neo4j/neo4j — pull request #1071 by tbaum (2013-08-13 21:39:14+00:00)
Title: '.. SET n += {param}'

extend cypher-SET syntax to allow merge of node/relationship-properties.
this will allow to modify only properties from the given parameter/map, in contrast replacing all properties using the 'SET n = {param}' operation

this operation is useful for general crud-operations which tend not to overwrite a complete node in most cases