title	summary
Filter Configuration	Learn how to configure Filters.

Filter Configuration

Filter defines the column mutation operations on the Input message. It is configured in the array and the system executes each Filter in order.

Currently, DRC supports the following Filter plugins:

`reject` configuration

The reject Filter rejects specific Input messages. Then these messages will not be the next Filter or Output.

[[filters]]
type = "reject"
match-schema = "test"
match-table = "test_table_*"

For the above configuration, all the messages with schema set to test and table set to test_table_* are filtered.

[[filters]]
type = "reject"
match-schema = "test"
match-dml-op = "delete"

For the above configuration, all the delete DML message with schema set to test are rejected.

The delete-dml-column Filter deletes specific columns in the Input message.

[[filters]]
type = "delete-dml-column"
match-schema = "test"
match-table = "test_table"
columns = ["e", "f"]

For the above configuration, "e" and "f" columns in all the DML messages with schema set to test and table set to test_table are deleted.

The rename-dml-column Filter renames specific columns in the source DML messages.

[[filters]]
type = "rename-dml-column"
match-schema = "test"
match-table = "test_table"
from = ["a", "b"]
to = ["c", "d"]

For the above configuration, the "a" column is renamed to "c" and the "b" column is renamed to "d".