Hi. Could you please share what version you're using for flink and
postgres-cdc?
I guess the two jar versions don't match. The source function has been (weakly)
removed in flink 2.0.
--
Best！
Xuyang
At 2025-07-11 12:26:30, "" <[email protected]> wrote:
I need help to figure out the problem with sql-client.
With postgres-cdc jar copied to lib and execute the following sql statements,
got ClassNotFoundException.
Error:
Flink SQL> SELECT * FROM shipments;
[ERROR] Could not execute SQL statement. Reason:
java.lang.ClassNotFoundException:
org.apache.flink.streaming.api.functions.source.SourceFunction
Sql statements executed:
Flink SQL> CREATE TABLE shipments (
> shipment_id INT,
> order_id INT,
> origin STRING,
> destination STRING,
> is_arrived BOOLEAN
> ) WITH (
> 'connector' = 'postgres-cdc',
> 'hostname' = 'localhost',
> 'port' = '5432',
> 'username' = 'postgres',
> 'password' = 'postgres',
> 'database-name' = 'postgres',
> 'schema-name' = 'public',
> 'table-name' = 'shipments',
> 'slot.name' = 'flink',
> -- experimental feature: incremental snapshot (default off)
> 'scan.incremental.snapshot.enabled' = 'true'
> );
[INFO] Execute statement succeeded.
Flink SQL> SELECT * FROM shipments;
[ERROR] Could not execute SQL statement. Reason:
java.lang.ClassNotFoundException:
org.apache.flink.streaming.api.functions.source.SourceFunction
flink/lib:
