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// query.h
#pragma once
#include "../stdafx.h"
#include "../grid/message.h"
#include "jsobj.h"
#include "storage.h"
/* requests:
dbDelete
int reserved=0;
string collection;
int flags=0; // 1=DeleteSingle
JSObject query;
dbUpdate:
int reserved;
string collection;
int flags; // 1=upsert
JSObject query;
JSObject objectToUpdate;
objectToUpdate may include { $inc: <field> }.
dbQuery:
int reserved;
string collection;
int nToSkip;
int nToReturn; // how many you want back as the beginning of the cursor data
JSObject query;
[JSObject fieldsToReturn]
dbGetMore:
int reserved;
string collection; // redundant, might use for security.
int nToReturn;
int64 cursorID;
dbKillCursors=2007:
int reserved;
int n;
int64 cursorIDs[n];
Note that on Update, there is only one object, which is different
from insert where you can pass a list of objects to insert in the db.
Note that the update field layout is very similar layout to Query.
*/
/* db response format
Query or GetMore:
int reserved;
int64 cursorID;
int startingFrom;
int nReturned; // 0=infinity
list of marshalled JSObjects;
*/
#pragma pack(push)
#pragma pack(1)
struct QueryResult : public MsgData {
long long cursorId;
int startingFrom;
int nReturned;
const char *data() { return (char *) (((int *)&nReturned)+1); }
};
#pragma pack(pop)
QueryResult* getMore(const char *ns, int ntoreturn, long long cursorid);
// caller must free() returned QueryResult.
QueryResult* runQuery(Message&, const char *ns, int ntoskip, int ntoreturn,
JSObj j, auto_ptr< set<string> > fieldFilter,
stringstream&);
void updateObjects(const char *ns, JSObj updateobj, JSObj pattern, bool upsert, stringstream& ss);
void deleteObjects(const char *ns, JSObj pattern, bool justOne);
#include "clientcursor.h"
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