[FLINK-24397] Reduce legacy in Table API connectors

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.15.0
• Fix Version/s: 1.15.0
• Component/s: Connectors / Common, Table SQL / API
• Labels: pull-request-available
• Release Note: The old JDBC connector (indicated by `connector.type=jdbc` in DDL) has been removed. If not done already, users need to upgrade to the newer stack (indicated by `connector=jdbc` in DDL).
• Assignee: Fabian Paul
• Reporter: Fabian Paul
• Created: 28/Sep/21 11:02
• Updated: 07/Jan/22 13:04
• Resolved: 20/Oct/21 08:18

Description

The TableSchema class is now deprecated for a while but a lot of connectors still depend on it use (DynamicTableSources and DynamicTableSinks). We should reduce the usage of the TableSchema to provide a better example for external contributions and allow us eventually to drop the TableSchema.

It also drops the legacy JDBC connector.

Issue Links

• causes: FLINK-25239 Delete useless variables
• links to: GitHub Pull Request #17459