static int xferOptimization(
  Parse *pParse,        /* Parser context */
  Table *pDest,         /* The table we are inserting into */
  Select *pSelect,      /* A SELECT statement to use as the data source */
  int onError,          /* How to handle constraint errors */
  int iDbDest           /* The database of pDest */
);


















/*
** This routine is called to handle SQL of the following forms:
**
**    insert into TABLE (IDLIST) values(EXPRLIST)
**    insert into TABLE (IDLIST) select
**
................................................................................
  int i, j, idx;        /* Loop counters */
  Vdbe *v;              /* Generate code into this virtual machine */
  Index *pIdx;          /* For looping over indices of the table */
  int nColumn;          /* Number of columns in the data */
  int nHidden = 0;      /* Number of hidden columns if TABLE is virtual */
  int iDataCur = 0;     /* VDBE cursor that is the main data repository */
  int iIdxCur = 0;      /* First index cursor */

  int ipkColumn = -1;   /* Column that is the INTEGER PRIMARY KEY */
  int endOfLoop;        /* Label for the end of the insertion loop */
  int srcTab = 0;       /* Data comes from this temporary cursor if >=0 */
  int addrInsTop = 0;   /* Jump to label "D" */
  int addrCont = 0;     /* Top of insert loop. Label "C" in templates 3 and 4 */
  SelectDest dest;      /* Destination for SELECT on rhs of INSERT */
  int iDb;              /* Index of database holding TABLE */
................................................................................
    aRegIdx = sqlite3DbMallocRaw(db, sizeof(int)*(nIdx+1));
    if( aRegIdx==0 ){
      goto insert_cleanup;
    }
    for(i=0; i<nIdx; i++){
      aRegIdx[i] = ++pParse->nMem;
    }


































  }

  /* This is the top of the main insertion loop */
  if( useTempTable ){
    /* This block codes the top of loop only.  The complete loop is the
    ** following pseudocode (template 4):
    **
................................................................................
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, regIns, pVTab, P4_VTAB);
      sqlite3VdbeChangeP5(v, onError==OE_Default ? OE_Abort : onError);
      sqlite3MayAbort(pParse);
    }else
#endif
    {
      int isReplace;    /* Set to true if constraints may cause a replace */


      sqlite3GenerateConstraintChecks(pParse, pTab, aRegIdx, iDataCur, iIdxCur,
          regIns, 0, ipkColumn>=0, onError, endOfLoop, &isReplace
      );





      sqlite3FkCheck(pParse, pTab, 0, regIns, 0, 0);
      sqlite3CompleteInsertion(pParse, pTab, iDataCur, iIdxCur,
                               regIns, aRegIdx, 0, appendFlag, isReplace==0);

    }
  }

  /* Update the count of rows that are inserted
  */
  if( (db->flags & SQLITE_CountRows)!=0 ){
    sqlite3VdbeAddOp2(v, OP_AddImm, regRowCount, 1);
................................................................................
    sqlite3VdbeAddOp1(v, OP_Close, srcTab);
  }else if( pSelect ){
    sqlite3VdbeAddOp2(v, OP_Goto, 0, addrCont);
    sqlite3VdbeJumpHere(v, addrInsTop);
  }

  if( !IsVirtual(pTab) && !isView ){

























    /* Close all tables opened */
    if( iDataCur<iIdxCur ) sqlite3VdbeAddOp1(v, OP_Close, iDataCur);
    for(idx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
      sqlite3VdbeAddOp1(v, OP_Close, idx+iIdxCur);
    }
  }

................................................................................
  int iDataCur,        /* Canonical data cursor (main table or PK index) */
  int iIdxCur,         /* First index cursor */
  int regNewData,      /* First register in a range holding values to insert */
  int regOldData,      /* Previous content.  0 for INSERTs */
  u8 pkChng,           /* Non-zero if the rowid or PRIMARY KEY changed */
  u8 overrideError,    /* Override onError to this if not OE_Default */
  int ignoreDest,      /* Jump to this label on an OE_Ignore resolution */

  int *pbMayReplace    /* OUT: Set to true if constraint may cause a replace */
){
  Vdbe *v;             /* VDBE under constrution */
  Index *pIdx;         /* Pointer to one of the indices */
  Index *pPk = 0;      /* The PRIMARY KEY index */
  sqlite3 *db;         /* Database connection */
  int i;               /* loop counter */
................................................................................
    ** logic below can all be skipped. */
    if( isUpdate && pPk==pIdx && pkChng==0 ){
      sqlite3VdbeResolveLabel(v, addrUniqueOk);
      continue;
    }

    /* Find out what action to take in case there is a uniqueness conflict */
    onError = pIdx->onError;
    if( onError==OE_None ){ 
      sqlite3ReleaseTempRange(pParse, regIdx, pIdx->nColumn);
      sqlite3VdbeResolveLabel(v, addrUniqueOk);
      continue;  /* pIdx is not a UNIQUE index */
    }
    if( overrideError!=OE_Default ){
      onError = overrideError;
    }else if( onError==OE_Default ){
      onError = OE_Abort;
    }
    
    /* Check to see if the new index entry will be unique */
    sqlite3VdbeAddOp4Int(v, OP_NoConflict, iThisCur, addrUniqueOk,
                         regIdx, pIdx->nKeyCol); VdbeCoverage(v);

    /* Generate code to handle collisions */
    regR = (pIdx==pPk) ? regIdx : sqlite3GetTempRange(pParse, nPkField);
................................................................................
*/
void sqlite3CompleteInsertion(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int iDataCur,       /* Cursor of the canonical data source */
  int iIdxCur,        /* First index cursor */
  int regNewData,     /* Range of content */

  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int appendBias,     /* True if this is likely to be an append */
  int useSeekResult   /* True to set the USESEEKRESULT flag on OP_[Idx]Insert */
){
  Vdbe *v;            /* Prepared statements under construction */
  Index *pIdx;        /* An index being inserted or updated */
  u8 pik_flags;       /* flag values passed to the btree insert */
  int regData;        /* Content registers (after the rowid) */
  int regRec;         /* Register holding assembled record for the table */
  int i;              /* Loop counter */
  u8 bAffinityDone = 0; /* True if OP_Affinity has been run already */



  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    if( aRegIdx[i]==0 ) continue;
    bAffinityDone = 1;
    if( pIdx->pPartIdxWhere ){
      sqlite3VdbeAddOp2(v, OP_IsNull, aRegIdx[i], sqlite3VdbeCurrentAddr(v)+2);
      VdbeCoverage(v);
    }
    sqlite3VdbeAddOp2(v, OP_IdxInsert, iIdxCur+i, aRegIdx[i]);
    pik_flags = 0;
    if( useSeekResult ) pik_flags = OPFLAG_USESEEKRESULT;
    if( IsPrimaryKeyIndex(pIdx) && !HasRowid(pTab) ){
      assert( pParse->nested==0 );
      pik_flags |= OPFLAG_NCHANGE;
    }
    if( pik_flags )  sqlite3VdbeChangeP5(v, pik_flags);

static int xferOptimization(
  Parse *pParse,        /* Parser context */
  Table *pDest,         /* The table we are inserting into */
  Select *pSelect,      /* A SELECT statement to use as the data source */
  int onError,          /* How to handle constraint errors */
  int iDbDest           /* The database of pDest */
);

/*
** Return the conflict handling mode that should be used for index pIdx
** if the statement specified conflict mode overrideError.
**
** If the index is not a UNIQUE index, then the conflict handling mode is
** always OE_None. Otherwise, it is one of OE_Abort, OE_Rollback, OE_Fail, 
** OE_Ignore or OE_Replace.
*/
static u8 idxConflictMode(Index *pIdx, u8 overrideError){
  u8 ret = pIdx->onError;
  if( ret!=OE_None ){
    if( overrideError!=OE_Default ) ret = overrideError;
    if( ret==OE_Default ) ret = OE_Abort;
  }
  return ret;
}

/*
** This routine is called to handle SQL of the following forms:
**
**    insert into TABLE (IDLIST) values(EXPRLIST)
**    insert into TABLE (IDLIST) select
**
................................................................................
  int i, j, idx;        /* Loop counters */
  Vdbe *v;              /* Generate code into this virtual machine */
  Index *pIdx;          /* For looping over indices of the table */
  int nColumn;          /* Number of columns in the data */
  int nHidden = 0;      /* Number of hidden columns if TABLE is virtual */
  int iDataCur = 0;     /* VDBE cursor that is the main data repository */
  int iIdxCur = 0;      /* First index cursor */
  int iSortCur = 0;     /* First sorter cursor (for INSERT INTO ... SELECT) */
  int ipkColumn = -1;   /* Column that is the INTEGER PRIMARY KEY */
  int endOfLoop;        /* Label for the end of the insertion loop */
  int srcTab = 0;       /* Data comes from this temporary cursor if >=0 */
  int addrInsTop = 0;   /* Jump to label "D" */
  int addrCont = 0;     /* Top of insert loop. Label "C" in templates 3 and 4 */
  SelectDest dest;      /* Destination for SELECT on rhs of INSERT */
  int iDb;              /* Index of database holding TABLE */
................................................................................
    aRegIdx = sqlite3DbMallocRaw(db, sizeof(int)*(nIdx+1));
    if( aRegIdx==0 ){
      goto insert_cleanup;
    }
    for(i=0; i<nIdx; i++){
      aRegIdx[i] = ++pParse->nMem;
    }

    /* If this is an INSERT INTO ... SELECT statement on a non-virtual table,
    ** check if it is possible to defer updating any indexes until after
    ** all rows have been processed. If it is, the index keys can be sorted
    ** before they are inserted into the index b-tree, which is more efficient
    ** for large inserts. It is possible to defer updating the indexes if:
    **
    **    * there are no triggers to fire, and
    **    * no foreign key processing to perform, and
    **    * the on-conflict mode used for all UNIQUE indexes is either 
    **      ROLLBACK or ABORT.
    */
    if( pSelect 
     && !IsVirtual(pTab) 
     && pTrigger==0 
     && 0==sqlite3FkRequired(pParse, pTab, 0, 0) 
    ){
      for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
        u8 oe = idxConflictMode(pIdx, onError);
        if( oe==OE_Fail || oe==OE_Replace || oe==OE_Ignore ) break;
        assert( oe==OE_None||oe==OE_Abort||oe==OE_Rollback );
      }
      if( pIdx==0 ){
        /* This statement can sort the set of new keys for each index before
        ** writing them into the b-tree on disk. So open a sorter for each
        ** index on the table. */
        iSortCur = pParse->nTab;
        for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
          sqlite3VdbeAddOp1(v, OP_SorterOpen, pParse->nTab++);
          sqlite3VdbeSetP4KeyInfo(pParse, pIdx);
        }
        assert( iSortCur>0 );
      }
    }
  }

  /* This is the top of the main insertion loop */
  if( useTempTable ){
    /* This block codes the top of loop only.  The complete loop is the
    ** following pseudocode (template 4):
    **
................................................................................
      sqlite3VdbeAddOp4(v, OP_VUpdate, 1, pTab->nCol+2, regIns, pVTab, P4_VTAB);
      sqlite3VdbeChangeP5(v, onError==OE_Default ? OE_Abort : onError);
      sqlite3MayAbort(pParse);
    }else
#endif
    {
      int isReplace;    /* Set to true if constraints may cause a replace */
      int iIdxBase = iIdxCur;
      int op = OP_IdxInsert;
      sqlite3GenerateConstraintChecks(pParse, pTab, aRegIdx, iDataCur, iIdxCur,
          regIns, 0, ipkColumn>=0, onError, endOfLoop, iSortCur!=0, &isReplace
      );
      if( iSortCur ){
        iIdxBase = iSortCur;
        isReplace = 1;
        op = OP_SorterInsert;
      }
      sqlite3FkCheck(pParse, pTab, 0, regIns, 0, 0);
      sqlite3CompleteInsertion(pParse, pTab, 
          iDataCur, iIdxBase, regIns, op, aRegIdx, 0, appendFlag, isReplace==0
      );
    }
  }

  /* Update the count of rows that are inserted
  */
  if( (db->flags & SQLITE_CountRows)!=0 ){
    sqlite3VdbeAddOp2(v, OP_AddImm, regRowCount, 1);
................................................................................
    sqlite3VdbeAddOp1(v, OP_Close, srcTab);
  }else if( pSelect ){
    sqlite3VdbeAddOp2(v, OP_Goto, 0, addrCont);
    sqlite3VdbeJumpHere(v, addrInsTop);
  }

  if( !IsVirtual(pTab) && !isView ){
    /* If new index keys were written into sorter objects instead of
    ** directly to the index b-trees, copy them from the sorters into the
    ** indexes now. And close all the sorters. */
    if( iSortCur ){
      int iTmp = sqlite3GetTempReg(pParse);
      for(idx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
        int oe = idxConflictMode(pIdx, onError);
        int iCur = iSortCur + idx;
        int iIdx = iIdxCur + idx;
        int addr = sqlite3VdbeAddOp1(v, OP_SorterSort, iCur);
        sqlite3VdbeAddOp3(v, OP_SorterData, iCur, iTmp, iIdx);
        if( oe!=OE_None ){
          int nField = -1 * pIdx->nKeyCol;
          int jmp = sqlite3VdbeCurrentAddr(v)+2;
          sqlite3VdbeAddOp4Int(v, OP_NoConflict, iIdx, jmp, iTmp, nField);
          sqlite3UniqueConstraint(pParse, oe, pIdx);
        }
        sqlite3VdbeAddOp2(v, OP_IdxInsert, iIdx, iTmp); 
        sqlite3VdbeAddOp2(v, OP_SorterNext, iCur, addr+1); VdbeCoverage(v);
        sqlite3VdbeJumpHere(v, addr);
        sqlite3VdbeAddOp1(v, OP_Close, iCur);
      }
      sqlite3ReleaseTempReg(pParse, iTmp);
    }

    /* Close all tables opened */
    if( iDataCur<iIdxCur ) sqlite3VdbeAddOp1(v, OP_Close, iDataCur);
    for(idx=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, idx++){
      sqlite3VdbeAddOp1(v, OP_Close, idx+iIdxCur);
    }
  }

................................................................................
  int iDataCur,        /* Canonical data cursor (main table or PK index) */
  int iIdxCur,         /* First index cursor */
  int regNewData,      /* First register in a range holding values to insert */
  int regOldData,      /* Previous content.  0 for INSERTs */
  u8 pkChng,           /* Non-zero if the rowid or PRIMARY KEY changed */
  u8 overrideError,    /* Override onError to this if not OE_Default */
  int ignoreDest,      /* Jump to this label on an OE_Ignore resolution */
  int ignoreUnique,    /* Do not enforce UNIQUE constraints */
  int *pbMayReplace    /* OUT: Set to true if constraint may cause a replace */
){
  Vdbe *v;             /* VDBE under constrution */
  Index *pIdx;         /* Pointer to one of the indices */
  Index *pPk = 0;      /* The PRIMARY KEY index */
  sqlite3 *db;         /* Database connection */
  int i;               /* loop counter */
................................................................................
    ** logic below can all be skipped. */
    if( isUpdate && pPk==pIdx && pkChng==0 ){
      sqlite3VdbeResolveLabel(v, addrUniqueOk);
      continue;
    }

    /* Find out what action to take in case there is a uniqueness conflict */
    onError = idxConflictMode(pIdx, overrideError);
    if( onError==OE_None || ignoreUnique ){ 
      sqlite3ReleaseTempRange(pParse, regIdx, pIdx->nColumn);
      sqlite3VdbeResolveLabel(v, addrUniqueOk);
      continue;  /* pIdx is not a UNIQUE index */
    }





    
    /* Check to see if the new index entry will be unique */
    sqlite3VdbeAddOp4Int(v, OP_NoConflict, iThisCur, addrUniqueOk,
                         regIdx, pIdx->nKeyCol); VdbeCoverage(v);

    /* Generate code to handle collisions */
    regR = (pIdx==pPk) ? regIdx : sqlite3GetTempRange(pParse, nPkField);
................................................................................
*/
void sqlite3CompleteInsertion(
  Parse *pParse,      /* The parser context */
  Table *pTab,        /* the table into which we are inserting */
  int iDataCur,       /* Cursor of the canonical data source */
  int iIdxCur,        /* First index cursor */
  int regNewData,     /* Range of content */
  int idxop,          /* Opcode to use to write to "indexes" */
  int *aRegIdx,       /* Register used by each index.  0 for unused indices */
  int isUpdate,       /* True for UPDATE, False for INSERT */
  int appendBias,     /* True if this is likely to be an append */
  int useSeekResult   /* True to set the USESEEKRESULT flag on OP_[Idx]Insert */
){
  Vdbe *v;            /* Prepared statements under construction */
  Index *pIdx;        /* An index being inserted or updated */
  u8 pik_flags;       /* flag values passed to the btree insert */
  int regData;        /* Content registers (after the rowid) */
  int regRec;         /* Register holding assembled record for the table */
  int i;              /* Loop counter */
  u8 bAffinityDone = 0; /* True if OP_Affinity has been run already */

  assert( idxop==OP_IdxInsert || idxop==OP_SorterInsert );

  v = sqlite3GetVdbe(pParse);
  assert( v!=0 );
  assert( pTab->pSelect==0 );  /* This table is not a VIEW */
  for(i=0, pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext, i++){
    if( aRegIdx[i]==0 ) continue;
    bAffinityDone = 1;
    if( pIdx->pPartIdxWhere ){
      sqlite3VdbeAddOp2(v, OP_IsNull, aRegIdx[i], sqlite3VdbeCurrentAddr(v)+2);
      VdbeCoverage(v);
    }
    sqlite3VdbeAddOp2(v, idxop, iIdxCur+i, aRegIdx[i]);
    pik_flags = 0;
    if( useSeekResult ) pik_flags = OPFLAG_USESEEKRESULT;
    if( IsPrimaryKeyIndex(pIdx) && !HasRowid(pTab) ){
      assert( pParse->nested==0 );
      pik_flags |= OPFLAG_NCHANGE;
    }
    if( pik_flags )  sqlite3VdbeChangeP5(v, pik_flags);

int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8);
void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int*);
void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int*,int,int,int);
int sqlite3OpenTableAndIndices(Parse*, Table*, int, int, u8*, int*, int*);
void sqlite3BeginWriteOperation(Parse*, int, int);
void sqlite3MultiWrite(Parse*);
void sqlite3MayAbort(Parse*);
void sqlite3HaltConstraint(Parse*, int, int, char*, i8, u8);
void sqlite3UniqueConstraint(Parse*, int, Index*);
void sqlite3RowidConstraint(Parse*, int, Table*);

int sqlite3ExprNeedsNoAffinityChange(const Expr*, char);
int sqlite3IsRowid(const char*);
void sqlite3GenerateRowDelete(Parse*,Table*,Trigger*,int,int,int,i16,u8,u8,u8);
void sqlite3GenerateRowIndexDelete(Parse*, Table*, int, int, int*);
int sqlite3GenerateIndexKey(Parse*, Index*, int, int, int, int*,Index*,int);
void sqlite3ResolvePartIdxLabel(Parse*,int);
void sqlite3GenerateConstraintChecks(Parse*,Table*,int*,int,int,int,int,
                                     u8,u8,int,int,int*);
void sqlite3CompleteInsertion(Parse*,Table*,int,int,int,int,int*,int,int,int);
int sqlite3OpenTableAndIndices(Parse*, Table*, int, int, u8*, int*, int*);
void sqlite3BeginWriteOperation(Parse*, int, int);
void sqlite3MultiWrite(Parse*);
void sqlite3MayAbort(Parse*);
void sqlite3HaltConstraint(Parse*, int, int, char*, i8, u8);
void sqlite3UniqueConstraint(Parse*, int, Index*);
void sqlite3RowidConstraint(Parse*, int, Table*);

  if( !isView ){
    int j1 = 0;           /* Address of jump instruction */
    int bReplace = 0;     /* True if REPLACE conflict resolution might happen */

    /* Do constraint checks. */
    assert( regOldRowid>0 );
    sqlite3GenerateConstraintChecks(pParse, pTab, aRegIdx, iDataCur, iIdxCur,
        regNewRowid, regOldRowid, chngKey, onError, labelContinue, &bReplace);

    /* Do FK constraint checks. */
    if( hasFK ){
      sqlite3FkCheck(pParse, pTab, regOldRowid, 0, aXRef, chngKey);
    }

    /* Delete the index entries associated with the current record.  */
................................................................................

    if( hasFK ){
      sqlite3FkCheck(pParse, pTab, 0, regNewRowid, aXRef, chngKey);
    }
  
    /* Insert the new index entries and the new record. */
    sqlite3CompleteInsertion(pParse, pTab, iDataCur, iIdxCur,
                             regNewRowid, aRegIdx, 1, 0, 0);

    /* Do any ON CASCADE, SET NULL or SET DEFAULT operations required to
    ** handle rows (possibly in other tables) that refer via a foreign key
    ** to the row just updated. */ 
    if( hasFK ){
      sqlite3FkActions(pParse, pTab, pChanges, regOldRowid, aXRef, chngKey);
    }

  if( !isView ){
    int j1 = 0;           /* Address of jump instruction */
    int bReplace = 0;     /* True if REPLACE conflict resolution might happen */

    /* Do constraint checks. */
    assert( regOldRowid>0 );
    sqlite3GenerateConstraintChecks(pParse, pTab, aRegIdx, iDataCur, iIdxCur,
        regNewRowid, regOldRowid, chngKey, onError, labelContinue, 0,&bReplace);

    /* Do FK constraint checks. */
    if( hasFK ){
      sqlite3FkCheck(pParse, pTab, regOldRowid, 0, aXRef, chngKey);
    }

    /* Delete the index entries associated with the current record.  */
................................................................................

    if( hasFK ){
      sqlite3FkCheck(pParse, pTab, 0, regNewRowid, aXRef, chngKey);
    }
  
    /* Insert the new index entries and the new record. */
    sqlite3CompleteInsertion(pParse, pTab, iDataCur, iIdxCur,
                             regNewRowid, OP_IdxInsert, aRegIdx, 1, 0, 0);

    /* Do any ON CASCADE, SET NULL or SET DEFAULT operations required to
    ** handle rows (possibly in other tables) that refer via a foreign key
    ** to the row just updated. */ 
    if( hasFK ){
      sqlite3FkActions(pParse, pTab, pChanges, regOldRowid, aXRef, chngKey);
    }

** string that the register itself controls.  In other words, it
** converts an MEM_Ephem string into a string with P.z==P.zMalloc.
*/
#define Deephemeralize(P) \
   if( ((P)->flags&MEM_Ephem)!=0 \
       && sqlite3VdbeMemMakeWriteable(P) ){ goto no_mem;}

/* Return true if the cursor was opened using the OP_OpenSorter opcode. */
#define isSorter(x) ((x)->pSorter!=0)

/*
** Allocate VdbeCursor number iCur.  Return a pointer to it.  Return NULL
** if we run out of memory.
*/
static VdbeCursor *allocateCursor(
................................................................................
** See also: Found, NotExists, NoConflict
*/
/* Opcode: NoConflict P1 P2 P3 P4 *
** Synopsis: key=r[P3@P4]
**
** If P4==0 then register P3 holds a blob constructed by MakeRecord.  If
** P4>0 then register P3 is the first of P4 registers that form an unpacked
** record.

** 
** Cursor P1 is on an index btree.  If the record identified by P3 and P4
** contains any NULL value, jump immediately to P2.  If all terms of the
** record are not-NULL then a check is done to determine if any row in the
** P1 index btree has a matching key prefix.  If there are no matches, jump
** immediately to P2.  If there is a match, fall through and leave the P1
** cursor pointing to the matching row.
................................................................................
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(
        pC->pKeyInfo, aTempRec, sizeof(aTempRec), &pFree
    );
    if( pIdxKey==0 ) goto no_mem;
    assert( pIn3->flags & MEM_Blob );
    ExpandBlob(pIn3);
    sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z, pIdxKey);



  }
  pIdxKey->default_rc = 0;
  if( pOp->opcode==OP_NoConflict ){
    /* For the OP_NoConflict opcode, take the jump if any of the
    ** input fields are NULL, since any key with a NULL will not
    ** conflict */
    for(ii=0; ii<pIdxKey->nField; ii++){
................................................................................
      if( pIdxKey->aMem[ii].flags & MEM_Null ){
        pc = pOp->p2 - 1; VdbeBranchTaken(1,2);
        break;
      }
    }
  }
  rc = sqlite3BtreeMovetoUnpacked(pC->pCursor, pIdxKey, 0, 0, &res);
  if( pOp->p4.i==0 ){
    sqlite3DbFree(db, pFree);
  }
  if( rc!=SQLITE_OK ){
    break;
  }
  pC->seekResult = res;
  alreadyExists = (res==0);

** string that the register itself controls.  In other words, it
** converts an MEM_Ephem string into a string with P.z==P.zMalloc.
*/
#define Deephemeralize(P) \
   if( ((P)->flags&MEM_Ephem)!=0 \
       && sqlite3VdbeMemMakeWriteable(P) ){ goto no_mem;}

/* Return true if the cursor was opened using the OP_SorterOpen opcode. */
#define isSorter(x) ((x)->pSorter!=0)

/*
** Allocate VdbeCursor number iCur.  Return a pointer to it.  Return NULL
** if we run out of memory.
*/
static VdbeCursor *allocateCursor(
................................................................................
** See also: Found, NotExists, NoConflict
*/
/* Opcode: NoConflict P1 P2 P3 P4 *
** Synopsis: key=r[P3@P4]
**
** If P4==0 then register P3 holds a blob constructed by MakeRecord.  If
** P4>0 then register P3 is the first of P4 registers that form an unpacked
** record. If P4<0, then P3 holds a blob constructed by MakeRecord, but
** only the first |P4| fields should be considered.
** 
** Cursor P1 is on an index btree.  If the record identified by P3 and P4
** contains any NULL value, jump immediately to P2.  If all terms of the
** record are not-NULL then a check is done to determine if any row in the
** P1 index btree has a matching key prefix.  If there are no matches, jump
** immediately to P2.  If there is a match, fall through and leave the P1
** cursor pointing to the matching row.
................................................................................
    pIdxKey = sqlite3VdbeAllocUnpackedRecord(
        pC->pKeyInfo, aTempRec, sizeof(aTempRec), &pFree
    );
    if( pIdxKey==0 ) goto no_mem;
    assert( pIn3->flags & MEM_Blob );
    ExpandBlob(pIn3);
    sqlite3VdbeRecordUnpack(pC->pKeyInfo, pIn3->n, pIn3->z, pIdxKey);
    if( pOp->p4.i<0 ){
      pIdxKey->nField = pOp->p4.i * -1;
    }
  }
  pIdxKey->default_rc = 0;
  if( pOp->opcode==OP_NoConflict ){
    /* For the OP_NoConflict opcode, take the jump if any of the
    ** input fields are NULL, since any key with a NULL will not
    ** conflict */
    for(ii=0; ii<pIdxKey->nField; ii++){
................................................................................
      if( pIdxKey->aMem[ii].flags & MEM_Null ){
        pc = pOp->p2 - 1; VdbeBranchTaken(1,2);
        break;
      }
    }
  }
  rc = sqlite3BtreeMovetoUnpacked(pC->pCursor, pIdxKey, 0, 0, &res);
  if( pOp->p4.i<=0 ){
    sqlite3DbFree(db, pFree);
  }
  if( rc!=SQLITE_OK ){
    break;
  }
  pC->seekResult = res;
  alreadyExists = (res==0);

  db transaction {
    execsql { PRAGMA page_size = 1024; }
    execsql $sql
    execsql {
      CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
      INSERT INTO t1 VALUES(1, randomblob(400));
      INSERT INTO t1 SELECT a+1,  randomblob(400) FROM t1;
      INSERT INTO t1 SELECT a+2,  randomblob(400) FROM t1;
      INSERT INTO t1 SELECT a+4,  randomblob(400) FROM t1;
      INSERT INTO t1 SELECT a+8,  randomblob(400) FROM t1;
      INSERT INTO t1 SELECT a+16, randomblob(400) FROM t1;
      INSERT INTO t1 SELECT a+32, randomblob(400) FROM t1;
      INSERT INTO t1 SELECT a+64, randomblob(400) FROM t1;

      CREATE TABLE t2(a PRIMARY KEY, b UNIQUE);
      INSERT INTO t2 SELECT * FROM t1;
    }
  }

  return [expr {[file size test.db] / 1024}]
}

# This proc returns the number of contiguous blocks of pages that make up
................................................................................
#                    less fragmented.
#
ifcapable vtab&&compound {
  create_db 
  register_dbstat_vtab db
  do_execsql_test e_vacuum-1.2.1 {
    DELETE FROM t1 WHERE a%2;
    INSERT INTO t1 SELECT b, a FROM t2 WHERE a%2;
    UPDATE t1 SET b=randomblob(600) WHERE (a%2)==0;
  } {}
  
  do_test e_vacuum-1.2.2.1 { expr [fragment_count t1]>100 } 1
  do_test e_vacuum-1.2.2.2 { expr [fragment_count sqlite_autoindex_t1_1]>100 } 1
  do_test e_vacuum-1.2.2.3 { expr [fragment_count sqlite_autoindex_t1_2]>100 } 1
  

  db transaction {
    execsql { PRAGMA page_size = 1024; }
    execsql $sql
    execsql {
      CREATE TABLE t1(a PRIMARY KEY, b UNIQUE);
      INSERT INTO t1 VALUES(1, randomblob(400));
      INSERT OR FAIL INTO t1 SELECT a+1,  randomblob(400) FROM t1;
      INSERT OR FAIL INTO t1 SELECT a+2,  randomblob(400) FROM t1;
      INSERT OR FAIL INTO t1 SELECT a+4,  randomblob(400) FROM t1;
      INSERT OR FAIL INTO t1 SELECT a+8,  randomblob(400) FROM t1;
      INSERT OR FAIL INTO t1 SELECT a+16, randomblob(400) FROM t1;
      INSERT OR FAIL INTO t1 SELECT a+32, randomblob(400) FROM t1;
      INSERT OR FAIL INTO t1 SELECT a+64, randomblob(400) FROM t1;

      CREATE TABLE t2(a PRIMARY KEY, b UNIQUE);
      INSERT OR FAIL INTO t2 SELECT * FROM t1;
    }
  }

  return [expr {[file size test.db] / 1024}]
}

# This proc returns the number of contiguous blocks of pages that make up
................................................................................
#                    less fragmented.
#
ifcapable vtab&&compound {
  create_db 
  register_dbstat_vtab db
  do_execsql_test e_vacuum-1.2.1 {
    DELETE FROM t1 WHERE a%2;
    INSERT OR REPLACE INTO t1 SELECT b, a FROM t2 WHERE a%2;
    UPDATE t1 SET b=randomblob(600) WHERE (a%2)==0;
  } {}
  
  do_test e_vacuum-1.2.2.1 { expr [fragment_count t1]>100 } 1
  do_test e_vacuum-1.2.2.2 { expr [fragment_count sqlite_autoindex_t1_1]>100 } 1
  do_test e_vacuum-1.2.2.3 { expr [fragment_count sqlite_autoindex_t1_2]>100 } 1
  

# 2015 March 20
#
# 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.
#
#***********************************************************************
#
# The tests in this file ensure that sorter objects are used by 
# "INSERT INTO ... SELECT ..." statements when possible.
#

set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix insert6

# Return the number of OP_SorterOpen instructions in the SQL passed as
# the only argument if it is compiled using connection [db].
#
proc sorter_count {sql} {
  set res 0
  db cache flush
  db eval "EXPLAIN $sql" x {
    if {$x(opcode) == "SorterOpen"} { incr res }
  }
  return $res
}


#-------------------------------------------------------------------------
# Warm body test. This verifies that the simplest case works for both
# regular and WITHOUT ROWID tables.
#
do_execsql_test 1.1 {
  CREATE TABLE t2(x UNIQUE ON CONFLICT IGNORE, y, z);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<99 )
  INSERT INTO t2 SELECT abs(random()), abs(random()), abs(random()) FROM cnt;
}

foreach {tn nSort schema} {
  1 3 { CREATE TABLE t1(a, b, c) }
  2 4 { CREATE TABLE t1(a PRIMARY KEY, b, c) WITHOUT ROWID }
} {

  do_test 1.$tn.1 {
    execsql { DROP TABLE IF EXISTS t1 }
    execsql $schema 
  } {}

  do_execsql_test 1.$tn.2 {
    CREATE INDEX t1a ON t1(a);
    CREATE INDEX t1b ON t1(b);
    CREATE INDEX t1c ON t1(c);
  }

  do_execsql_test 1.$tn.3 {
    INSERT INTO t1 SELECT x, y, z FROM t2;
    PRAGMA integrity_check;
    SELECT count(*) FROM t1;
  } {ok 100}
  
  do_execsql_test 1.$tn.4 {
    INSERT INTO t1 SELECT -x, y, z FROM t2;
    PRAGMA integrity_check;
  } {ok}

  do_execsql_test 1.$tn.5 {
    SELECT count(*) FROM t1;
  } {200}

  do_test 1.$tn.6 {
    sorter_count { INSERT INTO t1 SELECT * FROM t2 }
  } $nSort
}

#-------------------------------------------------------------------------
# The following test cases check that the sorters are disabled if any
# of the following are true:
#
#   2.1: There are one or more UNIQUE constraints or indexes and the 
#        statement specifies "ON CONFLICT FAIL", "IGNORE" or "REPLACE".
#
#   2.2: The statement does not explicitly specify a conflict mode and 
#        there are one or more PRIMARY KEY or UNIQUE constraints with 
#        "OR FAIL", "OR IGNORE" or "OR REPLACE" as the conflict handling 
#        mode.
#
#   2.3: There are one or more INSERT triggers on the target table.
#
#   2.4: The target table is the parent or child of an FK constraint.
#

do_execsql_test 2.1.1 {
  CREATE TABLE x1(a, b, c);
  CREATE INDEX x1a ON x1(a);

  CREATE TABLE x2(a, b, c);
  CREATE UNIQUE INDEX x2a ON x2(a);

  CREATE TABLE x3(a PRIMARY KEY, b, c);
  CREATE TABLE x4(a PRIMARY KEY, b, c) WITHOUT ROWID;
}

do_test 2.1.2 { sorter_count { INSERT OR REPLACE INTO x1 SELECT * FROM t2 } } 1
do_test 2.1.3 { sorter_count { INSERT OR REPLACE INTO x2 SELECT * FROM t2 } } 0
do_test 2.1.4 { sorter_count { INSERT OR REPLACE INTO x3 SELECT * FROM t2 } } 0
do_test 2.1.5 { sorter_count { INSERT OR REPLACE INTO x4 SELECT * FROM t2 } } 0

do_test 2.1.6 { sorter_count { INSERT OR IGNORE INTO x1 SELECT * FROM t2 } } 1
do_test 2.1.7 { sorter_count { INSERT OR IGNORE INTO x2 SELECT * FROM t2 } } 0
do_test 2.1.8 { sorter_count { INSERT OR IGNORE INTO x3 SELECT * FROM t2 } } 0
do_test 2.1.9 { sorter_count { INSERT OR IGNORE INTO x4 SELECT * FROM t2 } } 0

do_test 2.1.10 { sorter_count { INSERT OR FAIL INTO x1 SELECT * FROM t2 } } 1
do_test 2.1.11 { sorter_count { INSERT OR FAIL INTO x2 SELECT * FROM t2 } } 0
do_test 2.1.12 { sorter_count { INSERT OR FAIL INTO x3 SELECT * FROM t2 } } 0
do_test 2.1.13 { sorter_count { INSERT OR FAIL INTO x4 SELECT * FROM t2 } } 0

do_test 2.1.14 { sorter_count { INSERT OR ROLLBACK INTO x1 SELECT * FROM t2} } 1
do_test 2.1.15 { sorter_count { INSERT OR ROLLBACK INTO x2 SELECT * FROM t2} } 1
do_test 2.1.16 { sorter_count { INSERT OR ROLLBACK INTO x3 SELECT * FROM t2} } 1
do_test 2.1.17 { sorter_count { INSERT OR ROLLBACK INTO x4 SELECT * FROM t2} } 1

do_test 2.1.18 { sorter_count { INSERT OR ABORT INTO x1 SELECT * FROM t2 } } 1
do_test 2.1.19 { sorter_count { INSERT OR ABORT INTO x2 SELECT * FROM t2 } } 1
do_test 2.1.20 { sorter_count { INSERT OR ABORT INTO x3 SELECT * FROM t2 } } 1
do_test 2.1.21 { sorter_count { INSERT OR ABORT INTO x4 SELECT * FROM t2 } } 1


foreach {tn scount schema} {
  2.1   0 { CREATE TABLE t1(a UNIQUE ON CONFLICT FAIL, b, c) }
  2.2   0 { CREATE TABLE t1(a, b UNIQUE ON CONFLICT IGNORE, c) }
  2.3   0 { CREATE TABLE t1(a, b, c UNIQUE ON CONFLICT REPLACE) }
  2.4   0 { CREATE TABLE t1(a PRIMARY KEY ON CONFLICT FAIL, b, c) }
  2.5   0 { CREATE TABLE t1(a, b PRIMARY KEY ON CONFLICT IGNORE, c) }
  2.6   0 { CREATE TABLE t1(a, b, c PRIMARY KEY ON CONFLICT REPLACE) }
  2.7   0 { 
    CREATE TABLE t1(a PRIMARY KEY ON CONFLICT FAIL, b, c) WITHOUT ROWID
  }
  2.8   0 { 
    CREATE TABLE t1(a, b PRIMARY KEY ON CONFLICT IGNORE, c) WITHOUT ROWID
  }
  2.9   0 { 
    CREATE TABLE t1(a, b, c PRIMARY KEY ON CONFLICT REPLACE) WITHOUT ROWID
  }

  3.1   1 {
    CREATE TABLE t1(a, b, c);
    CREATE INDEX i1 ON t1(a);
  }
  3.2   0 {
    CREATE TABLE t1(a, b, c);
    CREATE INDEX i1 ON t1(a);
    CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN SELECT 1; END;
  }
  3.3   0 {
    CREATE TABLE t1(a, b, c);
    CREATE INDEX i1 ON t1(a);
    CREATE TRIGGER tr2 BEFORE INSERT ON t1 BEGIN SELECT 1; END;
  }

  4.1   2 {
    CREATE TABLE t1(a PRIMARY KEY, b, c);
    CREATE INDEX i1 ON t1(a);
    CREATE TABLE c1(x, y REFERENCES t1 DEFERRABLE INITIALLY DEFERRED);
    PRAGMA foreign_keys = 0;
  }
  4.2   0 {
    CREATE TABLE t1(a PRIMARY KEY, b, c);
    CREATE INDEX i1 ON t1(a);
    CREATE TABLE c1(x, y REFERENCES t1 DEFERRABLE INITIALLY DEFERRED);
    PRAGMA foreign_keys = 1;
  }

  4.3   1 {
    CREATE TABLE p1(x, y UNIQUE);
    CREATE TABLE t1(a, b, c REFERENCES p1(y));
    CREATE INDEX i1 ON t1(a);
    PRAGMA foreign_keys = 0;
  }
  4.4   0 {
    CREATE TABLE p1(x, y UNIQUE);
    CREATE TABLE t1(a, b, c REFERENCES p1(y));
    CREATE INDEX i1 ON t1(a);
    PRAGMA foreign_keys = 1;
  }

} {
  execsql { 
    DROP TABLE IF EXISTS t1;
    DROP TABLE IF EXISTS c1;
    DROP TABLE IF EXISTS p1;
  }

  do_test 2.2.$tn {
    execsql $schema
    sorter_count { INSERT INTO t1 SELECT * FROM t2 }
  } $scount
}

#-------------------------------------------------------------------------
# Test that if a UNIQUE constraint is violated and the on conflict mode
# is either ABORT or ROLLBACK, the conflict is handled correctly.
#
#   3.2: Check that conflicts are actually detected. 
#   3.3: Check that OR ROLLBACK really does rollback the transaction.
#   3.4: Check that OR ABORT does not.
#
do_execsql_test 3.1 {
  DROP TABLE IF EXISTS t1;
  CREATE TABLE t1(a PRIMARY KEY, b, c, UNIQUE(b, c));
  INSERT INTO t1 VALUES(1, 2, 3);
  INSERT INTO t1 VALUES(4, 5, 6);
  INSERT INTO t1 VALUES(7, 8, 9);
  CREATE TABLE src(a, b, c);
}

do_catchsql_test 3.2.1 {
  INSERT INTO src VALUES (10, 11, 12), (7, 14, 12);
  INSERT INTO t1 SELECT * FROM src;
} {1 {UNIQUE constraint failed: t1.a}}

do_catchsql_test 3.2.2 {
  DELETE FROM src;
  INSERT INTO src VALUES (10, 11, 12), (13, 5, 6);
  INSERT INTO t1 SELECT * FROM src;
} {1 {UNIQUE constraint failed: t1.b, t1.c}}

do_catchsql_test 3.2.3.1 {
  CREATE TABLE t3(a);
  CREATE UNIQUE INDEX t3a ON t3(a);

  CREATE TABLE t3src(a);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<10 )
  INSERT INTO t3src SELECT 'abc' FROM cnt;
} {0 {}}

#  execsql { PRAGMA vdbe_trace = 1 }
do_catchsql_test 3.2.3.2 {
  INSERT INTO t3 SELECT * FROM t3src;
} {1 {UNIQUE constraint failed: t3.a}}

do_catchsql_test 3.3.1 {
  DELETE FROM src;
  BEGIN;
    INSERT INTO src VALUES (10, 11, 12), (7, 13, 14);
    INSERT OR ROLLBACK INTO t1 SELECT * FROM src;
} {1 {UNIQUE constraint failed: t1.a}}
do_catchsql_test 3.3.2 {
  DELETE FROM src;
  BEGIN;
    INSERT INTO src VALUES (10, 11, 12), (13, 5, 6);
    INSERT OR ROLLBACK INTO t1 SELECT * FROM src;
} {1 {UNIQUE constraint failed: t1.b, t1.c}}
do_test 3.3.3 {
  sqlite3_get_autocommit db
} 1

do_catchsql_test 3.4.1 {
  DELETE FROM src;
  BEGIN;
    INSERT INTO src VALUES (10, 11, 12), (7, 14, 12);
    INSERT OR ABORT INTO t1 SELECT * FROM src;
} {1 {UNIQUE constraint failed: t1.a}}
do_catchsql_test 3.4.2 {
  ROLLBACK;
  DELETE FROM src;
  BEGIN;
    INSERT INTO src VALUES (10, 11, 12), (13, 5, 6);
    INSERT OR ABORT INTO t1 SELECT * FROM src;
} {1 {UNIQUE constraint failed: t1.b, t1.c}}
do_test 3.4.3 {
  sqlite3_get_autocommit db
} 0
do_execsql_test 3.4.4 { ROLLBACK }

#-------------------------------------------------------------------------
# The following tests - 4.* - check that this optimization is actually
# doing something helpful. They do this by executing a big 
# "INSERT INTO SELECT" statement in wal mode with a small pager cache.
# Once with "OR FAIL" (so that the sorters are not used) and once with
# the default "OR ABORT" (so that they are).
#
# If the sorters are doing their job, the wal file generated by the 
# "OR ABORT" case should be much smaller than the "OR FAIL" trial.
#

proc odd_collate {lhs rhs} {
  string compare [string range $lhs 6 end] [string range $rhs 6 end]
}

proc do_insert6_4_test {tn sql} {

  reset_db
  db collate odd_collate odd_collate
  execsql $sql
  db_save_and_close

  foreach {tn2 ::onerror ::var} {
    1 "OR ABORT" ::sz1
    2 "OR FAIL"  ::sz2
  } {
    do_test $tn.$tn2 {
      db_restore_and_reopen
      db collate odd_collate odd_collate
      execsql "
        PRAGMA journal_mode = wal;
        PRAGMA cache_size = 5;
        PRAGMA wal_autocheckpoint = 0;
        INSERT $onerror INTO t1 SELECT * FROM src;
      "
      set $var [file size test.db-wal]
      db close
    } {}
  }

  do_test $tn.3.($::sz1<$::sz2) {
    expr {$sz1 < ($sz2/2)}
  } 1

  sqlite3 db test.db
  db collate odd_collate odd_collate
  integrity_check $tn.4 
}

do_insert6_4_test 4.1 {
  CREATE TABLE t1(a, b, c);
  CREATE UNIQUE INDEX t1a ON t1(a);
  CREATE UNIQUE INDEX t1bc ON t1(b, c);

  CREATE TABLE src(x, y, z);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<2999 )
  INSERT INTO src 
  SELECT randomblob(50), randomblob(50), randomblob(50) FROM cnt;
}

do_insert6_4_test 4.2 {
  CREATE TABLE t1(a INTEGER PRIMARY KEY, b, x);
  CREATE UNIQUE INDEX t1b ON t1(b);
  CREATE INDEX t1x1 ON t1(x);
  CREATE INDEX t1x2 ON t1(x);
  CREATE INDEX t1x3 ON t1(x);
  CREATE INDEX t1x4 ON t1(x);

  CREATE TABLE src(a, b, x);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<2999 )
  INSERT INTO src 
  SELECT random(), x, zeroblob(50) FROM cnt;
}

do_insert6_4_test 4.3 {
  CREATE TABLE t1(a, b, c);
  CREATE UNIQUE INDEX t1ab ON t1(a, b);
  CREATE UNIQUE INDEX t1ac ON t1(a, c);

  CREATE TABLE src(a, b, c);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<2999 )
  INSERT INTO src 
  SELECT zeroblob(50), randomblob(50), randomblob(50) FROM cnt;
}

db collate odd_collate odd_collate
do_insert6_4_test 4.5 {
  CREATE TABLE t1(t COLLATE odd_collate, v COLLATE odd_collate);
  CREATE UNIQUE INDEX t1t ON t1(t);
  CREATE UNIQUE INDEX t1v ON t1(v);

  CREATE TABLE src(t, v);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<2999 )
  INSERT INTO src 
  SELECT hex(randomblob(50)), hex(randomblob(50)) FROM cnt;
}

db collate odd_collate odd_collate
do_insert6_4_test 4.6 {
  CREATE TABLE t1(t COLLATE odd_collate PRIMARY KEY) WITHOUT ROWID;
  CREATE TABLE src(t);
  WITH cnt(x) AS ( SELECT 0 UNION ALL SELECT x+1 FROM cnt WHERE x<2999 )
  INSERT INTO src 
  SELECT hex(randomblob(50)) FROM cnt;
}

finish_test

    DROP TABLE t1;
  }
} {}

do_execsql_test stat-2.1 {
  CREATE TABLE t3(a PRIMARY KEY, b);
  INSERT INTO t3(rowid, a, b) VALUES(2, a_string(111), a_string(222));
  INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
    FROM stat WHERE name != 'sqlite_master';
} [list \
  sqlite_autoindex_t3_1 / 3 internal 3 368 623 125       \
  sqlite_autoindex_t3_1 /000/ 8 leaf 8 946 46 123        \
  sqlite_autoindex_t3_1 /001/ 9 leaf 8 988 2 131         \

    DROP TABLE t1;
  }
} {}

do_execsql_test stat-2.1 {
  CREATE TABLE t3(a PRIMARY KEY, b);
  INSERT INTO t3(rowid, a, b) VALUES(2, a_string(111), a_string(222));
  INSERT OR FAIL INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT OR FAIL INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT OR FAIL INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT OR FAIL INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  INSERT OR FAIL INTO t3 SELECT a_string(110+rowid), a_string(221+rowid) FROM t3
   ORDER BY rowid;
  SELECT name, path, pageno, pagetype, ncell, payload, unused, mx_payload
    FROM stat WHERE name != 'sqlite_master';
} [list \
  sqlite_autoindex_t3_1 / 3 internal 3 368 623 125       \
  sqlite_autoindex_t3_1 /000/ 8 leaf 8 946 46 123        \
  sqlite_autoindex_t3_1 /001/ 9 leaf 8 988 2 131         \

  execsql { INSERT INTO t1 VALUES( blob(900) ) }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 3 [wal_file_size 4 1024]]

do_test wal-11.4 {
  execsql { 
    BEGIN;
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 2
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 4
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 8
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 16
  }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 3 [wal_file_size 32 1024]]
do_test wal-11.5 {
  execsql { 
    SELECT count(*) FROM t1;
    PRAGMA integrity_check;
................................................................................
set nWal 39
if {[permutation]!="mmap"} {set nWal 37}
ifcapable !mmap {set nWal 37}
do_test wal-11.10 {
  execsql {
    PRAGMA cache_size = 10;
    BEGIN;
      INSERT INTO t1 SELECT blob(900) FROM t1;   -- 32
      SELECT count(*) FROM t1;
  }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 37 [wal_file_size $nWal 1024]]
do_test wal-11.11 {
  execsql {
      SELECT count(*) FROM t1;

  execsql { INSERT INTO t1 VALUES( blob(900) ) }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 3 [wal_file_size 4 1024]]

do_test wal-11.4 {
  execsql { 
    BEGIN;
      INSERT OR FAIL INTO t1 SELECT blob(900) FROM t1;   -- 2
      INSERT OR FAIL INTO t1 SELECT blob(900) FROM t1;   -- 4
      INSERT OR FAIL INTO t1 SELECT blob(900) FROM t1;   -- 8
      INSERT OR FAIL INTO t1 SELECT blob(900) FROM t1;   -- 16
  }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 3 [wal_file_size 32 1024]]
do_test wal-11.5 {
  execsql { 
    SELECT count(*) FROM t1;
    PRAGMA integrity_check;
................................................................................
set nWal 39
if {[permutation]!="mmap"} {set nWal 37}
ifcapable !mmap {set nWal 37}
do_test wal-11.10 {
  execsql {
    PRAGMA cache_size = 10;
    BEGIN;
      INSERT OR FAIL INTO t1 SELECT blob(900) FROM t1;   -- 32
      SELECT count(*) FROM t1;
  }
  list [expr [file size test.db]/1024] [file size test.db-wal]
} [list 37 [wal_file_size $nWal 1024]]
do_test wal-11.11 {
  execsql {
      SELECT count(*) FROM t1;