between.test

sqlite-3.4.1,嵌入式数据库.是一个功能强大的开源数据库,给学习和研发以及小型公司的发展带来了全所未有的好处.

# 2005 July 28
#
# 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 use of indices in WHERE clauses
# when the WHERE clause contains the BETWEEN operator.
#
# $Id: between.test,v 1.2 2006/01/17 09:35:02 danielk1977 Exp $

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

# Build some test data
#
do_test between-1.0 {
  execsql {
    BEGIN;
    CREATE TABLE t1(w int, x int, y int, z int);
  }
  for {set i 1} {$i<=100} {incr i} {
    set w $i
    set x [expr {int(log($i)/log(2))}]
    set y [expr {$i*$i + 2*$i + 1}]
    set z [expr {$x+$y}]
    ifcapable tclvar {
      # Random unplanned test of the $varname variable syntax.
      execsql {INSERT INTO t1 VALUES($::w,$::x,$::y,$::z)}
    } else {
      # If the $varname syntax is not available, use the regular variable
      # declaration syntax.
      execsql {INSERT INTO t1 VALUES(:w,:x,:y,:z)}
    }
  }
  execsql {
    CREATE UNIQUE INDEX i1w ON t1(w);
    CREATE INDEX i1xy ON t1(x,y);
    CREATE INDEX i1zyx ON t1(z,y,x);
    COMMIT;
  }
} {}

# This procedure executes the SQL.  Then it appends to the result the
# "sort" or "nosort" keyword depending on whether or not any sorting
# is done.  Then it appends the ::sqlite_query_plan variable.
#
proc queryplan {sql} {
  set ::sqlite_sort_count 0
  set data [execsql $sql]
  if {$::sqlite_sort_count} {set x sort} {set x nosort}
  lappend data $x
  return [concat $data $::sqlite_query_plan]
}

do_test between-1.1.1 {
  queryplan {
    SELECT * FROM t1 WHERE w BETWEEN 5 AND 6 ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 i1w}
do_test between-1.1.2 {
  queryplan {
    SELECT * FROM t1 WHERE +w BETWEEN 5 AND 6 ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 {}}
do_test between-1.2.1 {
  queryplan {
    SELECT * FROM t1 WHERE w BETWEEN 5 AND 65-y ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 i1w}
do_test between-1.2.2 {
  queryplan {
    SELECT * FROM t1 WHERE +w BETWEEN 5 AND 65-y ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 {}}
do_test between-1.3.1 {
  queryplan {
    SELECT * FROM t1 WHERE w BETWEEN 41-y AND 6 ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 i1w}
do_test between-1.3.2 {
  queryplan {
    SELECT * FROM t1 WHERE +w BETWEEN 41-y AND 6 ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 {}}
do_test between-1.4 {
  queryplan {
    SELECT * FROM t1 WHERE w BETWEEN 41-y AND 65-y ORDER BY +w
  }
} {5 2 36 38 6 2 49 51 sort t1 {}}
do_test between-1.5.1 {
  queryplan {
    SELECT * FROM t1 WHERE 26 BETWEEN y AND z ORDER BY +w
  }
} {4 2 25 27 sort t1 i1zyx}
do_test between-1.5.2 {
  queryplan {
    SELECT * FROM t1 WHERE 26 BETWEEN +y AND z ORDER BY +w
  }
} {4 2 25 27 sort t1 i1zyx}
do_test between-1.5.3 {
  queryplan {
    SELECT * FROM t1 WHERE 26 BETWEEN y AND +z ORDER BY +w
  }
} {4 2 25 27 sort t1 {}}


finish_test