Fossil

        azCols[i] = (char *)sqlite3_column_name(pStmt, i);
      }
      do{
        nRow++;
        /* extract the data and data types */
        for(i=0; i<nCol; i++){
          aiTypes[i] = x = sqlite3_column_type(pStmt, i);
          if( x==SQLITE_BLOB
           && pArg
           && (pArg->cMode==MODE_Insert || pArg->cMode==MODE_Quote)
          ){
            azVals[i] = "";
          }else{
            azVals[i] = (char*)sqlite3_column_text(pStmt, i);
          }
          if( !azVals[i] && (aiTypes[i]!=SQLITE_NULL) ){
            rc = SQLITE_NOMEM;
            break; /* from for */

**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.38.0"
#define SQLITE_VERSION_NUMBER 3038000
#define SQLITE_SOURCE_ID      "2022-01-06 17:13:56 2d6a16caa7d28ad5c766036b2eb6c2020683fcc9389b3c7df2013739929dd36f"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros

#if !defined(SQLITE_OMIT_FOREIGN_KEY) && !defined(SQLITE_OMIT_TRIGGER)
SQLITE_PRIVATE   void sqlite3FkCheck(Parse*, Table*, int, int, int*, int);
SQLITE_PRIVATE   void sqlite3FkDropTable(Parse*, SrcList *, Table*);
SQLITE_PRIVATE   void sqlite3FkActions(Parse*, Table*, ExprList*, int, int*, int);
SQLITE_PRIVATE   int sqlite3FkRequired(Parse*, Table*, int*, int);
SQLITE_PRIVATE   u32 sqlite3FkOldmask(Parse*, Table*);
SQLITE_PRIVATE   FKey *sqlite3FkReferences(Table *);
SQLITE_PRIVATE   void sqlite3FkClearTriggerCache(sqlite3*,int);
#else
  #define sqlite3FkActions(a,b,c,d,e,f)
  #define sqlite3FkCheck(a,b,c,d,e,f)
  #define sqlite3FkDropTable(a,b,c)
  #define sqlite3FkOldmask(a,b)         0
  #define sqlite3FkRequired(a,b,c,d)    0
  #define sqlite3FkReferences(a)        0
  #define sqlite3FkClearTriggerCache(a,b)
#endif
#ifndef SQLITE_OMIT_FOREIGN_KEY
SQLITE_PRIVATE   void sqlite3FkDelete(sqlite3 *, Table*);
SQLITE_PRIVATE   int sqlite3FkLocateIndex(Parse*,Table*,FKey*,Index**,int**);
#else
  #define sqlite3FkDelete(a,b)
  #define sqlite3FkLocateIndex(a,b,c,d,e)

**      * A sorter
**      * A virtual table
**      * A one-row "pseudotable" stored in a single register
*/
typedef struct VdbeCursor VdbeCursor;
struct VdbeCursor {
  u8 eCurType;            /* One of the CURTYPE_* values above */
  i8 iDb;                 /* Index of cursor database in db->aDb[] */
  u8 nullRow;             /* True if pointing to a row with no data */
  u8 deferredMoveto;      /* A call to sqlite3BtreeMoveto() is needed */
  u8 isTable;             /* True for rowid tables.  False for indexes */
#ifdef SQLITE_DEBUG
  u8 seekOp;              /* Most recent seek operation on this cursor */
  u8 wrFlag;              /* The wrFlag argument to sqlite3BtreeCursor() */
#endif
  Bool isEphemeral:1;     /* True for an ephemeral table */
  Bool useRandomRowid:1;  /* Generate new record numbers semi-randomly */
  Bool isOrdered:1;       /* True if the table is not BTREE_UNORDERED */
  Bool hasBeenDuped:1;    /* This cursor was source or target of OP_OpenDup */
  u16 seekHit;            /* See the OP_SeekHit and OP_IfNoHope opcodes */
  union {                 /* pBtx for isEphermeral.  pAltMap otherwise */
    Btree *pBtx;            /* Separate file holding temporary table */

    u32 *aAltMap;           /* Mapping from table to index column numbers */
  } ub;
  i64 seqCount;           /* Sequence counter */

  /* Cached OP_Column parse information is only valid if cacheStatus matches
  ** Vdbe.cacheCtr.  Vdbe.cacheCtr will never take on the value of
  ** CACHE_STALE (0) and so setting cacheStatus=CACHE_STALE guarantees that
  ** the cache is out of date. */
  u32 cacheStatus;        /* Cache is valid if this matches Vdbe.cacheCtr */
  int seekResult;         /* Result of previous sqlite3BtreeMoveto() or 0

** Function assertTruncateConstraint(pPager) checks that one of the
** following is true for all dirty pages currently in the page-cache:
**
**   a) The page number is less than or equal to the size of the
**      current database image, in pages, OR
**
**   b) if the page content were written at this time, it would not
**      be necessary to write the current content out to the sub-journal.

**
** If the condition asserted by this function were not true, and the
** dirty page were to be discarded from the cache via the pagerStress()
** routine, pagerStress() would not write the current page content to
** the database file. If a savepoint transaction were rolled back after
** this happened, the correct behavior would be to restore the current
** content of the page. However, since this content is not present in either
** the database file or the portion of the rollback journal and
** sub-journal rolled back the content could not be restored and the
** database image would become corrupt. It is therefore fortunate that
** this circumstance cannot arise.
*/
#if defined(SQLITE_DEBUG)
static void assertTruncateConstraintCb(PgHdr *pPg){
  Pager *pPager = pPg->pPager;
  assert( pPg->flags&PGHDR_DIRTY );
  if( pPg->pgno>pPager->dbSize ){      /* if (a) is false */
    Pgno pgno = pPg->pgno;
    int i;
    for(i=0; i<pPg->pPager->nSavepoint; i++){
      PagerSavepoint *p = &pPager->aSavepoint[i];
      assert( p->nOrig<pgno || sqlite3BitvecTestNotNull(p->pInSavepoint,pgno) );
    }
  }
}
static void assertTruncateConstraint(Pager *pPager){
  sqlite3PcacheIterateDirty(pPager->pPCache, assertTruncateConstraintCb);
}
#else
# define assertTruncateConstraint(pPager)
#endif

      **
      ** If the journal does not exist, it usually means that some
      ** other connection managed to get in and roll it back before
      ** this connection obtained the exclusive lock above. Or, it
      ** may mean that the pager was in the error-state when this
      ** function was called and the journal file does not exist.
      */
      if( !isOpen(pPager->jfd) && pPager->journalMode!=PAGER_JOURNALMODE_OFF ){
        sqlite3_vfs * const pVfs = pPager->pVfs;
        int bExists;              /* True if journal file exists */
        rc = sqlite3OsAccess(
            pVfs, pPager->zJournal, SQLITE_ACCESS_EXISTS, &bExists);
        if( rc==SQLITE_OK && bExists ){
          int fout = 0;
          int f = SQLITE_OPEN_READWRITE|SQLITE_OPEN_MAIN_JOURNAL;

**
** The returned indicate the current (possibly updated) journal-mode.
*/
SQLITE_PRIVATE int sqlite3PagerSetJournalMode(Pager *pPager, int eMode){
  u8 eOld = pPager->journalMode;    /* Prior journalmode */

  /* The eMode parameter is always valid */
  assert(      eMode==PAGER_JOURNALMODE_DELETE    /* 0 */
            || eMode==PAGER_JOURNALMODE_PERSIST   /* 1 */
            || eMode==PAGER_JOURNALMODE_OFF       /* 2 */
            || eMode==PAGER_JOURNALMODE_TRUNCATE  /* 3 */
            || eMode==PAGER_JOURNALMODE_MEMORY    /* 4 */
            || eMode==PAGER_JOURNALMODE_WAL       /* 5 */ );

  /* This routine is only called from the OP_JournalMode opcode, and
  ** the logic there will never allow a temporary file to be changed
  ** to WAL mode.
  */
  assert( pPager->tempFile==0 || eMode!=PAGER_JOURNALMODE_WAL );

    assert( (PAGER_JOURNALMODE_DELETE & 5)==0 );
    assert( (PAGER_JOURNALMODE_MEMORY & 5)==4 );
    assert( (PAGER_JOURNALMODE_OFF & 5)==0 );
    assert( (PAGER_JOURNALMODE_WAL & 5)==5 );

    assert( isOpen(pPager->fd) || pPager->exclusiveMode );
    if( !pPager->exclusiveMode && (eOld & 5)==1 && (eMode & 1)==0 ){

      /* In this case we would like to delete the journal file. If it is
      ** not possible, then that is not a problem. Deleting the journal file
      ** here is an optimization only.
      **
      ** Before deleting the journal file, obtain a RESERVED lock on the
      ** database file. This ensures that the journal file is not deleted
      ** while it is in use by some other client.

  }
  pIter++;

  /* The next block of code is equivalent to:
  **
  **     pIter += getVarint(pIter, (u64*)&pInfo->nKey);
  **
  ** The code is inlined and the loop is unrolled for performance.
  ** This routine is a high-runner.
  */
  iKey = *pIter;
  if( iKey>=0x80 ){
    u8 x;
    iKey = ((iKey&0x7f)<<7) | ((x = *++pIter) & 0x7f);

    if( x>=0x80 ){
      iKey = (iKey<<7) | ((x =*++pIter) & 0x7f);
      if( x>=0x80 ){
        iKey = (iKey<<7) | ((x = *++pIter) & 0x7f);
        if( x>=0x80 ){
          iKey = (iKey<<7) | ((x = *++pIter) & 0x7f);
          if( x>=0x80 ){
            iKey = (iKey<<7) | ((x = *++pIter) & 0x7f);
            if( x>=0x80 ){
              iKey = (iKey<<7) | ((x = *++pIter) & 0x7f);
              if( x>=0x80 ){
                iKey = (iKey<<7) | ((x = *++pIter) & 0x7f);
                if( x>=0x80 ){
                  iKey = (iKey<<8) | (*++pIter);

                }
              }
            }
          }
        }
      }
    }
  }
  pIter++;

  pInfo->nKey = *(i64*)&iKey;
  pInfo->nPayload = nPayload;

    ** a moveToChild() or moveToRoot() call would have detected corruption.  */
    assert( pPage->nCell>0 );
    assert( pPage->intKey );
    lwr = 0;
    upr = pPage->nCell-1;
    assert( biasRight==0 || biasRight==1 );
    idx = upr>>(1-biasRight); /* idx = biasRight ? upr : (lwr+upr)/2; */

    for(;;){
      i64 nCellKey;
      pCell = findCellPastPtr(pPage, idx);
      if( pPage->intKeyLeaf ){
        while( 0x80 <= *(pCell++) ){
          if( pCell>=pPage->aDataEnd ){
            return SQLITE_CORRUPT_PAGE(pPage);

    ** be the right kind (index or table) of b-tree page. Otherwise
    ** a moveToChild() or moveToRoot() call would have detected corruption.  */
    assert( pPage->nCell>0 );
    assert( pPage->intKey==(pIdxKey==0) );
    lwr = 0;
    upr = pPage->nCell-1;
    idx = upr>>1; /* idx = (lwr+upr)/2; */

    for(;;){
      int nCell;  /* Size of the pCell cell in bytes */
      pCell = findCellPastPtr(pPage, idx);

      /* The maximum supported page-size is 65536 bytes. This means that
      ** the maximum number of record bytes stored on an index B-Tree
      ** page is less than 16384 bytes and may be stored as a 2-byte

  u32 pc;         /* Offset to cell content of cell being deleted */
  u8 *data;       /* pPage->aData */
  u8 *ptr;        /* Used to move bytes around within data[] */
  int rc;         /* The return code */
  int hdr;        /* Beginning of the header.  0 most pages.  100 page 1 */

  if( *pRC ) return;
  assert( idx>=0 );
  assert( idx<pPage->nCell );
  assert( CORRUPT_DB || sz==cellSize(pPage, idx) );
  assert( sqlite3PagerIswriteable(pPage->pDbPage) );
  assert( sqlite3_mutex_held(pPage->pBt->mutex) );
  assert( pPage->nFree>=0 );
  data = pPage->aData;
  ptr = &pPage->aCellIdx[2*idx];
  assert( pPage->pBt->usableSize > (int)(ptr-data) );
  pc = get2byte(ptr);
  hdr = pPage->hdrOffset;
  testcase( pc==(u32)get2byte(&data[hdr+5]) );
  testcase( pc+sz==pPage->pBt->usableSize );
  if( pc+sz > pPage->pBt->usableSize ){
    *pRC = SQLITE_CORRUPT_BKPT;
    return;

  u8 *pTmp = sqlite3PagerTempSpace(pPg->pBt->pPager);
  u8 *pData;
  int k;                          /* Current slot in pCArray->apEnd[] */
  u8 *pSrcEnd;                    /* Current pCArray->apEnd[k] value */

  assert( i<iEnd );
  j = get2byte(&aData[hdr+5]);
  if( j>(u32)usableSize ){ j = 0; }
  memcpy(&pTmp[j], &aData[j], usableSize - j);

  for(k=0; pCArray->ixNx[k]<=i && ALWAYS(k<NB*2); k++){}
  pSrcEnd = pCArray->apEnd[k];

  pData = pEnd;
  while( 1/*exit by break*/ ){

    int nTail = pageFreeArray(pPg, iNewEnd, iOldEnd - iNewEnd, pCArray);
    assert( nCell>=nTail );
    nCell -= nTail;
  }

  pData = &aData[get2byteNotZero(&aData[hdr+5])];
  if( pData<pBegin ) goto editpage_fail;
  if( pData>pPg->aDataEnd ) goto editpage_fail;

  /* Add cells to the start of the page */
  if( iNew<iOld ){
    int nAdd = MIN(nNew,iOld-iNew);
    assert( (iOld-iNew)<nNew || nCell==0 || CORRUPT_DB );
    assert( nAdd>=0 );
    pCellptr = pPg->aCellIdx;

** operation on non-FORDELETE cursors is tagged with the AUXDELETE flag.
** The BTREE_AUXDELETE bit is a hint that is not used by this implementation,
** but which might be used by alternative storage engines.
*/
SQLITE_PRIVATE int sqlite3BtreeDelete(BtCursor *pCur, u8 flags){
  Btree *p = pCur->pBtree;
  BtShared *pBt = p->pBt;
  int rc;                    /* Return code */
  MemPage *pPage;            /* Page to delete cell from */
  unsigned char *pCell;      /* Pointer to cell to delete */
  int iCellIdx;              /* Index of cell to delete */
  int iCellDepth;            /* Depth of node containing pCell */
  CellInfo info;             /* Size of the cell being deleted */

  u8 bPreserve;              /* Keep cursor valid.  2 for CURSOR_SKIPNEXT */

  assert( cursorOwnsBtShared(pCur) );
  assert( pBt->inTransaction==TRANS_WRITE );
  assert( (pBt->btsFlags & BTS_READ_ONLY)==0 );
  assert( pCur->curFlags & BTCF_WriteFlag );
  assert( hasSharedCacheTableLock(p, pCur->pgnoRoot, pCur->pKeyInfo!=0, 2) );
  assert( !hasReadConflicts(p, pCur->pgnoRoot) );
  assert( (flags & ~(BTREE_SAVEPOSITION | BTREE_AUXDELETE))==0 );
  if( pCur->eState==CURSOR_REQUIRESEEK ){
    rc = btreeRestoreCursorPosition(pCur);
    assert( rc!=SQLITE_OK || CORRUPT_DB || pCur->eState==CURSOR_VALID );
    if( rc || pCur->eState!=CURSOR_VALID ) return rc;
  }
  assert( CORRUPT_DB || pCur->eState==CURSOR_VALID );

  iCellDepth = pCur->iPage;
  iCellIdx = pCur->ix;
  pPage = pCur->pPage;
  if( pPage->nCell<=iCellIdx ){
    return SQLITE_CORRUPT_BKPT;
  }
  pCell = findCell(pPage, iCellIdx);
  if( pPage->nFree<0 && btreeComputeFreeSpace(pPage) ){
    return SQLITE_CORRUPT_BKPT;
  }

  /* If the BTREE_SAVEPOSITION bit is on, then the cursor position must
  ** be preserved following this delete operation. If the current delete
  ** will cause a b-tree rebalance, then this is done by saving the cursor
  ** key and leaving the cursor in CURSOR_REQUIRESEEK state before
  ** returning.
  **
  ** If the current delete will not cause a rebalance, then the cursor
  ** will be left in CURSOR_SKIPNEXT state pointing to the entry immediately
  ** before or after the deleted entry.
  **
  ** The bPreserve value records which path is required:
  **
  **    bPreserve==0         Not necessary to save the cursor position
  **    bPreserve==1         Use CURSOR_REQUIRESEEK to save the cursor position
  **    bPreserve==2         Cursor won't move.  Set CURSOR_SKIPNEXT.
  */
  bPreserve = (flags & BTREE_SAVEPOSITION)!=0;
  if( bPreserve ){
    if( !pPage->leaf
     || (pPage->nFree+cellSizePtr(pPage,pCell)+2)>(int)(pBt->usableSize*2/3)
     || pPage->nCell==1  /* See dbfuzz001.test for a test case */
    ){
      /* A b-tree rebalance will be required after deleting this entry.
      ** Save the cursor key.  */
      rc = saveCursorKey(pCur);
      if( rc ) return rc;
    }else{
      bPreserve = 2;
    }
  }

  /* If the page containing the entry to delete is not a leaf page, move
  ** the cursor to the largest entry in the tree that is smaller than
  ** the entry being deleted. This cell will replace the cell being deleted
  ** from the internal node. The 'previous' entry is used for this instead

      releasePage(pCur->apPage[pCur->iPage--]);
    }
    pCur->pPage = pCur->apPage[pCur->iPage];
    rc = balance(pCur);
  }

  if( rc==SQLITE_OK ){
    if( bPreserve>1 ){
      assert( (pCur->iPage==iCellDepth || CORRUPT_DB) );
      assert( pPage==pCur->pPage || CORRUPT_DB );
      assert( (pPage->nCell>0 || CORRUPT_DB) && iCellIdx<=pPage->nCell );
      pCur->eState = CURSOR_SKIPNEXT;
      if( iCellIdx>=pPage->nCell ){
        pCur->skipNext = -1;
        pCur->ix = pPage->nCell-1;
      }else{

** Close a VDBE cursor and release all the resources that cursor
** happens to hold.
*/
SQLITE_PRIVATE void sqlite3VdbeFreeCursor(Vdbe *p, VdbeCursor *pCx){
  if( pCx==0 ){
    return;
  }


  switch( pCx->eCurType ){
    case CURTYPE_SORTER: {
      sqlite3VdbeSorterClose(p->db, pCx);
      break;
    }
    case CURTYPE_BTREE: {
      assert( pCx->uc.pCursor!=0 );

*/
SQLITE_PRIVATE int sqlite3VdbeCursorMoveto(VdbeCursor **pp, u32 *piCol){
  VdbeCursor *p = *pp;
  assert( p->eCurType==CURTYPE_BTREE || p->eCurType==CURTYPE_PSEUDO );
  if( p->deferredMoveto ){
    u32 iMap;
    assert( !p->isEphemeral );
    if( p->ub.aAltMap && (iMap = p->ub.aAltMap[1+*piCol])>0 && !p->nullRow ){
      *pp = p->pAltCursor;
      *piCol = iMap - 1;
      return SQLITE_OK;
    }
    return sqlite3VdbeFinishMoveto(p);
  }
  if( sqlite3BtreeCursorHasMoved(p->uc.pCursor) ){

** Allocate VdbeCursor number iCur.  Return a pointer to it.  Return NULL
** if we run out of memory.
*/
static VdbeCursor *allocateCursor(
  Vdbe *p,              /* The virtual machine */
  int iCur,             /* Index of the new VdbeCursor */
  int nField,           /* Number of fields in the table or index */

  u8 eCurType           /* Type of the new cursor */
){
  /* Find the memory cell that will be used to store the blob of memory
  ** required for this VdbeCursor structure. It is convenient to use a
  ** vdbe memory cell to manage the memory allocation required for a
  ** VdbeCursor structure for the following reasons:
  **

    }
    pMem->szMalloc = nByte;
  }

  p->apCsr[iCur] = pCx = (VdbeCursor*)pMem->zMalloc;
  memset(pCx, 0, offsetof(VdbeCursor,pAltCursor));
  pCx->eCurType = eCurType;

  pCx->nField = nField;
  pCx->aOffset = &pCx->aType[nField];
  if( eCurType==CURTYPE_BTREE ){
    pCx->uc.pCursor = (BtCursor*)
        &pMem->z[ROUND8(sizeof(VdbeCursor))+2*sizeof(u32)*nField];
    sqlite3BtreeCursorZero(pCx->uc.pCursor);
  }

  assert( pOp->p3>0 && pOp->p3<=(p->nMem+1 - p->nCursor) );
  pDest = &aMem[pOp->p3];
  memAboutToChange(p, pDest);
  assert( pC!=0 );
  assert( p2<(u32)pC->nField );
  aOffset = pC->aOffset;
  assert( aOffset==pC->aType+pC->nField );
  assert( pC->eCurType!=CURTYPE_VTAB );
  assert( pC->eCurType!=CURTYPE_PSEUDO || pC->nullRow );
  assert( pC->eCurType!=CURTYPE_SORTER );

  if( pC->cacheStatus!=p->cacheCtr ){                /*OPTIMIZATION-IF-FALSE*/
    if( pC->nullRow ){
      if( pC->eCurType==CURTYPE_PSEUDO ){

  assert( sqlite3SchemaMutexHeld(db, pOp->p1, 0) );
  /* See note about index shifting on OP_ReadCookie */
  rc = sqlite3BtreeUpdateMeta(pDb->pBt, pOp->p2, pOp->p3);
  if( pOp->p2==BTREE_SCHEMA_VERSION ){
    /* When the schema cookie changes, record the new cookie internally */
    pDb->pSchema->schema_cookie = pOp->p3 - pOp->p5;
    db->mDbFlags |= DBFLAG_SchemaChange;
    sqlite3FkClearTriggerCache(db, pOp->p1);
  }else if( pOp->p2==BTREE_FILE_FORMAT ){
    /* Record changes in the file format */
    pDb->pSchema->file_format = pOp->p3;
  }
  if( pOp->p1==1 ){
    /* Invalidate all prepared statements whenever the TEMP database
    ** schema is changed.  Ticket #1644 */

    nField = pKeyInfo->nAllField;
  }else if( pOp->p4type==P4_INT32 ){
    nField = pOp->p4.i;
  }
  assert( pOp->p1>=0 );
  assert( nField>=0 );
  testcase( nField==0 );  /* Table with INTEGER PRIMARY KEY and nothing else */
  pCur = allocateCursor(p, pOp->p1, nField, CURTYPE_BTREE);
  if( pCur==0 ) goto no_mem;
  pCur->iDb = iDb;
  pCur->nullRow = 1;
  pCur->isOrdered = 1;
  pCur->pgnoRoot = p2;
#ifdef SQLITE_DEBUG
  pCur->wrFlag = wrFlag;
#endif
  rc = sqlite3BtreeCursor(pX, p2, wrFlag, pKeyInfo, pCur->uc.pCursor);

  VdbeCursor *pOrig;    /* The original cursor to be duplicated */
  VdbeCursor *pCx;      /* The new cursor */

  pOrig = p->apCsr[pOp->p2];
  assert( pOrig );
  assert( pOrig->isEphemeral );  /* Only ephemeral cursors can be duplicated */

  pCx = allocateCursor(p, pOp->p1, pOrig->nField, CURTYPE_BTREE);
  if( pCx==0 ) goto no_mem;
  pCx->nullRow = 1;
  pCx->isEphemeral = 1;
  pCx->pKeyInfo = pOrig->pKeyInfo;
  pCx->isTable = pOrig->isTable;
  pCx->pgnoRoot = pOrig->pgnoRoot;
  pCx->isOrdered = pOrig->isOrdered;
  pCx->ub.pBtx = pOrig->ub.pBtx;
  pCx->hasBeenDuped = 1;
  pOrig->hasBeenDuped = 1;
  rc = sqlite3BtreeCursor(pCx->ub.pBtx, pCx->pgnoRoot, BTREE_WRCSR,
                          pCx->pKeyInfo, pCx->uc.pCursor);
  /* The sqlite3BtreeCursor() routine can only fail for the first cursor
  ** opened for a database.  Since there is already an open cursor when this
  ** opcode is run, the sqlite3BtreeCursor() cannot fail */
  assert( rc==SQLITE_OK );
  break;
}

  if( pCx && !pCx->hasBeenDuped &&  ALWAYS(pOp->p2<=pCx->nField) ){
    /* If the ephermeral table is already open and has no duplicates from
    ** OP_OpenDup, then erase all existing content so that the table is
    ** empty again, rather than creating a new table. */
    assert( pCx->isEphemeral );
    pCx->seqCount = 0;
    pCx->cacheStatus = CACHE_STALE;
    rc = sqlite3BtreeClearTable(pCx->ub.pBtx, pCx->pgnoRoot, 0);
  }else{
    pCx = allocateCursor(p, pOp->p1, pOp->p2, CURTYPE_BTREE);
    if( pCx==0 ) goto no_mem;
    pCx->isEphemeral = 1;
    rc = sqlite3BtreeOpen(db->pVfs, 0, db, &pCx->ub.pBtx,
                          BTREE_OMIT_JOURNAL | BTREE_SINGLE | pOp->p5,
                          vfsFlags);
    if( rc==SQLITE_OK ){
      rc = sqlite3BtreeBeginTrans(pCx->ub.pBtx, 1, 0);
      if( rc==SQLITE_OK ){
        /* If a transient index is required, create it by calling
        ** sqlite3BtreeCreateTable() with the BTREE_BLOBKEY flag before
        ** opening it. If a transient table is required, just use the
        ** automatically created table with root-page 1 (an BLOB_INTKEY table).
        */
        if( (pCx->pKeyInfo = pKeyInfo = pOp->p4.pKeyInfo)!=0 ){
          assert( pOp->p4type==P4_KEYINFO );
          rc = sqlite3BtreeCreateTable(pCx->ub.pBtx, &pCx->pgnoRoot,
              BTREE_BLOBKEY | pOp->p5);
          if( rc==SQLITE_OK ){
            assert( pCx->pgnoRoot==SCHEMA_ROOT+1 );
            assert( pKeyInfo->db==db );
            assert( pKeyInfo->enc==ENC(db) );
            rc = sqlite3BtreeCursor(pCx->ub.pBtx, pCx->pgnoRoot, BTREE_WRCSR,
                pKeyInfo, pCx->uc.pCursor);
          }
          pCx->isTable = 0;
        }else{
          pCx->pgnoRoot = SCHEMA_ROOT;
          rc = sqlite3BtreeCursor(pCx->ub.pBtx, SCHEMA_ROOT, BTREE_WRCSR,
              0, pCx->uc.pCursor);
          pCx->isTable = 1;
        }
      }
      pCx->isOrdered = (pOp->p5!=BTREE_UNORDERED);
      if( rc ){
        sqlite3BtreeClose(pCx->ub.pBtx);
      }
    }
  }
  if( rc ) goto abort_due_to_error;
  pCx->nullRow = 1;
  break;
}

** key is sufficient to produce the required results.
*/
case OP_SorterOpen: {
  VdbeCursor *pCx;

  assert( pOp->p1>=0 );
  assert( pOp->p2>=0 );
  pCx = allocateCursor(p, pOp->p1, pOp->p2, CURTYPE_SORTER);
  if( pCx==0 ) goto no_mem;
  pCx->pKeyInfo = pOp->p4.pKeyInfo;
  assert( pCx->pKeyInfo->db==db );
  assert( pCx->pKeyInfo->enc==ENC(db) );
  rc = sqlite3VdbeSorterInit(db, pOp->p3, pCx);
  if( rc ) goto abort_due_to_error;
  break;

** the pseudo-table.
*/
case OP_OpenPseudo: {
  VdbeCursor *pCx;

  assert( pOp->p1>=0 );
  assert( pOp->p3>=0 );
  pCx = allocateCursor(p, pOp->p1, pOp->p3, CURTYPE_PSEUDO);
  if( pCx==0 ) goto no_mem;
  pCx->nullRow = 1;
  pCx->seekResult = pOp->p2;
  pCx->isTable = 1;
  /* Give this pseudo-cursor a fake BtCursor pointer so that pCx
  ** can be safely passed to sqlite3VdbeCursorMoveto().  This avoids a test
  ** for pCx->eCurType==CURTYPE_BTREE inside of sqlite3VdbeCursorMoveto()

      assert( pTabCur->eCurType==CURTYPE_BTREE );
      assert( pTabCur->uc.pCursor!=0 );
      assert( pTabCur->isTable );
      pTabCur->nullRow = 0;
      pTabCur->movetoTarget = rowid;
      pTabCur->deferredMoveto = 1;
      assert( pOp->p4type==P4_INTARRAY || pOp->p4.ai==0 );
      assert( !pTabCur->isEphemeral );
      pTabCur->ub.aAltMap = pOp->p4.ai;
      assert( !pC->isEphemeral );

      pTabCur->pAltCursor = pC;
    }else{
      pOut = out2Prerelease(p, pOp);
      pOut->u.i = rowid;
    }
  }else{
    assert( pOp->opcode==OP_IdxRowid );

  sqlite3VtabImportErrmsg(p, pVtab);
  if( rc ) goto abort_due_to_error;

  /* Initialize sqlite3_vtab_cursor base class */
  pVCur->pVtab = pVtab;

  /* Initialize vdbe cursor object */
  pCur = allocateCursor(p, pOp->p1, 0, CURTYPE_VTAB);
  if( pCur ){
    pCur->uc.pVCur = pVCur;
    pVtab->nRef++;
  }else{
    assert( db->mallocFailed );
    pModule->xClose(pVCur);
    goto no_mem;

  ** to exceed the maximum merge count */
#if SQLITE_MAX_WORKER_THREADS>=SORTER_MAX_MERGE_COUNT
  if( nWorker>=SORTER_MAX_MERGE_COUNT ){
    nWorker = SORTER_MAX_MERGE_COUNT-1;
  }
#endif

  assert( pCsr->pKeyInfo );
  assert( !pCsr->isEphemeral );
  assert( pCsr->eCurType==CURTYPE_SORTER );
  szKeyInfo = sizeof(KeyInfo) + (pCsr->pKeyInfo->nKeyField-1)*sizeof(CollSeq*);
  sz = sizeof(VdbeSorter) + nWorker * sizeof(SortSubtask);

  pSorter = (VdbeSorter*)sqlite3DbMallocZero(db, sz + szKeyInfo);
  pCsr->uc.pSorter = pSorter;
  if( pSorter==0 ){

  if( size<p->endpoint.iOffset ){
    FileChunk *pIter = 0;
    if( size==0 ){
      memjrnlFreeChunks(p->pFirst);
      p->pFirst = 0;
    }else{
      i64 iOff = p->nChunkSize;
      for(pIter=p->pFirst; ALWAYS(pIter) && iOff<size; pIter=pIter->pNext){
        iOff += p->nChunkSize;
      }
      if( ALWAYS(pIter) ){
        memjrnlFreeChunks(pIter->pNext);
        pIter->pNext = 0;
      }
    }

    sqlite3ExprDelete(dbMem, pStep->pWhere);
    sqlite3ExprListDelete(dbMem, pStep->pExprList);
    sqlite3SelectDelete(dbMem, pStep->pSelect);
    sqlite3ExprDelete(dbMem, p->pWhen);
    sqlite3DbFree(dbMem, p);
  }
}

/*
** Clear the apTrigger[] cache of CASCADE triggers for all foreign keys
** in a particular database.  This needs to happen when the schema
** changes.
*/
SQLITE_PRIVATE void sqlite3FkClearTriggerCache(sqlite3 *db, int iDb){
  HashElem *k;
  Hash *pHash = &db->aDb[iDb].pSchema->tblHash;
  for(k=sqliteHashFirst(pHash); k; k=sqliteHashNext(k)){
    Table *pTab = sqliteHashData(k);
    FKey *pFKey;
    if( !IsOrdinaryTable(pTab) ) continue;
    for(pFKey=pTab->u.tab.pFKey; pFKey; pFKey=pFKey->pNextFrom){
      fkTriggerDelete(db, pFKey->apTrigger[0]); pFKey->apTrigger[0] = 0;
      fkTriggerDelete(db, pFKey->apTrigger[1]); pFKey->apTrigger[1] = 0;
    }
  }
}

/*
** This function is called to generate code that runs when table pTab is
** being dropped from the database. The SrcList passed as the second argument
** to this function contains a single entry guaranteed to resolve to
** table pTab.
**

                   (opcode==OP_OpenWrite)?1:0, pTab->zName);
  if( HasRowid(pTab) ){
    sqlite3VdbeAddOp4Int(v, opcode, iCur, pTab->tnum, iDb, pTab->nNVCol);
    VdbeComment((v, "%s", pTab->zName));
  }else{
    Index *pPk = sqlite3PrimaryKeyIndex(pTab);
    assert( pPk!=0 );
    assert( pPk->tnum==pTab->tnum || CORRUPT_DB );
    sqlite3VdbeAddOp3(v, opcode, iCur, pPk->tnum, iDb);
    sqlite3VdbeSetP4KeyInfo(pParse, pPk);
    VdbeComment((v, "%s", pTab->zName));
  }
}

/*

    if( aRegIdx[i]==0 ) continue;
    if( pIdx->pPartIdxWhere ){
      sqlite3VdbeAddOp2(v, OP_IsNull, aRegIdx[i], sqlite3VdbeCurrentAddr(v)+2);
      VdbeCoverage(v);
    }
    pik_flags = (useSeekResult ? OPFLAG_USESEEKRESULT : 0);
    if( IsPrimaryKeyIndex(pIdx) && !HasRowid(pTab) ){

      pik_flags |= OPFLAG_NCHANGE;
      pik_flags |= (update_flags & OPFLAG_SAVEPOSITION);
      if( update_flags==0 ){
        codeWithoutRowidPreupdate(pParse, pTab, iIdxCur+i, aRegIdx[i]);
      }
    }
    sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iIdxCur+i, aRegIdx[i],

    sqlite3VdbeSetSql(sParse.pVdbe, zSql, (int)(sParse.zTail-zSql), prepFlags);
  }
  if( db->mallocFailed ){
    sParse.rc = SQLITE_NOMEM_BKPT;
    sParse.checkSchema = 0;
  }
  if( sParse.rc!=SQLITE_OK && sParse.rc!=SQLITE_DONE ){
    if( sParse.checkSchema && db->init.busy==0 ){
      schemaIsValid(&sParse);
    }
    if( sParse.pVdbe ){
      sqlite3VdbeFinalize(sParse.pVdbe);
    }
    assert( 0==(*ppStmt) );
    rc = sParse.rc;

  sFrom.a[0].iCursor = -1;
  sqlite3SelectPrep(pParse, &sSelect, 0);
  if( db->mallocFailed==0 && pParse->nErr==0 ){
    sqlite3GenerateColumnNames(pParse, &sSelect);
  }
  sqlite3ExprListDelete(db, sSelect.pEList);
  pNew = sqlite3ExpandReturning(pParse, pReturning->pReturnEL, pTab);
  if( !db->mallocFailed ){
    NameContext sNC;
    memset(&sNC, 0, sizeof(sNC));
    if( pReturning->nRetCol==0 ){
      pReturning->nRetCol = pNew->nExpr;
      pReturning->iRetCur = pParse->nTab++;
    }
    sNC.pParse = pParse;
    sNC.uNC.iBaseReg = regIn;
    sNC.ncFlags = NC_UBaseReg;
    pParse->eTriggerOp = pTrigger->op;
    pParse->pTriggerTab = pTab;
    if( sqlite3ResolveExprListNames(&sNC, pNew)==SQLITE_OK
     && !db->mallocFailed
    ){
      int i;
      int nCol = pNew->nExpr;
      int reg = pParse->nMem+1;
      pParse->nMem += nCol+2;
      pReturning->iRetReg = reg;
      for(i=0; i<nCol; i++){
        Expr *pCol = pNew->a[i].pExpr;
        assert( pCol!=0 ); /* Due to !db->mallocFailed ~9 lines above */

        sqlite3ExprCodeFactorable(pParse, pCol, reg+i);
        if( sqlite3ExprAffinity(pCol)==SQLITE_AFF_REAL ){
          sqlite3VdbeAddOp1(v, OP_RealAffinity, reg+i);
        }
      }
      sqlite3VdbeAddOp3(v, OP_MakeRecord, reg, i, reg+i);
      sqlite3VdbeAddOp2(v, OP_NewRowid, pReturning->iRetCur, reg+i+1);
      sqlite3VdbeAddOp3(v, OP_Insert, pReturning->iRetCur, reg+i, reg+i+1);
    }
  }
  sqlite3ExprListDelete(db, pNew);
  pParse->eTriggerOp = 0;
  pParse->pTriggerTab = 0;

}



/*
** Generate VDBE code for the statements inside the body of a single
** trigger.

  /* If the QUERY_SCAN flag is set, all other flags must be clear. */
  assert( (flags & FTS5INDEX_QUERY_SCAN)==0 || flags==FTS5INDEX_QUERY_SCAN );

  if( sqlite3Fts5BufferSize(&p->rc, &buf, nToken+1)==0 ){
    int iIdx = 0;                 /* Index to search */
    int iPrefixIdx = 0;           /* +1 prefix index */
    if( nToken>0 ) memcpy(&buf.p[1], pToken, nToken);

    /* Figure out which index to search and set iIdx accordingly. If this
    ** is a prefix query for which there is no prefix index, set iIdx to
    ** greater than pConfig->nPrefix to indicate that the query will be
    ** satisfied by scanning multiple terms in the main index.
    **
    ** If the QUERY_TEST_NOIDX flag was specified, then this must be a

static void fts5SourceIdFunc(
  sqlite3_context *pCtx,          /* Function call context */
  int nArg,                       /* Number of args */
  sqlite3_value **apUnused        /* Function arguments */
){
  assert( nArg==0 );
  UNUSED_PARAM2(nArg, apUnused);
  sqlite3_result_text(pCtx, "fts5: 2022-01-06 17:13:56 2d6a16caa7d28ad5c766036b2eb6c2020683fcc9389b3c7df2013739929dd36f", -1, SQLITE_TRANSIENT);
}

/*
** Return true if zName is the extension on one of the shadow tables used
** by this module.
*/
static int fts5ShadowName(const char *zName){

**
** See also: [sqlite3_libversion()],
** [sqlite3_libversion_number()], [sqlite3_sourceid()],
** [sqlite_version()] and [sqlite_source_id()].
*/
#define SQLITE_VERSION        "3.38.0"
#define SQLITE_VERSION_NUMBER 3038000
#define SQLITE_SOURCE_ID      "2022-01-06 17:13:56 2d6a16caa7d28ad5c766036b2eb6c2020683fcc9389b3c7df2013739929dd36f"

/*
** CAPI3REF: Run-Time Library Version Numbers
** KEYWORDS: sqlite3_version sqlite3_sourceid
**
** These interfaces provide the same information as the [SQLITE_VERSION],
** [SQLITE_VERSION_NUMBER], and [SQLITE_SOURCE_ID] C preprocessor macros