SQLite

/*
** 2004 April 6
**
** 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.
**
*************************************************************************
** $Id: btree.c,v 1.222 2004/11/22 05:26:27 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
**
**     Donald E. Knuth, THE ART OF COMPUTER PROGRAMMING, Volume 3:
**     "Sorting And Searching", pages 473-480. Addison-Wesley
**     Publishing Company, Reading, Massachusetts.

  pBt->pageSize = get2byte(&zDbHeader[16]);
  if( pBt->pageSize<512 || pBt->pageSize>SQLITE_MAX_PAGE_SIZE ){
    pBt->pageSize = SQLITE_DEFAULT_PAGE_SIZE;
    pBt->maxEmbedFrac = 64;   /* 25% */
    pBt->minEmbedFrac = 32;   /* 12.5% */
    pBt->minLeafFrac = 32;    /* 12.5% */
#ifndef SQLITE_OMIT_AUTOVACUUM
    /* If the magic name ":memory:" will create an in-memory database, then
    ** do not set the auto-vacuum flag, even if SQLITE_DEFAULT_AUTOVACUUM
    ** is true. On the other hand, if SQLITE_OMIT_MEMORYDB has been defined,
    ** then ":memory:" is just a regular file-name. Respect the auto-vacuum
    ** default in this case.
    */
#ifndef SQLITE_OMIT_MEMORYDB
    if( zFilename && strcmp(zFilename,":memory:") ){
#else
    if( zFilename ){
#endif
      pBt->autoVacuum = SQLITE_DEFAULT_AUTOVACUUM;
    }
#endif
    nReserve = 0;
  }else{
    nReserve = zDbHeader[20];
    pBt->maxEmbedFrac = zDbHeader[21];

**
*************************************************************************
** Main file for the SQLite library.  The routines in this file
** implement the programmer interface to the library.  Routines in
** other files are for internal use by SQLite and should not be
** accessed by users of the library.
**
** $Id: main.c,v 1.267 2004/11/22 05:26:27 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>

/*
** The following constant value is used by the SQLITE_BIGENDIAN and

  if( zFilename==0 ){
#ifndef TEMP_STORE
# define TEMP_STORE 1
#endif
#if TEMP_STORE==0
    /* Do nothing */
#endif
#ifndef SQLITE_OMIT_MEMORYDB
#if TEMP_STORE==1
    if( db->temp_store==2 ) zFilename = ":memory:";
#endif
#if TEMP_STORE==2
    if( db->temp_store!=1 ) zFilename = ":memory:";
#endif
#if TEMP_STORE==3
    zFilename = ":memory:";
#endif
#endif /* SQLITE_OMIT_MEMORYDB */
  }

  rc = sqlite3BtreeOpen(zFilename, ppBtree, btree_flags);
  if( rc==SQLITE_OK ){
    sqlite3BtreeSetBusyHandler(*ppBtree, (void*)&db->busyHandler);
    sqlite3BtreeSetCacheSize(*ppBtree, nCache);
  }

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.118 2004/11/22 05:26:28 danielk1977 Exp $
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include "sqlite3.h"
#include <ctype.h>

      i++;
      data.zKey = sqlite3_mprintf("%s",argv[i]);
    }
  }
  if( i<argc ){
    data.zDbFilename = argv[i++];
  }else{
#ifndef SQLITE_OMIT_MEMORYDB
    data.zDbFilename = ":memory:";
#else
    data.zDbFilename = 0;
#endif
  }
  if( i<argc ){
    zFirstCmd = argv[i++];
  }
  data.out = stdout;

  /* Go ahead and open the database file if it already exists.  If the

  ** information.
  **
  ** If db is NULL, then close the temporary btree if it is open.
  */
  if( db ){
    if( !pAgg->pBtree ){
      assert( pAgg->nTab==0 );
#ifndef SQLITE_OMIT_MEMORYDB
      rc = sqlite3BtreeFactory(db, ":memory:", 0, TEMP_PAGES, &pAgg->pBtree);
#else
      rc = sqlite3BtreeFactory(db, 0, 0, TEMP_PAGES, &pAgg->pBtree);
#endif
      if( rc!=SQLITE_OK ) return rc;
      sqlite3BtreeBeginTrans(pAgg->pBtree, 1);
      rc = sqlite3BtreeCreateTable(pAgg->pBtree, &pAgg->nTab, 0);
      if( rc!=SQLITE_OK ) return rc;
    }
    assert( pAgg->nTab!=0 );

# 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 SELECT statement.
#
# $Id: autovacuum.test,v 1.13 2004/11/22 05:26:28 danielk1977 Exp $

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

# If this build of the library does not support auto-vacuum, omit this
# whole file.
ifcapable {!autovacuum} {

    do_test autovacuum-1.$tn.1 {
      execsql {
        pragma integrity_check
      }
    } {ok}
  }


  foreach delete $delete_order {
    # Delete one set of rows from the table.
    do_test autovacuum-1.$tn.($delete).1 {
      execsql "
        DELETE FROM av1 WHERE oid IN ([join $delete ,])
      "
    } {}

# 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 script is in-memory database backend.
#
# $Id: memdb.test,v 1.11 2004/11/22 05:26:28 danielk1977 Exp $


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

ifcapable memorydb {

# In the following sequence of tests, compute the MD5 sum of the content
# of a table, make lots of modifications to that table, then do a rollback.
# Verify that after the rollback, the MD5 checksum is unchanged.
#
# These tests were browed from trans.tcl.
#

for {set i 1} {$i<=256} {incr i} {
  do_test memdb-7.2.$i {
     execsql "DELETE FROM t6 WHERE x=\
              (SELECT x FROM t6 ORDER BY random() LIMIT 1)"
     execsql {SELECT count(*) FROM t6}
  } [expr {256-$i}]
}

} ;# ifcapable memorydb

finish_test

# 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 script is page cache subsystem.
#
# $Id: pager2.test,v 1.5 2004/11/22 05:26:28 danielk1977 Exp $


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

# Don't run this test file if the pager test interface [pager_open] is not
# available, or the library was compiled without in-memory database support.
#
if {[info commands pager_open]!=""} {
ifcapable memorydb {
db close

# Basic sanity check.  Open and close a pager.
#
do_test pager2-1.0 {
  set v [catch {
    set ::p1 [pager_open :memory: 10]

  } {state 1}
}

do_test pager2-4.99 {
  pager_close $::p1
} {}

} ;# ifcapable inmemory
} ;# end if( has pager_open command );


finish_test

# 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 1.30 2004/11/22 05:26:28 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.
#

  do_test vacuum-6.4 {
    execsql {
      select count(*) from "abc abc" WHERE a = X'00112233';
    }
  } {1}
}

# Check what happens when an in-memory database is vacuumed. The
# [file delete] command covers us in case the library was compiled
# without in-memory database support.
#
file delete -force :memory:
do_test vacuum-7.0 {
  sqlite3 db2 :memory:
  execsql {
    CREATE TABLE t1(t);
    VACUUM;
  } db2
} {}