# 2005 February 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: vacuum2.test,v 1.8 2008/08/23 16:17:56 danielk1977 Exp $

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

# If the VACUUM statement is disabled in the current build, skip all
# the tests in this file.
#
ifcapable {!vacuum||!autoinc} {
  finish_test
  return
}
if $AUTOVACUUM {
  finish_test
  return
}

# Ticket #1121 - make sure vacuum works if all autoincrement tables
# have been deleted.
#
do_test vacuum2-1.1 {
  execsql {
    CREATE TABLE t1(x INTEGER PRIMARY KEY AUTOINCREMENT, y);
    DROP TABLE t1;
    VACUUM;
  }
} {}

# Ticket #2518.  Make sure vacuum increments the change counter
# in the database header.
#
do_test vacuum2-2.1 {
  execsql {
    CREATE TABLE t1(x);
    CREATE TABLE t2(y);
    INSERT INTO t1 VALUES(1);
  }
  hexio_get_int [hexio_read test.db 24 4]
} [expr {[hexio_get_int [hexio_read test.db 24 4]]+3}]
do_test vacuum2-2.1 {
  execsql {
    VACUUM
  }
  hexio_get_int [hexio_read test.db 24 4]
} [expr {[hexio_get_int [hexio_read test.db 24 4]]+1}]

############################################################################
# Verify that we can use the auto_vacuum pragma to request a new
# autovacuum setting, do a VACUUM, and the new setting takes effect.
# Make sure this happens correctly even if there are multiple open
# connections to the same database file.
#
sqlite3 db2 test.db
set pageSize [db eval {pragma page_size}]

# We are currently not autovacuuming so the database should be 3 pages
# in size.  1 page for each of sqlite_master, t1, and t2.
#
do_test vacuum2-3.1 {
  execsql {
    INSERT INTO t1 VALUES('hello');
    INSERT INTO t2 VALUES('out there');
  }
  expr {[file size test.db]/$pageSize}
} {3}
set cksum [cksum]
do_test vacuum2-3.2 {
  cksum db2
} $cksum

# Convert the database to an autovacuumed database.
do_test vacuum2-3.3 {
  execsql {
    PRAGMA auto_vacuum=FULL;
    VACUUM;
  }
  expr {[file size test.db]/$pageSize}
} {4}
do_test vacuum2-3.4 {
  cksum db2
} $cksum
do_test vacuum2-3.5 {
  cksum
} $cksum
do_test vacuum2-3.6 {
  execsql {PRAGMA integrity_check} db2
} {ok}
do_test vacuum2-3.7 {
  execsql {PRAGMA integrity_check} db
} {ok}

# Convert the database back to a non-autovacuumed database.
do_test vacuum2-3.13 {
  execsql {
    PRAGMA auto_vacuum=NONE;
    VACUUM;
  }
  expr {[file size test.db]/$pageSize}
} {3}
do_test vacuum2-3.14 {
  cksum db2
} $cksum
do_test vacuum2-3.15 {
  cksum
} $cksum
do_test vacuum2-3.16 {
  execsql {PRAGMA integrity_check} db2
} {ok}
do_test vacuum2-3.17 {
  execsql {PRAGMA integrity_check} db
} {ok}

db2 close

ifcapable autovacuum {
  do_test vacuum2-4.1 {
    db close
    file delete -force test.db
    sqlite3 db test.db
    execsql {
      pragma auto_vacuum=1;
      create table t(a, b);
      insert into t values(1, 2);
      insert into t values(1, 2);
      pragma auto_vacuum=0;
      vacuum;
      pragma auto_vacuum;
    }
  } {0}
  do_test vacuum2-4.2 {
    execsql {
      pragma auto_vacuum=1;
      vacuum;
      pragma auto_vacuum;
    }
  } {1}
  do_test vacuum2-4.3 {
    execsql {
      pragma integrity_check
    }
  } {ok}
  do_test vacuum2-4.4 {
    execsql {
      pragma auto_vacuum;
    }
  } {1}
}

finish_test