KAFKA JDBC Source connector adds the default schema - jdbc

Question

I use the KAFKA JDBC Source connector to read from the database ClickHouse (driver - clickhouse-jdbc-0.2.4.jar) with incrementing mod.
Settings:
batch.max.rows = 100
catalog.pattern = null
connection.attempts = 3
connection.backoff.ms = 10000
connection.password = [hidden]
connection.url = jdbc:clickhouse://<ip>:8123/<schema>
connection.user = user
db.timezone =
dialect.name =
incrementing.column.name = id
mode = incrementing
numeric.mapping = null
numeric.precision.mapping = false
poll.interval.ms = 5000
query =
query.suffix =
quote.sql.identifiers = never
schema.pattern = null
table.blacklist = []
table.poll.interval.ms = 60000
table.types = [TABLE]
table.whitelist = [<table_name>]
tables = [default.<schema>.<table_name>]
timestamp.column.name = []
timestamp.delay.interval.ms = 0
timestamp.initial = null
topic.prefix = staging-
validate.non.null = false
Why does the connector additionally substitute the default scheme? and how to avoid it?
Instead of a request
SELECT * FROM <schema>.<table_name> WHERE <schema>.<table_name>.id > ? ORDER BY <schema>.<table_name>.id ASC
I get an error with
SELECT * FROM default.<schema>.<table_name> WHERE default.<schema>.<table_name>.id > ? ORDER BY default.<schema>.<table_name>.id ASC

Answer 1

You can create CH data source object like below (Where schema name is not passed).
final ClickHouseDataSource dataSource = new ClickHouseDataSource(
"jdbc:clickhouse://"+host+"/"+user+"?option1=one%20two&option2=y");
Then in SQL query, you can specify a schema name(schema.table). So it will not add the default schema in your query.