for my test file I have 10 columns but I want the work to be done independently of this file. For example, I want to use getfile-> infeAvroSchema-> Create the table in Postgresl and then use PutdatabaseRecod. Once I have my schema generated I do not know what exactly to use to create the table.
There is no standard processor capable to address your requirement. You would have to build a custom processor to generate the DDL or use ExecuteSQL or ExecuteScript processor. Anyhow, keep in mind that avro data types are not an exact match with Postgresql data types to not mention that your avro may be hierarchical. For that situation I suggest you to follow the steps: ConvertAvroToJson -> FlattenJson -> ConvertJsonToSQL -> ExecuteSQL. This is just one approach, you can do it in several ways including using Record processors.