Difference between revisions of "Command-Line Client"

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This page is part of the [[Getting Started]] Section.
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This page is part of the [[Getting Started]] Section. It introduces you to the standalone command-line mode of BaseX.
BaseX offers a standalone console mode from which all [[Commands|database commands]] can be executed.
 
The article on the [[Database Server]] provides numerous examples for running commands in the console mode
 
(note that the GUI does ''not'' interact with the client/server architecture).
 
  
 
=Startup=
 
=Startup=
  
First of all, please launch a '''standalone''' version of BaseX: double click on the '''BaseX''' icon, or run the <code>basex</code> script. [[Startup#Standalone|Follow this link]] for more information (or check out the additional [[Command-Line Options#Standalone|command-line options]]).
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The command-line client can be started as follows:
  
=Create a database=
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* Run one of the {{Code|basex}} or {{Code|basex.bat}} scripts.
 +
* If you have installed BaseX on ''Windows'', click on the '''BaseX Standalone''' icon.
  
* To create a database you need an XML document, e.g. [http://files.basex.org/xml/factbook.xml factbook.xml].
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All operations will be performed with admin permissions (no password needs to be supplied). Various [[Command-Line_Options#Standalone|command-line options]] are available to simplify batch processing. The [[Start_Scripts|start script]] can be adjusted for individual purposes (e.g. if the default memory limit is too restrictive).
* Save this document to the directory you are working in.
+
 
* In the client terminal, type in:
+
The standalone client must not be used if you perform parallel (concurrent) read and write operations on your databases. See [[Startup#Concurrent Operations|Concurrent Operations]] for more details.
 +
 
 +
=Operations=
 +
 
 +
==Create a Database==
 +
 
 +
To create a database, you need an XML document, e.g., [https://files.basex.org/xml/factbook.xml factbook.xml]. Save this document to your working directory and type in the following command to create and open the database:
 
<code>
 
<code>
> [[Commands#CREATE DB|CREATE DB]] factbook factbook.xml
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> {{Command|CREATE DB}} factbook factbook.xml
 
</code>
 
</code>
  
 
: '''factbook''' is the name of the database <br/>
 
: '''factbook''' is the name of the database <br/>
: '''factbook.xml''' is the xml file, which is used to create the database<br/>    
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: '''factbook.xml''' is the initial input of the database<br/>
 +
 
 +
By default, databases are stored in the <code>basex/data</code> directory of your project’s home directory. Depending on your [[Configuration]], the location may vary.
 +
 
 +
==Execute a Query==
  
If everything works you see the following lines:
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The {{Commands|XQUERY}} command lets you run a query. The following query returns all country elements of the currently opened database:
<pre>Database 'factbook' created in 950.83 ms.
 
</pre>
 
 
; Where is the database stored?
 
By default, databases are stored in the <code>BaseXData</code> directory, which is located in your home folder.
 
Depending on your [[Configuration]], the location of your home folder varies. For example, on a Mac it's <code>/Users/John</code>, if your name is John. If you have used the Windows Installer, the directory will be named <code>data</code>, and reside in the application directory.
 
  
=Execute a query=
 
The [[Commands#XQUERY|XQUERY]] command lets you run a query.
 
* For example, this query returns all country nodes in the currently opened database.
 
 
<code>
 
<code>
> [[Commands#XQUERY|XQUERY]] //country
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> {{Command|XQUERY}} //country
 
</code>
 
</code>
  
* You can also run queries in files:
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You can also run queries in files:
 +
 
 
<code>
 
<code>
> [[Commands#RUN|RUN]] /Users/John/query.xq
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> {{Command|RUN}} /path/to/query.xq
 
</code>
 
</code>
  
=Create a new database=
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==Database Commands==
Now we will create another database from the [http://files.basex.org/xml/xmark.xml xmark.xml] document.
 
  
* Create the new database, named 'xmark'.
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The following command lists all databases that can be opened by the currently logged-in user:
<code>
 
> [[Commands#CREATE DB|CREATE DB]] xmark xmark.xml
 
</code>
 
  
* Set the new database xmark as the context:
 
 
<code>
 
<code>
> [[Commands#OPEN|OPEN]] xmark
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> {{Command|LIST}}
 
</code>
 
</code>
  
* Now you can easily execute queries on your new database:
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To open an existing database, execute the following:
<code>
 
> [[Commands#XQUERY|XQUERY]] //people/person/name
 
</code>
 
  
=Switch the database=
 
* You can explicitly query the factbook database with the <code>doc(...)</code> funtion, no matter what the current context is.
 
 
<code>
 
<code>
> [[Commands#XQUERY|XQUERY]] doc("factbook")//country
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> {{Command|OPEN}} factbook
 
</code>
 
</code>
  
* Otherwise, to set factbook as the current context, execute the following:
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To get information on the currently opened database, type:
<code>
 
> [[Commands#OPEN|OPEN]] factbook
 
</code>
 
  
* The following command lists all databases than can be opened by the currently logged in users:
 
 
<code>
 
<code>
> [[Commands#LIST|LIST]]
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> {{Command|INFO}}
 
</code>
 
</code>
  
=Close or delete a database=
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You can also address a database within your query with the {{Function|Database|db:get}} function:
* To [[Commands|close]] the current context database, please type:  
 
<code>
 
> [[Commands#CLOSE|CLOSE]]
 
</code>
 
  
* Use the [[Commands#DROP DB|DROP DB]] command to delete the xmark database:
 
 
<code>
 
<code>
> [[Commands#DROP DB|DROP DB]] xmark
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> {{Command|XQUERY}} db:get("factbook")//country
 
</code>
 
</code>
  
=Create a collection=
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To close the current database, please type:
'''What is a collection?'''
 
With BaseX you can group documents into one logical collection. A collection is a database that contains two or more documents. Collections accept any type of XML documents, regardless of their structure.
 
  
Let's add the xmark.xml document to the factbook database to create a collection. The name of the original factbook database remains.
 
 
* First make sure factbook is opened:
 
 
<code>
 
<code>
> [[Commands#OPEN|OPEN]] factbook
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> {{Command|CLOSE}}
 
</code>
 
</code>
  
* Now add the xmark.xml document:  
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A database can eventually be dropped again:
 +
 
 
<code>
 
<code>
> [[Commands#ADD|ADD]] xmark.xml
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> {{Command|DROP DB}} factbook
 
</code>
 
</code>
  
=Delete a document=
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==Multiple Resources==
* Deleting a document from a collection is easy:
 
<code>
 
> [[Commands#DELETE|DELETE]] xmark.xml
 
</code>
 
  
Make sure that the collection, which contains the '''xmark.xml''' document, is opened.
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One database can contain not only a single, but millions of documents. All documents can have a different structure.
  
=Delete a collection=
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With the following commands, you can create an empty database and add two documents. It is also possible to address resources via URLs:
Deleting a collection is the same as deleting a database.
 
  
* To delete the collection factbook, type:
 
 
<code>
 
<code>
> [[Commands#DROP DB|DROP DB]] factbook
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> {{Command|CREATE DB}} store
 +
</code><br/>
 +
<code>
 +
> {{Command|ADD}} factbook.xml
 +
</code><br/>
 +
<code>
 +
> {{Command|ADD}} http://files.basex.org/xml/xmark.xml
 
</code>
 
</code>
  
=Get server information=
+
Deleting a document from a database is easy, but make sure that the database, which contains the addressed document, is currently opened:
Several commands help to explore the state of a server. For a complete list, please visit the [[Commands]] Section.
 
  
* To see all databases on the server, type:
 
 
<code>
 
<code>
> [[Commands#LIST|LIST]]
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> {{Command|DELETE}} factbook.xml
 
</code>
 
</code>
  
* To see the general information of the opened database, type:
+
==Backup and Restore==
<code>
 
> [[Commands#INFO|INFO]]
 
</code>
 
  
* To list all sessions that are managed by the server instance, type:
+
To back up and restore your database, type:
<code>
 
> [[Commands#SHOW USERS|SHOW USERS]]
 
</code>
 
  
=Backup and restore=
 
* To backup your database, type:
 
 
<code>
 
<code>
> [[Commands#CREATE BACKUP|CREATE BACKUP]] factbook
+
> {{Command|CREATE BACKUP}} factbook
</code>
+
</code><br/>
 
 
* To restore your database, type:
 
 
<code>
 
<code>
> [[Commands#RESTORE|RESTORE]] factbook
+
> {{Command|RESTORE}} factbook
 
</code>
 
</code>
  
'''Where is the backup-file stored?'''
+
The backup file is stored in the database directory. It contains the name of the database and a timestamp: <code>[db-name]-[timestamp].zip</code>. If a database is to be restored, and if several backups exist, the backup with the newest timestamp is taken.
 
 
The backup-file is stored in the database directory.
 
The file is named <code>factbook-timestamp.zip</code> (<code>db_name-timestamp.zip</code>).
 
To restore the database the file with the newest timestamp is taken.
 
 
 
[[Category:Beginner]]
 

Latest revision as of 15:20, 25 July 2022

This page is part of the Getting Started Section. It introduces you to the standalone command-line mode of BaseX.

Startup[edit]

The command-line client can be started as follows:

  • Run one of the basex or basex.bat scripts.
  • If you have installed BaseX on Windows, click on the BaseX Standalone icon.

All operations will be performed with admin permissions (no password needs to be supplied). Various command-line options are available to simplify batch processing. The start script can be adjusted for individual purposes (e.g. if the default memory limit is too restrictive).

The standalone client must not be used if you perform parallel (concurrent) read and write operations on your databases. See Concurrent Operations for more details.

Operations[edit]

Create a Database[edit]

To create a database, you need an XML document, e.g., factbook.xml. Save this document to your working directory and type in the following command to create and open the database: > CREATE DB factbook factbook.xml

factbook is the name of the database
factbook.xml is the initial input of the database

By default, databases are stored in the basex/data directory of your project’s home directory. Depending on your Configuration, the location may vary.

Execute a Query[edit]

The Template:Commands command lets you run a query. The following query returns all country elements of the currently opened database:

> XQUERY //country

You can also run queries in files:

> RUN /path/to/query.xq

Database Commands[edit]

The following command lists all databases that can be opened by the currently logged-in user:

> LIST

To open an existing database, execute the following:

> OPEN factbook

To get information on the currently opened database, type:

> INFO

You can also address a database within your query with the db:get function:

> XQUERY db:get("factbook")//country

To close the current database, please type:

> CLOSE

A database can eventually be dropped again:

> DROP DB factbook

Multiple Resources[edit]

One database can contain not only a single, but millions of documents. All documents can have a different structure.

With the following commands, you can create an empty database and add two documents. It is also possible to address resources via URLs:

> CREATE DB store
> ADD factbook.xml
> ADD http://files.basex.org/xml/xmark.xml

Deleting a document from a database is easy, but make sure that the database, which contains the addressed document, is currently opened:

> DELETE factbook.xml

Backup and Restore[edit]

To back up and restore your database, type:

> CREATE BACKUP factbook
> RESTORE factbook

The backup file is stored in the database directory. It contains the name of the database and a timestamp: [db-name]-[timestamp].zip. If a database is to be restored, and if several backups exist, the backup with the newest timestamp is taken.