #6)

 #

 do_test select2-4.1 {

   execsql {

     CREATE TABLE aa(a);

     CREATE TABLE bb(b);

     INSERT INTO aa VALUES(1);

     INSERT INTO aa VALUES(3);

     INSERT INTO bb VALUES(2);

     INSERT INTO bb VALUES(4);

     SELECT * FROM aa, bb WHERE max(a,b)>2;

   }

 } {1 4 3 2 3 4}

 do_test select2-4.2 {

   execsql {

     INSERT INTO bb VALUES(0);

     SELECT * FROM aa, bb WHERE b;

   }

 } {1 2 1 4 3 2 3 4}

 do_test select2-4.3 {

   execsql {

     SELECT * FROM aa, bb WHERE NOT b;

   }

 } {1 0 3 0}

 do_test select2-4.4 {

   execsql {

     SELECT * FROM aa, bb WHERE min(a,b);

   }

 } {1 2 1 4 3 2 3 4}

 do_test select2-4.5 {

   execsql {

     SELECT * FROM aa, bb WHERE NOT min(a,b);

   }

 } {1 0 3 0}

 do_test select2-4.6 {

   execsql {

     SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 1 END;

   }

 } {1 2 3 4}

 do_test select2-4.7 {

   execsql {

     SELECT * FROM aa, bb WHERE CASE WHEN a=b-1 THEN 0 ELSE 1 END;

   }

 } {1 4 1 0 3 2 3 0}

 finish_test