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Overview
Comment:Fix the UPDATE command so that each changes is independent.
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 7b79de256484ae3a9d083c9e79a6f2fa835e65b2
User & Date: drh 2011-07-28 15:29:12
Context
2011-07-28
16:00
Add aggregate functions min(), max(), avg(), sum(), and array(). Enhance count() to accept either one or zero arguments. check-in: 0ef5e83925 user: dan tags: trunk
15:29
Fix the UPDATE command so that each changes is independent. check-in: 7b79de2564 user: drh tags: trunk
2011-07-27
16:23
Add the ".json" command to shell.c. ".json" is like ".result", but removes excess white-space and quotes unquoted identifiers from the test result before comparing it with the library output. This allows us to make test files more readable. check-in: 1e6ab63d25 user: dan tags: trunk
Changes
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Changes to src/json.c. 

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    p->nRef++;
  }
  return p;
}


/*
** Return an editable JSON object.  A JSON object is editable if its
** reference count is exactly 1.  If the input JSON object has a reference
** count greater than 1, then make a copy and return the copy.
*/
JsonNode *xjd1JsonEdit(JsonNode *p){
  JsonNode *pNew;
  if( p==0 ) return 0;
  if( p->nRef==1 ) return p;
  pNew = xjd1JsonNew(0);
  if( pNew==0 ) return 0;
  pNew->eJType = p->eJType;
  pNew->u = p->u;
  switch( pNew->eJType ){
    case XJD1_STRING: {
      pNew->u.z = xjd1PoolDup(0, p->u.z, -1);
................................................................................
      pNew->u.ar.apElem = ap = xjd1_malloc( sizeof(JsonNode*)*p->u.ar.nElem );
      if( ap==0 ){
        pNew->eJType = XJD1_NULL;
      }else{
        int i;
        pNew->u.ar.nElem = p->u.ar.nElem;
        for(i=0; i<p->u.ar.nElem; i++){
          ap[i] = xjd1JsonRef(p->u.ar.apElem[i]);
        }
      }
      break;
    }
    case XJD1_STRUCT: {
      JsonStructElem *pSrc, *pDest, **ppPrev;
      ppPrev = &pNew->u.st.pFirst;
................................................................................
      for(pSrc=p->u.st.pFirst; pSrc; pSrc=pSrc->pNext){
        pNew->u.st.pLast = pDest = xjd1_malloc( sizeof(*pDest) );
        if( pDest==0 ) break;
        memset(pDest, 0, sizeof(*pDest));
        *ppPrev = pDest;
        ppPrev = &pDest->pNext;
        pDest->zLabel = xjd1PoolDup(0, pSrc->zLabel, -1);
        pDest->pValue = xjd1JsonRef(pSrc->pValue);
      }
      break;
    }
  }
  p->nRef--;
  return pNew;
}













/* Render a string as a string literal.
*/
void renderString(String *pOut, const char *z){
  int n, i, j, c;
  char *zOut;








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    p->nRef++;
  }
  return p;
}


/*
** Return a deep copy of a JSON object.


*/
JsonNode *xjd1JsonDeepCopy(JsonNode *p){
  JsonNode *pNew;
  if( p==0 ) return 0;

  pNew = xjd1JsonNew(0);
  if( pNew==0 ) return 0;
  pNew->eJType = p->eJType;
  pNew->u = p->u;
  switch( pNew->eJType ){
    case XJD1_STRING: {
      pNew->u.z = xjd1PoolDup(0, p->u.z, -1);
................................................................................
      pNew->u.ar.apElem = ap = xjd1_malloc( sizeof(JsonNode*)*p->u.ar.nElem );
      if( ap==0 ){
        pNew->eJType = XJD1_NULL;
      }else{
        int i;
        pNew->u.ar.nElem = p->u.ar.nElem;
        for(i=0; i<p->u.ar.nElem; i++){
          ap[i] = xjd1JsonDeepCopy(p->u.ar.apElem[i]);
        }
      }
      break;
    }
    case XJD1_STRUCT: {
      JsonStructElem *pSrc, *pDest, **ppPrev;
      ppPrev = &pNew->u.st.pFirst;
................................................................................
      for(pSrc=p->u.st.pFirst; pSrc; pSrc=pSrc->pNext){
        pNew->u.st.pLast = pDest = xjd1_malloc( sizeof(*pDest) );
        if( pDest==0 ) break;
        memset(pDest, 0, sizeof(*pDest));
        *ppPrev = pDest;
        ppPrev = &pDest->pNext;
        pDest->zLabel = xjd1PoolDup(0, pSrc->zLabel, -1);
        pDest->pValue = xjd1JsonDeepCopy(pSrc->pValue);
      }
      break;
    }
  }

  return pNew;
}

/*
** Return an editable JSON object.  A JSON object is editable if its
** reference count is exactly 1.  If the input JSON object has a reference
** count greater than 1, then make a copy and return the copy.
*/
JsonNode *xjd1JsonEdit(JsonNode *p){
  if( p==0 ) return 0;
  if( p->nRef==1 ) return p;
  return xjd1JsonDeepCopy(p);
}


/* Render a string as a string literal.
*/
void renderString(String *pOut, const char *z){
  int n, i, j, c;
  char *zOut;

Changes to src/update.c. 

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      pStmt->pDoc = xjd1JsonParse(zJson, -1);
      if( pCmd->u.update.pWhere==0 || xjd1ExprTrue(pCmd->u.update.pWhere) ){
        JsonNode *pNewDoc;  /* Revised document content */
        ExprList *pChng;    /* List of changes */
        String jsonNewDoc;  /* Text rendering of revised document */
        int i, n;

        pNewDoc  = xjd1JsonRef(pStmt->pDoc);
        pChng = pCmd->u.update.pChng;
        n = pChng->nEItem;
        for(i=0; i<n-1; i += 2){
          Expr *pLvalue = pChng->apEItem[i].pExpr;
          Expr *pExpr = pChng->apEItem[i+1].pExpr;
          reviseOneField(pNewDoc, pLvalue, pExpr);
        }








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      pStmt->pDoc = xjd1JsonParse(zJson, -1);
      if( pCmd->u.update.pWhere==0 || xjd1ExprTrue(pCmd->u.update.pWhere) ){
        JsonNode *pNewDoc;  /* Revised document content */
        ExprList *pChng;    /* List of changes */
        String jsonNewDoc;  /* Text rendering of revised document */
        int i, n;

        pNewDoc = xjd1JsonEdit(xjd1JsonRef(pStmt->pDoc));
        pChng = pCmd->u.update.pChng;
        n = pChng->nEItem;
        for(i=0; i<n-1; i += 2){
          Expr *pLvalue = pChng->apEItem[i].pExpr;
          Expr *pExpr = pChng->apEItem[i+1].pExpr;
          reviseOneField(pNewDoc, pLvalue, pExpr);
        }

Changes to src/xjd1Int.h. 

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JsonNode *xjd1JsonRef(JsonNode*);
void xjd1JsonRender(String*, const JsonNode*);
int xjd1JsonToReal(const JsonNode*, double*);
int xjd1JsonToString(const JsonNode*, String*);
int xjd1JsonCompare(const JsonNode*, const JsonNode*);
JsonNode *xjd1JsonNew(Pool*);
JsonNode *xjd1JsonEdit(JsonNode*);

void xjd1JsonFree(JsonNode*);
void xjd1JsonToNull(JsonNode*);
void xjd1DequoteString(char*,int);
int xjd1JsonInsert(JsonNode *, const char *, JsonNode *);
int xjd1JsonTidy(String *, const char *);

/******************************** memory.c ***********************************/








>








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JsonNode *xjd1JsonRef(JsonNode*);
void xjd1JsonRender(String*, const JsonNode*);
int xjd1JsonToReal(const JsonNode*, double*);
int xjd1JsonToString(const JsonNode*, String*);
int xjd1JsonCompare(const JsonNode*, const JsonNode*);
JsonNode *xjd1JsonNew(Pool*);
JsonNode *xjd1JsonEdit(JsonNode*);
JsonNode *xjd1JsonDeepCopy(JsonNode*);
void xjd1JsonFree(JsonNode*);
void xjd1JsonToNull(JsonNode*);
void xjd1DequoteString(char*,int);
int xjd1JsonInsert(JsonNode *, const char *, JsonNode *);
int xjd1JsonTidy(String *, const char *);

/******************************** memory.c ***********************************/

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