SQLite

  } aMod[] = {
    { "json_each",            &jsonEachModule               },
    { "json_tree",            &jsonTreeModule               },
  };
#endif
  for(i=0; i<sizeof(aFunc)/sizeof(aFunc[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_function(db, aFunc[i].zName, aFunc[i].nArg,
                        SQLITE_UTF8 | SQLITE_DETERMINISTIC | SQLITE_SUBTYPE, 
                        (void*)&aFunc[i].flag,
                        aFunc[i].xFunc, 0, 0);
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC,
                                 (void*)&aFunc[i].flag,
                                 aFunc[i].xFunc, 0, 0);
  }
#ifndef SQLITE_OMIT_WINDOWFUNC
  for(i=0; i<sizeof(aAgg)/sizeof(aAgg[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_window_function(db, aAgg[i].zName, aAgg[i].nArg,
                                 SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
                SQLITE_SUBTYPE | SQLITE_UTF8 | SQLITE_DETERMINISTIC, 0,
                                 aAgg[i].xStep, aAgg[i].xFinal,
                                 aAgg[i].xValue, jsonGroupInverse, 0);
  }
#endif
#ifndef SQLITE_OMIT_VIRTUALTABLE
  for(i=0; i<sizeof(aMod)/sizeof(aMod[0]) && rc==SQLITE_OK; i++){
    rc = sqlite3_create_module(db, aMod[i].zName, aMod[i].pModule, 0);

** The SQLITE_DETERMINISTIC flag means that the new function will always
** maps the same inputs into the same output.  The abs() function is
** deterministic, for example, but randomblob() is not.
**
** The SQLITE_DIRECTONLY flag means that the function may only be invoked
** from top-level SQL, and cannot be used in VIEWs or TRIGGERs.
**
** The SQLITE_SUBTYPE flag indicates to SQLite that the function may call
** [sqlite3_result_subtype()] in order to configure its return value with
** a sub-type.
** The SQLITE_SUBTYPE flag indicates to SQLite that a function may call
** [sqlite3_value_subtype()] to inspect the sub-types of its arguments.
** Specifying this flag makes no difference for scalar or aggregate user
** functions. However, if it is not specified for a user-defined window
** function, then any sub-types belonging to arguments passed to the window
** function may be discarded before the window function is called (i.e.
** sqlite3_value_subtype() will always return 0).
*/
#define SQLITE_DETERMINISTIC    0x000000800
#define SQLITE_DIRECTONLY       0x000080000
#define SQLITE_SUBTYPE          0x000100000

/*
** CAPI3REF: Deprecated Functions

  sWalker.u.pRewrite = &sRewrite;

  (void)sqlite3WalkExprList(&sWalker, pEList);

  *ppSub = sRewrite.pSub;
}

/*
** Return true if the top-level of list pList contains an SQL function 
** with the SQLITE_FUNC_SUBTYPE flag set. Return false otherwise.
*/
int exprListContainsSubtype(Parse *pParse, ExprList *pList){
  if( pList ){
    sqlite3 *db = pParse->db;
    int i;
    for(i=0; i<pList->nExpr; i++){
      Expr *p = pList->a[i].pExpr;
      if( p->op==TK_FUNCTION ){
        FuncDef *pDef;
        int nArg = 0;
        if( !ExprHasProperty(p, EP_TokenOnly) && p->x.pList ){
          nArg = p->x.pList->nExpr;
        }
        pDef = sqlite3FindFunction(db, p->u.zToken, nArg, db->enc, 0);
        if( pDef && (pDef->funcFlags & SQLITE_FUNC_SUBTYPE) ){
          return 1;
        }
      }
    }
  }
  return 0;
}

/*
** Append a copy of each expression in expression-list pAppend to
** expression list pList. Return a pointer to the result list.
*/
static ExprList *exprListAppendList(
  Parse *pParse,          /* Parsing context */
  ExprList *pList,        /* List to which to append. Might be NULL */

    /* Append the arguments passed to each window function to the
    ** sub-select expression list. Also allocate two registers for each
    ** window function - one for the accumulator, another for interim
    ** results.  */
    for(pWin=pMWin; pWin; pWin=pWin->pNextWin){
      ExprList *pArgs = pWin->pOwner->x.pList;
      if( exprListContainsSubtype(pParse, pArgs) ){
      if( pWin->pFunc->funcFlags & SQLITE_FUNC_SUBTYPE ){
        selectWindowRewriteEList(pParse, pMWin, pSrc, pArgs, pTab, &pSublist);
        pWin->iArgCol = (pSublist ? pSublist->nExpr : 0);
        pWin->bExprArgs = 1;
      }else{
        pWin->iArgCol = (pSublist ? pSublist->nExpr : 0);
        pSublist = exprListAppendList(pParse, pSublist, pArgs, 0);
      }