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Overview
Comment:Tweaks to help facilitate structural test coverage.
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SHA1: ff49a5f00b3aa83bdacc95a32d60527c740a6c09
User & Date: drh 2010-09-28 06:00:48
Context
2010-09-28
07:11
Replace some unreachable branch instructions with assert() statements. Closed-Leaf check-in: 88b84bf1 user: drh tags: bug-b351d95f9c
06:00
Tweaks to help facilitate structural test coverage. check-in: ff49a5f0 user: drh tags: bug-b351d95f9c
04:14
Test case and fix for the specific failure of ticket [b351d95f9cd5ef17e9d9dbae]. check-in: 57789cfe user: drh tags: bug-b351d95f9c
Changes
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Changes to src/expr.c.

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  int target,        /* Where to write results */
  int doHardCopy     /* Make a hard copy of every element */
){
  struct ExprList_item *pItem;
  int i, n;
  assert( pList!=0 );
  assert( target>0 );


  n = pList->nExpr;
  for(pItem=pList->a, i=0; i<n; i++, pItem++){
    Expr *pExpr = pItem->pExpr;
    int inReg = sqlite3ExprCodeTarget(pParse, pExpr, target+i);
    assert( pParse->pVdbe || pParse->db->mallocFailed );
    if( inReg!=target+i && pParse->pVdbe ){
      sqlite3VdbeAddOp2(pParse->pVdbe, doHardCopy ? OP_Copy : OP_SCopy,
                        inReg, target+i);
    }
  }
  return n;
}








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  int target,        /* Where to write results */
  int doHardCopy     /* Make a hard copy of every element */
){
  struct ExprList_item *pItem;
  int i, n;
  assert( pList!=0 );
  assert( target>0 );
  assert( pParse->pVdbe || pParse->db->mallocFailed );
  if( pParse->pVdbe==0 ) return 0;
  n = pList->nExpr;
  for(pItem=pList->a, i=0; i<n; i++, pItem++){
    Expr *pExpr = pItem->pExpr;
    int inReg = sqlite3ExprCodeTarget(pParse, pExpr, target+i);

    if( inReg!=target+i ){
      sqlite3VdbeAddOp2(pParse->pVdbe, doHardCopy ? OP_Copy : OP_SCopy,
                        inReg, target+i);
    }
  }
  return n;
}

Changes to src/vdbe.c.

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  ** and have an assigned type.  The results are de-ephemeralized as
  ** as side effect.
  */
  pMem = p->pResultSet = &aMem[pOp->p1];
  for(i=0; i<pOp->p2; i++){
    assert( memIsValid(&pMem[i]) );
    Deephemeralize(&pMem[i]);


    sqlite3VdbeMemNulTerminate(&pMem[i]);
    sqlite3VdbeMemStoreType(&pMem[i]);
    REGISTER_TRACE(pOp->p1+i, &pMem[i]);
  }
  if( db->mallocFailed ) goto no_mem;

  /* Return SQLITE_ROW







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  ** and have an assigned type.  The results are de-ephemeralized as
  ** as side effect.
  */
  pMem = p->pResultSet = &aMem[pOp->p1];
  for(i=0; i<pOp->p2; i++){
    assert( memIsValid(&pMem[i]) );
    Deephemeralize(&pMem[i]);
    assert( (pMem[i].flags & MEM_Ephem)==0
            || (pMem[i].flags & (MEM_Str|MEM_Blob))==0 );
    sqlite3VdbeMemNulTerminate(&pMem[i]);
    sqlite3VdbeMemStoreType(&pMem[i]);
    REGISTER_TRACE(pOp->p1+i, &pMem[i]);
  }
  if( db->mallocFailed ) goto no_mem;

  /* Return SQLITE_ROW