How to update and insert 100k CSV lines into the 10M records MS SQL Server database table by a cron job in a few seconds?

 How to update and insert 100k CSV lines into the 10M records MS SQL Server database table by a cron job in a few seconds?

Context

In my application, there is a CUSTOMER table containing more than 10 million records. And daily, another application will export CRM data to a CSV file and upload it to an S3 bucket. This CSV file usually contains about 30 thousand lines. In there, more than 1 thousand lines are new customers and the remaining are existing customers in the CUSTOMER table need to be updated their information. 1 cron job reads the CSV file and updates/inserts it to the CUSTOMER table. The issue here is if we update each of nearly 30k existing records into the CUSTOMER table with 10M records existing in there because it will take a few hours to complete. After googling for some solutions, I got a suggestion with the concept INSERT ON DUPLICATE KEY UPDATE. But this solution is usually only used in MySQL or PostgreSQL and not supported by MS SQL Server, instead of this, MS SQL Server has another solution to resolve this issue, which is the MERGE concept. Then, I have applied to my application then I take notes in a short demo here to reuse later and share someone finding solutions to resolve similar issues.

Idea

1. Just insert all CSV lines to a temporary table `CUSTOMER_TEMP` by using the MyBatis batch insert.
2. Call a SQL script by MyBatis ScriptRunner to merge data from the `CUSTOMER_TEMP` to the `CUSTOMER` table by the internal database engine.

In the real project, I'm using spring-boot-start-batch, but for demo purposes, I only write a short Java class to read the CSV file customers_100k_lines.csv from the current project folder instead of the S3 bucket, then batch insert to CUSTOMER_TEMP and call ScriptRunner to MERGE the data to the CUSTOMER table. The CSV file contains 50k lines are existing records in the CUSTOMER table should be updated and 500k are new ones, should be inserted. I'm also prepared 2 SQL scripts to create the CUSTOMER_TEMP and CUSTOMER table with 10M records existing. If you want to run this source code, please correct the database information in the application.yml file, then you can check the total time spent, and the time spent for batch insert and data merging in log files. Hope this is helpful for someone.

Logs:

Total records in CUSTOMER table before: 10000000
Total CSV lines: 100000. Total inserted to CUSTOMER_TEMP table: 100000 by 10 batchs. Time spent: 15589 (ms).
Time spent to merge data from CUSTOMER_TEMP to CUSTOMER table: 1325 (ms).
Total records in CUSTOMER table after: 10100000

Link to GitHub source code: https://github.com/koacervate/update-100k-csv-lines-to-10M-records-database-table 

References:

https://ichihedge.wordpress.com/2020/01/12/mybatis-save-or-update/

https://www.sqlshack.com/understanding-the-sql-merge-statement/

https://docs.microsoft.com/en-us/sql/t-sql/statements/merge-transact-sql?view=sql-server-ver15

QuickStart: How to connect to Oracle Database through TCPS (TCP/IP with SSL and TLS / Certificates) connection instead of TCP from Mac host to Oracle Database container.

Connect from your Mac to an Oracle Database container through TCPS (TCP/IP with SSL and TLS / Certificates) connection instead of TCP.

QuickStart: The fastest and easiest way to run an Instance of Oracle Database on Mac OS

In my previous post, I got some questions about how to connect to Oracle Database container through TCPS instead of TCP? So please follow the below steps for the questions:

In the previous post, we already have a docker container of Oracle Database Enterprise Edition Image running on our Mac, if you are not yet, please read the previous post first.

1) Download Oracle Instance Client for Mac includes Basic Package and SQL*Plus Package.

You should need a free Oracle account to download these package:

instantclient-basic-macos.x64-18.1.0.0.0.zip

instantclient-sqlplus-macos.x64-18.1.0.0.0.zip

Extract to one folder in your Mac.
After download and extract to a folder it should look like below:

Dos-Mac:instantclient_18_1 koacervate$ ll

total 480744

-rw-r--r--@ 1 koacervate  staff 1354 Feb 3 00:42 BASIC_README

-rw-rw-rw-@ 1 koacervate  staff 1358 Feb 3 00:42 SQLPLUS_README

-rwxr-xr-x@ 1 koacervate  staff 9888 Feb 3 00:42 adrci

drwxr-xr-x  7 koacervate  staff 224 Jul 30 23:28 client_wallet

drwxr-xr-x  7 koacervate  staff 224 Jul 27 23:23 client_wallet_backup

drwxr-xr-x  6 koacervate  staff 192 Jul 27 21:17 client_wallet_bk

-rwxr-xr-x@ 1 koacervate  staff 40448 Feb 3 00:42 genezi

-r-xr-xr-x@ 1 koacervate  staff 342 Apr 24 2015 glogin.sql

lrwxr-xr-x@ 1 koacervate  staff 20 Jul 24 21:36 libclntsh.dylib -> libclntsh.dylib.18.1

-r-xr-xr-x@ 1 koacervate  staff 94966232 Oct 30 2018 libclntsh.dylib.18.1

-r-xr-xr-x@ 1 koacervate  staff 4786360 Oct 30 2018 libclntshcore.dylib.18.1

-r-xr-xr-x@ 1 koacervate  staff 8554544 Oct 14 2018 libnnz18.dylib

lrwxr-xr-x@ 1 koacervate  staff 18 Jul 24 21:36 libocci.dylib -> libocci.dylib.18.1

-r-xr-xr-x@ 1 koacervate  staff 1593632 Oct 30 2018 libocci.dylib.18.1

-rwxr-xr-x@ 1 koacervate  staff 126944172 Feb 3 00:41 libociei.dylib

-r-xr-xr-x@ 1 koacervate  staff 151980 Oct 29 2018 libocijdbc18.dylib

-r-xr-xr-x@ 1 koacervate  staff 247244 Oct 8 2018 libons.dylib

-r-xr-xr-x@ 1 koacervate  staff 100492 Oct 30 2018 liboramysql18.dylib

-rwxrwxrwx@ 1 koacervate  staff 1277332 Feb 3 00:40 libsqlplus.dylib

-r-xr-xr-x@ 1 koacervate  staff 1655772 Oct 30 2018 libsqlplusic.dylib

drwxr-xr-x  3 koacervate  staff 96 Jul 27 22:02 log

drwxr-xr-x@ 5 koacervate  staff 160 Jul 30 23:34 network

-r-xr-xr-x@ 1 koacervate  staff 4161484 Dec 6 2017 ojdbc8.jar

drwxr-xr-x  7 koacervate  staff 224 Jul 27 23:22 server_wallet

-rwxr-xr-x@ 1 koacervate  staff 8528 Feb 3 00:42 sqlplus

-r-xr-xr-x@ 1 koacervate  staff 1366460 Dec 6 2017 ucp.jar

-rwxr-xr-x@ 1 koacervate  staff 150080 Feb 3 00:42 uidrvci

-rw-r--r--@ 1 koacervate  staff 74263 Feb 7 2018 xstreams.jar

2) Generate wallets (certificates) for both client-side (your Mac host) and server-side (your Oracle Database container).

You need to access to your Oracle Database container and use "orapki" tool generate wallets:

Dos-Mac:~ koacervate$ docker exec -it oracle-db /bin/bash
[oracle@0ef8c79a8c4b /]$

Create a folder to store server and create a new auto-login wallet for server-side:

[oracle@0ef8c79a8c4b /]$ mkdir -p /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet

[oracle@0ef8c79a8c4b /]$ orapki wallet create -wallet /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet -auto_login -pwd WalletPassword1

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ orapki wallet add -wallet /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet -dn "CN=`hostname`" -keysize 1024 -self_signed -validity 3650 -sign_alg sha256 -pwd WalletPassword1

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ orapki wallet display -wallet /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Requested Certificates: 

User Certificates:

Subject:        CN=0ef8c79a8c4b

Trusted Certificates: 

Subject:        CN=0ef8c79a8c4b

[oracle@0ef8c79a8c4b /]$ orapki wallet export -wallet /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet -dn "CN=`hostname`" -cert /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet/`hostname`_server.cert

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ ll /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet

total 12

-rw------- 1 oracle oinstall  643 Jul 30 15:39 0ef8c79a8c4b_server.cert

-rw------- 1 oracle oinstall 2477 Jul 30 15:36 cwallet.sso

-rw------- 1 oracle oinstall    0 Jul 30 15:34 cwallet.sso.lck

-rw------- 1 oracle oinstall 2432 Jul 30 15:36 ewallet.p12

-rw------- 1 oracle oinstall    0 Jul 30 15:34 ewallet.p12.lck

Create a folder to store and create a new auto-login wallet for client-side:

[oracle@0ef8c79a8c4b /]$ mkdir /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet

[oracle@0ef8c79a8c4b /]$ orapki wallet create -wallet /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet -auto_login -pwd WalletPassword1

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ orapki wallet add -wallet /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet -dn "CN=koacervate" -keysize 1024 -self_signed -validity 3650 -sign_alg sha256 -pwd WalletPassword1

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ orapki wallet display -wallet /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Requested Certificates: 

User Certificates:

Subject:        CN=koacervate

Trusted Certificates: 

Subject:        CN=koacervate

[oracle@0ef8c79a8c4b /]$ orapki wallet export -wallet /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet -dn "CN=koacervate" -cert /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet/koacervate_client.cert

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ ll /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet

total 12

-rw------- 1 oracle oinstall 2461 Jul 30 16:13 cwallet.sso

-rw------- 1 oracle oinstall    0 Jul 30 16:12 cwallet.sso.lck

-rw------- 1 oracle oinstall 2416 Jul 30 16:13 ewallet.p12

-rw------- 1 oracle oinstall    0 Jul 30 16:12 ewallet.p12.lck

-rw------- 1 oracle oinstall  634 Jul 30 16:15 koacervate_client.cert

Exchange the certificates between client and server-side:

orapki wallet add -wallet /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet -trusted_cert -cert /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet/0ef8c79a8c4b_server.cert -sign_alg sha256 -pwd WalletPassword1

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

[oracle@0ef8c79a8c4b /]$ orapki wallet add -wallet /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet -trusted_cert -cert /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet/koacervate_client.cert -sign_alg sha256 -pwd WalletPassword1

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Operation is successfully completed.

Show the certificates after exchange to verify:

[oracle@0ef8c79a8c4b /]$ orapki wallet display -wallet /u01/app/oracle/product/12.2.0/dbhome_1/client_wallet

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Requested Certificates: 

User Certificates:

Subject:        CN=koacervate

Trusted Certificates: 

Subject:        CN=0ef8c79a8c4b

Subject:        CN=koacervate

[oracle@0ef8c79a8c4b /]$ orapki wallet display -wallet /u01/app/oracle/product/12.2.0/dbhome_1/server_wallet

Oracle PKI Tool : Version 12.2.0.1.0

Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.

Requested Certificates: 

User Certificates:

Subject:        CN=0ef8c79a8c4b

Trusted Certificates: 

Subject:        CN=0ef8c79a8c4b

Subject:        CN=koacervate

3) Configure listener.ora, sqlnet.ora, tnsnames.ora in Oracle Database container (server-side). 

Note: In the previous post, we mapped only port 1521/1521 from Oracle Database container to Mac host. But in this post, I want to support both TCP/1521 and TCPS/1525 so I added port 1525/1525 to "ExposedPorts" and "NetworkSettings", I will cover this in another post. And if you want to support both TCP/1521 and TCPS/1525 you can try with a new Oracle Database container with this command:

Dos-Mac:instantclient_18_1 koacervate$ docker run -d -it --name oracle-db -p 1521:1521/tcp -p 1525:1525/tcp -p 5500:5500/tcp  store/oracle/database-enterprise:12.2.0.1

0ef8c79a8c4b30fca3dda74cec5bd91cf03e01518be8d43a4bc241cdd1fbbc41

The original of those files in the container look like as below:

[oracle@0ef8c79a8c4b /]$ cat /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB_backup/listener.ora

LISTENER =   (DESCRIPTION_LIST =     (DESCRIPTION =       (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))       (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))     )   ) 

DIAG_ADR_ENABLED = off

SSL_VERSION = 1.0

[oracle@0ef8c79a8c4b /]$ cat /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB_backup/sqlnet.ora  

NAME.DIRECTORY_PATH= {TNSNAMES, EZCONNECT, HOSTNAME}

SQLNET.EXPIRE_TIME = 10

SSL_VERSION = 1.0

[oracle@0ef8c79a8c4b /]$ cat /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB_backup/tnsnames.ora 

ORCLCDB =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLCDB.localdomain)     )   ) 

ORCLPDB1 =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLPDB1.localdomain)     )   ) 

[oracle@0ef8c79a8c4b /]$

and will be modified as below:

[oracle@0ef8c79a8c4b /]$ cat /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/listener.ora

WALLET_LOCATION=(SOURCE=(METHOD=FILE)(METHOD_DATA=(DIRECTORY=/u01/app/oracle/product/12.2.0/dbhome_1/server_wallet)))

LISTENER =

 (DESCRIPTION_LIST =

  (DESCRIPTION =

   (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))

  )

  (DESCRIPTION =

   (ADDRESS = (PROTOCOL = TCPS)(HOST = 0.0.0.0)(PORT = 1525))

  )

  (DESCRIPTION =

   (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

  )

 )

ADR_BASE_LISTENER = /u01/app/oracle/product/12.2.0/dbhome_1/log

DIAG_ADR_ENABLED = off

SSL_VERSION = 1.0

[oracle@0ef8c79a8c4b /]$ cat /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/sqlnet.ora  

SQLNET.AUTHENTICATION_SERVICES = (NTS)

WALLET_LOCATION=(SOURCE=(METHOD=FILE)(METHOD_DATA=(DIRECTORY=/u01/app/oracle/product/12.2.0/dbhome_1/server_wallet)))

SSL_CLIENT_AUTHENTICATION=TRUE

SSL_CIPHER_SUITES = (SSL_RSA_WITH_AES_256_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA)

SECURE_REGISTER_LISTENER = (IPC)

NAME.DIRECTORY_PATH= {TNSNAMES, EZCONNECT, HOSTNAME}

SQLNET.EXPIRE_TIME = 10

SSL_VERSION = 1.0

[oracle@0ef8c79a8c4b /]$ cat /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/tnsnames.ora 

ORCLCDB =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLCDB.localdomain)     )   ) 

ORCLCDB_SSL =

 (DESCRIPTION =

  (ADDRESS_LIST =

   (ADDRESS = (PROTOCOL = TCPS)(HOST = 0.0.0.0)(PORT = 1525))

 )

 (CONNECT_DATA =

  (SERVICE_NAME = ORCLCDB.localdomain)))

ORCLPDB1 =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = 0.0.0.0)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLPDB1.localdomain)     )   ) 

Now we need to restart lsnrctl service to load the changed above.

[oracle@0ef8c79a8c4b /]$ lsnrctl stop

LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 30-JUL-2019 17:02:56

Copyright (c) 1991, 2016, Oracle.  All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=0.0.0.0)(PORT=1521)))

The command completed successfully

[oracle@0ef8c79a8c4b /]$ lsnrctl start

LSNRCTL for Linux: Version 12.2.0.1.0 - Production on 30-JUL-2019 17:03:02

Copyright (c) 1991, 2016, Oracle.  All rights reserved.

Starting /u01/app/oracle/product/12.2.0/dbhome_1/bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 12.2.0.1.0 - Production

System parameter file is /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/listener.ora

Log messages written to /u01/app/oracle/product/12.2.0/dbhome_1/log/diag/tnslsnr/0ef8c79a8c4b/listener/alert/log.xml

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=0.0.0.0)(PORT=1525)))

Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=0.0.0.0)(PORT=1521)))

STATUS of the LISTENER

------------------------

Alias                     LISTENER

Version                   TNSLSNR for Linux: Version 12.2.0.1.0 - Production

Start Date                30-JUL-2019 17:03:02

Uptime                    0 days 0 hr. 0 min. 0 sec

Trace Level               off

Security                  ON: Local OS Authentication

SNMP                      OFF

Listener Parameter File   /u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/listener.ora

Listener Log File         /u01/app/oracle/product/12.2.0/dbhome_1/log/diag/tnslsnr/0ef8c79a8c4b/listener/alert/log.xml

Listening Endpoints Summary...

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcps)(HOST=0.0.0.0)(PORT=1525)))

  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC1521)))

The listener supports no services

The command completed successfully

It's time to verify it works or not from server-side before we continue with client-side.

[oracle@0ef8c79a8c4b /]$ tnsping ORCLCDB_SSL

TNS Ping Utility for Linux: Version 12.2.0.1.0 - Production on 30-JUL-2019 15:57:35

Copyright (c) 1997, 2016, Oracle.  All rights reserved.

Used parameter files:

/u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/sqlnet.ora

Used TNSNAMES adapter to resolve the alias

Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCPS)(HOST = 0.0.0.0)(PORT = 1525))) (CONNECT_DATA = (SERVICE_NAME = ORCLCDB.localdomain)))

OK (70 msec)

Nice, we have done in server-side, now we exit the container and move client_wallet (certificates) and sqlnet.ora, tnsnames.ora to your Mac host.

[oracle@0ef8c79a8c4b /]$ exit

exit

Dos-Mac:instantclient_18_1 koacervate$

docker cp Oracle-DB:/u01/app/oracle/product/12.2.0/dbhome_1/client_wallet /Users/koacervate/TOOL/instantclient_18_1/

Dos-Mac:instantclient_18_1 koacervate$ docker cp oracle-db:/u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/sqlnet.ora /Users/koacervate/TOOL/instantclient_18_1/network/admin/

Dos-Mac:instantclient_18_1 koacervate$ docker cp oracle-db:/u01/app/oracle/product/12.2.0/dbhome_1/admin/ORCLCDB/tnsnames.ora /Users/koacervate/TOOL/instantclient_18_1/network/admin/

And we will modify sqlnet.ora, tnsnames.ora for client-side as below:

Dos-Mac:instantclient_18_1 koacervate$ cat /Users/koacervate/TOOL/instantclient_18_1/network/admin/sqlnet.ora

SQLNET.AUTHENTICATION_SERVICES = (NTS)

WALLET_LOCATION=(SOURCE=(METHOD=FILE)(METHOD_DATA=(DIRECTORY=/Users/koacervate/TOOL/instantclient_18_1/client_wallet)))

SSL_CLIENT_AUTHENTICATION=TRUE

SSL_CIPHER_SUITES = (SSL_RSA_WITH_AES_256_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA)

SECURE_REGISTER_LISTENER = (IPC)

NAME.DIRECTORY_PATH= {TNSNAMES, EZCONNECT, HOSTNAME}

SQLNET.EXPIRE_TIME = 10

SSL_VERSION = 1.0

Dos-Mac:instantclient_18_1 koacervate$ cat /Users/koacervate/TOOL/instantclient_18_1/network/admin/tnsnames.ora

ORCLCDB =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLCDB.localdomain     )   ) 

ORCLCDB_SSL =

 (DESCRIPTION =

  (ADDRESS_LIST =

   (ADDRESS = (PROTOCOL = TCPS)(HOST = localhost)(PORT = 1525))

 )

 (CONNECT_DATA =

  (SERVICE_NAME = ORCLCDB.localdomain)))

ORCLPDB1 =   (DESCRIPTION =     (ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))     (CONNECT_DATA =       (SERVER = DEDICATED)       (SERVICE_NAME = ORCLPDB1.localdomain)     )   ) 

Dos-Mac:instantclient_18_1 koacervate$

Ok, its time to verify overall of the processes above.

with SQL*Plus:

Dos-Mac:instantclient_18_1 koacervate$ ./sqlplus system/Oradoc_db1@ORCLCDB_SSL

SQL*Plus: Release 18.0.0.0.0 Production on Wed Jul 31 01:53:19 2019

Version 18.1.0.0.0

Copyright (c) 1982, 2018, Oracle.  All rights reserved.

Last Successful login time: Wed Jul 31 2019 01:49:47 +07:00

Connected to:

Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production

SQL>

with SQL Developer ...

Error Notes:

- ERROR: ORA-12154: TNS:could not resolve the connect identifier specified -> if you are incorrect HOST or SERVICE_NAME in tnsnames.ora.

- ERROR: ORA-28860: Fatal SSL error -> if you missing: SSL_CIPHER_SUITES = (SSL_RSA_WITH_AES_256_CBC_SHA, SSL_RSA_WITH_3DES_EDE_CBC_SHA).
- ERROR: ORA-28864: SSL connection closed gracefully -> if you missing: "-sign_alg sha256".

References:
- https://database.edorex.ch/blog/database-connection-with-a-certificate/
- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/how-to-setting-up-encrypted-communications-channels-in-oracle-database/
- https://oracle-base.com/articles/misc/configure-tcpip-with-ssl-and-tls-for-database-connections
- https://rbikblog.wordpress.com/2018/02/21/tcps-listener-configuration-for-oracle-database-12c/

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