Is there a specific reason for using Statement.RETURN_GENERATED_KEYS in JDBCSink?

[artorias1024]

 this.upsertStatement = conn.prepareStatement(upsertSql.get(), Statement.RETURN_GENERATED_KEYS);
// upsert sink will handle DELETE events
var deleteSql = jdbcDialect.getDeleteStatement(schemaTableName, pkColumnNames);
this.deleteStatement = conn.prepareStatement(deleteSql, Statement.RETURN_GENERATED_KEYS);

[kwannoel]

We have amended it: #22280.