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