Gabriel39 opened a new pull request, #65709:
URL: https://github.com/apache/doris/pull/65709
### What problem does this PR solve?
Issue Number: None
Related PR: None
Problem Summary: ClickHouse JDBC V2 exposes databases as schemas and reports
distributed tables as `REMOTE TABLE`. Doris inferred the database metadata mode
from the legacy `databaseterm` URL parameter and filtered the vendor table
type, so V2 catalogs could not discover databases or distributed tables. This
change uses JDBC metadata capabilities to select catalog/schema mode and
includes remote tables in discovery in both JDBC client implementations.
### Release note
Support ClickHouse JDBC V2 schema metadata and distributed table discovery.
### Check List (For Author)
- Test: Regression test and Unit Test
- `JdbcClickHouseClientTest`
- `JdbcClickHouseConnectorClientTest`
- `test_clickhouse_jdbc_v2`
- Behavior changed: Yes. ClickHouse JDBC V2 catalogs now use schema metadata
and expose distributed tables.
- Does this need documentation: No
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