rowid.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.

# 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 the magic ROWID column that is
# found on all tables.
#
# $Id: rowid.test,v 1.19 2007/04/25 11:32:30 drh Exp $

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

# Basic ROWID functionality tests.
#
do_test rowid-1.1 {
  execsql {
    CREATE TABLE t1(x int, y int);
    INSERT INTO t1 VALUES(1,2);
    INSERT INTO t1 VALUES(3,4);
    SELECT x FROM t1 ORDER BY y;
  }
} {1 3}
do_test rowid-1.2 {
  set r [execsql {SELECT rowid FROM t1 ORDER BY x}]
  global x2rowid rowid2x
  set x2rowid(1) [lindex $r 0]
  set x2rowid(3) [lindex $r 1]
  set rowid2x($x2rowid(1)) 1
  set rowid2x($x2rowid(3)) 3
  llength $r
} {2}
do_test rowid-1.3 {
  global x2rowid
  set sql "SELECT x FROM t1 WHERE rowid==$x2rowid(1)"
  execsql $sql
} {1}
do_test rowid-1.4 {
  global x2rowid
  set sql "SELECT x FROM t1 WHERE rowid==$x2rowid(3)"
  execsql $sql
} {3}
do_test rowid-1.5 {
  global x2rowid
  set sql "SELECT x FROM t1 WHERE oid==$x2rowid(1)"
  execsql $sql
} {1}
do_test rowid-1.6 {
  global x2rowid
  set sql "SELECT x FROM t1 WHERE OID==$x2rowid(3)"
  execsql $sql
} {3}
do_test rowid-1.7 {
  global x2rowid
  set sql "SELECT x FROM t1 WHERE _rowid_==$x2rowid(1)"
  execsql $sql
} {1}
do_test rowid-1.7.1 {
  while 1 {
    set norow [expr {int(rand()*1000000)}]
    if {$norow!=$x2rowid(1) && $norow!=$x2rowid(3)} break
  }
  execsql "SELECT x FROM t1 WHERE rowid=$norow"
} {}
do_test rowid-1.8 {
  global x2rowid
  set v [execsql {SELECT x, oid FROM t1 order by x}]
  set v2 [list 1 $x2rowid(1) 3 $x2rowid(3)]
  expr {$v==$v2}
} {1}
do_test rowid-1.9 {
  global x2rowid
  set v [execsql {SELECT x, RowID FROM t1 order by x}]
  set v2 [list 1 $x2rowid(1) 3 $x2rowid(3)]
  expr {$v==$v2}
} {1}
do_test rowid-1.10 {
  global x2rowid
  set v [execsql {SELECT x, _rowid_ FROM t1 order by x}]
  set v2 [list 1 $x2rowid(1) 3 $x2rowid(3)]
  expr {$v==$v2}
} {1}

# We can insert or update the ROWID column.
#
do_test rowid-2.1 {
  catchsql {
    INSERT INTO t1(rowid,x,y) VALUES(1234,5,6);
    SELECT rowid, * FROM t1;
  }
} {0 {1 1 2 2 3 4 1234 5 6}}
do_test rowid-2.2 {
  catchsql {
    UPDATE t1 SET rowid=12345 WHERE x==1;
    SELECT rowid, * FROM t1
  }
} {0 {2 3 4 1234 5 6 12345 1 2}}
do_test rowid-2.3 {
  catchsql {
    INSERT INTO t1(y,x,oid) VALUES(8,7,1235);
    SELECT rowid, * FROM t1 WHERE rowid>1000;
  }
} {0 {1234 5 6 1235 7 8 12345 1 2}}
do_test rowid-2.4 {
  catchsql {
    UPDATE t1 SET oid=12346 WHERE x==1;
    SELECT rowid, * FROM t1;
  }
} {0 {2 3 4 1234 5 6 1235 7 8 12346 1 2}}
do_test rowid-2.5 {
  catchsql {
    INSERT INTO t1(x,_rowid_,y) VALUES(9,1236,10);
    SELECT rowid, * FROM t1 WHERE rowid>1000;
  }
} {0 {1234 5 6 1235 7 8 1236 9 10 12346 1 2}}
do_test rowid-2.6 {
  catchsql {
    UPDATE t1 SET _rowid_=12347 WHERE x==1;
    SELECT rowid, * FROM t1 WHERE rowid>1000;
  }
} {0 {1234 5 6 1235 7 8 1236 9 10 12347 1 2}}

# But we can use ROWID in the WHERE clause of an UPDATE that does not
# change the ROWID.
#
do_test rowid-2.7 {
  global x2rowid
  set sql "UPDATE t1 SET x=2 WHERE OID==$x2rowid(3)"
  execsql $sql
  execsql {SELECT x FROM t1 ORDER BY x}
} {1 2 5 7 9}
do_test rowid-2.8 {
  global x2rowid
  set sql "UPDATE t1 SET x=3 WHERE _rowid_==$x2rowid(3)"
  execsql $sql
  execsql {SELECT x FROM t1 ORDER BY x}
} {1 3 5 7 9}

# We cannot index by ROWID
#
do_test rowid-2.9 {
  set v [catch {execsql {CREATE INDEX idxt1 ON t1(rowid)}} msg]
  lappend v $msg
} {1 {table t1 has no column named rowid}}
do_test rowid-2.10 {
  set v [catch {execsql {CREATE INDEX idxt1 ON t1(_rowid_)}} msg]
  lappend v $msg
} {1 {table t1 has no column named _rowid_}}
do_test rowid-2.11 {
  set v [catch {execsql {CREATE INDEX idxt1 ON t1(oid)}} msg]
  lappend v $msg
} {1 {table t1 has no column named oid}}
do_test rowid-2.12 {
  set v [catch {execsql {CREATE INDEX idxt1 ON t1(x, rowid)}} msg]
  lappend v $msg
} {1 {table t1 has no column named rowid}}

# Columns defined in the CREATE statement override the buildin ROWID
# column names.
#
do_test rowid-3.1 {
  execsql {
    CREATE TABLE t2(rowid int, x int, y int);
    INSERT INTO t2 VALUES(0,2,3);
    INSERT INTO t2 VALUES(4,5,6);
    INSERT INTO t2 VALUES(7,8,9);
    SELECT * FROM t2 ORDER BY x;
  }
} {0 2 3 4 5 6 7 8 9}
do_test rowid-3.2 {
  execsql {SELECT * FROM t2 ORDER BY rowid}
} {0 2 3 4 5 6 7 8 9}
do_test rowid-3.3 {
  execsql {SELECT rowid, x, y FROM t2 ORDER BY rowid}
} {0 2 3 4 5 6 7 8 9}
do_test rowid-3.4 {
  set r1 [execsql {SELECT _rowid_, rowid FROM t2 ORDER BY rowid}]
  foreach {a b c d e f} $r1 {}
  set r2 [execsql {SELECT _rowid_, rowid FROM t2 ORDER BY x DESC}]
  foreach {u v w x y z} $r2 {}
  expr {$u==$e && $w==$c && $y==$a}
} {1}
# sqlite3 v3 - do_probtest doesn't exist anymore?
if 0 {
do_probtest rowid-3.5 {
  set r1 [execsql {SELECT _rowid_, rowid FROM t2 ORDER BY rowid}]
  foreach {a b c d e f} $r1 {}
  expr {$a!=$b && $c!=$d && $e!=$f}
} {1}
}

# Let's try some more complex examples, including some joins.
#
do_test rowid-4.1 {
  execsql {
    DELETE FROM t1;
    DELETE FROM t2;
  }
  for {set i 1} {$i<=50} {incr i} {
    execsql "INSERT INTO t1(x,y) VALUES($i,[expr {$i*$i}])"
  }
  execsql {INSERT INTO t2 SELECT _rowid_, x*y, y*y FROM t1}
  execsql {SELECT t2.y FROM t1, t2 WHERE t1.x==4 AND t1.rowid==t2.rowid}
} {256}
do_test rowid-4.2 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t1.x==4 AND t1.rowid==t2.rowid}
} {256}
do_test rowid-4.2.1 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t1.x==4 AND t1.oid==t2.rowid}
} {256}
do_test rowid-4.2.2 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t1.x==4 AND t1._rowid_==t2.rowid}
} {256}
do_test rowid-4.2.3 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t1.x==4 AND t2.rowid==t1.rowid}
} {256}
do_test rowid-4.2.4 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t2.rowid==t1.oid AND t1.x==4}
} {256}
do_test rowid-4.2.5 {
  execsql {SELECT t2.y FROM t1, t2 WHERE t1.x==4 AND t1._rowid_==t2.rowid}
} {256}
do_test rowid-4.2.6 {
  execsql {SELECT t2.y FROM t1, t2 WHERE t1.x==4 AND t2.rowid==t1.rowid}
} {256}
do_test rowid-4.2.7 {
  execsql {SELECT t2.y FROM t1, t2 WHERE t2.rowid==t1.oid AND t1.x==4}
} {256}
do_test rowid-4.3 {
  execsql {CREATE INDEX idxt1 ON t1(x)}
  execsql {SELECT t2.y FROM t1, t2 WHERE t1.x==4 AND t1.rowid==t2.rowid}
} {256}
do_test rowid-4.3.1 {
  execsql {SELECT t2.y FROM t1, t2 WHERE t1.x==4 AND t1._rowid_==t2.rowid}
} {256}
do_test rowid-4.3.2 {
  execsql {SELECT t2.y FROM t1, t2 WHERE t2.rowid==t1.oid AND 4==t1.x}
} {256}
do_test rowid-4.4 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t1.x==4 AND t1.rowid==t2.rowid}
} {256}
do_test rowid-4.4.1 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t1.x==4 AND t1._rowid_==t2.rowid}
} {256}
do_test rowid-4.4.2 {
  execsql {SELECT t2.y FROM t2, t1 WHERE t2.rowid==t1.oid AND 4==t1.x}
} {256}
do_test rowid-4.5 {
  execsql {CREATE INDEX idxt2 ON t2(y)}
  set sqlite_search_count 0
  concat [execsql {
    SELECT t1.x FROM t2, t1 
    WHERE t2.y==256 AND t1.rowid==t2.rowid
  }] $sqlite_search_count
} {4 3}
do_test rowid-4.5.1 {
  set sqlite_search_count 0
  concat [execsql {
    SELECT t1.x FROM t2, t1 
    WHERE t1.OID==t2.rowid AND t2.y==81
  }] $sqlite_search_count
} {3 3}
do_test rowid-4.6 {
  execsql {
    SELECT t1.x FROM t1, t2
    WHERE t2.y==256 AND t1.rowid==t2.rowid
  }
} {4}

do_test rowid-5.1.1 {
  ifcapable subquery {
    execsql {DELETE FROM t1 WHERE _rowid_ IN (SELECT oid FROM t1 WHERE x>8)}
  } else {
    set oids [execsql {SELECT oid FROM t1 WHERE x>8}]
    set where "_rowid_ = [join $oids { OR _rowid_ = }]"
    execsql "DELETE FROM t1 WHERE $where"
  }
} {}
do_test rowid-5.1.2 {
  execsql {SELECT max(x) FROM t1}
} {8}

# Make sure a "WHERE rowid=X" clause works when there is no ROWID of X.
#
do_test rowid-6.1 {
  execsql {
    SELECT x FROM t1
  }
} {1 2 3 4 5 6 7 8}
do_test rowid-6.2 {
  for {set ::norow 1} {1} {incr ::norow} {
    if {[execsql "SELECT x FROM t1 WHERE rowid=$::norow"]==""}  break
  }
  execsql [subst {
    DELETE FROM t1 WHERE rowid=$::norow
  }]
} {}
do_test rowid-6.3 {
  execsql {
    SELECT x FROM t1
  }
} {1 2 3 4 5 6 7 8}

# Beginning with version 2.3.4, SQLite computes rowids of new rows by
# finding the maximum current rowid and adding one.  It falls back to
# the old random algorithm if the maximum rowid is the largest integer.
# The following tests are for this new behavior.
#
do_test rowid-7.0 {
  execsql {
    DELETE FROM t1;
    DROP TABLE t2;
    DROP INDEX idxt1;
    INSERT INTO t1 VALUES(1,2);
    SELECT rowid, * FROM t1;
  }
} {1 1 2}
do_test rowid-7.1 {
  execsql {
    INSERT INTO t1 VALUES(99,100);
    SELECT rowid,* FROM t1
  }
} {1 1 2 2 99 100}
do_test rowid-7.2 {
  execsql {
    CREATE TABLE t2(a INTEGER PRIMARY KEY, b);
    INSERT INTO t2(b) VALUES(55);
    SELECT * FROM t2;
  }
} {1 55}
do_test rowid-7.3 {
  execsql {