** Constants for the largest and smallest possible 64-bit signed integers.
*/
# define LARGEST_INT64  (0xffffffff|(((i64)0x7fffffff)<<32))
# define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)

#endif






/*
** Maximum number of prefix indexes on single FTS5 table. This must be
** less than 32. If it is set to anything large than that, an #error
** directive in fts5_index.c will cause the build to fail.
*/
#define FTS5_MAX_PREFIX_INDEXES 31
................................................................................
** this connection since it was created.
*/
int sqlite3Fts5IndexReads(Fts5Index *p);

int sqlite3Fts5IndexReinit(Fts5Index *p);
int sqlite3Fts5IndexOptimize(Fts5Index *p);
int sqlite3Fts5IndexMerge(Fts5Index *p, int nMerge);


int sqlite3Fts5IndexLoadConfig(Fts5Index *p);

/*
** End of interface to code in fts5_index.c.
**************************************************************************/

................................................................................
    Fts5Storage *p, const char*, sqlite3_value*, int
);

int sqlite3Fts5StorageDeleteAll(Fts5Storage *p);
int sqlite3Fts5StorageRebuild(Fts5Storage *p);
int sqlite3Fts5StorageOptimize(Fts5Storage *p);
int sqlite3Fts5StorageMerge(Fts5Storage *p, int nMerge);


/*
** End of interface to code in fts5_storage.c.
**************************************************************************/


/**************************************************************************

** Constants for the largest and smallest possible 64-bit signed integers.
*/
# define LARGEST_INT64  (0xffffffff|(((i64)0x7fffffff)<<32))
# define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)

#endif

/* Truncate very long tokens to this many bytes. Hard limit is 
** (65536-1-1-4-9)==65521 bytes. The limiting factor is the 16-bit offset
** field that occurs at the start of each leaf page (see fts5_index.c). */
#define FTS5_MAX_TOKEN_SIZE 32768

/*
** Maximum number of prefix indexes on single FTS5 table. This must be
** less than 32. If it is set to anything large than that, an #error
** directive in fts5_index.c will cause the build to fail.
*/
#define FTS5_MAX_PREFIX_INDEXES 31
................................................................................
** this connection since it was created.
*/
int sqlite3Fts5IndexReads(Fts5Index *p);

int sqlite3Fts5IndexReinit(Fts5Index *p);
int sqlite3Fts5IndexOptimize(Fts5Index *p);
int sqlite3Fts5IndexMerge(Fts5Index *p, int nMerge);
int sqlite3Fts5IndexReset(Fts5Index *p);

int sqlite3Fts5IndexLoadConfig(Fts5Index *p);

/*
** End of interface to code in fts5_index.c.
**************************************************************************/

................................................................................
    Fts5Storage *p, const char*, sqlite3_value*, int
);

int sqlite3Fts5StorageDeleteAll(Fts5Storage *p);
int sqlite3Fts5StorageRebuild(Fts5Storage *p);
int sqlite3Fts5StorageOptimize(Fts5Storage *p);
int sqlite3Fts5StorageMerge(Fts5Storage *p, int nMerge);
int sqlite3Fts5StorageReset(Fts5Storage *p);

/*
** End of interface to code in fts5_storage.c.
**************************************************************************/


/**************************************************************************

  TokenCtx *pCtx = (TokenCtx*)pContext;
  Fts5ExprPhrase *pPhrase = pCtx->pPhrase;

  UNUSED_PARAM2(iUnused1, iUnused2);

  /* If an error has already occurred, this is a no-op */
  if( pCtx->rc!=SQLITE_OK ) return pCtx->rc;


  if( pPhrase && pPhrase->nTerm>0 && (tflags & FTS5_TOKEN_COLOCATED) ){
    Fts5ExprTerm *pSyn;
    int nByte = sizeof(Fts5ExprTerm) + sizeof(Fts5Buffer) + nToken+1;
    pSyn = (Fts5ExprTerm*)sqlite3_malloc(nByte);
    if( pSyn==0 ){
      rc = SQLITE_NOMEM;
................................................................................
){
  Fts5ExprCtx *p = (Fts5ExprCtx*)pCtx;
  Fts5Expr *pExpr = p->pExpr;
  int i;

  UNUSED_PARAM2(iUnused1, iUnused2);


  if( (tflags & FTS5_TOKEN_COLOCATED)==0 ) p->iOff++;
  for(i=0; i<pExpr->nPhrase; i++){
    Fts5ExprTerm *pTerm;
    if( p->aPopulator[i].bOk==0 ) continue;
    for(pTerm=&pExpr->apExprPhrase[i]->aTerm[0]; pTerm; pTerm=pTerm->pSynonym){
      int nTerm = (int)strlen(pTerm->zTerm);
      if( (nTerm==nToken || (nTerm<nToken && pTerm->bPrefix))

  TokenCtx *pCtx = (TokenCtx*)pContext;
  Fts5ExprPhrase *pPhrase = pCtx->pPhrase;

  UNUSED_PARAM2(iUnused1, iUnused2);

  /* If an error has already occurred, this is a no-op */
  if( pCtx->rc!=SQLITE_OK ) return pCtx->rc;
  if( nToken>FTS5_MAX_TOKEN_SIZE ) nToken = FTS5_MAX_TOKEN_SIZE;

  if( pPhrase && pPhrase->nTerm>0 && (tflags & FTS5_TOKEN_COLOCATED) ){
    Fts5ExprTerm *pSyn;
    int nByte = sizeof(Fts5ExprTerm) + sizeof(Fts5Buffer) + nToken+1;
    pSyn = (Fts5ExprTerm*)sqlite3_malloc(nByte);
    if( pSyn==0 ){
      rc = SQLITE_NOMEM;
................................................................................
){
  Fts5ExprCtx *p = (Fts5ExprCtx*)pCtx;
  Fts5Expr *pExpr = p->pExpr;
  int i;

  UNUSED_PARAM2(iUnused1, iUnused2);

  if( nToken>FTS5_MAX_TOKEN_SIZE ) nToken = FTS5_MAX_TOKEN_SIZE;
  if( (tflags & FTS5_TOKEN_COLOCATED)==0 ) p->iOff++;
  for(i=0; i<pExpr->nPhrase; i++){
    Fts5ExprTerm *pTerm;
    if( p->aPopulator[i].bOk==0 ) continue;
    for(pTerm=&pExpr->apExprPhrase[i]->aTerm[0]; pTerm; pTerm=pTerm->pSynonym){
      int nTerm = (int)strlen(pTerm->zTerm);
      if( (nTerm==nToken || (nTerm<nToken && pTerm->bPrefix))

  sqlite3_blob *pReader;          /* RO incr-blob open on %_data table */
  sqlite3_stmt *pWriter;          /* "INSERT ... %_data VALUES(?,?)" */
  sqlite3_stmt *pDeleter;         /* "DELETE FROM %_data ... id>=? AND id<=?" */
  sqlite3_stmt *pIdxWriter;       /* "INSERT ... %_idx VALUES(?,?,?,?)" */
  sqlite3_stmt *pIdxDeleter;      /* "DELETE FROM %_idx WHERE segid=? */
  sqlite3_stmt *pIdxSelect;
  int nRead;                      /* Total number of blocks read */




};

struct Fts5DoclistIter {
  u8 *aEof;                       /* Pointer to 1 byte past end of doclist */

  /* Output variables. aPoslist==0 at EOF */
  i64 iRowid;
................................................................................
      }
      pLvl->aSeg = aNew;
    }else{
      *pRc = SQLITE_NOMEM;
    }
  }
}













































/*
** Read, deserialize and return the structure record.
**
** The Fts5Structure.aLevel[] and each Fts5StructureLevel.aSeg[] array
** are over-allocated as described for function fts5StructureDecode() 
** above.
**
** If an error occurs, NULL is returned and an error code left in the
** Fts5Index handle. If an error has already occurred when this function
** is called, it is a no-op.
*/
static Fts5Structure *fts5StructureRead(Fts5Index *p){
  Fts5Config *pConfig = p->pConfig;
  Fts5Structure *pRet = 0;        /* Object to return */
  int iCookie;                    /* Configuration cookie */
  Fts5Data *pData;

  pData = fts5DataRead(p, FTS5_STRUCTURE_ROWID);
  if( p->rc ) return 0;
  /* TODO: Do we need this if the leaf-index is appended? Probably... */
  memset(&pData->p[pData->nn], 0, FTS5_DATA_PADDING);
  p->rc = fts5StructureDecode(pData->p, pData->nn, &iCookie, &pRet);


  if( p->rc==SQLITE_OK && pConfig->iCookie!=iCookie ){
    p->rc = sqlite3Fts5ConfigLoad(pConfig, iCookie);

  }

  fts5DataRelease(pData);
























  if( p->rc!=SQLITE_OK ){








    fts5StructureRelease(pRet);
    pRet = 0;
  }
  return pRet;
}

/*
** Return the total number of segments in index structure pStruct. This
** function is only ever used as part of assert() conditions.
*/
#ifdef SQLITE_DEBUG
................................................................................
    pIter->iEndofDoclist = iTermOff + nExtra;
  }
  pIter->iPgidxOff = iPgidx;

  fts5SegIterLoadRowid(p, pIter);
  fts5SegIterLoadNPos(p, pIter);
}













/*
** Initialize the object pIter to point to term pTerm/nTerm within segment
** pSeg. If there is no such term in the index, the iterator is set to EOF.
**
** If an error occurs, Fts5Index.rc is set to an appropriate error code. If 
** an error has already occurred when this function is called, it is a no-op.
................................................................................
  int flags,                      /* Mask of FTS5INDEX_XXX flags */
  Fts5StructureSegment *pSeg,     /* Description of segment */
  Fts5SegIter *pIter              /* Object to populate */
){
  int iPg = 1;
  int bGe = (flags & FTS5INDEX_QUERY_SCAN);
  int bDlidx = 0;                 /* True if there is a doclist-index */


  assert( bGe==0 || (flags & FTS5INDEX_QUERY_DESC)==0 );
  assert( pTerm && nTerm );
  memset(pIter, 0, sizeof(*pIter));
  pIter->pSeg = pSeg;

  /* This block sets stack variable iPg to the leaf page number that may
  ** contain term (pTerm/nTerm), if it is present in the segment. */
  if( p->pIdxSelect==0 ){
    Fts5Config *pConfig = p->pConfig;
    fts5IndexPrepareStmt(p, &p->pIdxSelect, sqlite3_mprintf(
          "SELECT pgno FROM '%q'.'%q_idx' WHERE "
          "segid=? AND term<=? ORDER BY term DESC LIMIT 1",
          pConfig->zDb, pConfig->zName
    ));
  }
  if( p->rc ) return;
  sqlite3_bind_int(p->pIdxSelect, 1, pSeg->iSegid);
  sqlite3_bind_blob(p->pIdxSelect, 2, pTerm, nTerm, SQLITE_STATIC);
  if( SQLITE_ROW==sqlite3_step(p->pIdxSelect) ){
    i64 val = sqlite3_column_int(p->pIdxSelect, 0);
    iPg = (int)(val>>1);
    bDlidx = (val & 0x0001);
  }
  p->rc = sqlite3_reset(p->pIdxSelect);

  if( iPg<pSeg->pgnoFirst ){
    iPg = pSeg->pgnoFirst;
    bDlidx = 0;
  }

  pIter->iLeafPgno = iPg - 1;
................................................................................
#ifdef SQLITE_DEBUG
      for(iLvl=0; iLvl<pStruct->nLevel; iLvl++){
        for(iSeg=0; iSeg<pStruct->aLevel[iLvl].nSeg; iSeg++){
          assert( iSegid!=pStruct->aLevel[iLvl].aSeg[iSeg].iSegid );
        }
      }
      assert( iSegid>0 && iSegid<=FTS5_MAX_SEGMENT );











#endif
    }
  }

  return iSegid;
}

................................................................................
  }
}

static void fts5WriteFlushLeaf(Fts5Index *p, Fts5SegWriter *pWriter){
  static const u8 zero[] = { 0x00, 0x00, 0x00, 0x00 };
  Fts5PageWriter *pPage = &pWriter->writer;
  i64 iRowid;




  assert( (pPage->pgidx.n==0)==(pWriter->bFirstTermInPage) );

  /* Set the szLeaf header field. */
  assert( 0==fts5GetU16(&pPage->buf.p[2]) );
  fts5PutU16(&pPage->buf.p[2], (u16)pPage->buf.n);

................................................................................
  int iSegid;
  int pgnoLast = 0;                 /* Last leaf page number in segment */

  /* Obtain a reference to the index structure and allocate a new segment-id
  ** for the new level-0 segment.  */
  pStruct = fts5StructureRead(p);
  iSegid = fts5AllocateSegid(p, pStruct);


  if( iSegid ){
    const int pgsz = p->pConfig->pgsz;
    int eDetail = p->pConfig->eDetail;
    Fts5StructureSegment *pSeg;   /* New segment within pStruct */
    Fts5Buffer *pBuf;             /* Buffer in which to assemble leaf page */
    Fts5Buffer *pPgidx;           /* Buffer in which to assemble pgidx */
................................................................................
  }

  nByte += (pStruct->nLevel+1) * sizeof(Fts5StructureLevel);
  pNew = (Fts5Structure*)sqlite3Fts5MallocZero(&p->rc, nByte);

  if( pNew ){
    Fts5StructureLevel *pLvl;
    int nByte = nSeg * sizeof(Fts5StructureSegment);
    pNew->nLevel = pStruct->nLevel+1;
    pNew->nRef = 1;
    pNew->nWriteCounter = pStruct->nWriteCounter;
    pLvl = &pNew->aLevel[pStruct->nLevel];
    pLvl->aSeg = (Fts5StructureSegment*)sqlite3Fts5MallocZero(&p->rc, nByte);
    if( pLvl->aSeg ){
      int iLvl, iSeg;
................................................................................
int sqlite3Fts5IndexOptimize(Fts5Index *p){
  Fts5Structure *pStruct;
  Fts5Structure *pNew = 0;

  assert( p->rc==SQLITE_OK );
  fts5IndexFlush(p);
  pStruct = fts5StructureRead(p);


  if( pStruct ){
    pNew = fts5IndexOptimizeStruct(p, pStruct);
  }
  fts5StructureRelease(pStruct);

  assert( pNew==0 || pNew->nSegment>0 );
................................................................................
** This is called to implement the special "VALUES('merge', $nMerge)"
** INSERT command.
*/
int sqlite3Fts5IndexMerge(Fts5Index *p, int nMerge){
  Fts5Structure *pStruct = fts5StructureRead(p);
  if( pStruct ){
    int nMin = p->pConfig->nUsermerge;

    if( nMerge<0 ){
      Fts5Structure *pNew = fts5IndexOptimizeStruct(p, pStruct);
      fts5StructureRelease(pStruct);
      pStruct = pNew;
      nMin = 2;
      nMerge = nMerge*-1;
    }
................................................................................
** to the database. Additionally, assume that the contents of the %_data
** table may have changed on disk. So any in-memory caches of %_data 
** records must be invalidated.
*/
int sqlite3Fts5IndexRollback(Fts5Index *p){
  fts5CloseReader(p);
  fts5IndexDiscardData(p);

  /* assert( p->rc==SQLITE_OK ); */
  return SQLITE_OK;
}

/*
** The %_data table is completely empty when this function is called. This
** function populates it with the initial structure objects for each index,
** and the initial version of the "averages" record (a zero-byte blob).
*/
int sqlite3Fts5IndexReinit(Fts5Index *p){
  Fts5Structure s;

  memset(&s, 0, sizeof(Fts5Structure));
  fts5DataWrite(p, FTS5_AVERAGES_ROWID, (const u8*)"", 0);
  fts5StructureWrite(p, &s);
  return fts5IndexReturn(p);
}

/*
................................................................................
/*
** Close a handle opened by an earlier call to sqlite3Fts5IndexOpen().
*/
int sqlite3Fts5IndexClose(Fts5Index *p){
  int rc = SQLITE_OK;
  if( p ){
    assert( p->pReader==0 );

    sqlite3_finalize(p->pWriter);
    sqlite3_finalize(p->pDeleter);
    sqlite3_finalize(p->pIdxWriter);
    sqlite3_finalize(p->pIdxDeleter);
    sqlite3_finalize(p->pIdxSelect);

    sqlite3Fts5HashFree(p->pHash);
    sqlite3_free(p->zDataTbl);
    sqlite3_free(p);
  }
  return rc;
}

................................................................................
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(
        db, "fts5_rowid", -1, SQLITE_UTF8, 0, fts5RowidFunction, 0, 0
    );
  }
  return rc;
}

  sqlite3_blob *pReader;          /* RO incr-blob open on %_data table */
  sqlite3_stmt *pWriter;          /* "INSERT ... %_data VALUES(?,?)" */
  sqlite3_stmt *pDeleter;         /* "DELETE FROM %_data ... id>=? AND id<=?" */
  sqlite3_stmt *pIdxWriter;       /* "INSERT ... %_idx VALUES(?,?,?,?)" */
  sqlite3_stmt *pIdxDeleter;      /* "DELETE FROM %_idx WHERE segid=? */
  sqlite3_stmt *pIdxSelect;
  int nRead;                      /* Total number of blocks read */

  sqlite3_stmt *pDataVersion;
  i64 iStructVersion;             /* data_version when pStruct read */
  Fts5Structure *pStruct;         /* Current db structure (or NULL) */
};

struct Fts5DoclistIter {
  u8 *aEof;                       /* Pointer to 1 byte past end of doclist */

  /* Output variables. aPoslist==0 at EOF */
  i64 iRowid;
................................................................................
      }
      pLvl->aSeg = aNew;
    }else{
      *pRc = SQLITE_NOMEM;
    }
  }
}

static Fts5Structure *fts5StructureReadUncached(Fts5Index *p){
  Fts5Structure *pRet = 0;
  Fts5Config *pConfig = p->pConfig;
  int iCookie;                    /* Configuration cookie */
  Fts5Data *pData;

  pData = fts5DataRead(p, FTS5_STRUCTURE_ROWID);
  if( p->rc==SQLITE_OK ){
    /* TODO: Do we need this if the leaf-index is appended? Probably... */
    memset(&pData->p[pData->nn], 0, FTS5_DATA_PADDING);
    p->rc = fts5StructureDecode(pData->p, pData->nn, &iCookie, &pRet);
    if( p->rc==SQLITE_OK && pConfig->iCookie!=iCookie ){
      p->rc = sqlite3Fts5ConfigLoad(pConfig, iCookie);
    }
    fts5DataRelease(pData);
    if( p->rc!=SQLITE_OK ){
      fts5StructureRelease(pRet);
      pRet = 0;
    }
  }

  return pRet;
}

static i64 fts5IndexDataVersion(Fts5Index *p){
  i64 iVersion = 0;

  if( p->rc==SQLITE_OK ){
    if( p->pDataVersion==0 ){
      p->rc = fts5IndexPrepareStmt(p, &p->pDataVersion, 
          sqlite3_mprintf("PRAGMA %Q.data_version", p->pConfig->zDb)
          );
      if( p->rc ) return 0;
    }

    if( SQLITE_ROW==sqlite3_step(p->pDataVersion) ){
      iVersion = sqlite3_column_int64(p->pDataVersion, 0);
    }
    p->rc = sqlite3_reset(p->pDataVersion);
  }

  return iVersion;
}

/*
** Read, deserialize and return the structure record.
**
** The Fts5Structure.aLevel[] and each Fts5StructureLevel.aSeg[] array
** are over-allocated as described for function fts5StructureDecode() 
** above.
**
** If an error occurs, NULL is returned and an error code left in the
** Fts5Index handle. If an error has already occurred when this function
** is called, it is a no-op.
*/
static Fts5Structure *fts5StructureRead(Fts5Index *p){










  if( p->pStruct==0 ){
    p->iStructVersion = fts5IndexDataVersion(p);
    if( p->rc==SQLITE_OK ){

      p->pStruct = fts5StructureReadUncached(p);
    }
  }


#if 0
  else{
    Fts5Structure *pTest = fts5StructureReadUncached(p);
    if( pTest ){
      int i, j;
      assert_nc( p->pStruct->nSegment==pTest->nSegment );
      assert_nc( p->pStruct->nLevel==pTest->nLevel );
      for(i=0; i<pTest->nLevel; i++){
        assert_nc( p->pStruct->aLevel[i].nMerge==pTest->aLevel[i].nMerge );
        assert_nc( p->pStruct->aLevel[i].nSeg==pTest->aLevel[i].nSeg );
        for(j=0; j<pTest->aLevel[i].nSeg; j++){
          Fts5StructureSegment *p1 = &pTest->aLevel[i].aSeg[j];
          Fts5StructureSegment *p2 = &p->pStruct->aLevel[i].aSeg[j];
          assert_nc( p1->iSegid==p2->iSegid );
          assert_nc( p1->pgnoFirst==p2->pgnoFirst );
          assert_nc( p1->pgnoLast==p2->pgnoLast );
        }
      }
      fts5StructureRelease(pTest);
    }
  }
#endif

  if( p->rc!=SQLITE_OK ) return 0;
  assert( p->iStructVersion!=0 );
  assert( p->pStruct!=0 );
  fts5StructureRef(p->pStruct);
  return p->pStruct;
}

static void fts5StructureInvalidate(Fts5Index *p){
  if( p->pStruct ){
    fts5StructureRelease(p->pStruct);
    p->pStruct = 0;
  }

}

/*
** Return the total number of segments in index structure pStruct. This
** function is only ever used as part of assert() conditions.
*/
#ifdef SQLITE_DEBUG
................................................................................
    pIter->iEndofDoclist = iTermOff + nExtra;
  }
  pIter->iPgidxOff = iPgidx;

  fts5SegIterLoadRowid(p, pIter);
  fts5SegIterLoadNPos(p, pIter);
}

static sqlite3_stmt *fts5IdxSelectStmt(Fts5Index *p){
  if( p->pIdxSelect==0 ){
    Fts5Config *pConfig = p->pConfig;
    fts5IndexPrepareStmt(p, &p->pIdxSelect, sqlite3_mprintf(
          "SELECT pgno FROM '%q'.'%q_idx' WHERE "
          "segid=? AND term<=? ORDER BY term DESC LIMIT 1",
          pConfig->zDb, pConfig->zName
    ));
  }
  return p->pIdxSelect;
}

/*
** Initialize the object pIter to point to term pTerm/nTerm within segment
** pSeg. If there is no such term in the index, the iterator is set to EOF.
**
** If an error occurs, Fts5Index.rc is set to an appropriate error code. If 
** an error has already occurred when this function is called, it is a no-op.
................................................................................
  int flags,                      /* Mask of FTS5INDEX_XXX flags */
  Fts5StructureSegment *pSeg,     /* Description of segment */
  Fts5SegIter *pIter              /* Object to populate */
){
  int iPg = 1;
  int bGe = (flags & FTS5INDEX_QUERY_SCAN);
  int bDlidx = 0;                 /* True if there is a doclist-index */
  sqlite3_stmt *pIdxSelect = 0;

  assert( bGe==0 || (flags & FTS5INDEX_QUERY_DESC)==0 );
  assert( pTerm && nTerm );
  memset(pIter, 0, sizeof(*pIter));
  pIter->pSeg = pSeg;

  /* This block sets stack variable iPg to the leaf page number that may
  ** contain term (pTerm/nTerm), if it is present in the segment. */
  pIdxSelect = fts5IdxSelectStmt(p);







  if( p->rc ) return;
  sqlite3_bind_int(pIdxSelect, 1, pSeg->iSegid);
  sqlite3_bind_blob(pIdxSelect, 2, pTerm, nTerm, SQLITE_STATIC);
  if( SQLITE_ROW==sqlite3_step(pIdxSelect) ){
    i64 val = sqlite3_column_int(pIdxSelect, 0);
    iPg = (int)(val>>1);
    bDlidx = (val & 0x0001);
  }
  p->rc = sqlite3_reset(pIdxSelect);

  if( iPg<pSeg->pgnoFirst ){
    iPg = pSeg->pgnoFirst;
    bDlidx = 0;
  }

  pIter->iLeafPgno = iPg - 1;
................................................................................
#ifdef SQLITE_DEBUG
      for(iLvl=0; iLvl<pStruct->nLevel; iLvl++){
        for(iSeg=0; iSeg<pStruct->aLevel[iLvl].nSeg; iSeg++){
          assert( iSegid!=pStruct->aLevel[iLvl].aSeg[iSeg].iSegid );
        }
      }
      assert( iSegid>0 && iSegid<=FTS5_MAX_SEGMENT );

      {
        sqlite3_stmt *pIdxSelect = fts5IdxSelectStmt(p);
        if( p->rc==SQLITE_OK ){
          u8 aBlob[2] = {0xff, 0xff};
          sqlite3_bind_int(pIdxSelect, 1, iSegid);
          sqlite3_bind_blob(pIdxSelect, 2, aBlob, 2, SQLITE_STATIC);
          assert( sqlite3_step(pIdxSelect)!=SQLITE_ROW );
          p->rc = sqlite3_reset(pIdxSelect);
        }
      }
#endif
    }
  }

  return iSegid;
}

................................................................................
  }
}

static void fts5WriteFlushLeaf(Fts5Index *p, Fts5SegWriter *pWriter){
  static const u8 zero[] = { 0x00, 0x00, 0x00, 0x00 };
  Fts5PageWriter *pPage = &pWriter->writer;
  i64 iRowid;

static int nCall = 0;
nCall++;

  assert( (pPage->pgidx.n==0)==(pWriter->bFirstTermInPage) );

  /* Set the szLeaf header field. */
  assert( 0==fts5GetU16(&pPage->buf.p[2]) );
  fts5PutU16(&pPage->buf.p[2], (u16)pPage->buf.n);

................................................................................
  int iSegid;
  int pgnoLast = 0;                 /* Last leaf page number in segment */

  /* Obtain a reference to the index structure and allocate a new segment-id
  ** for the new level-0 segment.  */
  pStruct = fts5StructureRead(p);
  iSegid = fts5AllocateSegid(p, pStruct);
  fts5StructureInvalidate(p);

  if( iSegid ){
    const int pgsz = p->pConfig->pgsz;
    int eDetail = p->pConfig->eDetail;
    Fts5StructureSegment *pSeg;   /* New segment within pStruct */
    Fts5Buffer *pBuf;             /* Buffer in which to assemble leaf page */
    Fts5Buffer *pPgidx;           /* Buffer in which to assemble pgidx */
................................................................................
  }

  nByte += (pStruct->nLevel+1) * sizeof(Fts5StructureLevel);
  pNew = (Fts5Structure*)sqlite3Fts5MallocZero(&p->rc, nByte);

  if( pNew ){
    Fts5StructureLevel *pLvl;
    nByte = nSeg * sizeof(Fts5StructureSegment);
    pNew->nLevel = pStruct->nLevel+1;
    pNew->nRef = 1;
    pNew->nWriteCounter = pStruct->nWriteCounter;
    pLvl = &pNew->aLevel[pStruct->nLevel];
    pLvl->aSeg = (Fts5StructureSegment*)sqlite3Fts5MallocZero(&p->rc, nByte);
    if( pLvl->aSeg ){
      int iLvl, iSeg;
................................................................................
int sqlite3Fts5IndexOptimize(Fts5Index *p){
  Fts5Structure *pStruct;
  Fts5Structure *pNew = 0;

  assert( p->rc==SQLITE_OK );
  fts5IndexFlush(p);
  pStruct = fts5StructureRead(p);
  fts5StructureInvalidate(p);

  if( pStruct ){
    pNew = fts5IndexOptimizeStruct(p, pStruct);
  }
  fts5StructureRelease(pStruct);

  assert( pNew==0 || pNew->nSegment>0 );
................................................................................
** This is called to implement the special "VALUES('merge', $nMerge)"
** INSERT command.
*/
int sqlite3Fts5IndexMerge(Fts5Index *p, int nMerge){
  Fts5Structure *pStruct = fts5StructureRead(p);
  if( pStruct ){
    int nMin = p->pConfig->nUsermerge;
    fts5StructureInvalidate(p);
    if( nMerge<0 ){
      Fts5Structure *pNew = fts5IndexOptimizeStruct(p, pStruct);
      fts5StructureRelease(pStruct);
      pStruct = pNew;
      nMin = 2;
      nMerge = nMerge*-1;
    }
................................................................................
** to the database. Additionally, assume that the contents of the %_data
** table may have changed on disk. So any in-memory caches of %_data 
** records must be invalidated.
*/
int sqlite3Fts5IndexRollback(Fts5Index *p){
  fts5CloseReader(p);
  fts5IndexDiscardData(p);
  fts5StructureInvalidate(p);
  /* assert( p->rc==SQLITE_OK ); */
  return SQLITE_OK;
}

/*
** The %_data table is completely empty when this function is called. This
** function populates it with the initial structure objects for each index,
** and the initial version of the "averages" record (a zero-byte blob).
*/
int sqlite3Fts5IndexReinit(Fts5Index *p){
  Fts5Structure s;
  fts5StructureInvalidate(p);
  memset(&s, 0, sizeof(Fts5Structure));
  fts5DataWrite(p, FTS5_AVERAGES_ROWID, (const u8*)"", 0);
  fts5StructureWrite(p, &s);
  return fts5IndexReturn(p);
}

/*
................................................................................
/*
** Close a handle opened by an earlier call to sqlite3Fts5IndexOpen().
*/
int sqlite3Fts5IndexClose(Fts5Index *p){
  int rc = SQLITE_OK;
  if( p ){
    assert( p->pReader==0 );
    fts5StructureInvalidate(p);
    sqlite3_finalize(p->pWriter);
    sqlite3_finalize(p->pDeleter);
    sqlite3_finalize(p->pIdxWriter);
    sqlite3_finalize(p->pIdxDeleter);
    sqlite3_finalize(p->pIdxSelect);
    sqlite3_finalize(p->pDataVersion);
    sqlite3Fts5HashFree(p->pHash);
    sqlite3_free(p->zDataTbl);
    sqlite3_free(p);
  }
  return rc;
}

................................................................................
  if( rc==SQLITE_OK ){
    rc = sqlite3_create_function(
        db, "fts5_rowid", -1, SQLITE_UTF8, 0, fts5RowidFunction, 0, 0
    );
  }
  return rc;
}


int sqlite3Fts5IndexReset(Fts5Index *p){
  assert( p->pStruct==0 || p->iStructVersion!=0 );
  if( fts5IndexDataVersion(p)!=p->iStructVersion ){
    fts5StructureInvalidate(p);
  }
  return fts5IndexReturn(p);
}

      pInfo->aConstraintUsage[pC->iConsIndex].omit = (unsigned char)pC->omit;
    }
  }

  pInfo->idxNum = idxFlags;
  return SQLITE_OK;
}









/*
** Implementation of xOpen method.
*/
static int fts5OpenMethod(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCsr){
  Fts5Table *pTab = (Fts5Table*)pVTab;
  Fts5Config *pConfig = pTab->pConfig;
  Fts5Cursor *pCsr;               /* New cursor object */
  int nByte;                      /* Bytes of space to allocate */
  int rc = SQLITE_OK;             /* Return code */



  nByte = sizeof(Fts5Cursor) + pConfig->nCol * sizeof(int);
  pCsr = (Fts5Cursor*)sqlite3_malloc(nByte);
  if( pCsr ){
    Fts5Global *pGlobal = pTab->pGlobal;
    memset(pCsr, 0, nByte);
    pCsr->aColumnSize = (int*)&pCsr[1];
    pCsr->pNext = pGlobal->pCsr;
    pGlobal->pCsr = pCsr;
    pCsr->iCsrId = ++pGlobal->iNextId;
  }else{
    rc = SQLITE_NOMEM;

  }
  *ppCsr = (sqlite3_vtab_cursor*)pCsr;
  return rc;
}

static int fts5StmtType(Fts5Cursor *pCsr){
  if( pCsr->ePlan==FTS5_PLAN_SCAN ){
................................................................................
  return rc;
}

/*
** Implementation of xBegin() method. 
*/
static int fts5BeginMethod(sqlite3_vtab *pVtab){
  UNUSED_PARAM(pVtab);  /* Call below is a no-op for NDEBUG builds */
  fts5CheckTransactionState((Fts5Table*)pVtab, FTS5_BEGIN, 0);

  return SQLITE_OK;
}

/*
** Implementation of xCommit() method. This is a no-op. The contents of
** the pending-terms hash-table have already been flushed into the database
** by fts5SyncMethod().

      pInfo->aConstraintUsage[pC->iConsIndex].omit = (unsigned char)pC->omit;
    }
  }

  pInfo->idxNum = idxFlags;
  return SQLITE_OK;
}

static int fts5NewTransaction(Fts5Table *pTab){
  Fts5Cursor *pCsr;
  for(pCsr=pTab->pGlobal->pCsr; pCsr; pCsr=pCsr->pNext){
    if( pCsr->base.pVtab==(sqlite3_vtab*)pTab ) return SQLITE_OK;
  }
  return sqlite3Fts5StorageReset(pTab->pStorage);
}

/*
** Implementation of xOpen method.
*/
static int fts5OpenMethod(sqlite3_vtab *pVTab, sqlite3_vtab_cursor **ppCsr){
  Fts5Table *pTab = (Fts5Table*)pVTab;
  Fts5Config *pConfig = pTab->pConfig;
  Fts5Cursor *pCsr = 0;           /* New cursor object */
  int nByte;                      /* Bytes of space to allocate */
  int rc;                         /* Return code */

  rc = fts5NewTransaction(pTab);
  if( rc==SQLITE_OK ){
    nByte = sizeof(Fts5Cursor) + pConfig->nCol * sizeof(int);
    pCsr = (Fts5Cursor*)sqlite3_malloc(nByte);
    if( pCsr ){
      Fts5Global *pGlobal = pTab->pGlobal;
      memset(pCsr, 0, nByte);
      pCsr->aColumnSize = (int*)&pCsr[1];
      pCsr->pNext = pGlobal->pCsr;
      pGlobal->pCsr = pCsr;
      pCsr->iCsrId = ++pGlobal->iNextId;
    }else{
      rc = SQLITE_NOMEM;
    }
  }
  *ppCsr = (sqlite3_vtab_cursor*)pCsr;
  return rc;
}

static int fts5StmtType(Fts5Cursor *pCsr){
  if( pCsr->ePlan==FTS5_PLAN_SCAN ){
................................................................................
  return rc;
}

/*
** Implementation of xBegin() method. 
*/
static int fts5BeginMethod(sqlite3_vtab *pVtab){

  fts5CheckTransactionState((Fts5Table*)pVtab, FTS5_BEGIN, 0);
  fts5NewTransaction((Fts5Table*)pVtab);
  return SQLITE_OK;
}

/*
** Implementation of xCommit() method. This is a no-op. The contents of
** the pending-terms hash-table have already been flushed into the database
** by fts5SyncMethod().

  int nToken,                     /* Size of token in bytes */
  int iUnused1,                   /* Start offset of token */
  int iUnused2                    /* End offset of token */
){
  Fts5InsertCtx *pCtx = (Fts5InsertCtx*)pContext;
  Fts5Index *pIdx = pCtx->pStorage->pIndex;
  UNUSED_PARAM2(iUnused1, iUnused2);

  if( (tflags & FTS5_TOKEN_COLOCATED)==0 || pCtx->szCol==0 ){
    pCtx->szCol++;
  }
  return sqlite3Fts5IndexWrite(pIdx, pCtx->iCol, pCtx->szCol-1, pToken, nToken);
}

/*
................................................................................
int sqlite3Fts5StorageOptimize(Fts5Storage *p){
  return sqlite3Fts5IndexOptimize(p->pIndex);
}

int sqlite3Fts5StorageMerge(Fts5Storage *p, int nMerge){
  return sqlite3Fts5IndexMerge(p->pIndex, nMerge);
}





/*
** Allocate a new rowid. This is used for "external content" tables when
** a NULL value is inserted into the rowid column. The new rowid is allocated
** by inserting a dummy row into the %_docsize table. The dummy will be
** overwritten later.
**
................................................................................
  int bPresent;
  int ii;
  int rc = SQLITE_OK;
  int iPos;
  int iCol;

  UNUSED_PARAM2(iUnused1, iUnused2);


  if( (tflags & FTS5_TOKEN_COLOCATED)==0 || pCtx->szCol==0 ){
    pCtx->szCol++;
  }

  switch( pCtx->pConfig->eDetail ){
    case FTS5_DETAIL_FULL:

  int nToken,                     /* Size of token in bytes */
  int iUnused1,                   /* Start offset of token */
  int iUnused2                    /* End offset of token */
){
  Fts5InsertCtx *pCtx = (Fts5InsertCtx*)pContext;
  Fts5Index *pIdx = pCtx->pStorage->pIndex;
  UNUSED_PARAM2(iUnused1, iUnused2);
  if( nToken>FTS5_MAX_TOKEN_SIZE ) nToken = FTS5_MAX_TOKEN_SIZE;
  if( (tflags & FTS5_TOKEN_COLOCATED)==0 || pCtx->szCol==0 ){
    pCtx->szCol++;
  }
  return sqlite3Fts5IndexWrite(pIdx, pCtx->iCol, pCtx->szCol-1, pToken, nToken);
}

/*
................................................................................
int sqlite3Fts5StorageOptimize(Fts5Storage *p){
  return sqlite3Fts5IndexOptimize(p->pIndex);
}

int sqlite3Fts5StorageMerge(Fts5Storage *p, int nMerge){
  return sqlite3Fts5IndexMerge(p->pIndex, nMerge);
}

int sqlite3Fts5StorageReset(Fts5Storage *p){
  return sqlite3Fts5IndexReset(p->pIndex);
}

/*
** Allocate a new rowid. This is used for "external content" tables when
** a NULL value is inserted into the rowid column. The new rowid is allocated
** by inserting a dummy row into the %_docsize table. The dummy will be
** overwritten later.
**
................................................................................
  int bPresent;
  int ii;
  int rc = SQLITE_OK;
  int iPos;
  int iCol;

  UNUSED_PARAM2(iUnused1, iUnused2);
  if( nToken>FTS5_MAX_TOKEN_SIZE ) nToken = FTS5_MAX_TOKEN_SIZE;

  if( (tflags & FTS5_TOKEN_COLOCATED)==0 || pCtx->szCol==0 ){
    pCtx->szCol++;
  }

  switch( pCtx->pConfig->eDetail ){
    case FTS5_DETAIL_FULL:

  set fd [db incrblob main n1_data block 10]
  fconfigure $fd -encoding binary -translation binary
  puts -nonewline $fd "\x44\x45"
  close $fd
}
db func funk funk







do_catchsql_test 16.2 {
  SELECT funk(), bm25(n1), funk() FROM n1 WHERE n1 MATCH 'a+b+c+d'

} {1 {SQL logic error or missing database}}

#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 17.1 {
  CREATE VIRTUAL TABLE b2 USING fts5(x, detail=%DETAIL%);
  INSERT INTO b2 VALUES('a');

  set fd [db incrblob main n1_data block 10]
  fconfigure $fd -encoding binary -translation binary
  puts -nonewline $fd "\x44\x45"
  close $fd
}
db func funk funk

# This test case corrupts the structure record within the first invocation
# of function funk(). Which used to cause the bm25() function to throw an
# exception. But since bm25() can now used the cached structure record,
# it never sees the corruption introduced by funk() and so the following 
# statement no longer fails.
#
do_catchsql_test 16.2 {
  SELECT funk(), bm25(n1), funk() FROM n1 WHERE n1 MATCH 'a+b+c+d'
} {0 {{} -1e-06 {}}}
# {1 {SQL logic error or missing database}}

#-------------------------------------------------------------------------
#
reset_db
do_execsql_test 17.1 {
  CREATE VIRTUAL TABLE b2 USING fts5(x, detail=%DETAIL%);
  INSERT INTO b2 VALUES('a');

for {set i 1} {1} {incr i} {
  set struct [db one {SELECT block FROM t1_data WHERE id=10}]
  binary scan $struct c* var
  set end [lindex $var end]
  if {$end<=$i} break
  lset var end [expr $end - $i]
  set struct [binary format c* $var]




  db eval {
    BEGIN;
    UPDATE t1_data SET block = $struct WHERE id=10;
  }
  do_test 4.1.$i {
    incr nErr [catch { db eval { SELECT rowid FROM t1 WHERE t1 MATCH 'x*' } }]
    set {} {}

for {set i 1} {1} {incr i} {
  set struct [db one {SELECT block FROM t1_data WHERE id=10}]
  binary scan $struct c* var
  set end [lindex $var end]
  if {$end<=$i} break
  lset var end [expr $end - $i]
  set struct [binary format c* $var]

  db close
  sqlite3 db test.db

  db eval {
    BEGIN;
    UPDATE t1_data SET block = $struct WHERE id=10;
  }
  do_test 4.1.$i {
    incr nErr [catch { db eval { SELECT rowid FROM t1 WHERE t1 MATCH 'x*' } }]
    set {} {}

# 2016 March 21
#
# 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 testing the FTS5 module.
#
# Specifically, that the fts5 module is deterministic. At one point, when
# segment ids were allocated using sqlite3_randomness(), this was not the
# case.
#

source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5aa
return_if_no_fts5 

proc do_determin_test {tn} {
  uplevel [list
    do_execsql_test $tn {
      SELECT (SELECT md5sum(id, block) FROM t1_data)==
             (SELECT md5sum(id, block) FROM t2_data),
             (SELECT md5sum(id, block) FROM t1_data)==
             (SELECT md5sum(id, block) FROM t3_data)
    } {1 1}
  ]
}

foreach_detail_mode $::testprefix {
  do_execsql_test 1.0 {
    CREATE VIRTUAL TABLE t1 USING fts5(a, b, prefix="1 2", detail=%DETAIL%);
    CREATE VIRTUAL TABLE t2 USING fts5(a, b, prefix="1 2", detail=%DETAIL%);
    CREATE VIRTUAL TABLE t3 USING fts5(a, b, prefix="1 2", detail=%DETAIL%);
  }

  do_test 1.1 {
    foreach t {t1 t2 t3} {
      execsql [string map [list TBL $t] {
        INSERT INTO TBL VALUES('a b c', 'd e f');
        INSERT INTO TBL VALUES('c1 c2 c3', 'c1 c2 c3');
        INSERT INTO TBL VALUES('xyzxyzxyz', 'xyzxyzxyz');
      }]
    }
  } {}

  do_determin_test 1.2

  do_test 1.3 {
    foreach t {t1 t2 t3} {
      execsql [string map [list TBL $t] {
        INSERT INTO TBL(TBL) VALUES('optimize');
      }]
    }
  } {}

  do_determin_test 1.4
}


finish_test

do_execsql_test 3.2 {
  SELECT rowid FROM abc WHERE abc 
  MATCH 'IteratorpItercurrentlypointstothefirstrowidofadoclist' 
  ORDER BY rowid DESC;
} {16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1}

do_execsql_test 3.2 {
  INSERT INTO abc(abc) VALUES('integrity-check');
  INSERT INTO abc(abc) VALUES('optimize');
  INSERT INTO abc(abc) VALUES('integrity-check');
}

set v [lindex $vocab 0]
set i 0
foreach v $vocab {
  do_execsql_test 3.3.[incr i] {
    SELECT rowid FROM abc WHERE abc MATCH $v
  } {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16}
}

} ;# foreach_detail_mode



finish_test

do_execsql_test 3.2 {
  SELECT rowid FROM abc WHERE abc 
  MATCH 'IteratorpItercurrentlypointstothefirstrowidofadoclist' 
  ORDER BY rowid DESC;
} {16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1}

do_execsql_test 3.3 {
  INSERT INTO abc(abc) VALUES('integrity-check');
  INSERT INTO abc(abc) VALUES('optimize');
  INSERT INTO abc(abc) VALUES('integrity-check');
}

set v [lindex $vocab 0]
set i 0
foreach v $vocab {
  do_execsql_test 3.4.[incr i] {
    SELECT rowid FROM abc WHERE abc MATCH $v
  } {1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16}
}

} ;# foreach_detail_mode



finish_test

}

set ::res [db eval {SELECT rowid, x1 FROM x1 WHERE x1 MATCH '*reads'}]

do_faultsim_test 4 -faults oom-* -body {
  db eval {SELECT rowid, x, x1 FROM x1 WHERE x1 MATCH '*reads'}
} -test {
  faultsim_test_result {0 {0 {} 4}}
}

#-------------------------------------------------------------------------
# An OOM within a query that uses a custom rank function.
#
reset_db
do_execsql_test 5.0 {

}

set ::res [db eval {SELECT rowid, x1 FROM x1 WHERE x1 MATCH '*reads'}]

do_faultsim_test 4 -faults oom-* -body {
  db eval {SELECT rowid, x, x1 FROM x1 WHERE x1 MATCH '*reads'}
} -test {
  faultsim_test_result {0 {0 {} 3}}
}

#-------------------------------------------------------------------------
# An OOM within a query that uses a custom rank function.
#
reset_db
do_execsql_test 5.0 {

# 2016 March 17
#
# 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.
#
#*************************************************************************
#

source [file join [file dirname [info script]] fts5_common.tcl]
source $testdir/lock_common.tcl

set testprefix fts5multiclient
return_if_no_fts5

foreach_detail_mode $testprefix {

do_multiclient_test tn {

  do_test 1.$tn.1 {
    sql1 { CREATE VIRTUAL TABLE t1 USING fts5(x, detail=%DETAIL%) }
    sql1 { INSERT INTO t1 VALUES('a b c') }
    sql2 { SELECT rowid FROM t1('b') }
  } {1}

  do_test 1.$tn.2 {
    sql2 { INSERT INTO t1 VALUES('a b c') }
    sql1 { SELECT rowid FROM t1('b') }
  } {1 2}

  do_test 1.$tn.3 {
    sql2 { INSERT INTO t1 VALUES('a b c') }
    sql1 { SELECT rowid FROM t1('b') }
  } {1 2 3}

  do_test 1.$tn.4 {
    sql2 { INSERT INTO t1 VALUES('a b c') }
    sql1 { INSERT INTO t1 VALUES('a b c') }
    sql3 { INSERT INTO t1(t1) VALUES('integrity-check') }
  } {}

};# do_multiclient_test
};# foreach_detail_mode
finish_test

}
do_test 14.2 { 
  fts5_level_segs ttt 
} {1}

#-------------------------------------------------------------------------
db func rnddoc fts5_rnddoc
do_execsql_test 4.0 {
  CREATE VIRTUAL TABLE x1 USING fts5(x);
  INSERT INTO x1(x1, rank) VALUES('pgsz', 32);

  WITH ii(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM ii WHERE i<10 )
  INSERT INTO x1 SELECT rnddoc(5) FROM ii;
}

do_execsql_test 4.1 {
  SELECT rowid, x, x1 FROM x1 WHERE x1 MATCH '*reads'
} {0 {} 4}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 15.0 {
  CREATE VIRTUAL TABLE x2 USING fts5(x, prefix=1);
  INSERT INTO x2 VALUES('ab');
}
................................................................................
  execsql { INSERT INTO x1(x1) VALUES('optimize'); }
  execsql { DELETE FROM x1 WHERE rowid = 4; }
} {}
do_execsql_test 20.2 {
  INSERT INTO x1(x1) VALUES('optimize');
  INSERT INTO x1(x1) VALUES('integrity-check');
} {}





















finish_test

}
do_test 14.2 { 
  fts5_level_segs ttt 
} {1}

#-------------------------------------------------------------------------
db func rnddoc fts5_rnddoc
do_execsql_test 14.3 {
  CREATE VIRTUAL TABLE x1 USING fts5(x);
  INSERT INTO x1(x1, rank) VALUES('pgsz', 32);

  WITH ii(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM ii WHERE i<10 )
  INSERT INTO x1 SELECT rnddoc(5) FROM ii;
}

do_execsql_test 14.4 {
  SELECT rowid, x, x1 FROM x1 WHERE x1 MATCH '*reads'
} {0 {} 3}

#-------------------------------------------------------------------------
reset_db
do_execsql_test 15.0 {
  CREATE VIRTUAL TABLE x2 USING fts5(x, prefix=1);
  INSERT INTO x2 VALUES('ab');
}
................................................................................
  execsql { INSERT INTO x1(x1) VALUES('optimize'); }
  execsql { DELETE FROM x1 WHERE rowid = 4; }
} {}
do_execsql_test 20.2 {
  INSERT INTO x1(x1) VALUES('optimize');
  INSERT INTO x1(x1) VALUES('integrity-check');
} {}

#-------------------------------------------------------------------------
reset_db
set doc "a b [string repeat x 100000]"
do_execsql_test 21.0 {
  CREATE VIRTUAL TABLE x1 USING fts5(x);
  INSERT INTO x1(rowid, x) VALUES(11111, $doc);
  INSERT INTO x1(rowid, x) VALUES(11112, $doc);
}
do_execsql_test 21.1 {
  INSERT INTO x1(x1) VALUES('integrity-check');
}
do_execsql_test 21.2 {
  SELECT rowid FROM x1($doc);
} {11111 11112}
do_execsql_test 21.3 {
  DELETE FROM x1 WHERE rowid=11111;
  INSERT INTO x1(x1) VALUES('integrity-check');
  SELECT rowid FROM x1($doc);
} {11112}

finish_test

  */
  if( p->sharable ){
    int i;
    Btree *pSib;
    for(i=0; i<db->nDb; i++){
      if( (pSib = db->aDb[i].pBt)!=0 && pSib->sharable ){
        while( pSib->pPrev ){ pSib = pSib->pPrev; }
        if( p->pBt<pSib->pBt ){
          p->pNext = pSib;
          p->pPrev = 0;
          pSib->pPrev = p;
        }else{
          while( pSib->pNext && pSib->pNext->pBt<p->pBt ){
            pSib = pSib->pNext;
          }
          p->pNext = pSib->pNext;
          p->pPrev = pSib;
          if( p->pNext ){
            p->pNext->pPrev = p;
          }
................................................................................
  getCellInfo(pCur);
  aPayload = pCur->info.pPayload;
#ifdef SQLITE_DIRECT_OVERFLOW_READ
  bEnd = offset+amt==pCur->info.nPayload;
#endif
  assert( offset+amt <= pCur->info.nPayload );

  if( &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize] ){

    /* Trying to read or write past the end of the data is an error */




    return SQLITE_CORRUPT_BKPT;
  }

  /* Check if data must be read/written to/from the btree page itself. */
  if( offset<pCur->info.nLocal ){
    int a = amt;
    if( a+offset>pCur->info.nLocal ){

  */
  if( p->sharable ){
    int i;
    Btree *pSib;
    for(i=0; i<db->nDb; i++){
      if( (pSib = db->aDb[i].pBt)!=0 && pSib->sharable ){
        while( pSib->pPrev ){ pSib = pSib->pPrev; }
        if( (uptr)p->pBt<(uptr)pSib->pBt ){
          p->pNext = pSib;
          p->pPrev = 0;
          pSib->pPrev = p;
        }else{
          while( pSib->pNext && (uptr)pSib->pNext->pBt<(uptr)p->pBt ){
            pSib = pSib->pNext;
          }
          p->pNext = pSib->pNext;
          p->pPrev = pSib;
          if( p->pNext ){
            p->pNext->pPrev = p;
          }
................................................................................
  getCellInfo(pCur);
  aPayload = pCur->info.pPayload;
#ifdef SQLITE_DIRECT_OVERFLOW_READ
  bEnd = offset+amt==pCur->info.nPayload;
#endif
  assert( offset+amt <= pCur->info.nPayload );

  assert( aPayload > pPage->aData );
  if( (uptr)(aPayload - pPage->aData) > (pBt->usableSize - pCur->info.nLocal) ){
    /* Trying to read or write past the end of the data is an error.  The
    ** conditional above is really:
    **    &aPayload[pCur->info.nLocal] > &pPage->aData[pBt->usableSize]
    ** but is recast into its current form to avoid integer overflow problems
    */
    return SQLITE_CORRUPT_BKPT;
  }

  /* Check if data must be read/written to/from the btree page itself. */
  if( offset<pCur->info.nLocal ){
    int a = amt;
    if( a+offset>pCur->info.nLocal ){

  }
#endif
  z = sqlite3DbMallocRaw(db, pName->n + pType->n + 2);
  if( z==0 ) return;
  memcpy(z, pName->z, pName->n);
  z[pName->n] = 0;
  sqlite3Dequote(z);
  zType = z + sqlite3Strlen30(z) + 1;
  memcpy(zType, pType->z, pType->n);
  zType[pType->n] = 0;
  for(i=0; i<p->nCol; i++){
    if( sqlite3_stricmp(z, p->aCol[i].zName)==0 ){
      sqlite3ErrorMsg(pParse, "duplicate column name: %s", z);
      sqlite3DbFree(db, z);
      return;
    }
  }
................................................................................
 
  if( pType->n==0 ){
    /* If there is no type specified, columns have the default affinity
    ** 'BLOB'. */
    pCol->affinity = SQLITE_AFF_BLOB;
    pCol->szEst = 1;
  }else{



    pCol->affinity = sqlite3AffinityType(zType, &pCol->szEst);

  }
  p->nCol++;
  pParse->constraintName.n = 0;
}

/*
** This routine is called by the parser while in the middle of
................................................................................
  Parse *pParse,    /* Parsing context */
  ExprList *pList,  /* List of field names to be indexed */
  int onError,      /* What to do with a uniqueness conflict */
  int autoInc,      /* True if the AUTOINCREMENT keyword is present */
  int sortOrder     /* SQLITE_SO_ASC or SQLITE_SO_DESC */
){
  Table *pTab = pParse->pNewTable;
  const char *zName = 0;
  int iCol = -1, i;
  int nTerm;
  if( pTab==0 || IN_DECLARE_VTAB ) goto primary_key_exit;
  if( pTab->tabFlags & TF_HasPrimaryKey ){
    sqlite3ErrorMsg(pParse, 
      "table \"%s\" has more than one primary key", pTab->zName);
    goto primary_key_exit;
  }
  pTab->tabFlags |= TF_HasPrimaryKey;
  if( pList==0 ){
    iCol = pTab->nCol - 1;
    pTab->aCol[iCol].colFlags |= COLFLAG_PRIMKEY;
    zName = pTab->aCol[iCol].zName;
    nTerm = 1;
  }else{
    nTerm = pList->nExpr;
    for(i=0; i<nTerm; i++){
      Expr *pCExpr = sqlite3ExprSkipCollate(pList->a[i].pExpr);
      assert( pCExpr!=0 );
      sqlite3StringToId(pCExpr);
      if( pCExpr->op==TK_ID ){
        const char *zCName = pCExpr->u.zToken;
        for(iCol=0; iCol<pTab->nCol; iCol++){
          if( sqlite3StrICmp(zCName, pTab->aCol[iCol].zName)==0 ){
            pTab->aCol[iCol].colFlags |= COLFLAG_PRIMKEY;
            zName = pTab->aCol[iCol].zName;
            break;
          }
        }
      }
    }
  }
  if( nTerm==1
   && zName
   && sqlite3StrICmp(sqlite3StrNext(zName), "INTEGER")==0
   && sortOrder!=SQLITE_SO_DESC
  ){
    pTab->iPKey = iCol;
    pTab->keyConf = (u8)onError;
    assert( autoInc==0 || autoInc==1 );
    pTab->tabFlags |= autoInc*TF_Autoincrement;
    if( pList ) pParse->iPkSortOrder = pList->a[0].sortOrder;

  }
#endif
  z = sqlite3DbMallocRaw(db, pName->n + pType->n + 2);
  if( z==0 ) return;
  memcpy(z, pName->z, pName->n);
  z[pName->n] = 0;
  sqlite3Dequote(z);



  for(i=0; i<p->nCol; i++){
    if( sqlite3_stricmp(z, p->aCol[i].zName)==0 ){
      sqlite3ErrorMsg(pParse, "duplicate column name: %s", z);
      sqlite3DbFree(db, z);
      return;
    }
  }
................................................................................
 
  if( pType->n==0 ){
    /* If there is no type specified, columns have the default affinity
    ** 'BLOB'. */
    pCol->affinity = SQLITE_AFF_BLOB;
    pCol->szEst = 1;
  }else{
    zType = z + sqlite3Strlen30(z) + 1;
    memcpy(zType, pType->z, pType->n);
    zType[pType->n] = 0;
    pCol->affinity = sqlite3AffinityType(zType, &pCol->szEst);
    pCol->colFlags |= COLFLAG_HASTYPE;
  }
  p->nCol++;
  pParse->constraintName.n = 0;
}

/*
** This routine is called by the parser while in the middle of
................................................................................
  Parse *pParse,    /* Parsing context */
  ExprList *pList,  /* List of field names to be indexed */
  int onError,      /* What to do with a uniqueness conflict */
  int autoInc,      /* True if the AUTOINCREMENT keyword is present */
  int sortOrder     /* SQLITE_SO_ASC or SQLITE_SO_DESC */
){
  Table *pTab = pParse->pNewTable;
  Column *pCol = 0;
  int iCol = -1, i;
  int nTerm;
  if( pTab==0 || IN_DECLARE_VTAB ) goto primary_key_exit;
  if( pTab->tabFlags & TF_HasPrimaryKey ){
    sqlite3ErrorMsg(pParse, 
      "table \"%s\" has more than one primary key", pTab->zName);
    goto primary_key_exit;
  }
  pTab->tabFlags |= TF_HasPrimaryKey;
  if( pList==0 ){
    iCol = pTab->nCol - 1;
    pCol = &pTab->aCol[iCol];
    pCol->colFlags |= COLFLAG_PRIMKEY;
    nTerm = 1;
  }else{
    nTerm = pList->nExpr;
    for(i=0; i<nTerm; i++){
      Expr *pCExpr = sqlite3ExprSkipCollate(pList->a[i].pExpr);
      assert( pCExpr!=0 );
      sqlite3StringToId(pCExpr);
      if( pCExpr->op==TK_ID ){
        const char *zCName = pCExpr->u.zToken;
        for(iCol=0; iCol<pTab->nCol; iCol++){
          if( sqlite3StrICmp(zCName, pTab->aCol[iCol].zName)==0 ){
            pCol = &pTab->aCol[iCol];
            pCol->colFlags |= COLFLAG_PRIMKEY;
            break;
          }
        }
      }
    }
  }
  if( nTerm==1
   && pCol
   && sqlite3StrICmp(sqlite3ColumnType(pCol,""), "INTEGER")==0
   && sortOrder!=SQLITE_SO_DESC
  ){
    pTab->iPKey = iCol;
    pTab->keyConf = (u8)onError;
    assert( autoInc==0 || autoInc==1 );
    pTab->tabFlags |= autoInc*TF_Autoincrement;
    if( pList ) pParse->iPkSortOrder = pList->a[0].sortOrder;

  **     1. The specified column name was rowid", "oid" or "_rowid_" 
  **        and there is no explicitly declared IPK column. 
  **
  **     2. The table is not a view and the column name identified an 
  **        explicitly declared column. Copy meta information from *pCol.
  */ 
  if( pCol ){
    zDataType = sqlite3StrNext(pCol->zName);
    if( zDataType[0]==0 ) zDataType = 0;
    zCollSeq = pCol->zColl;
    notnull = pCol->notNull!=0;
    primarykey  = (pCol->colFlags & COLFLAG_PRIMKEY)!=0;
    autoinc = pTab->iPKey==iCol && (pTab->tabFlags & TF_Autoincrement)!=0;
  }else{
    zDataType = "INTEGER";
    primarykey = 1;

  **     1. The specified column name was rowid", "oid" or "_rowid_" 
  **        and there is no explicitly declared IPK column. 
  **
  **     2. The table is not a view and the column name identified an 
  **        explicitly declared column. Copy meta information from *pCol.
  */ 
  if( pCol ){
    zDataType = sqlite3ColumnType(pCol,0);

    zCollSeq = pCol->zColl;
    notnull = pCol->notNull!=0;
    primarykey  = (pCol->colFlags & COLFLAG_PRIMKEY)!=0;
    autoinc = pTab->iPKey==iCol && (pTab->tabFlags & TF_Autoincrement)!=0;
  }else{
    zDataType = "INTEGER";
    primarykey = 1;

}

/* 
** Return the number of bytes required to store a JournalFile that uses vfs
** pVfs to create the underlying on-disk files.
*/
int sqlite3JournalSize(sqlite3_vfs *pVfs){
  return MAX(pVfs->szOsFile, sizeof(MemJournal));
}

}

/* 
** Return the number of bytes required to store a JournalFile that uses vfs
** pVfs to create the underlying on-disk files.
*/
int sqlite3JournalSize(sqlite3_vfs *pVfs){
  return MAX(pVfs->szOsFile, (int)sizeof(MemJournal));
}

  if( pFile->ctrlFlags & UNIXFILE_NOLOCK ) return;

  rc = osFstat(pFile->h, &buf);
  if( rc!=0 ){
    sqlite3_log(SQLITE_WARNING, "cannot fstat db file %s", pFile->zPath);
    return;
  }
  if( buf.st_nlink==0 && (pFile->ctrlFlags & UNIXFILE_DELETE)==0 ){
    sqlite3_log(SQLITE_WARNING, "file unlinked while open: %s", pFile->zPath);
    return;
  }
  if( buf.st_nlink>1 ){
    sqlite3_log(SQLITE_WARNING, "multiple links to file: %s", pFile->zPath);
    return;
  }

  if( pFile->ctrlFlags & UNIXFILE_NOLOCK ) return;

  rc = osFstat(pFile->h, &buf);
  if( rc!=0 ){
    sqlite3_log(SQLITE_WARNING, "cannot fstat db file %s", pFile->zPath);
    return;
  }
  if( buf.st_nlink==0 ){
    sqlite3_log(SQLITE_WARNING, "file unlinked while open: %s", pFile->zPath);
    return;
  }
  if( buf.st_nlink>1 ){
    sqlite3_log(SQLITE_WARNING, "multiple links to file: %s", pFile->zPath);
    return;
  }

 *          data will almost certainly result in an immediate access violation.
 ******************************************************************************
 */
#ifndef SQLITE_WIN32_HEAP_CREATE
#  define SQLITE_WIN32_HEAP_CREATE    (TRUE)
#endif













/*
 * The initial size of the Win32-specific heap.  This value may be zero.
 */
#ifndef SQLITE_WIN32_HEAP_INIT_SIZE
#  define SQLITE_WIN32_HEAP_INIT_SIZE ((SQLITE_DEFAULT_CACHE_SIZE) * \
                                       (SQLITE_DEFAULT_PAGE_SIZE) + 4194304)
#endif

/*
 * The maximum size of the Win32-specific heap.  This value may be zero.
 */
#ifndef SQLITE_WIN32_HEAP_MAX_SIZE
................................................................................
  UNUSED_PARAMETER(pVfs);
  memset(zBuf, 0, nBuf);
  return nBuf;
#else
  EntropyGatherer e;
  UNUSED_PARAMETER(pVfs);
  memset(zBuf, 0, nBuf);
#if defined(_MSC_VER) && _MSC_VER>=1400
  rand_s((int*)zBuf); /* rand_s() is not available with MinGW */
#endif /* defined(_MSC_VER) && _MSC_VER>=1400 */
  e.a = (unsigned char*)zBuf;
  e.na = nBuf;
  e.nXor = 0;
  e.i = 0;
  {
    SYSTEMTIME x;

 *          data will almost certainly result in an immediate access violation.
 ******************************************************************************
 */
#ifndef SQLITE_WIN32_HEAP_CREATE
#  define SQLITE_WIN32_HEAP_CREATE    (TRUE)
#endif

/*
 * This is cache size used in the calculation of the initial size of the
 * Win32-specific heap.  It cannot be negative.
 */
#ifndef SQLITE_WIN32_CACHE_SIZE
#  if SQLITE_DEFAULT_CACHE_SIZE>=0
#    define SQLITE_WIN32_CACHE_SIZE (SQLITE_DEFAULT_CACHE_SIZE)
#  else
#    define SQLITE_WIN32_CACHE_SIZE (-(SQLITE_DEFAULT_CACHE_SIZE))
#  endif
#endif

/*
 * The initial size of the Win32-specific heap.  This value may be zero.
 */
#ifndef SQLITE_WIN32_HEAP_INIT_SIZE
#  define SQLITE_WIN32_HEAP_INIT_SIZE ((SQLITE_WIN32_CACHE_SIZE) * \
                                       (SQLITE_DEFAULT_PAGE_SIZE) + 4194304)
#endif

/*
 * The maximum size of the Win32-specific heap.  This value may be zero.
 */
#ifndef SQLITE_WIN32_HEAP_MAX_SIZE
................................................................................
  UNUSED_PARAMETER(pVfs);
  memset(zBuf, 0, nBuf);
  return nBuf;
#else
  EntropyGatherer e;
  UNUSED_PARAMETER(pVfs);
  memset(zBuf, 0, nBuf);
#if defined(_MSC_VER) && _MSC_VER>=1400 && !SQLITE_OS_WINCE
  rand_s((unsigned int*)zBuf); /* rand_s() is not available with MinGW */
#endif /* defined(_MSC_VER) && _MSC_VER>=1400 */
  e.a = (unsigned char*)zBuf;
  e.na = nBuf;
  e.nXor = 0;
  e.i = 0;
  {
    SYSTEMTIME x;

      Column *pCol;
      Index *pPk = sqlite3PrimaryKeyIndex(pTab);
      pParse->nMem = 6;
      sqlite3CodeVerifySchema(pParse, iDb);
      setAllColumnNames(v, 6, azCol); assert( 6==ArraySize(azCol) );
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
        const char *zName;
        if( IsHiddenColumn(pCol) ){
          nHidden++;
          continue;
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( pCol->pDflt==0 || pCol->pDflt->op==TK_SPAN );
        zName = pCol->zName;
        sqlite3VdbeMultiLoad(v, 1, "issisi",
               i-nHidden,
               zName,
               sqlite3StrNext(zName),

               pCol->notNull ? 1 : 0,
               pCol->pDflt ? pCol->pDflt->u.zToken : 0,
               k);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
      }
    }
  }

      Column *pCol;
      Index *pPk = sqlite3PrimaryKeyIndex(pTab);
      pParse->nMem = 6;
      sqlite3CodeVerifySchema(pParse, iDb);
      setAllColumnNames(v, 6, azCol); assert( 6==ArraySize(azCol) );
      sqlite3ViewGetColumnNames(pParse, pTab);
      for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){

        if( IsHiddenColumn(pCol) ){
          nHidden++;
          continue;
        }
        if( (pCol->colFlags & COLFLAG_PRIMKEY)==0 ){
          k = 0;
        }else if( pPk==0 ){
          k = 1;
        }else{
          for(k=1; k<=pTab->nCol && pPk->aiColumn[k-1]!=i; k++){}
        }
        assert( pCol->pDflt==0 || pCol->pDflt->op==TK_SPAN );

        sqlite3VdbeMultiLoad(v, 1, "issisi",
               i-nHidden,
               pCol->zName,

               sqlite3ColumnType(pCol,""),
               pCol->notNull ? 1 : 0,
               pCol->pDflt ? pCol->pDflt->u.zToken : 0,
               k);
        sqlite3VdbeAddOp2(v, OP_ResultRow, 1, 6);
      }
    }
  }

        assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
#ifdef SQLITE_ENABLE_COLUMN_METADATA
        if( iCol<0 ){
          zType = "INTEGER";
          zOrigCol = "rowid";
        }else{
          zOrigCol = pTab->aCol[iCol].zName;
          zType = sqlite3StrNext(zOrigCol);
          estWidth = pTab->aCol[iCol].szEst;
        }
        zOrigTab = pTab->zName;
        if( pNC->pParse ){
          int iDb = sqlite3SchemaToIndex(pNC->pParse->db, pTab->pSchema);
          zOrigDb = pNC->pParse->db->aDb[iDb].zName;
        }
#else
        if( iCol<0 ){
          zType = "INTEGER";
        }else{
          zType = sqlite3StrNext(pTab->aCol[iCol].zName);
          estWidth = pTab->aCol[iCol].szEst;
        }
#endif
      }
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY

        assert( iCol==-1 || (iCol>=0 && iCol<pTab->nCol) );
#ifdef SQLITE_ENABLE_COLUMN_METADATA
        if( iCol<0 ){
          zType = "INTEGER";
          zOrigCol = "rowid";
        }else{
          zOrigCol = pTab->aCol[iCol].zName;
          zType = sqlite3ColumnType(&pTab->aCol[iCol],0);
          estWidth = pTab->aCol[iCol].szEst;
        }
        zOrigTab = pTab->zName;
        if( pNC->pParse ){
          int iDb = sqlite3SchemaToIndex(pNC->pParse->db, pTab->pSchema);
          zOrigDb = pNC->pParse->db->aDb[iDb].zName;
        }
#else
        if( iCol<0 ){
          zType = "INTEGER";
        }else{
          zType = sqlite3ColumnType(&pTab->aCol[iCol],0);
          estWidth = pTab->aCol[iCol].szEst;
        }
#endif
      }
      break;
    }
#ifndef SQLITE_OMIT_SUBQUERY

# define SQLITE_INT_TO_PTR(X)  ((void*)(intptr_t)(X))
# define SQLITE_PTR_TO_INT(X)  ((int)(intptr_t)(X))
#else                          /* Generates a warning - but it always works */
# define SQLITE_INT_TO_PTR(X)  ((void*)(X))
# define SQLITE_PTR_TO_INT(X)  ((int)(X))
#endif

/*
** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to
** something between S (inclusive) and E (exclusive).
**
** In other words, S is a buffer and E is a pointer to the first byte after
** the end of buffer S.  This macro returns true if P points to something
** contained within the buffer S.
*/
#if defined(HAVE_STDINT_H)
# define SQLITE_WITHIN(P,S,E) \
    ((uintptr_t)(P)>=(uintptr_t)(S) && (uintptr_t)(P)<(uintptr_t)(E))
#else
# define SQLITE_WITHIN(P,S,E) ((P)>=(S) && (P)<(E))
#endif

/*
** A macro to hint to the compiler that a function should not be
** inlined.
*/
#if defined(__GNUC__)
#  define SQLITE_NOINLINE  __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
................................................................................
#ifndef offsetof
#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
#endif

/*
** Macros to compute minimum and maximum of two numbers.
*/

#define MIN(A,B) ((A)<(B)?(A):(B))


#define MAX(A,B) ((A)>(B)?(A):(B))


/*
** Swap two objects of type TYPE.
*/
#define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;}

/*
................................................................................
# elif defined(i386)     || defined(__i386__)   || defined(_M_IX86) ||    \
       defined(_M_ARM)   || defined(__arm__)    || defined(__x86)
#   define SQLITE_PTRSIZE 4
# else
#   define SQLITE_PTRSIZE 8
# endif
#endif






















/*
** Macros to determine whether the machine is big or little endian,
** and whether or not that determination is run-time or compile-time.
**
** For best performance, an attempt is made to guess at the byte-order
** using C-preprocessor macros.  If that is unsuccessful, or if
................................................................................
  u8 colFlags;     /* Boolean properties.  See COLFLAG_ defines below */
};

/* Allowed values for Column.colFlags:
*/
#define COLFLAG_PRIMKEY  0x0001    /* Column is part of the primary key */
#define COLFLAG_HIDDEN   0x0002    /* A hidden column in a virtual table */


/*
** A "Collating Sequence" is defined by an instance of the following
** structure. Conceptually, a collating sequence consists of a name and
** a comparison routine that defines the order of that sequence.
**
** If CollSeq.xCmp is NULL, it means that the
................................................................................
#endif

/*
** Internal function prototypes
*/
int sqlite3StrICmp(const char*,const char*);
int sqlite3Strlen30(const char*);
const char *sqlite3StrNext(const char*);
#define sqlite3StrNICmp sqlite3_strnicmp

int sqlite3MallocInit(void);
void sqlite3MallocEnd(void);
void *sqlite3Malloc(u64);
void *sqlite3MallocZero(u64);
void *sqlite3DbMallocZero(sqlite3*, u64);

# define SQLITE_INT_TO_PTR(X)  ((void*)(intptr_t)(X))
# define SQLITE_PTR_TO_INT(X)  ((int)(intptr_t)(X))
#else                          /* Generates a warning - but it always works */
# define SQLITE_INT_TO_PTR(X)  ((void*)(X))
# define SQLITE_PTR_TO_INT(X)  ((int)(X))
#endif
















/*
** A macro to hint to the compiler that a function should not be
** inlined.
*/
#if defined(__GNUC__)
#  define SQLITE_NOINLINE  __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
................................................................................
#ifndef offsetof
#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
#endif

/*
** Macros to compute minimum and maximum of two numbers.
*/
#ifndef MIN
# define MIN(A,B) ((A)<(B)?(A):(B))
#endif
#ifndef MAX
# define MAX(A,B) ((A)>(B)?(A):(B))
#endif

/*
** Swap two objects of type TYPE.
*/
#define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;}

/*
................................................................................
# elif defined(i386)     || defined(__i386__)   || defined(_M_IX86) ||    \
       defined(_M_ARM)   || defined(__arm__)    || defined(__x86)
#   define SQLITE_PTRSIZE 4
# else
#   define SQLITE_PTRSIZE 8
# endif
#endif

/* The uptr type is an unsigned integer large enough to hold a pointer
*/
#if defined(HAVE_STDINT_H)
  typedef uintptr_t uptr;
#elif SQLITE_PTRSIZE==4
  typedef u32 uptr;
#else
  typedef u64 uptr;
#endif

/*
** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to
** something between S (inclusive) and E (exclusive).
**
** In other words, S is a buffer and E is a pointer to the first byte after
** the end of buffer S.  This macro returns true if P points to something
** contained within the buffer S.
*/
#define SQLITE_WITHIN(P,S,E) (((uptr)(P)>=(uptr)(S))&&((uptr)(P)<(uptr)(E)))


/*
** Macros to determine whether the machine is big or little endian,
** and whether or not that determination is run-time or compile-time.
**
** For best performance, an attempt is made to guess at the byte-order
** using C-preprocessor macros.  If that is unsuccessful, or if
................................................................................
  u8 colFlags;     /* Boolean properties.  See COLFLAG_ defines below */
};

/* Allowed values for Column.colFlags:
*/
#define COLFLAG_PRIMKEY  0x0001    /* Column is part of the primary key */
#define COLFLAG_HIDDEN   0x0002    /* A hidden column in a virtual table */
#define COLFLAG_HASTYPE  0x0004    /* Type name follows column name */

/*
** A "Collating Sequence" is defined by an instance of the following
** structure. Conceptually, a collating sequence consists of a name and
** a comparison routine that defines the order of that sequence.
**
** If CollSeq.xCmp is NULL, it means that the
................................................................................
#endif

/*
** Internal function prototypes
*/
int sqlite3StrICmp(const char*,const char*);
int sqlite3Strlen30(const char*);
char *sqlite3ColumnType(Column*,char*);
#define sqlite3StrNICmp sqlite3_strnicmp

int sqlite3MallocInit(void);
void sqlite3MallocEnd(void);
void *sqlite3Malloc(u64);
void *sqlite3MallocZero(u64);
void *sqlite3DbMallocZero(sqlite3*, u64);

# define SQLITE_MAX_FUNCTION_ARG 127
#endif

/*
** The suggested maximum number of in-memory pages to use for
** the main database table and for temporary tables.
**
** IMPLEMENTATION-OF: R-31093-59126 The default suggested cache size
** is 2000*1024 bytes.
** IMPLEMENTATION-OF: R-48205-43578 The default suggested cache size can be
** altered using the SQLITE_DEFAULT_CACHE_SIZE compile-time options.
*/
#ifndef SQLITE_DEFAULT_CACHE_SIZE
# define SQLITE_DEFAULT_CACHE_SIZE  -2000
#endif

# define SQLITE_MAX_FUNCTION_ARG 127
#endif

/*
** The suggested maximum number of in-memory pages to use for
** the main database table and for temporary tables.
**
** IMPLEMENTATION-OF: R-30185-15359 The default suggested cache size is -2000,
** which means the cache size is limited to 2048000 bytes of memory.
** IMPLEMENTATION-OF: R-48205-43578 The default suggested cache size can be
** altered using the SQLITE_DEFAULT_CACHE_SIZE compile-time options.
*/
#ifndef SQLITE_DEFAULT_CACHE_SIZE
# define SQLITE_DEFAULT_CACHE_SIZE  -2000
#endif

static int multiplexSleep(sqlite3_vfs *a, int b){
  return gMultiplex.pOrigVfs->xSleep(gMultiplex.pOrigVfs, b);
}
static int multiplexCurrentTime(sqlite3_vfs *a, double *b){
  return gMultiplex.pOrigVfs->xCurrentTime(gMultiplex.pOrigVfs, b);
}
static int multiplexGetLastError(sqlite3_vfs *a, int b, char *c){

  return gMultiplex.pOrigVfs->xGetLastError(gMultiplex.pOrigVfs, b, c);



}
static int multiplexCurrentTimeInt64(sqlite3_vfs *a, sqlite3_int64 *b){
  return gMultiplex.pOrigVfs->xCurrentTimeInt64(gMultiplex.pOrigVfs, b);
}

/************************ I/O Method Wrappers *******************************/

static int multiplexSleep(sqlite3_vfs *a, int b){
  return gMultiplex.pOrigVfs->xSleep(gMultiplex.pOrigVfs, b);
}
static int multiplexCurrentTime(sqlite3_vfs *a, double *b){
  return gMultiplex.pOrigVfs->xCurrentTime(gMultiplex.pOrigVfs, b);
}
static int multiplexGetLastError(sqlite3_vfs *a, int b, char *c){
  if( gMultiplex.pOrigVfs->xGetLastError ){
    return gMultiplex.pOrigVfs->xGetLastError(gMultiplex.pOrigVfs, b, c);
  }else{
    return 0;
  }
}
static int multiplexCurrentTimeInt64(sqlite3_vfs *a, sqlite3_int64 *b){
  return gMultiplex.pOrigVfs->xCurrentTimeInt64(gMultiplex.pOrigVfs, b);
}

/************************ I/O Method Wrappers *******************************/

*/
int sqlite3Strlen30(const char *z){
  if( z==0 ) return 0;
  return 0x3fffffff & (int)strlen(z);
}

/*
** The string z[] is followed immediately by another string.  Return
** a poiner to that other string.



*/
const char *sqlite3StrNext(const char *z){
  return z + strlen(z) + 1;



}

/*
** Helper function for sqlite3Error() - called rarely.  Broken out into
** a separate routine to avoid unnecessary register saves on entry to
** sqlite3Error().
*/

*/
int sqlite3Strlen30(const char *z){
  if( z==0 ) return 0;
  return 0x3fffffff & (int)strlen(z);
}

/*
** Return the declared type of a column.  Or return zDflt if the column 
** has no declared type.
**
** The column type is an extra string stored after the zero-terminator on
** the column name if and only if the COLFLAG_HASTYPE flag is set.
*/


char *sqlite3ColumnType(Column *pCol, char *zDflt){
  if( (pCol->colFlags & COLFLAG_HASTYPE)==0 ) return zDflt;
  return pCol->zName + strlen(pCol->zName) + 1;
}

/*
** Helper function for sqlite3Error() - called rarely.  Broken out into
** a separate routine to avoid unnecessary register saves on entry to
** sqlite3Error().
*/

          offset64 += sqlite3VdbeSerialTypeLen(t);
        }
        pC->aType[i++] = t;
        aOffset[i] = (u32)(offset64 & 0xffffffff);
      }while( i<=p2 && zHdr<zEndHdr );
      pC->nHdrParsed = i;
      pC->iHdrOffset = (u32)(zHdr - zData);
      if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);
  
      /* The record is corrupt if any of the following are true:
      ** (1) the bytes of the header extend past the declared header size
      ** (2) the entire header was used but not all data was used
      ** (3) the end of the data extends beyond the end of the record.
      */
      if( (zHdr>=zEndHdr && (zHdr>zEndHdr || offset64!=pC->payloadSize))
       || (offset64 > pC->payloadSize)
      ){

        rc = SQLITE_CORRUPT_BKPT;
        goto abort_due_to_error;
      }


    }else{
      t = 0;
    }

    /* If after trying to extract new entries from the header, nHdrParsed is
    ** still not up to p2, that means that the record has fewer than p2
    ** columns.  So the result will be either the default value or a NULL.

          offset64 += sqlite3VdbeSerialTypeLen(t);
        }
        pC->aType[i++] = t;
        aOffset[i] = (u32)(offset64 & 0xffffffff);
      }while( i<=p2 && zHdr<zEndHdr );
      pC->nHdrParsed = i;
      pC->iHdrOffset = (u32)(zHdr - zData);

  
      /* The record is corrupt if any of the following are true:
      ** (1) the bytes of the header extend past the declared header size
      ** (2) the entire header was used but not all data was used
      ** (3) the end of the data extends beyond the end of the record.
      */
      if( (zHdr>=zEndHdr && (zHdr>zEndHdr || offset64!=pC->payloadSize))
       || (offset64 > pC->payloadSize)
      ){
        if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);
        rc = SQLITE_CORRUPT_BKPT;
        goto abort_due_to_error;
      }
      if( pC->aRow==0 ) sqlite3VdbeMemRelease(&sMem);

    }else{
      t = 0;
    }

    /* If after trying to extract new entries from the header, nHdrParsed is
    ** still not up to p2, that means that the record has fewer than p2
    ** columns.  So the result will be either the default value or a NULL.

      ** columns of the table to see if any of them contain the token "hidden".
      ** If so, set the Column COLFLAG_HIDDEN flag and remove the token from
      ** the type string.  */
      pVTable->pNext = pTab->pVTable;
      pTab->pVTable = pVTable;

      for(iCol=0; iCol<pTab->nCol; iCol++){
        char *zType = (char*)sqlite3StrNext(pTab->aCol[iCol].zName);
        int nType;
        int i = 0;
        if( !zType[0] ){
          pTab->tabFlags |= oooHidden;
          continue;
        }
        nType = sqlite3Strlen30(zType);
        if( sqlite3StrNICmp("hidden", zType, 6)||(zType[6] && zType[6]!=' ') ){
          for(i=0; i<nType; i++){
            if( (0==sqlite3StrNICmp(" hidden", &zType[i], 7))

             && (zType[i+7]=='\0' || zType[i+7]==' ')
            ){
              i++;
              break;
            }
          }
        }
        if( i<nType ){
          int j;
          int nDel = 6 + (zType[i+6] ? 1 : 0);
          for(j=i; (j+nDel)<=nType; j++){
            zType[j] = zType[j+nDel];

      ** columns of the table to see if any of them contain the token "hidden".
      ** If so, set the Column COLFLAG_HIDDEN flag and remove the token from
      ** the type string.  */
      pVTable->pNext = pTab->pVTable;
      pTab->pVTable = pVTable;

      for(iCol=0; iCol<pTab->nCol; iCol++){
        char *zType = sqlite3ColumnType(&pTab->aCol[iCol], "");
        int nType;
        int i = 0;




        nType = sqlite3Strlen30(zType);

        for(i=0; i<nType; i++){
          if( 0==sqlite3StrNICmp("hidden", &zType[i], 6)
           && (i==0 || zType[i-1]==' ')
           && (zType[i+6]=='\0' || zType[i+6]==' ')
          ){

            break;

          }
        }
        if( i<nType ){
          int j;
          int nDel = 6 + (zType[i+6] ? 1 : 0);
          for(j=i; (j+nDel)<=nType; j++){
            zType[j] = zType[j+nDel];

} 1
do_test capi3-11.10 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3-11.11 {
  sqlite3_step $STMT
} {SQLITE_DONE}
ifcapable api_armor {
  do_test capi3-11.12armor {
    sqlite3_step $STMT
    sqlite3_step $STMT
  } {SQLITE_MISUSE}
} else {
  do_test capi3-11.12 {
    sqlite3_step $STMT

} 1
do_test capi3-11.10 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3-11.11 {
  sqlite3_step $STMT
} {SQLITE_DONE}
ifcapable !autoreset {
  do_test capi3-11.12armor {
    sqlite3_step $STMT
    sqlite3_step $STMT
  } {SQLITE_MISUSE}
} else {
  do_test capi3-11.12 {
    sqlite3_step $STMT

} 1
do_test capi3c-11.10 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.11 {
  sqlite3_step $STMT
} {SQLITE_DONE}
ifcapable api_armor {
  do_test capi3c-11.12armor {
    sqlite3_step $STMT
    sqlite3_step $STMT
  } {SQLITE_MISUSE}
} else {
  do_test capi3c-11.12 {
    sqlite3_step $STMT

} 1
do_test capi3c-11.10 {
  sqlite3_step $STMT
} {SQLITE_ROW}
do_test capi3c-11.11 {
  sqlite3_step $STMT
} {SQLITE_DONE}
ifcapable !autoreset {
  do_test capi3c-11.12armor {
    sqlite3_step $STMT
    sqlite3_step $STMT
  } {SQLITE_MISUSE}
} else {
  do_test capi3c-11.12 {
    sqlite3_step $STMT

}
#endif

/*
** Reallocate memory.  Show and error and quit if unable.
*/
static void *safe_realloc(void *pOld, int szNew){
  void *pNew = realloc(pOld, szNew);
  if( pNew==0 ) fatalError("unable to realloc for %d bytes", szNew);
  return pNew;
}

/*
** Initialize the virtual file system.
*/

}
#endif

/*
** Reallocate memory.  Show and error and quit if unable.
*/
static void *safe_realloc(void *pOld, int szNew){
  void *pNew = realloc(pOld, szNew<=0 ? 1 : szNew);
  if( pNew==0 ) fatalError("unable to realloc for %d bytes", szNew);
  return pNew;
}

/*
** Initialize the virtual file system.
*/

} 1
if !$::sqlite_options(enable_purgeable_pcache) {
  do_test memsubsys1-7.4 {
    set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
  } 0
  do_test memsubsys1-7.5 {
    set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
    expr {$maxreq<4100 + 4200*[nonzero_reserved_bytes]}
  } 1
}
do_test memsubsys1-7.6 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 1
do_test memsubsys1-7.7 {
  set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]

} 1
if !$::sqlite_options(enable_purgeable_pcache) {
  do_test memsubsys1-7.4 {
    set pg_ovfl [lindex [sqlite3_status SQLITE_STATUS_PAGECACHE_OVERFLOW 0] 2]
  } 0
  do_test memsubsys1-7.5 {
    set maxreq [lindex [sqlite3_status SQLITE_STATUS_MALLOC_SIZE 0] 2]
    expr {$maxreq<4100 + 8200*[nonzero_reserved_bytes]}
  } 1
}
do_test memsubsys1-7.6 {
  set s_used [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_USED 0] 2]
} 1
do_test memsubsys1-7.7 {
  set s_ovfl [lindex [sqlite3_status SQLITE_STATUS_SCRATCH_OVERFLOW 0] 2]

       xAccess $::tvfs_calls(xAccess)
} {xLock 0 xUnlock 0 xCheckReservedLock 0 xAccess 0}

db2 close
db close
tvfs delete


# 2016-03-11:  Make sure all works when transitioning to WAL mode under nolock.

#
do_test nolock-4.1 {
  forcedelete test.db
  sqlite3 db file:test.db?nolock=1 -uri 1
  db eval {
     PRAGMA journal_mode=WAL;
     CREATE TABLE t1(x);
     INSERT INTO t1 VALUES('youngling');
     SELECT * FROM t1;
  }
} {delete youngling}
db close

do_test nolock-4.2 {
  forcedelete test.db
  sqlite3 db test.db
  db eval {
    PRAGMA journal_mode=WAL;
    CREATE TABLE t1(x);
    INSERT INTO t1 VALUES('catbird');
    SELECT * FROM t1;
  }
} {wal catbird}
do_test nolock-4.3 {
  db close
  sqlite3 db file:test.db?nolock=1 -uri 1
  set rc [catch {db eval {SELECT * FROM t1}} msg]
  lappend rc $msg
} {1 {unable to open database file}}


finish_test

       xAccess $::tvfs_calls(xAccess)
} {xLock 0 xUnlock 0 xCheckReservedLock 0 xAccess 0}

db2 close
db close
tvfs delete

if {[permutation]!="inmemory_journal"} {
  # 2016-03-11:  Make sure all works when transitioning to WAL mode
  # under nolock.
  #
  do_test nolock-4.1 {
    forcedelete test.db
    sqlite3 db file:test.db?nolock=1 -uri 1
    db eval {
       PRAGMA journal_mode=WAL;
       CREATE TABLE t1(x);
       INSERT INTO t1 VALUES('youngling');
       SELECT * FROM t1;
    }
  } {delete youngling}
  db close
  
  do_test nolock-4.2 {
    forcedelete test.db
    sqlite3 db test.db
    db eval {
      PRAGMA journal_mode=WAL;
      CREATE TABLE t1(x);
      INSERT INTO t1 VALUES('catbird');
      SELECT * FROM t1;
    }
  } {wal catbird}
  do_test nolock-4.3 {
    db close
    sqlite3 db file:test.db?nolock=1 -uri 1
    set rc [catch {db eval {SELECT * FROM t1}} msg]
    lappend rc $msg
  } {1 {unable to open database file}}
}

finish_test

  set res [catchcmd "test.db -bad" ""]
  set rc [lindex $res 0]
  list $rc \
       [regexp {Error: unknown option: -bad} $res]
} {1 1}
# error on extra options
do_test shell1-1.1.2 {
  catchcmd "test.db \"select 3\" \"select 4\"" ""
} {0 {3
4}}
# error on extra options
do_test shell1-1.1.3 {
  catchcmd "test.db FOO test.db BAD" ".quit"
} {1 {Error: near "FOO": syntax error}}

................................................................................
  # too many arguments
  catchcmd "test.db" ".bail OFF BAD"
} {1 {Usage: .bail on|off}}

# .databases             List names and files of attached databases
do_test shell1-3.3.1 {
  catchcmd "-csv test.db" ".databases"
} "/0 +.*main +[string map {/ .} [string range [get_pwd] 0 10]].*/"
do_test shell1-3.3.2 {
  # extra arguments ignored
  catchcmd "test.db" ".databases BAD"
} "/0 +.*main +[string map {/ .} [string range [get_pwd] 0 10]].*/"

# .dump ?TABLE? ...      Dump the database in an SQL text format
#                          If TABLE specified, only dump tables matching
#                          LIKE pattern TABLE.
do_test shell1-3.4.1 {
  set res [catchcmd "test.db" ".dump"]
  list [regexp {BEGIN TRANSACTION;} $res] \

  set res [catchcmd "test.db -bad" ""]
  set rc [lindex $res 0]
  list $rc \
       [regexp {Error: unknown option: -bad} $res]
} {1 1}
# error on extra options
do_test shell1-1.1.2 {
  catchcmd "test.db \"select+3\" \"select+4\"" ""
} {0 {3
4}}
# error on extra options
do_test shell1-1.1.3 {
  catchcmd "test.db FOO test.db BAD" ".quit"
} {1 {Error: near "FOO": syntax error}}

................................................................................
  # too many arguments
  catchcmd "test.db" ".bail OFF BAD"
} {1 {Usage: .bail on|off}}

# .databases             List names and files of attached databases
do_test shell1-3.3.1 {
  catchcmd "-csv test.db" ".databases"
} "/0.+main.+[string map {/ ".{1,2}"} [string range [get_pwd] 0 10]].*/"
do_test shell1-3.3.2 {
  # extra arguments ignored
  catchcmd "test.db" ".databases BAD"
} "/0.+main.+[string map {/ ".{1,2}"} [string range [get_pwd] 0 10]].*/"

# .dump ?TABLE? ...      Dump the database in an SQL text format
#                          If TABLE specified, only dump tables matching
#                          LIKE pattern TABLE.
do_test shell1-3.4.1 {
  set res [catchcmd "test.db" ".dump"]
  list [regexp {BEGIN TRANSACTION;} $res] \

  set fexist [file exist foo.db]
  list $rc $fexist
} {{0 {}} 1}

# Shell silently ignores extra parameters.
# Ticket [f5cb008a65].
do_test shell2-1.2.1 {
  set rc [catch { eval exec $CLI \":memory:\" \"select 3\" \"select 4\" } msg]
  list $rc $msg
} {0 {3
4}}

# Test a problem reported on the mailing list. The shell was at one point
# returning the generic SQLITE_ERROR message ("SQL error or missing database")
# instead of the "too many levels..." message in the test below.

  set fexist [file exist foo.db]
  list $rc $fexist
} {{0 {}} 1}

# Shell silently ignores extra parameters.
# Ticket [f5cb008a65].
do_test shell2-1.2.1 {
  set rc [catch { eval exec $CLI \":memory:\" \"select+3\" \"select+4\" } msg]
  list $rc $msg
} {0 {3
4}}

# Test a problem reported on the mailing list. The shell was at one point
# returning the generic SQLITE_ERROR message ("SQL error or missing database")
# instead of the "too many levels..." message in the test below.

#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set CLI [test_find_cli]
db close
forcedelete test.db test.db-journal test.db-wal
sqlite3 db test.db













#----------------------------------------------------------------------------
#   shell3-1.*: Basic tests for running SQL statments from command line.
#

# Run SQL statement from command line
do_test shell3-1.1 {

#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set CLI [test_find_cli]
db close
forcedelete test.db test.db-journal test.db-wal
sqlite3 db test.db

# There are inconsistencies in command-line argument quoting on Windows.
# In particular, individual applications are responsible for command-line
# parsing in Windows, not the shell.  Depending on whether the sqlite3.exe
# program is compiled with MinGW or MSVC, the command-line parsing is
# different.  This causes problems for the tests below.  To avoid
# issues, these tests are disabled for windows.
#
if {$::tcl_platform(platform)=="windows"} {
  finish_test
  return
}

#----------------------------------------------------------------------------
#   shell3-1.*: Basic tests for running SQL statments from command line.
#

# Run SQL statement from command line
do_test shell3-1.1 {

# of this file is the sqlite3_snapshot_xxx() APIs.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !snapshot {finish_test; return}
set testprefix snapshot










#-------------------------------------------------------------------------
# Check some error conditions in snapshot_get(). It is an error if:
#
#  1) snapshot_get() is called on a non-WAL database, or
#  2) there is an open write transaction on the database.
#

# of this file is the sqlite3_snapshot_xxx() APIs.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable !snapshot {finish_test; return}
set testprefix snapshot

# This test does not work with the inmemory_journal permutation. The reason
# is that each connection opened as part of this permutation executes
# "PRAGMA journal_mode=memory", which fails if the database is in wal mode
# and there are one or more existing connections.
if {[permutation]=="inmemory_journal"} {
  finish_test
  return
}

#-------------------------------------------------------------------------
# Check some error conditions in snapshot_get(). It is an error if:
#
#  1) snapshot_get() is called on a non-WAL database, or
#  2) there is an open write transaction on the database.
#

    BEGIN;
  }
} -body {
  if { [catch { sqlite3_snapshot_open db main $::snapshot } msg] } {
    error $msg
  }
} -test {
  faultsim_test_result {0 {}} {1 SQLITE_IOERR} \
                              {1 SQLITE_IOERR_NOMEM} {1 SQLITE_IOERR_READ}
  if {$testrc==0} {
    set res [db eval { 
      SELECT a FROM t1;
      PRAGMA integrity_check;
    }]
    if {$res != "1 2 3 ok"} { error "res is $res" }

    BEGIN;
  }
} -body {
  if { [catch { sqlite3_snapshot_open db main $::snapshot } msg] } {
    error $msg
  }
} -test {
  faultsim_test_result {0 {}} {1 SQLITE_IOERR} {1 SQLITE_NOMEM} \
                              {1 SQLITE_IOERR_NOMEM} {1 SQLITE_IOERR_READ}
  if {$testrc==0} {
    set res [db eval { 
      SELECT a FROM t1;
      PRAGMA integrity_check;
    }]
    if {$res != "1 2 3 ok"} { error "res is $res" }