Change/Update Field name in the NiFi Schema Text property Across various parallel flows - schema

Question

I have few identical parallel flows(as shown in screenshot). I have convertRecord in each of the identical flows and in the Record Reader I have used "Schema Text Field Property" as access strategy and specified the "Schema text". For Example:
{
"type": "record",
"name": "AVLRecord0",
"fields" : [
{"name": "TimeOfDay", "type": "string", "logicalType":"timestamp-millis"},
{"name":"Field1", "type": "double"},
{"name":"Field2", "type": "double"},
{"name":"Field3", "type": "double"},
{"name": "Filename", "type": "string"}
]
}
Lets say the above schema I have used across various parallel flows ConvertRecord, and now I want to update one field name from Field to Field_Name so is there any way I can do it in one go across all the convert record Schema Text?
If I want to change/update one of the Field in the schema Text do I have to change/Update the field name in each processor manually? Or there is a global way that will change the field name across all the parallel flow I have?
Is there Any way that I can update the Schema Text across various processors In one go?
Any help is much appreciated! Thanks

Answer 1

As you are using Schema Text Field Property so you need to change in all ConvertRecord processor manually.
Try with this approach:
In ConvertRecord processor use Schema Access Strategy as
Use Schema Name Property
Then set up AvroSchemaRegistry and define your schema by adding new property
I have added sch as schema.name and defined the avro schema.
After GetFile Processor use UpdateAttribute processor and add schema.name attribute(for ex: with value sch) to the flowfile.
Now in reader controller service use the Schema Access strategy as Use Schema Name Property and Schema Registry asAvroSchemaRegistry` that has already setup.
By following this way we are not defining schema on all ConvertRecord processors instead we are referring to same schema that defined in AvroSchemaRegistry in case if you want to change one field name it is easy to go into Registry and change the value.
Flow:
1.GetFile
2.UpdateAttribute //add schema.name attribute
3.ConvertRecord //define/use AvroSchemaRegistry and access strategy as schemaname property
..other processors
Refer to this link for more details regards to defining/using AvroSchemaRegistry.