Docker Extension

sqlcl extension for Docker Desktop

Manual Installation

Until this extension is ready at Docker Extension Hub you can install just by executing:

$ docker extension install mochoa/sqlcl-docker-extension:22.2.1
Extensions can install binaries, invoke commands and access files on your machine. 
Are you sure you want to continue? [y/N] y
Installing new extension "mochoa/sqlcl-docker-extension:22.2.1"
Installing service in Desktop VM...
Setting additional compose attributes
VM service started
Installing Desktop extension UI for tab "sqlcl"...
Extension UI tab "sqlcl" added.
Extension "Oracle SQLcl client tool" installed successfully

Note: Docker Extension CLI is required to execute above command, follow the instructions at Extension SDK (Beta) -> Prerequisites page for instructions on how to add it.

Using SQLcl Docker Extension

Once the extension is installed a new extension is listed at the pane Extension (Beta) of Docker Desktop.

By clicking at SQLcl icon the extension main window will display a progress bar for a few second and finally SQLcl is launched.

SQLcl is not logged into the Oracle RDBMS you should log using connect command, for example for scott user on OracleXE is.

Note that an Oracle server running at Docker Desktop or externals is not localhost, the IP for OracleXE running at Docker Desktop is available at the menu, Settings -> Resources -> Network -> Docker subnet, in my case is 192.168.65.0/24 so an internal IP for reaching OracleXE container running at Docker Desktop will be 192.168.65.2, , also there is an internal DNS name that resolve above IP named host.docker.internal.

Let see an example of OracleXE started using OracleXE Docker Desktop Extension:

SQL> connect scott/tiger@host.docker.internal:1521/xepdb1

which means for a sqlcl Add New Server:

Hostname/address: host.docker.internal
Port: 1521
PDB: xepdb1
Username: scott
Password: tiger

the extension have a persistent history of command, if you choose exit and start again SQLcl Docker Extension just use cursor up and down to navigate on history entries.

Upload/Download files

If you want to import/export large files from/to Oracle RDBMs using some of the functionality of SQLcl such as dp (Data Pump) or load command is necessary to provide that files to the extension persistent volume, you can check it by using Volumes menu:

Persistent volume is mochoa_sqlcl-docker-extension-desktop-extension_sqlcl_home.

A sample usage taken from Jeff Smith blog but using SQLcl Docker Extension is:

SQL> set feedback off
SQL> spool objects.csv
SQL> SELECT * FROM all_objects fetch FIRST 100 ROWS ONLY;
SQL> spool off

copy exported data to you local file system and upload again in another directory, run this in a command line shell:

docker cp mochoa_sqlcl-docker-extension-desktop-extension-service:/home/sqlcl/objects.csv .
docker cp objects.csv mochoa_sqlcl-docker-extension-desktop-extension-service:/tmp

finally import again using SQLcl LOAD command:

SQL> CREATE TABLE demo_load AS SELECT * FROM all_objects WHERE 1=2;
Table DEMO_LOAD created.
SQL> load demo_load /tmp/objects.csv
Load data into table SCOTT.DEMO_LOAD
csv
column_names on
delimiter ,
enclosures ""
encoding UTF8
row_limit off
row_terminator default
skip_rows 0
skip_after_names
#INFO Number of rows processed: 100
#INFO Number of rows in error: 0
#INFO No rows committed
SUCCESS: Processed without errors
SQL> set sqlformat default
SQL> select count(*) from demo_load;
  COUNT(*)
----------
       100

Connect to Oracle Cloud Autonomous DB

SQLcl Desktop Extension is able to connect to your autonomous DB, you have to download first your Wallet file from OCI cloud console as is described into Download Database Connection Information, you will see a tab like:

Once you have a Zip file upload it to SQLcl persistent volume using docker cp command:

docker cp Wallet_DBparquet.zip mochoa_sqlcl-docker-extension-desktop-extension-service:/home/sqlcl

finally use you Wallet inside SQLcl Docker Extension using:

SQL> set cloudconfig /home/sqlcl/Wallet_DBparquet.zip
SQL> connect admin/***********@dbparquet_high
SQL> desc demo_tab
SQL> select count(*) from demo_tab;

Uninstall

To uninstall the extension just execute:

$ docker extension uninstall mochoa/sqlcl-docker-extension:22.2.1
Extension "Oracle SQLcl client tool" uninstalled successfully

Source Code

As usual the code of this extension is at GitHub, feel free to suggest changes and make contributions, note that I am a beginner developer of React and TypeScript so contributions to make this UI better are welcome.