# 2006 January 02## 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 script is descending indices.## $Id: descidx3.test,v 1.3 2006/01/16 16:24:25 danielk1977 Exp $#set testdir [file dirname $argv0]source $testdir/tester.tclifcapable !bloblit {  finish_test  return}# This procedure sets the value of the file-format in file 'test.db'# to $newval. Also, the schema cookie is incremented.# proc set_file_format {newval} {  set bt [btree_open test.db 10 0]  btree_begin_transaction $bt  set meta [btree_get_meta $bt]  lset meta 2 $newval                    ;# File format  lset meta 1 [expr [lindex $meta 1]+1]  ;# Schema cookie  eval "btree_update_meta $bt $meta"  btree_commit $bt  btree_close $bt}# This procedure returns the value of the file-format in file 'test.db'.# proc get_file_format {{fname test.db}} {  set bt [btree_open $fname 10 0]  set meta [btree_get_meta $bt]  btree_close $bt  lindex $meta 2}# Verify that the file format starts as 4.#do_test descidx3-1.1 {  execsql {    CREATE TABLE t1(i INTEGER PRIMARY KEY,a,b,c,d);    CREATE INDEX t1i1 ON t1(a DESC, b ASC, c DESC);    CREATE INDEX t1i2 ON t1(b DESC, c ASC, d DESC);  }  get_file_format} {4}# Put some information in the table and verify that the descending# index actually works.#do_test descidx3-2.1 {  execsql {    INSERT INTO t1 VALUES(1, NULL, NULL, NULL, NULL);    INSERT INTO t1 VALUES(2, 2, 2, 2, 2);    INSERT INTO t1 VALUES(3, 3, 3, 3, 3);    INSERT INTO t1 VALUES(4, 2.5, 2.5, 2.5, 2.5);    INSERT INTO t1 VALUES(5, -5, -5, -5, -5);    INSERT INTO t1 VALUES(6, 'six', 'six', 'six', 'six');    INSERT INTO t1 VALUES(7, x'77', x'77', x'77', x'77');    INSERT INTO t1 VALUES(8, 'eight', 'eight', 'eight', 'eight');    INSERT INTO t1 VALUES(9, x'7979', x'7979', x'7979', x'7979');    SELECT count(*) FROM t1;  }} 9do_test descidx3-2.2 {  execsql {    SELECT i FROM t1 ORDER BY a;  }} {1 5 2 4 3 8 6 7 9}do_test descidx3-2.3 {  execsql {    SELECT i FROM t1 ORDER BY a DESC;  }} {9 7 6 8 3 4 2 5 1}# The "natural" order for the index is decreasingdo_test descidx3-2.4 {  execsql {    SELECT i FROM t1 WHERE a<=x'7979';  }} {9 7 6 8 3 4 2 5}do_test descidx3-2.5 {  execsql {    SELECT i FROM t1 WHERE a>-99;  }} {9 7 6 8 3 4 2 5}# Even when all values of t1.a are the same, sorting by A returns# the rows in reverse order because this the natural order of the# index.#do_test descidx3-3.1 {  execsql {    UPDATE t1 SET a=1;    SELECT i FROM t1 ORDER BY a;  }} {9 7 6 8 3 4 2 5 1}do_test descidx3-3.2 {  execsql {    SELECT i FROM t1 WHERE a=1 AND b>0 AND b<'zzz'  }} {2 4 3 8 6}do_test descidx3-3.3 {  execsql {    SELECT i FROM t1 WHERE b>0 AND b<'zzz'  }} {6 8 3 4 2}do_test descidx3-3.4 {  execsql {    SELECT i FROM t1 WHERE a=1 AND b>-9999 AND b<x'ffffffff'  }} {5 2 4 3 8 6 7 9}do_test descidx3-3.5 {  execsql {    SELECT i FROM t1 WHERE b>-9999 AND b<x'ffffffff'  }} {9 7 6 8 3 4 2 5}ifcapable subquery {  # If the subquery capability is not compiled in to the binary, then  # the IN(...) operator is not available. Hence these tests cannot be   # run.  do_test descidx3-4.1 {    execsql {      UPDATE t1 SET a=2 WHERE i<6;      SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz';    }  } {8 6 2 4 3}  do_test descidx3-4.2 {    execsql {      UPDATE t1 SET a=1;      SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz';    }  } {2 4 3 8 6}  do_test descidx3-4.3 {    execsql {      UPDATE t1 SET b=2;      SELECT i FROM t1 WHERE a IN (1,2) AND b>0 AND b<'zzz';    }  } {9 7 6 8 3 4 2 5 1}}finish_test