Bulk更新mongodb的脚本

摘要: bulk批处理mongodb,比普通的js脚本来的更快一些。 官方网址:https://docs.mongodb.com/manual/reference/method/Bulk/ bulk支持的方法: bulk插入示例: bulk更新示例: 打印字符串: 移除: 替换: 插入并更新: 获得历史: 阅读全文

bulk批处理mongodb,比普通的js脚本来的更快一些。

官方网址:https://docs.mongodb.com/manual/reference/method/Bulk/

bulk支持的方法:
Name Description
Bulk.insert()
Adds an insert operation to a list of operations.
Bulk.find()
Specifies the query condition for an update or a remove operation.
Bulk.find.removeOne()
Adds a single document remove operation to a list of operations.
Bulk.find.remove()
Adds a multiple document remove operation to a list of operations.
Bulk.find.replaceOne()
Adds a single document replacement operation to a list of operations.
Bulk.find.updateOne()
Adds a single document update operation to a list of operations.
Bulk.find.update()
Adds a

multi
 update operation to a list of operations.
Bulk.find.upsert()
Specifies

upsert: true
 for an update operation.
Bulk.execute()
Executes a list of operations in bulk.
Bulk.getOperations()
Returns an array of write operations executed in the

Bulk()
 operations object.
Bulk.tojson()
Returns a JSON document that contains the number of operations and batches in the

Bulk()
 operations object.
Bulk.toString()
Returns the 
Bulk.tojson()
 results as a string.

bulk插入示例:

1
2
3
4
5
	var bulk = db.items.initializeUnorderedBulkOp();
bulk.insert( { item: "abc123", defaultQty: 100, status: "A", points: 100 } );
bulk.insert( { item: "ijk123", defaultQty: 200, status: "A", points: 200 } );
bulk.insert( { item: "mop123", defaultQty: 0, status: "P", points: 0 } );
bulk.execute();

bulk更新示例:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
	/**
* 批量更新数据库对象
* 1. 按条件批量更新
* 2. 无条件批量更新
*/

/** 1. 按条件批量更新 **/
// step 1: get key-value
var idArray = [];
var valueArray = [];
var idx = -1;
db.conch_ChargeSchedule.find({'predictChargeValue':{$exists:false}}).forEach(function(obj){
idx++;
idArray[idx]=obj._id;
valueArray[idx]=obj.planValue;
});
// step 2: update
var bulk = db.conch_ChargeSchedule.initializeUnorderedBulkOp();
for(var i=0; i<idArray.length; i++){
bulk.find( { _id: idArray[i] } ).update({ $set: { predictChargeValue: valueArray[i] } });
}
bulk.execute();

/** 2. 无条件批量更新 **/
var bulk = db.conch_ChargeSchedule.initializeUnorderedBulkOp();
bulk.find({}).update({ $set: { isPlanValueUpdatable: true, isStatusUpdatable:true, isStartDateUpdatable:true } });
bulk.execute();
1
2
3
	var bulk = db.items.initializeUnorderedBulkOp();
bulk.find( { status: "D" } ).updateOne( { $set: { status: "I", points: "0" } } );
bulk.execute();

打印字符串:

1
2
3
4
5
	var bulk = db.items.initializeOrderedBulkOp();
bulk.insert( { item: "abc123", status: "A", defaultQty: 500, points: 5 } );
bulk.insert( { item: "ijk123", status: "A", defaultQty: 100, points: 10 } );
bulk.find( { status: "D" } ).removeOne();
bulk.toString();

移除:

1
2
3
	var bulk = db.items.initializeUnorderedBulkOp();
bulk.find( { status: "D" } ).remove();
bulk.execute();

替换:

1
2
3
	var bulk = db.items.initializeUnorderedBulkOp();
bulk.find( { item: "abc123" } ).replaceOne( { item: "abc123", status: "P", points: 100 } );
bulk.execute();

插入并更新:

1
2
3
4
5
6
7
8
9
	var bulk = db.items.initializeUnorderedBulkOp();
bulk.find( { status: "P", item: null } ).upsert().updateOne(
{
$setOnInsert: { defaultQty: 0, inStock: true },
$currentDate: { lastModified: true },
$set: { points: "0" }
}
);
bulk.execute();

获得历史:

1
2
3
4
5
6
7
8
	var bulk = db.items.initializeUnorderedBulkOp();

for (var i = 1; i <= 1500; i++) {
bulk.insert( { x: i } );
}

bulk.execute();
bulk.getOperations();// 获得操作历史

普通的js脚本更新mongodb库,为单线程阻塞方式,有数据大小限制,数据大了容易断掉。bulk的则不会出现这种状况,效率max