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mongodb/db/update.cpp

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// update.cpp
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pch.h"
#include "query.h"
#include "pdfile.h"
#include "jsobjmanipulator.h"
#include "queryoptimizer.h"
#include "repl.h"
#include "update.h"
#include "btree.h"
//#define DEBUGUPDATE(x) cout << x << endl;
#define DEBUGUPDATE(x)
namespace mongo {
const char* Mod::modNames[] = { "$inc", "$set", "$push", "$pushAll", "$pull", "$pullAll" , "$pop", "$unset" ,
"$bitand" , "$bitor" , "$bit" , "$addToSet", "$rename", "$rename" };
unsigned Mod::modNamesNum = sizeof(Mod::modNames)/sizeof(char*);
bool Mod::_pullElementMatch( BSONElement& toMatch ) const {
if ( elt.type() != Object ){
// if elt isn't an object, then comparison will work
return toMatch.woCompare( elt , false ) == 0;
}
if ( matcherOnPrimitive )
return matcher->matches( toMatch.wrap( "" ) );
if ( toMatch.type() != Object ){
// looking for an object, so this can't match
return false;
}
// now we have an object on both sides
return matcher->matches( toMatch.embeddedObject() );
}
template< class Builder >
void Mod::appendIncremented( Builder& bb , const BSONElement& in, ModState& ms ) const {
BSONType a = in.type();
BSONType b = elt.type();
if ( a == NumberDouble || b == NumberDouble ){
ms.incType = NumberDouble;
ms.incdouble = elt.numberDouble() + in.numberDouble();
}
else if ( a == NumberLong || b == NumberLong ){
ms.incType = NumberLong;
ms.inclong = elt.numberLong() + in.numberLong();
}
else {
int x = elt.numberInt() + in.numberInt();
if ( x < 0 && elt.numberInt() > 0 && in.numberInt() > 0 ){
// overflow
ms.incType = NumberLong;
ms.inclong = elt.numberLong() + in.numberLong();
}
else {
ms.incType = NumberInt;
ms.incint = elt.numberInt() + in.numberInt();
}
}
ms.appendIncValue( bb , false );
}
template< class Builder >
void appendUnset( Builder &b ) {
}
template<>
void appendUnset( BSONArrayBuilder &b ) {
b.appendNull();
}
template< class Builder >
void Mod::apply( Builder& b , BSONElement in , ModState& ms ) const {
if ( ms.dontApply ) {
return;
}
switch ( op ){
case INC: {
appendIncremented( b , in , ms );
break;
}
case SET: {
_checkForAppending( elt );
b.appendAs( elt , shortFieldName );
break;
}
case UNSET: {
appendUnset( b );
break;
}
case PUSH: {
uassert( 10131 , "$push can only be applied to an array" , in.type() == Array );
BSONObjBuilder bb( b.subarrayStart( shortFieldName ) );
BSONObjIterator i( in.embeddedObject() );
int n=0;
while ( i.more() ){
bb.append( i.next() );
n++;
}
ms.pushStartSize = n;
bb.appendAs( elt , bb.numStr( n ) );
bb.done();
break;
}
case ADDTOSET: {
uassert( 12592 , "$addToSet can only be applied to an array" , in.type() == Array );
BSONObjBuilder bb( b.subarrayStart( shortFieldName ) );
BSONObjIterator i( in.embeddedObject() );
int n=0;
if ( isEach() ){
BSONElementSet toadd;
parseEach( toadd );
while ( i.more() ){
BSONElement cur = i.next();
bb.append( cur );
n++;
toadd.erase( cur );
}
{
BSONObjIterator i( getEach() );
while ( i.more() ){
BSONElement e = i.next();
if ( toadd.count(e) ){
bb.appendAs( e , BSONObjBuilder::numStr( n++ ) );
toadd.erase( e );
}
}
}
}
else {
bool found = false;
while ( i.more() ){
BSONElement cur = i.next();
bb.append( cur );
n++;
if ( elt.woCompare( cur , false ) == 0 )
found = true;
}
if ( ! found )
bb.appendAs( elt , bb.numStr( n ) );
}
bb.done();
break;
}
case PUSH_ALL: {
uassert( 10132 , "$pushAll can only be applied to an array" , in.type() == Array );
uassert( 10133 , "$pushAll has to be passed an array" , elt.type() );
BSONObjBuilder bb( b.subarrayStart( shortFieldName ) );
BSONObjIterator i( in.embeddedObject() );
int n=0;
while ( i.more() ){
bb.append( i.next() );
n++;
}
ms.pushStartSize = n;
i = BSONObjIterator( elt.embeddedObject() );
while ( i.more() ){
bb.appendAs( i.next() , bb.numStr( n++ ) );
}
bb.done();
break;
}
case PULL:
case PULL_ALL: {
uassert( 10134 , "$pull/$pullAll can only be applied to an array" , in.type() == Array );
BSONObjBuilder bb( b.subarrayStart( shortFieldName ) );
int n = 0;
BSONObjIterator i( in.embeddedObject() );
while ( i.more() ){
BSONElement e = i.next();
bool allowed = true;
if ( op == PULL ){
allowed = ! _pullElementMatch( e );
}
else {
BSONObjIterator j( elt.embeddedObject() );
while( j.more() ) {
BSONElement arrJ = j.next();
if ( e.woCompare( arrJ, false ) == 0 ){
allowed = false;
break;
}
}
}
if ( allowed )
bb.appendAs( e , bb.numStr( n++ ) );
}
bb.done();
break;
}
case POP: {
uassert( 10135 , "$pop can only be applied to an array" , in.type() == Array );
BSONObjBuilder bb( b.subarrayStart( shortFieldName ) );
int n = 0;
BSONObjIterator i( in.embeddedObject() );
if ( elt.isNumber() && elt.number() < 0 ){
// pop from front
if ( i.more() ){
i.next();
n++;
}
while( i.more() ) {
bb.appendAs( i.next() , bb.numStr( n - 1 ) );
n++;
}
}
else {
// pop from back
while( i.more() ) {
n++;
BSONElement arrI = i.next();
if ( i.more() ){
bb.append( arrI );
}
}
}
ms.pushStartSize = n;
assert( ms.pushStartSize == in.embeddedObject().nFields() );
bb.done();
break;
}
case BIT: {
uassert( 10136 , "$bit needs an array" , elt.type() == Object );
uassert( 10137 , "$bit can only be applied to numbers" , in.isNumber() );
uassert( 10138 , "$bit can't use a double" , in.type() != NumberDouble );
int x = in.numberInt();
long long y = in.numberLong();
BSONObjIterator it( elt.embeddedObject() );
while ( it.more() ){
BSONElement e = it.next();
uassert( 10139 , "$bit field must be number" , e.isNumber() );
if ( strcmp( e.fieldName() , "and" ) == 0 ){
switch( in.type() ){
case NumberInt: x = x&e.numberInt(); break;
case NumberLong: y = y&e.numberLong(); break;
default: assert( 0 );
}
}
else if ( strcmp( e.fieldName() , "or" ) == 0 ){
switch( in.type() ){
case NumberInt: x = x|e.numberInt(); break;
case NumberLong: y = y|e.numberLong(); break;
default: assert( 0 );
}
}
else {
throw UserException( 9016, (string)"unknown bit mod:" + e.fieldName() );
}
}
switch( in.type() ){
case NumberInt: b.append( shortFieldName , x ); break;
case NumberLong: b.append( shortFieldName , y ); break;
default: assert( 0 );
}
break;
}
case RENAME_FROM: {
break;
}
case RENAME_TO: {
ms.handleRename( b, shortFieldName );
break;
}
default:
stringstream ss;
ss << "Mod::apply can't handle type: " << op;
throw UserException( 9017, ss.str() );
}
}
// -1 inside a non-object (non-object could be array)
// 0 missing
// 1 found
int validRenamePath( BSONObj obj, const char *path ) {
while( const char *p = strchr( path, '.' ) ) {
string left( path, p - path );
BSONElement e = obj.getField( left );
if ( e.eoo() ) {
return 0;
}
if ( e.type() != Object ) {
return -1;
}
obj = e.embeddedObject();
path = p + 1;
}
return !obj.getField( path ).eoo();
}
auto_ptr<ModSetState> ModSet::prepare(const BSONObj &obj) const {
DEBUGUPDATE( "\t start prepare" );
ModSetState * mss = new ModSetState( obj );
// Perform this check first, so that we don't leave a partially modified object on uassert.
for ( ModHolder::const_iterator i = _mods.begin(); i != _mods.end(); ++i ) {
DEBUGUPDATE( "\t\t prepare : " << i->first );
ModState& ms = mss->_mods[i->first];
const Mod& m = i->second;
BSONElement e = obj.getFieldDotted(m.fieldName);
ms.m = &m;
ms.old = e;
if ( m.op == Mod::RENAME_FROM ) {
int source = validRenamePath( obj, m.fieldName );
uassert( 13489, "$rename source field invalid", source != -1 );
if ( source != 1 ) {
ms.dontApply = true;
}
continue;
}
if ( m.op == Mod::RENAME_TO ) {
int source = validRenamePath( obj, m.renameFrom() );
if ( source == 1 ) {
int target = validRenamePath( obj, m.fieldName );
uassert( 13490, "$rename target field invalid", target != -1 );
ms.newVal = obj.getFieldDotted( m.renameFrom() );
mss->amIInPlacePossible( false );
} else {
ms.dontApply = true;
}
continue;
}
if ( e.eoo() ) {
mss->amIInPlacePossible( m.op == Mod::UNSET );
continue;
}
switch( m.op ) {
case Mod::INC:
uassert( 10140 , "Cannot apply $inc modifier to non-number", e.isNumber() || e.eoo() );
if ( mss->amIInPlacePossible( e.isNumber() ) ){
// check more typing info here
if ( m.elt.type() != e.type() ){
// if i'm incrememnting with a double, then the storage has to be a double
mss->amIInPlacePossible( m.elt.type() != NumberDouble );
}
// check for overflow
if ( e.type() == NumberInt && e.numberLong() + m.elt.numberLong() > numeric_limits<int>::max() ){
mss->amIInPlacePossible( false );
}
}
break;
case Mod::SET:
mss->amIInPlacePossible( m.elt.type() == e.type() &&
m.elt.valuesize() == e.valuesize() );
break;
case Mod::PUSH:
case Mod::PUSH_ALL:
uassert( 10141 , "Cannot apply $push/$pushAll modifier to non-array", e.type() == Array || e.eoo() );
mss->amIInPlacePossible( false );
break;
case Mod::PULL:
case Mod::PULL_ALL: {
uassert( 10142 , "Cannot apply $pull/$pullAll modifier to non-array", e.type() == Array || e.eoo() );
BSONObjIterator i( e.embeddedObject() );
while( mss->_inPlacePossible && i.more() ) {
BSONElement arrI = i.next();
if ( m.op == Mod::PULL ) {
mss->amIInPlacePossible( ! m._pullElementMatch( arrI ) );
}
else if ( m.op == Mod::PULL_ALL ) {
BSONObjIterator j( m.elt.embeddedObject() );
while( mss->_inPlacePossible && j.moreWithEOO() ) {
BSONElement arrJ = j.next();
if ( arrJ.eoo() )
break;
mss->amIInPlacePossible( arrI.woCompare( arrJ, false ) );
}
}
}
break;
}
case Mod::POP: {
uassert( 10143 , "Cannot apply $pop modifier to non-array", e.type() == Array || e.eoo() );
mss->amIInPlacePossible( e.embeddedObject().isEmpty() );
break;
}
case Mod::ADDTOSET: {
uassert( 12591 , "Cannot apply $addToSet modifier to non-array", e.type() == Array || e.eoo() );
BSONObjIterator i( e.embeddedObject() );
if ( m.isEach() ){
BSONElementSet toadd;
m.parseEach( toadd );
while( i.more() ) {
BSONElement arrI = i.next();
toadd.erase( arrI );
}
mss->amIInPlacePossible( toadd.size() == 0 );
}
else {
bool found = false;
while( i.more() ) {
BSONElement arrI = i.next();
if ( arrI.woCompare( m.elt , false ) == 0 ){
found = true;
break;
}
}
mss->amIInPlacePossible( found );
}
break;
}
default:
// mods we don't know about shouldn't be done in place
mss->amIInPlacePossible( false );
}
}
DEBUGUPDATE( "\t mss\n" << mss->toString() << "\t--" );
return auto_ptr<ModSetState>( mss );
}
void ModState::appendForOpLog( BSONObjBuilder& b ) const {
if ( dontApply ) {
return;
}
if ( incType ){
DEBUGUPDATE( "\t\t\t\t\t appendForOpLog inc fieldname: " << m->fieldName << " short:" << m->shortFieldName );
BSONObjBuilder bb( b.subobjStart( "$set" ) );
appendIncValue( bb , true );
bb.done();
return;
}
if ( m->op == Mod::RENAME_FROM ) {
DEBUGUPDATE( "\t\t\t\t\t appendForOpLog RENAME_FROM fielName:" << m->fieldName );
BSONObjBuilder bb( b.subobjStart( "$unset" ) );
bb.append( m->fieldName, 1 );
bb.done();
return;
}
if ( m->op == Mod::RENAME_TO ) {
DEBUGUPDATE( "\t\t\t\t\t appendForOpLog RENAME_TO fielName:" << m->fieldName );
BSONObjBuilder bb( b.subobjStart( "$set" ) );
bb.appendAs( newVal, m->fieldName );
return;
}
const char * name = fixedOpName ? fixedOpName : Mod::modNames[op()];
DEBUGUPDATE( "\t\t\t\t\t appendForOpLog name:" << name << " fixed: " << fixed << " fn: " << m->fieldName );
BSONObjBuilder bb( b.subobjStart( name ) );
if ( fixed ) {
bb.appendAs( *fixed , m->fieldName );
} else {
bb.appendAs( m->elt , m->fieldName );
}
bb.done();
}
string ModState::toString() const {
stringstream ss;
if ( fixedOpName )
ss << " fixedOpName: " << fixedOpName;
if ( fixed )
ss << " fixed: " << fixed;
return ss.str();
}
template< class Builder >
void ModState::handleRename( Builder &newObjBuilder, const char *shortFieldName ) {
newObjBuilder.appendAs( newVal , shortFieldName );
BSONObjBuilder b;
b.appendAs( newVal, shortFieldName );
assert( _objData.isEmpty() );
_objData = b.obj();
newVal = _objData.firstElement();
}
void ModSetState::applyModsInPlace( bool isOnDisk ) {
// TODO i think this assert means that we can get rid of the isOnDisk param
// and just use isOwned as the determination
DEV assert( isOnDisk == ! _obj.isOwned() );
for ( ModStateHolder::iterator i = _mods.begin(); i != _mods.end(); ++i ) {
ModState& m = i->second;
if ( m.dontApply ) {
continue;
}
switch ( m.m->op ){
case Mod::UNSET:
case Mod::PULL:
case Mod::PULL_ALL:
case Mod::ADDTOSET:
case Mod::RENAME_FROM:
case Mod::RENAME_TO:
// this should have been handled by prepare
break;
// [dm] the BSONElementManipulator statements below are for replication (correct?)
case Mod::INC:
if ( isOnDisk )
m.m->IncrementMe( m.old );
else
m.m->incrementMe( m.old );
m.fixedOpName = "$set";
m.fixed = &(m.old);
break;
case Mod::SET:
if ( isOnDisk )
BSONElementManipulator( m.old ).ReplaceTypeAndValue( m.m->elt );
else
BSONElementManipulator( m.old ).replaceTypeAndValue( m.m->elt );
break;
default:
uassert( 13478 , "can't apply mod in place - shouldn't have gotten here" , 0 );
}
}
}
void ModSet::extractFields( map< string, BSONElement > &fields, const BSONElement &top, const string &base ) {
if ( top.type() != Object ) {
fields[ base + top.fieldName() ] = top;
return;
}
BSONObjIterator i( top.embeddedObject() );
bool empty = true;
while( i.moreWithEOO() ) {
BSONElement e = i.next();
if ( e.eoo() )
break;
extractFields( fields, e, base + top.fieldName() + "." );
empty = false;
}
if ( empty )
fields[ base + top.fieldName() ] = top;
}
template< class Builder >
void ModSetState::_appendNewFromMods( const string& root , ModState& m , Builder& b , set<string>& onedownseen ){
const char * temp = m.fieldName();
temp += root.size();
const char * dot = strchr( temp , '.' );
if ( dot ){
string nr( m.fieldName() , 0 , 1 + ( dot - m.fieldName() ) );
string nf( temp , 0 , dot - temp );
if ( onedownseen.count( nf ) )
return;
onedownseen.insert( nf );
BSONObjBuilder bb ( b.subobjStart( nf ) );
createNewFromMods( nr , bb , BSONObj() ); // don't infer an array from name
bb.done();
}
else {
appendNewFromMod( m , b );
}
}
template< class Builder >
void ModSetState::createNewFromMods( const string& root , Builder& b , const BSONObj &obj ){
DEBUGUPDATE( "\t\t createNewFromMods root: " << root );
BSONObjIteratorSorted es( obj );
BSONElement e = es.next();
ModStateHolder::iterator m = _mods.lower_bound( root );
StringBuilder buf(root.size() + 2 );
buf << root << (char)255;
ModStateHolder::iterator mend = _mods.lower_bound( buf.str() );
set<string> onedownseen;
while ( e.type() && m != mend ){
string field = root + e.fieldName();
FieldCompareResult cmp = compareDottedFieldNames( m->second.m->fieldName , field );
DEBUGUPDATE( "\t\t\t field:" << field << "\t mod:" << m->second.m->fieldName << "\t cmp:" << cmp << "\t short: " << e.fieldName() );
switch ( cmp ){
case LEFT_SUBFIELD: { // Mod is embeddeed under this element
uassert( 10145 , str::stream() << "LEFT_SUBFIELD only supports Object: " << field << " not: " << e.type() , e.type() == Object || e.type() == Array );
if ( onedownseen.count( e.fieldName() ) == 0 ){
onedownseen.insert( e.fieldName() );
if ( e.type() == Object ) {
BSONObjBuilder bb( b.subobjStart( e.fieldName() ) );
stringstream nr; nr << root << e.fieldName() << ".";
createNewFromMods( nr.str() , bb , e.embeddedObject() );
bb.done();
} else {
BSONArrayBuilder ba( b.subarrayStart( e.fieldName() ) );
stringstream nr; nr << root << e.fieldName() << ".";
createNewFromMods( nr.str() , ba , e.embeddedObject() );
ba.done();
}
// inc both as we handled both
e = es.next();
m++;
}
else {
// this is a very weird case
// have seen it in production, but can't reproduce
// this assert prevents an inf. loop
// but likely isn't the correct solution
assert(0);
}
continue;
}
case LEFT_BEFORE: // Mod on a field that doesn't exist
DEBUGUPDATE( "\t\t\t\t creating new field for: " << m->second.m->fieldName );
_appendNewFromMods( root , m->second , b , onedownseen );
m++;
continue;
case SAME:
DEBUGUPDATE( "\t\t\t\t applying mod on: " << m->second.m->fieldName );
m->second.apply( b , e );
e = es.next();
m++;
continue;
case RIGHT_BEFORE: // field that doesn't have a MOD
DEBUGUPDATE( "\t\t\t\t just copying" );
b.append( e ); // if array, ignore field name
e = es.next();
continue;
case RIGHT_SUBFIELD:
massert( 10399 , "ModSet::createNewFromMods - RIGHT_SUBFIELD should be impossible" , 0 );
break;
default:
massert( 10400 , "unhandled case" , 0 );
}
}
// finished looping the mods, just adding the rest of the elements
while ( e.type() ){
DEBUGUPDATE( "\t\t\t copying: " << e.fieldName() );
b.append( e ); // if array, ignore field name
e = es.next();
}
// do mods that don't have fields already
for ( ; m != mend; m++ ){
DEBUGUPDATE( "\t\t\t\t appending from mod at end: " << m->second.m->fieldName );
_appendNewFromMods( root , m->second , b , onedownseen );
}
}
BSONObj ModSetState::createNewFromMods() {
BSONObjBuilder b( (int)(_obj.objsize() * 1.1) );
createNewFromMods( "" , b , _obj );
return _newFromMods = b.obj();
}
string ModSetState::toString() const {
stringstream ss;
for ( ModStateHolder::const_iterator i=_mods.begin(); i!=_mods.end(); ++i ){
ss << "\t\t" << i->first << "\t" << i->second.toString() << "\n";
}
return ss.str();
}
BSONObj ModSet::createNewFromQuery( const BSONObj& query ){
BSONObj newObj;
{
BSONObjBuilder bb;
EmbeddedBuilder eb( &bb );
BSONObjIteratorSorted i( query );
while ( i.more() ){
BSONElement e = i.next();
if ( e.fieldName()[0] == '$' ) // for $atomic and anything else we add
continue;
if ( e.type() == Object && e.embeddedObject().firstElement().fieldName()[0] == '$' ){
// this means this is a $gt type filter, so don't make part of the new object
continue;
}
eb.appendAs( e , e.fieldName() );
}
eb.done();
newObj = bb.obj();
}
auto_ptr<ModSetState> mss = prepare( newObj );
if ( mss->canApplyInPlace() )
mss->applyModsInPlace( false );
else
newObj = mss->createNewFromMods();
return newObj;
}
/* get special operations like $inc
{ $inc: { a:1, b:1 } }
{ $set: { a:77 } }
{ $push: { a:55 } }
{ $pushAll: { a:[77,88] } }
{ $pull: { a:66 } }
{ $pullAll : { a:[99,1010] } }
NOTE: MODIFIES source from object!
*/
ModSet::ModSet(
const BSONObj &from ,
const set<string>& idxKeys,
const set<string> *backgroundKeys)
: _isIndexed(0) , _hasDynamicArray( false ) {
BSONObjIterator it(from);
while ( it.more() ) {
BSONElement e = it.next();
const char *fn = e.fieldName();
uassert( 10147 , "Invalid modifier specified" + string( fn ), e.type() == Object );
BSONObj j = e.embeddedObject();
DEBUGUPDATE( "\t" << j );
BSONObjIterator jt(j);
Mod::Op op = opFromStr( fn );
while ( jt.more() ) {
BSONElement f = jt.next(); // x:44
const char * fieldName = f.fieldName();
uassert( 10148 , "Mod on _id not allowed", strcmp( fieldName, "_id" ) != 0 );
uassert( 10149 , "Invalid mod field name, may not end in a period", fieldName[ strlen( fieldName ) - 1 ] != '.' );
uassert( 10150 , "Field name duplication not allowed with modifiers", ! haveModForField( fieldName ) );
uassert( 10151 , "have conflicting mods in update" , ! haveConflictingMod( fieldName ) );
uassert( 10152 , "Modifier $inc allowed for numbers only", f.isNumber() || op != Mod::INC );
uassert( 10153 , "Modifier $pushAll/pullAll allowed for arrays only", f.type() == Array || ( op != Mod::PUSH_ALL && op != Mod::PULL_ALL ) );
if ( op == Mod::RENAME_TO ) {
uassert( 13494, "$rename target must be a string", f.type() == String );
const char *target = f.valuestr();
uassert( 13495, "$rename source must differ from target", strcmp( fieldName, target ) != 0 );
uassert( 13496, "invalid mod field name, source may not be empty", fieldName[0] );
uassert( 13479, "invalid mod field name, target may not be empty", target[0] );
uassert( 13480, "invalid mod field name, source may not begin or end in period", fieldName[0] != '.' && fieldName[ strlen( fieldName ) - 1 ] != '.' );
uassert( 13481, "invalid mod field name, target may not begin or end in period", target[0] != '.' && target[ strlen( target ) - 1 ] != '.' );
uassert( 13482, "$rename affecting _id not allowed", !( fieldName[0] == '_' && fieldName[1] == 'i' && fieldName[2] == 'd' && ( !fieldName[3] || fieldName[3] == '.' ) ) );
uassert( 13483, "$rename affecting _id not allowed", !( target[0] == '_' && target[1] == 'i' && target[2] == 'd' && ( !target[3] || target[3] == '.' ) ) );
uassert( 13484, "field name duplication not allowed with $rename target", !haveModForField( target ) );
uassert( 13485, "conflicting mods not allowed with $rename target", !haveConflictingMod( target ) );
uassert( 13486, "$rename target may not be a parent of source", !( strncmp( fieldName, target, strlen( target ) ) == 0 && fieldName[ strlen( target ) ] == '.' ) );
uassert( 13487, "$rename source may not be dynamic array", strstr( fieldName , ".$" ) == 0 );
uassert( 13488, "$rename target may not be dynamic array", strstr( target , ".$" ) == 0 );
Mod from;
from.init( Mod::RENAME_FROM, f );
from.setFieldName( fieldName );
updateIsIndexed( from, idxKeys, backgroundKeys );
_mods[ from.fieldName ] = from;
Mod to;
to.init( Mod::RENAME_TO, f );
to.setFieldName( target );
updateIsIndexed( to, idxKeys, backgroundKeys );
_mods[ to.fieldName ] = to;
DEBUGUPDATE( "\t\t " << fieldName << "\t" << from.fieldName << "\t" << to.fieldName );
continue;
}
_hasDynamicArray = _hasDynamicArray || strstr( fieldName , ".$" ) > 0;
Mod m;
m.init( op , f );
m.setFieldName( f.fieldName() );
updateIsIndexed( m, idxKeys, backgroundKeys );
_mods[m.fieldName] = m;
DEBUGUPDATE( "\t\t " << fieldName << "\t" << m.fieldName << "\t" << _hasDynamicArray );
}
}
}
ModSet * ModSet::fixDynamicArray( const char * elemMatchKey ) const {
ModSet * n = new ModSet();
n->_isIndexed = _isIndexed;
n->_hasDynamicArray = _hasDynamicArray;
for ( ModHolder::const_iterator i=_mods.begin(); i!=_mods.end(); i++ ){
string s = i->first;
size_t idx = s.find( ".$" );
if ( idx == string::npos ){
n->_mods[s] = i->second;
continue;
}
StringBuilder buf(s.size()+strlen(elemMatchKey));
buf << s.substr(0,idx+1) << elemMatchKey << s.substr(idx+2);
string fixed = buf.str();
DEBUGUPDATE( "fixed dynamic: " << s << " -->> " << fixed );
n->_mods[fixed] = i->second;
ModHolder::iterator temp = n->_mods.find( fixed );
temp->second.setFieldName( temp->first.c_str() );
}
return n;
}
void checkNoMods( BSONObj o ) {
BSONObjIterator i( o );
while( i.moreWithEOO() ) {
BSONElement e = i.next();
if ( e.eoo() )
break;
uassert( 10154 , "Modifiers and non-modifiers cannot be mixed", e.fieldName()[ 0 ] != '$' );
}
}
class UpdateOp : public MultiCursor::CursorOp {
public:
UpdateOp( bool hasPositionalField ) : _nscanned(), _hasPositionalField( hasPositionalField ){}
virtual void _init() {
_c = qp().newCursor();
if ( ! _c->ok() ) {
setComplete();
}
}
virtual bool prepareToYield() {
if ( ! _cc ) {
_cc.reset( new ClientCursor( QueryOption_NoCursorTimeout , _c , qp().ns() ) );
}
return _cc->prepareToYield( _yieldData );
}
virtual void recoverFromYield() {
if ( !ClientCursor::recoverFromYield( _yieldData ) ) {
_c.reset();
_cc.reset();
massert( 13339, "cursor dropped during update", false );
}
}
virtual long long nscanned() {
assert( _c.get() );
return _c->nscanned();
}
virtual void next() {
if ( ! _c->ok() ) {
setComplete();
return;
}
_nscanned++;
if ( matcher()->matches(_c->currKey(), _c->currLoc(), &_details ) ) {
setComplete();
return;
}
_c->advance();
}
virtual bool mayRecordPlan() const { return false; }
virtual QueryOp *_createChild() const {
return new UpdateOp( _hasPositionalField );
}
// already scanned to the first match, so return _c
virtual shared_ptr< Cursor > newCursor() const { return _c; }
virtual bool alwaysUseRecord() const { return _hasPositionalField; }
private:
shared_ptr< Cursor > _c;
long long _nscanned;
bool _hasPositionalField;
MatchDetails _details;
ClientCursor::CleanupPointer _cc;
ClientCursor::YieldData _yieldData;
};
static void checkTooLarge(const BSONObj& newObj) {
uassert( 12522 , "$ operator made object too large" , newObj.objsize() <= BSONObjMaxUserSize );
}
/* note: this is only (as-is) called for
- not multi
- not mods is indexed
- not upsert
*/
static UpdateResult _updateById(bool isOperatorUpdate, int idIdxNo, ModSet *mods, int profile, NamespaceDetails *d,
NamespaceDetailsTransient *nsdt,
bool god, const char *ns,
const BSONObj& updateobj, BSONObj patternOrig, bool logop, OpDebug& debug)
{
DiskLoc loc;
{
IndexDetails& i = d->idx(idIdxNo);
BSONObj key = i.getKeyFromQuery( patternOrig );
loc = i.head.btree()->findSingle(i, i.head, key);
if( loc.isNull() ) {
// no upsert support in _updateById yet, so we are done.
return UpdateResult(0, 0, 0);
}
}
Record *r = loc.rec();
/* look for $inc etc. note as listed here, all fields to inc must be this type, you can't set some
regular ones at the moment. */
if ( isOperatorUpdate ) {
const BSONObj& onDisk = loc.obj();
auto_ptr<ModSetState> mss = mods->prepare( onDisk );
if( mss->canApplyInPlace() ) {
mss->applyModsInPlace(true);
DEBUGUPDATE( "\t\t\t updateById doing in place update" );
/*if ( profile )
ss << " fastmod "; */
}
else {
BSONObj newObj = mss->createNewFromMods();
checkTooLarge(newObj);
assert(nsdt);
DiskLoc newLoc = theDataFileMgr.updateRecord(ns, d, nsdt, r, loc , newObj.objdata(), newObj.objsize(), debug);
}
if ( logop ) {
DEV assert( mods->size() );
BSONObj pattern = patternOrig;
if ( mss->haveArrayDepMod() ) {
BSONObjBuilder patternBuilder;
patternBuilder.appendElements( pattern );
mss->appendSizeSpecForArrayDepMods( patternBuilder );
pattern = patternBuilder.obj();
}
if( mss->needOpLogRewrite() ) {
DEBUGUPDATE( "\t rewrite update: " << mss->getOpLogRewrite() );
logOp("u", ns, mss->getOpLogRewrite() , &pattern );
}
else {
logOp("u", ns, updateobj, &pattern );
}
}
return UpdateResult( 1 , 1 , 1);
} // end $operator update
// regular update
BSONElementManipulator::lookForTimestamps( updateobj );
checkNoMods( updateobj );
assert(nsdt);
theDataFileMgr.updateRecord(ns, d, nsdt, r, loc , updateobj.objdata(), updateobj.objsize(), debug );
if ( logop ) {
logOp("u", ns, updateobj, &patternOrig );
}
return UpdateResult( 1 , 0 , 1 );
}
UpdateResult _updateObjects(bool god, const char *ns, const BSONObj& updateobj, BSONObj patternOrig, bool upsert, bool multi, bool logop , OpDebug& debug, RemoveSaver* rs ) {
DEBUGUPDATE( "update: " << ns << " update: " << updateobj << " query: " << patternOrig << " upsert: " << upsert << " multi: " << multi );
Client& client = cc();
int profile = client.database()->profile;
StringBuilder& ss = debug.str;
if ( logLevel > 2 )
ss << " update: " << updateobj.toString();
/* idea with these here it to make them loop invariant for multi updates, and thus be a bit faster for that case */
/* NOTE: when yield() is added herein, these must be refreshed after each call to yield! */
NamespaceDetails *d = nsdetails(ns); // can be null if an upsert...
NamespaceDetailsTransient *nsdt = &NamespaceDetailsTransient::get_w(ns);
/* end note */
auto_ptr<ModSet> mods;
bool isOperatorUpdate = updateobj.firstElement().fieldName()[0] == '$';
int modsIsIndexed = false; // really the # of indexes
if ( isOperatorUpdate ){
if( d && d->backgroundIndexBuildInProgress ) {
set<string> bgKeys;
d->backgroundIdx().keyPattern().getFieldNames(bgKeys);
mods.reset( new ModSet(updateobj, nsdt->indexKeys(), &bgKeys) );
}
else {
mods.reset( new ModSet(updateobj, nsdt->indexKeys()) );
}
modsIsIndexed = mods->isIndexed();
}
if( !upsert && !multi && isSimpleIdQuery(patternOrig) && d && !modsIsIndexed ) {
int idxNo = d->findIdIndex();
if( idxNo >= 0 ) {
ss << " byid ";
return _updateById(isOperatorUpdate, idxNo, mods.get(), profile, d, nsdt, god, ns, updateobj, patternOrig, logop, debug);
}
}
set<DiskLoc> seenObjects;
int numModded = 0;
long long nscanned = 0;
MatchDetails details;
shared_ptr< MultiCursor::CursorOp > opPtr( new UpdateOp( mods.get() && mods->hasDynamicArray() ) );
shared_ptr< MultiCursor > c( new MultiCursor( ns, patternOrig, BSONObj(), opPtr, true ) );
auto_ptr<ClientCursor> cc;
while ( c->ok() ) {
nscanned++;
bool atomic = c->matcher()->docMatcher().atomic();
// May have already matched in UpdateOp, but do again to get details set correctly
if ( ! c->matcher()->matches( c->currKey(), c->currLoc(), &details ) ){
c->advance();
if ( nscanned % 256 == 0 && ! atomic ){
if ( cc.get() == 0 ) {
shared_ptr< Cursor > cPtr = c;
cc.reset( new ClientCursor( QueryOption_NoCursorTimeout , cPtr , ns ) );
}
if ( ! cc->yield() ){
cc.release();
// TODO should we assert or something?
break;
}
if ( !c->ok() ) {
break;
}
}
continue;
}
Record *r = c->_current();
DiskLoc loc = c->currLoc();
// TODO Maybe this is unnecessary since we have seenObjects
if ( c->getsetdup( loc ) ){
c->advance();
continue;
}
BSONObj js(r);
BSONObj pattern = patternOrig;
if ( logop ) {
BSONObjBuilder idPattern;
BSONElement id;
// NOTE: If the matching object lacks an id, we'll log
// with the original pattern. This isn't replay-safe.
// It might make sense to suppress the log instead
// if there's no id.
if ( js.getObjectID( id ) ) {
idPattern.append( id );
pattern = idPattern.obj();
}
else {
uassert( 10157 , "multi-update requires all modified objects to have an _id" , ! multi );
}
}
if ( profile )
ss << " nscanned:" << nscanned;
/* look for $inc etc. note as listed here, all fields to inc must be this type, you can't set some
regular ones at the moment. */
if ( isOperatorUpdate ) {
if ( multi ){
c->advance(); // go to next record in case this one moves
if ( seenObjects.count( loc ) )
continue;
}
const BSONObj& onDisk = loc.obj();
ModSet * useMods = mods.get();
bool forceRewrite = false;
auto_ptr<ModSet> mymodset;
if ( details.elemMatchKey && mods->hasDynamicArray() ){
useMods = mods->fixDynamicArray( details.elemMatchKey );
mymodset.reset( useMods );
forceRewrite = true;
}
auto_ptr<ModSetState> mss = useMods->prepare( onDisk );
bool indexHack = multi && ( modsIsIndexed || ! mss->canApplyInPlace() );
if ( indexHack ){
if ( cc.get() )
cc->updateLocation();
else
c->noteLocation();
}
if ( modsIsIndexed <= 0 && mss->canApplyInPlace() ){
mss->applyModsInPlace( true );// const_cast<BSONObj&>(onDisk) );
DEBUGUPDATE( "\t\t\t doing in place update" );
if ( profile )
ss << " fastmod ";
if ( modsIsIndexed ){
seenObjects.insert( loc );
}
}
else {
if ( rs )
rs->goingToDelete( onDisk );
BSONObj newObj = mss->createNewFromMods();
checkTooLarge(newObj);
DiskLoc newLoc = theDataFileMgr.updateRecord(ns, d, nsdt, r, loc , newObj.objdata(), newObj.objsize(), debug);
if ( newLoc != loc || modsIsIndexed ) {
// object moved, need to make sure we don' get again
seenObjects.insert( newLoc );
}
}
if ( logop ) {
DEV assert( mods->size() );
if ( mss->haveArrayDepMod() ) {
BSONObjBuilder patternBuilder;
patternBuilder.appendElements( pattern );
mss->appendSizeSpecForArrayDepMods( patternBuilder );
pattern = patternBuilder.obj();
}
if ( forceRewrite || mss->needOpLogRewrite() ){
DEBUGUPDATE( "\t rewrite update: " << mss->getOpLogRewrite() );
logOp("u", ns, mss->getOpLogRewrite() , &pattern );
}
else {
logOp("u", ns, updateobj, &pattern );
}
}
numModded++;
if ( ! multi )
return UpdateResult( 1 , 1 , numModded );
if ( indexHack )
c->checkLocation();
if ( nscanned % 64 == 0 && ! atomic ){
if ( cc.get() == 0 ) {
shared_ptr< Cursor > cPtr = c;
cc.reset( new ClientCursor( QueryOption_NoCursorTimeout , cPtr , ns ) );
}
if ( ! cc->yield() ){
cc.release();
break;
}
if ( !c->ok() ) {
break;
}
}
continue;
}
uassert( 10158 , "multi update only works with $ operators" , ! multi );
BSONElementManipulator::lookForTimestamps( updateobj );
checkNoMods( updateobj );
theDataFileMgr.updateRecord(ns, d, nsdt, r, loc , updateobj.objdata(), updateobj.objsize(), debug, god);
if ( logop ) {
DEV if( god ) log() << "REALLY??" << endl; // god doesn't get logged, this would be bad.
logOp("u", ns, updateobj, &pattern );
}
return UpdateResult( 1 , 0 , 1 );
}
if ( numModded )
return UpdateResult( 1 , 1 , numModded );
if ( profile )
ss << " nscanned:" << nscanned;
if ( upsert ) {
if ( updateobj.firstElement().fieldName()[0] == '$' ) {
/* upsert of an $inc. build a default */
BSONObj newObj = mods->createNewFromQuery( patternOrig );
if ( profile )
ss << " fastmodinsert ";
theDataFileMgr.insertWithObjMod(ns, newObj, god);
if ( logop )
logOp( "i", ns, newObj );
return UpdateResult( 0 , 1 , 1 , newObj );
}
uassert( 10159 , "multi update only works with $ operators" , ! multi );
checkNoMods( updateobj );
if ( profile )
ss << " upsert ";
BSONObj no = updateobj;
theDataFileMgr.insertWithObjMod(ns, no, god);
if ( logop )
logOp( "i", ns, no );
return UpdateResult( 0 , 0 , 1 , no );
}
return UpdateResult( 0 , 0 , 0 );
}
UpdateResult updateObjects(const char *ns, const BSONObj& updateobj, BSONObj patternOrig, bool upsert, bool multi, bool logop , OpDebug& debug ) {
uassert( 10155 , "cannot update reserved $ collection", strchr(ns, '$') == 0 );
if ( strstr(ns, ".system.") ) {
/* dm: it's very important that system.indexes is never updated as IndexDetails has pointers into it */
uassert( 10156 , "cannot update system collection", legalClientSystemNS( ns , true ) );
}
return _updateObjects(false, ns, updateobj, patternOrig, upsert, multi, logop, debug);
}
}
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