Flink connector Oracle CDC synchronizes data to MySQL in real time (oracle12c)

Continue with a document 《Flink connector Oracle CDC Synchronize data in real time to MySQL（Oracle19c）》 What I said last time is Oracle19c Configuration mode of version . In the process of data synchronization, there is a delay in reading data , The following configuration is required ：

'debezium.log.mining.strategy'='online_catalog',
'debezium.log.mining.continuous.mine'='true'

But Oracle19c Cancel the configuration of this component . Change the back Oracle12c edition ,CDC The configuration of is slightly different .
The difference lies in creating users and authorizations , Need to make some adjustments, otherwise in Flink Call in DBMS_LOGMNR.START_LOGMNR When “ The user doesn't exist ” The problem of .

Error report - ORA-01435: user does not exist ORA-06512: at
“SYS.DBMS_LOGMNR”, line 72 ORA-06512: at line 3
01435. 00000 - “user does not exist”
*Cause:
*Action:

12c The configuration is as follows ：

--create C##family user on CDB
CREATE USER C##family IDENTIFIED BY family DEFAULT TABLESPACE LOGMINER_TBS QUOTA UNLIMITED ON LOGMINER_TBS ACCOUNT UNLOCK;

-- allow access to all PDBs to the C##family user
ALTER USER C##family SET CONTAINER_DATA=ALL CONTAINER=CURRENT

-- grant needed permissions
GRANT DBA to C##family ;
GRANT CREATE SESSION TO C##family ;
GRANT CREATE TABLE TO C##family ;
GRANT EXECUTE_CATALOG_ROLE TO C##family ;
GRANT EXECUTE ON DBMS_LOGMNR TO C##family ;
GRANT SELECT ON V_$DATABASE TO C##family ;
GRANT SELECT ON V_$LOGMNR_CONTENTS TO C##family ;
GRANT SELECT ON V_$ARCHIVED_LOG TO C##family ;
GRANT SELECT ON V_$LOG TO C##family ;
GRANT SELECT ON V_$LOGFILE TO C##family ;
GRANT RESOURCE, CONNECT TO C##family ;

12c There are many pits , There are the following questions ：

1. When you create a user, you will be prompted ” Space does not exist “,12c and 19c Dissimilarity ,12c Of CDB and PDB To create table spaces separately ;
   stay PDB Create a table space in ：
   View current container ：show con_name -- View current container ;
   Switch container to PDB：alter session set container=ORCLSPDB; -- Convert container to PDB
   Switch PDB To the container ：alter session set container=CDB$ROOT; -- Convert container to CDB
   Be careful ： The filename cannot be with CDB The same as in China , It doesn't matter if it's in a different directory .
2. Oracle After restart, it can't be connected , As a result of 12 It's starting to introduce CDB and PDB, It will only be opened by default when restarting CDB,PDB Is still in the mount, Manual opening required ：
   show pdbs; // Query all of the database PDB
   alter pluggable database orclpdb open; // Modify pluggable libraries orclpdb open
   There is a one-step command ：alter pluggable database all open;– Directly open all PDB

Post some orders ：
Delete users and table spaces ：

SQL> drop user jack cascade;
SQL> drop tablespace school including contents and datafiles;