sqlite3_free(aPoslist);
    }
  }

  return SQLITE_OK;
}


/*
** The following three functions:
**
**     fts3EvalPhraseStart()
**     fts3EvalPhraseNext()
**
** May be used with a phrase object after fts3EvalAllocateReaders() has been
** called to iterate through the set of docids that match the phrase.
**
** After a successful call to fts3EvalPhraseNext(), the following two 
** functions may be called to access the current docid and position-list.
*/


/*
** This function is called for each Fts3Phrase in a full-text query 
** expression to initialize the mechanism for returning rows. Once this
** function has been called successfully on an Fts3Phrase, it may be
** used with fts3EvalPhraseNext() to iterate through the matching docids.
*/
static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){
................................................................................
    pExpr->bStart = 0;

    fts3EvalRestart(pCsr, pExpr->pLeft, pRc);
    fts3EvalRestart(pCsr, pExpr->pRight, pRc);
  }
}

static void fts3EvalUpdateCounts(
  Fts3Cursor *pCsr,
  Fts3Expr *pExpr,
  int *pRc
){
  if( pExpr && *pRc==SQLITE_OK ){




    Fts3Phrase *pPhrase = pExpr->pPhrase;
    if( pPhrase && pPhrase->doclist.pList ){
      int iCol = 0;
      char *p = pPhrase->doclist.pList;

      assert( *p );
      while( 1 ){
................................................................................
        pExpr->aMI[iCol*3 + 2] += (iCnt>0);
        if( *p==0x00 ) break;
        p++;
        p += sqlite3Fts3GetVarint32(p, &iCol);
      }
    }

    fts3EvalUpdateCounts(pCsr, pExpr->pLeft, pRc);
    fts3EvalUpdateCounts(pCsr, pExpr->pRight, pRc);
  }
}












static int fts3EvalGatherStats(
  Fts3Cursor *pCsr,
  Fts3Expr *pExpr
){
  int rc = SQLITE_OK;             /* Return code */

  assert( pExpr->eType==FTSQUERY_PHRASE );
  if( pExpr->aMI==0 ){
    Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab;
    Fts3Expr *pRoot;                /* Root of NEAR expression */
................................................................................
        pCsr->isMatchinfoNeeded = 1;
        pCsr->iPrevId = pRoot->iDocid;
      }while( pCsr->isEof==0 
           && pRoot->eType==FTSQUERY_NEAR 
           && fts3EvalLoadDeferred(pCsr, &rc) 
      );

      if( pCsr->isEof==0 ){
        fts3EvalUpdateCounts(pCsr, pRoot, &rc);
      }
    }

    pCsr->isEof = 0;
    pCsr->iPrevId = iPrevId;

    if( bEof ){

      sqlite3_free(aPoslist);
    }
  }

  return SQLITE_OK;
}
















/*
** This function is called for each Fts3Phrase in a full-text query 
** expression to initialize the mechanism for returning rows. Once this
** function has been called successfully on an Fts3Phrase, it may be
** used with fts3EvalPhraseNext() to iterate through the matching docids.
*/
static int fts3EvalPhraseStart(Fts3Cursor *pCsr, int bOptOk, Fts3Phrase *p){
................................................................................
    pExpr->bStart = 0;

    fts3EvalRestart(pCsr, pExpr->pLeft, pRc);
    fts3EvalRestart(pCsr, pExpr->pRight, pRc);
  }
}

/*
** After allocating the Fts3Expr.aMI[] array for each phrase in the 
** expression rooted at pExpr, the cursor iterates through all rows matched
** by pExpr, calling this function for each row. This function increments
** the values in Fts3Expr.aMI[] according to the position-list currently
** found in Fts3Expr.pPhrase->doclist.pList for each of the phrase 
** expression nodes.
*/
static void fts3EvalUpdateCounts(Fts3Expr *pExpr){
  if( pExpr ){
    Fts3Phrase *pPhrase = pExpr->pPhrase;
    if( pPhrase && pPhrase->doclist.pList ){
      int iCol = 0;
      char *p = pPhrase->doclist.pList;

      assert( *p );
      while( 1 ){
................................................................................
        pExpr->aMI[iCol*3 + 2] += (iCnt>0);
        if( *p==0x00 ) break;
        p++;
        p += sqlite3Fts3GetVarint32(p, &iCol);
      }
    }

    fts3EvalUpdateCounts(pExpr->pLeft);
    fts3EvalUpdateCounts(pExpr->pRight);
  }
}

/*
** Expression pExpr must be of type FTSQUERY_PHRASE.
**
** If it is not already allocated and populated, this function allocates and
** populates the Fts3Expr.aMI[] array for expression pExpr. If pExpr is part
** of a NEAR expression, then it also allocates and populates the same array
** for all other phrases that are part of the NEAR expression.
**
** SQLITE_OK is returned if the aMI[] array is successfully allocated and
** populated. Otherwise, if an error occurs, an SQLite error code is returned.
*/
static int fts3EvalGatherStats(
  Fts3Cursor *pCsr,               /* Cursor object */
  Fts3Expr *pExpr                 /* FTSQUERY_PHRASE expression */
){
  int rc = SQLITE_OK;             /* Return code */

  assert( pExpr->eType==FTSQUERY_PHRASE );
  if( pExpr->aMI==0 ){
    Fts3Table *pTab = (Fts3Table *)pCsr->base.pVtab;
    Fts3Expr *pRoot;                /* Root of NEAR expression */
................................................................................
        pCsr->isMatchinfoNeeded = 1;
        pCsr->iPrevId = pRoot->iDocid;
      }while( pCsr->isEof==0 
           && pRoot->eType==FTSQUERY_NEAR 
           && fts3EvalLoadDeferred(pCsr, &rc) 
      );

      if( rc==SQLITE_OK && pCsr->isEof==0 ){
        fts3EvalUpdateCounts(pRoot);
      }
    }

    pCsr->isEof = 0;
    pCsr->iPrevId = iPrevId;

    if( bEof ){