vacuum.test

SQLite 2.8.6 源代码,用来在Linux/Unix/Windows上编译安装.它是一个小型的数据库,但是非常好用,速度也快,一般的数据库查询之类的操作据统计比MySQL,PostgreSQL

# 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 VACUUM statement.
#
# $Id: vacuum.test,v 1.11 2003/08/15 13:24:53 drh Exp $

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

proc cksum {{db db}} {
  set txt [$db eval {SELECT name, type, sql FROM sqlite_master}]\n
  foreach tbl [$db eval {SELECT name FROM sqlite_master WHERE type='table'}] {
    append txt [$db eval "SELECT * FROM $tbl"]\n
  }
  foreach prag {default_synchronous default_cache_size} {
    append txt $prag-[$db eval "PRAGMA $prag"]\n
  }
  set cksum [string length $txt]-[md5 $txt]
  # puts $cksum-[file size test.db]
  return $cksum
}

do_test vacuum-1.1 {
  execsql {
    BEGIN;
    CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c);
    INSERT INTO t1 VALUES(NULL,randstr(10,100),randstr(5,50));
    INSERT INTO t1 VALUES(123456,randstr(10,100),randstr(5,50));
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    INSERT INTO t1 SELECT NULL, b||'-'||rowid, c||'-'||rowid FROM t1;
    CREATE INDEX i1 ON t1(b,c);
    CREATE TABLE t2 AS SELECT * FROM t1;
    COMMIT;
    DROP TABLE t2;
  }
  set ::size1 [file size test.db]
  set ::cksum [cksum]
  expr {$::cksum!=""}
} {1}
do_test vacuum-1.2 {
  execsql {
    VACUUM;
  }
  cksum
} $cksum
do_test vacuum-1.3 {
  expr {[file size test.db]<$::size1}
} {1}
do_test vacuum-1.4 {
  execsql {
    BEGIN;
    CREATE TABLE t2 AS SELECT * FROM t1;
    CREATE TABLE t3 AS SELECT * FROM t1;
    CREATE VIEW v1 AS SELECT b, c FROM t3;
    CREATE TRIGGER r1 AFTER DELETE ON t2 BEGIN
      SELECT 1;
    END;
    COMMIT;
    DROP TABLE t2;
  }
  set ::size1 [file size test.db]
  set ::cksum [cksum]
  expr {$::cksum!=""}
} {1}
do_test vacuum-1.5 {
  execsql {
    VACUUM;
  }
  cksum
} $cksum
do_test vacuum-1.6 {
  expr {[file size test.db]<$::size1}
} {1}

do_test vacuum-2.1 {
  catchsql {
    BEGIN;
    VACUUM;
    COMMIT;
  }
} {1 {cannot VACUUM from within a transaction}}
catch {db eval COMMIT}
do_test vacuum-2.2 {
  sqlite db2 test.db
  execsql {
    BEGIN;
    CREATE TABLE t4 AS SELECT * FROM t1;
    CREATE TABLE t5 AS SELECT * FROM t1;
    COMMIT;
    DROP TABLE t4;
    DROP TABLE t5;
  } db2
  set ::cksum [cksum db2]
  catchsql {
    VACUUM
  }
} {1 {database schema has changed}}
do_test vacuum-2.3 {
  execsql {
    VACUUM;
  }
  cksum
} $cksum
do_test vacuum-2.4 {
  catch {db2 eval {SELECT count(*) FROM sqlite_master}}
  cksum db2
} $cksum

# Ticket #427.  Make sure VACUUM works when the EMPTY_RESULT_CALLBACKS
# pragma is turned on.
#
do_test vacuum-3.1 {
  db close
  file delete test.db
  sqlite db test.db
  execsql {
    PRAGMA empty_result_callbacks=on;
    VACUUM;
  }
} {}

catch {db2 close}

# finish_test