[Bug]--database parameters are not specified,When you dynamically monitor a new table, a null database is created

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Version

flink1.15.2
flink-doris-connector-1.15-25.1.0.jar

What's Wrong?

not specified --database
but --single-sink true
Create a new table in the upstream source database，The logs are as follows：

INFO org.apache.doris.flink.sink.schema.SchemaChangeManager [] - Execute SQL: CREATE TABLE IF NOT EXISTS null.t_test(id BIGINT COMMENT '' ) UNIQUE KEY(id) DISTRIBUTED BY HASH(id) BUCKETS AUTO PROPERTIES ('replication_num'='1','light_schema_change'='true')
INFO org.apache.doris.flink.sink.writer.serializer.jsondebezium.JsonDebeziumSchemaChangeImplV2 [] - create table ddl status: true, add tableMapping live_test.t_test,null.t_test

What You Expected?

Dynamically added tables are written to the corresponding downstream databases

How to Reproduce?

not specified --database
but --single-sink true
Create a new table in the upstream source database

Anything Else?

No response

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct