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 1.299 2006/01/16 15:14:27 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.

      if( pPage->intKey ){
        u8 *pCell;
        if( tryRightmost ){
          pCur->idx = upr;
        }
        pCell = findCell(pPage, pCur->idx) + pPage->childPtrSize;
        if( pPage->hasData ){
          u32 dummy;
          pCell += getVarint32(pCell, &dummy);
        }
        getVarint(pCell, (u64 *)&nCellKey);
        if( nCellKey<nKey ){
          c = -1;
        }else if( nCellKey>nKey ){
          c = +1;
          tryRightmost = 0;
        }else{
          c = 0;

**     CREATE INDEX
**     DROP INDEX
**     creating ID lists
**     BEGIN TRANSACTION
**     COMMIT
**     ROLLBACK
**
** $Id: build.c,v 1.381 2006/01/16 15:14:28 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>

/*
** This routine is called when a new SQL statement is beginning to
** be parsed.  Initialize the pParse structure as needed.

#endif
    pParse->pNewTable = 0;
    db->nTable++;
    db->flags |= SQLITE_InternChanges;

#ifndef SQLITE_OMIT_ALTERTABLE
    if( !p->pSelect ){
      const char *zName = (const char *)pParse->sNameToken.z;
      int nName;
      assert( !pSelect && pCons && pEnd );
      if( pCons->z==0 ){
        pCons = pEnd;
      }
      nName = (const char *)pCons->z - zName;
      p->addColOffset = 13 + sqlite3utf8CharLen(zName, nName);
    }
#endif
  }
}

#ifndef SQLITE_OMIT_VIEW
/*

      sizeof(char *)*nCol +        /* Index.azColl     */
      sizeof(u8)*nCol +            /* Index.aSortOrder */
      nName + 1 +                  /* Index.zName      */
      nExtra                       /* Collation sequence names */
  );
  if( sqlite3ThreadDataReadOnly()->mallocFailed ) goto exit_create_index;
  pIndex->aiColumn = (int *)(&pIndex[1]);
  pIndex->aiRowEst = (unsigned *)(&pIndex->aiColumn[nCol]);
  pIndex->azColl = (char **)(&pIndex->aiRowEst[nCol+1]);
  pIndex->aSortOrder = (u8 *)(&pIndex->azColl[nCol]);
  pIndex->zName = (char *)(&pIndex->aSortOrder[nCol]);
  zExtra = (char *)(&pIndex->zName[nName+1]);
  strcpy(pIndex->zName, zName);
  pIndex->pTable = pTab;
  pIndex->nColumn = pList->nExpr;

  if( pName1==0 || pName1->z==0 ){
    reindexDatabases(pParse, 0);
    return;
  }else if( pName2==0 || pName2->z==0 ){
    assert( pName1->z );
    pColl = sqlite3FindCollSeq(db, ENC(db), (char*)pName1->z, pName1->n, 0);
    if( pColl ){
      char *z = sqliteStrNDup((const char *)pName1->z, pName1->n);
      if( z ){
        reindexDatabases(pParse, z);
        sqliteFree(z);
      }
      return;
    }
  }

** The pager is used to access a database disk file.  It implements
** atomic commit and rollback through the use of a journal file that
** is separate from the database file.  The pager also implements file
** locking to prevent two processes from writing the same database
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.240 2006/01/16 15:14:28 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
#include "os.h"
#include "pager.h"
#include <assert.h>
#include <string.h>

}

/*
** Write a 32-bit integer into the given file descriptor.  Return SQLITE_OK
** on success or an error code is something goes wrong.
*/
static int write32bits(OsFile *fd, u32 val){
  char ac[4];
  put32bits(ac, val);
  return sqlite3OsWrite(fd, ac, 4);
}

/*
** Write the 32-bit integer 'val' into the page identified by page header
** 'p' at offset 'offset'.
*/
static void store32bits(u32 val, PgHdr *p, int offset){
  char *ac;
  ac = &((char*)PGHDR_TO_DATA(p))[offset];
  put32bits(ac, val);
}

/*
** Read a 32-bit integer at offset 'offset' from the page identified by
** page header 'p'.
*/

/*
** 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.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.469 2006/01/16 15:14:28 danielk1977 Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_

/*
** Extra interface definitions for those who need them
*/

#ifndef SQLITE_OMIT_SHARED_CACHE
  void sqlite3TableLock(Parse *, int, int, u8, const char *);
#else
  #define sqlite3TableLock(v,w,x,y,z)
#endif

void sqlite3MallocClearFailed();
#ifdef NDEBUG
  #define sqlite3MallocDisallow()
  #define sqlite3MallocAllow()
#else
  void sqlite3MallocDisallow();
  void sqlite3MallocAllow();
#endif

#ifdef SQLITE_SSE
#include "sseInt.h"
#endif

#endif

**
** Various scripts scan this source file in order to generate HTML
** documentation, headers files, or other derived files.  The formatting
** of the code in this file is, therefore, important.  See other comments
** in this file for details.  If in doubt, do not deviate from existing
** commenting and indentation practices when changing or adding code.
**
** $Id: vdbe.c,v 1.531 2006/01/16 15:14:28 danielk1977 Exp $
*/
#include "sqliteInt.h"
#include "os.h"
#include <ctype.h>
#include "vdbeInt.h"

/*

      rc = sqlite3VdbeMemFromBtree(pCrsr, 0, offset, pC->isIndex, &sMem);
      if( rc!=SQLITE_OK ){
        goto op_column_out;
      }
      zData = sMem.z;
    }
    zEndHdr = (u8 *)zData + offset;
    zIdx = (u8 *)zData + (int)zIdx;

    /* Scan the header and use it to fill in the aType[] and aOffset[]
    ** arrays.  aType[i] will contain the type integer for the i-th
    ** column and aOffset[i] will contain the offset from the beginning
    ** of the record to the start of the data for the i-th column
    */
    for(i=0; i<nField; i++){

    int nField, nByte;

    nField = ((KeyInfo*)zP3)->nField;
    nByte = sizeof(*pKeyInfo) + (nField-1)*sizeof(pKeyInfo->aColl[0]) + nField;
    pKeyInfo = sqliteMallocRaw( nByte );
    pOp->p3 = (char*)pKeyInfo;
    if( pKeyInfo ){
      unsigned char *aSortOrder;
      memcpy(pKeyInfo, zP3, nByte);
      aSortOrder = pKeyInfo->aSortOrder;
      if( aSortOrder ){
        pKeyInfo->aSortOrder = (unsigned char*)&pKeyInfo->aColl[nField];
        memcpy(pKeyInfo->aSortOrder, aSortOrder, nField);
      }
      pOp->p3type = P3_KEYINFO;
    }else{
      pOp->p3type = P3_NOTUSED;
    }
  }else if( n==P3_KEYINFO_HANDOFF ){

#    May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library.  The
# focus of this script is testing the ATTACH and DETACH commands
# and related functionality.
#
# $Id: auth.test,v 1.31 2006/01/16 15:14:28 danielk1977 Exp $
#

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

# disable this test if the SQLITE_OMIT_AUTHORIZATION macro is
# defined during compilation.

      catchsql {
        ALTER TABLE t1x RENAME TO t1
      }
    } {1 {not authorized}}
    do_test auth-1.270 {
      execsql {SELECT name FROM sqlite_temp_master WHERE type='table'}
    } {t1x}


    do_test auth-1.271 {
      set authargs
    } {temp t1x {} {}}
  } ;# ifcapable altertable

} else {
  db authorizer {}
  db eval {
    DETACH DATABASE test1;
  }
}

# 2005 December 30
#
# 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: shared.test,v 1.15 2006/01/16 15:14:29 danielk1977 Exp $

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

ifcapable !shared_cache {
  finish_test
  return
}

set ::enable_shared_cache [sqlite3_enable_shared_cache 1]

foreach av [list 0 1] {





# Open the database connection and execute the auto-vacuum pragma

file delete -force test.db
sqlite3 db test.db

ifcapable autovacuum {
  do_test shared-[expr $av+1].1.0 {
    execsql "pragma auto_vacuum=$::av"
    execsql {pragma auto_vacuum}
  } "$av"
} else {
  if {$av} {
    db close
    break
  }
}

incr av

# Test organization:
#
# shared-1.*: Simple test to verify basic sanity of table level locking when
#             two connections share a pager cache.
# shared-2.*: Test that a read transaction can co-exist with a 

  # This test case sets up a test database in auto-vacuum mode consisting 
  # of two tables, t1 and t2. Both have a single index. Table t1 is 
  # populated first (so consists of pages toward the start of the db file), 
  # t2 second (pages toward the end of the file). 
  sqlite3 db test.db
  sqlite3 db2 test.db
  execsql {

    BEGIN;
    CREATE TABLE t1(a PRIMARY KEY, b);
    CREATE TABLE t2(a PRIMARY KEY, b);
  }
  set ::contents {}
  for {set i 0} {$i < 100} {incr i} {
    set a [string repeat "$i " 20]
    set b [string repeat "$i " 20]
    db eval {
      INSERT INTO t1 VALUES($a, $b);
    }
    lappend ::contents [list [expr $i+1] $a $b]
  }
  execsql {
    INSERT INTO t2 SELECT * FROM t1;
    COMMIT;
  }



} {}
do_test shared-$av.7.2 {
  # This test case deletes the contents of table t1 (the one at the start of
  # the file) while many cursors are open on table t2 and it's index. All of
  # the non-root pages will be moved from the end to the start of the file
  # when the DELETE is committed - this test verifies that moving the pages
  # does not disturb the open cursors.
  #