Developing Apama Applications > Developing Apama Applications in EPL > Making Application Data Available to Clients > Looking Up Field Positions > DataViewFieldLookup
DataViewFieldLookup
Syntax
event DataViewFieldLookup {
   string msgId;
   string dvName;
   dictionary <string, integer> fields;
   dictionary<string, string> extraParams;
}
These events are responses to DataViewGetFieldLookup events. They contain a dictionary that supports lookup of the field position for a given field name.
Syntax description
msgId
Optional field that contains the ID, if it was specified, of the message to which this is a response.
dvName
Unique name of the DataView definition specified in the event to which this is a response.
fields
Dictionary of field-name/field-position pairs. A field’s position is its index in the fieldNames sequence that is specified in the associated DataView definition.
extraParams
Optional field that future implementations may use.
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