Content-based filtering using ESQL
IBM® MQ supports
message selection based on
Root.MQMD and message
properties; IBM Integration Bus provides extra
Content based filters in IBM Integration Bus extend IBM MQ message selectors to allow the use of ESQL expressions to filter on the entire message.
- Correlation names
- In content based filters, the message can be accessed
Propertiescorrelation names.Any other correlation name is interpreted as a IBM MQ message property, apart from the following list of excluded reserved names:
Any other top level identifier is assumed to be a IBM MQ message property, and is accepted.
- The content based filtering engine does not update the message
tree. It accesses the message tree as read-only. Any statements
that attempt to modify the tree are rejected.
By supporting ESQL, content based filtering in IBM Integration Bus supports fully-qualified Namespaces, as documented in ESQL reference.
- ESQL expressions
- Content based filtering accepts any ESQL expression, with the exclusion of database access, that returns a Boolean value.