upsert

Here's my situation. I have a table with a bunch of URLs and crawl dates associated with them. When my program processes a URL, I want to INSERT a new row with a crawl date. If the URL already exists, I want to update the crawl date to the current datetime. With MS SQL or Oracle I'd probably use a MERGE command for this. With mySQL I'd probably use the ON DUPLICATE KEY UPDATE syntax. I could do multiple queries in my program, which may or may not be thread safe. I could write a SQL function which has various IF...ELSE logic. However, for the sake of trying out Postgres features I've never used

I'm trying to get MongoDB to upsert multiple records with the following query, ultimately using MongoMapper and the Mongo ruby driver. db.foo.update({event_id: { $in: [1,2]}}, {$inc: {visit:1}}, true, true) This works fine if all the records exist, but does not create new records for records that do not exist. The following command has the desired effect from the shell, but is probably not ideal from the ruby driver. [1,2].forEach(function(id) {db.foo.update({event_id: id}, {$inc: {visit:1}}, true, true) }); I could loop through each id I want to insert from within ruby, but that would

This exception: Exception in thread "Thread-1" java.lang.IllegalArgumentException: Invalid BSON field name id at org.bson.AbstractBsonWriter.writeName(AbstractBsonWriter.java:516) at org.bson.codecs.DocumentCodec.writeMap(DocumentCodec.java:188) at org.bson.codecs.DocumentCodec.encode(DocumentCodec.java:131) at org.bson.codecs.DocumentCodec.encode(DocumentCodec.java:45) at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:63) at org.bson.codecs.BsonDocumentWrapperCodec.encode(BsonDocumentWrapperCodec.java:29) at com.mongodb.connection.UpdateCommandMessage

I'm using Code-First DBContext-based EF5 setup. In DbMigrationsConfiguration.Seed I'm trying to fill DB with default dummy data. To accomplish this task, I use DbSet.AddOrUpdate method. The simplest code to illustrate my aim: j = 0; var cities = new[] { "Berlin", "Vienna", "London", "Bristol", "Rome", "Stockholm", "Oslo", "Helsinki", "Amsterdam", "Dublin" }; var cityObjects = new City[cities.Length]; foreach (string c in cities) { int id = r.NextDouble() > 0.5 ? 0 : 1; var city = new City { Id = j, Name = c, Slug = c.ToLowerInvariant(), Region = regions[id], RegionId = regions[id].Id, Reviewed

I am writing an SSIS package to run on SQL Server 2008. How do you do an UPSERT in SSIS? IF KEY NOT EXISTS INSERT ELSE IF DATA CHANGED UPDATE ENDIF ENDIF See SQL Server 2008 - Using Merge From SSIS . I've implemented something like this, and it was very easy. Just using the BOL page Inserting, Updating, and Deleting Data using MERGE was enough to get me going. Arnkrishn I would suggest you to have a look at Mat Stephen's weblog on SQL Server's upsert. SQL 2005 - UPSERT: In nature but not by name; but at last! Raj The basic Data Manipulation Language (DML) commands that have been in use over

How soon will the upsert command be implemented in Meteor? And, what is the best way to do the same thing in the mean time? Something like this is what I'm doing at the moment: if typeof ( item = Items.findOne({title:'Foo'}) ) == 'undefined' item = Items.insert({title:'Foo'}) else Items.update(item._id, {$set: {title:'Foo'}}) # do something with item alanning How soon will the upsert command be implemented in Meteor? UPDATE: @Thomas4019 points out that upsert is now supported: v0.6.6 "Add upsert support. Collection.update now supports the {upsert: true} option. Additionally, add a Collection

I am trying to use upsert in MongoDB to update a single field in a document if found OR insert a whole new document with lots of fields. The problem is that it appears to me that MongoDB either replaces every field or inserts a subset of fields in its upsert operation, i.e. it can not insert more fields than it actually wants to update. What I want to do is the following: I query for a single unique value If a document already exists, only a timestamp value (lets call it 'lastseen') is updated to a new value If a document does not exists, I will add it with a long list of different key/value