问题
I am designing a work which takes a data from on database in MySQl to another database(MySQL) using ExecuteSQL processor followed up with ConvertAvroToJson then ConvertJsonToSQL then PutSQL as shown in below flow chart
ConvertJSONToSQL returning the empty values like below
INSERT INTO source_count (field1, field2, field3, field4, field5, field6, field7, field8, field9, field10, field11, field12) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
The processor configuration is
what can be wrong in this workflow?
回答1:
Besides the answer given in the comments (to use the sql relationship with ConvertJSONToSQL), then if you have at least NiFi 1.2.0, you can replace everything after ExecuteSQL with PutDatabaseRecord. It lets you configure a reader (you would choose an AvroReader that uses the Embedded Schema) and set the operation type to INSERT, and it will handle the SQL generation and execution for you.
来源：https://stackoverflow.com/questions/47693683/covertjsontosql-returning-empty-values-in-nifi