The star tool is a cross-platform command-line tool, distributed as a stand-alone console application, used to manage Starcounter databases and applications. By using the star tool, you can – for example – create, modify, delete and query Starcounter databases, as well as import and export data from compatible 3:rd party data sources.

The easiest way to explore the features of the star tool is to use it, in particular with the --help option, which prints help information about available commands and options. In this article, we will provide a reference for the available commands and describe some common use cases.

Distribution

The Windows and Linux versions of the tool are downloaded together with the main Starcounter binaries. For Linux operating systems, make sure to also install the prerequisites listed at the installation page and grant execution permissions (chmod -R u+x /path/to/star/tool/folder).

Usage

The star tool is a console application with a command-line interface, and we interact with it using commands, options and arguments.

The global command pattern is:

star [options] [command]

Specific commands may have different sub-patterns, which are defined in their respective sections below. The option --help is defined for each command, and can be used to print details on available options and sub-commands.

In examples below, Windows-style directory paths are used. On Linux operating systems, the star tool expects Linux-style paths.

Commands

The available commands can be split into four categories:

• ​Database management commands, used for creating and starting databases.

• ​Import and export commands, used for importing and exporting data to or from SQLite database files.

• ​Information commands, e.g. printing all tables or listing all indexes of a given table.

• ​SQL REPL, used for executing DML and DDL statements manipulating the database schema and data.

Database management

new

star new [options] <path>

The new command creates a new database at the absolute or relative path provided in the <path> argument. If the directory referenced by the path does not exist, it will be created. To create a new database at the path C:\databases\mydb, we run:

star new C:\databases\mydb

start

star start [options] <db>

The start command starts the database referenced by the absolute or relative path given in the <db> argument. To start an existing database located at C:\databases\mydb, we run:

star start C:\databases\mydb

Import and export

reload

star reload [options] <db> <file>

The reload command takes data from an SQLite database file referenced by the absolute or relative path in the <file> argument and imports that data into the database referenced by the absolute or relative path given in the <db> argument. To load data from an SQLite database file named myDatabase.sqlite3 located in C:\databases into an existing database located at C:\databases\mydb, we run:

star reload C:\databases\mydb C:\databases\myDatabase.sqlite3

Note: only files created with the unload command can be reloaded.

unload

star unload [options] <db> <file>

The unload command selects the SQLite database file at the path given in the <file> argument, or creates one if it doesn't exists, and then takes data from a database referenced by the absolute or relative path given in the <db> argument and imports that data into the created SQLite database. To load data from an existing database located at C:\databases\mydb into a new SQLite database file named myDatabase.sqlite3 at C:\databases, we run:

star unload C:\databases\mydb C:\databases\myDatabase.sqlite3

Information

list

star list [options] [command]

The list command is used together with one of the following sub-commands to list ranges of entities in a database:

list table

star list table [options] <db>

The list table sub-command lists all tables in the database referenced by the absolute or relative path given in the <db> argument. The following options are available to configure the output of the command:

Formatting options:

• t – Include the name of the table to list.

• b – Include the name of the base table (if inherited) of the table to list.

To list all tables of an existing database located at C:\databases\mydb, including only user tables and displaying both the name of the table and the name of its base table (if any), we run:

star list table -u -f tb C:\databases\mydb

list index

star list index [options] <db> <table>

The list index sub-command lists all indexes in a table, the name of which is specified by the <table> argument, in the database referenced by the absolute or relative path given in the <db> argument. The following options are available to configure the output of the commmand:

Formatting options:

• i – Include the name of the index to list.

• t – Include the name of the table of the index.

• u – Include whether or not the index is unique.

To list all indexes of the table MyApp.Superhero, of an existing database located at C:\databases\mydb, including both user indexes and system indexes and both the name of the index and whether it's unique, we run:

star list index -u -s -f iu C:\databases\mydb MyApp.Superhero

info

star info [options] [command]

The info command is used together with one of the following sub-commands to print info about some specific entity in a database:

info table

star info table [options] <db> <table>

The info table sub-command prints detailed information about a table, the name of which is specified in the <table> argument, in the database referenced by the absolute or relative path given in the <db> argument. The following options are available to configure the output of the command:

Formatting options:

• c – Include the name of the columns of the table to list.

• t – Include the datatype of the columns of the table to list.

• n – For each column, include whether it accepts null values in table cells.

• i – For each column, include whether it is inherited.

• b – Include the name of the table of the column.

To list all user columns of the MyApp.Superhero table of an existing database located at C:\databases\mydb, including inherited columns and listing only the names and the datatypes of columns, we run:

star info table -u -i -f ct C:\databases\mydb MyApp.Superhero

info index

star info index [options] <db> <index>

The info index sub-command prints detailed information about an index, the name of which is specified in the <index> argument, in the database referenced by the absolute or relative path given in the <db> argument. The following options are available to configure the output of the command:

Formatting options:

• c – Include the name of the column that the index is registered on.

• b – Include the name of the table that holds the column that the index is registered on.

To list all indexes of the MyApp.Superhero table of an existing database located at C:\databases\mydb, including only the name of the column of the index, we run:

star info index -f c C:\databases\mydb MyApp.Superhero

SQL REPL

sql

star sql [options] <db>

The star tool includes a built-in SQL REPL (read-eval-print loop) component that can be used to execute DDL and DML statements on the database referenced by the absolute or relative path given in the <db> argument.

To enter the SQL REPL for an existing database located at C:\databases\mydb, we run:

star sql C:\databases\mydb

For more information on how to write SQL queries to a Starcounter database, and supported DDL statements, see the SQL section of the documentation.