Filter
The filter stage processes data. It convert the data that has flowed from the sensor.
Two or more actions to process data can be selected in the filter stage. Moreover, in the case of a simple pipeline, such as: the data that has been transferred is transferred to another system as it is, even if no action is also irrelevant.
There is an action of processing type that converts the character string in the filter action, and calculates the value, there is an action of condition type when the value does not meet the conditions that they can terminate processing or delete records.
And ，the filter action can convert a value as it is or substituted it for another field and created filter actionrecord variable , user variable.
Execution of filter action
The action selected in the filter stage is sequentially executed from up to down. When the input is a record and there are filter action "A" and filter action "B", after "A" is executed for all the records, "B" is executed for the result of "A".
Execution of filter processing when there is record in data
Executing filter processing with two or more records, conversion result will be executed according to the number of conversion result.
For example, when you want to convert a field with a record to a record variable, for all record datas, conversion results will be substituted into record variables.
If you want to convert the record, even it is a data with two or more records, when convert it into parameter type data of user variable, only the first record value is substituted as a conversion object.
If you want to convert a data record of parameter type into a record variable or a record field, substitute the same values into all record variables, record fields.