Difference between revisions of "Command-Line Client"

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<p>BaseX offers a standalone console mode from which all [[Commands|database commands]] can be executed. As first operations you can do the same
+
This page is part of the [[Getting Started]] Section.
as described in the [[BaseX_Server#First_Operations|first operations]] sections for client-server mode on a local basis.</p>
+
It introduces you to the standalone command-line mode of BaseX.
 
==Startup==
 
  
see the [[Startup Overview]].
+
=Startup=
  
==Working with the BaseX Console==
+
The command-line client can be started as follows:
 
<p>After starting the BaseX Console you can type in <code>help</code> to get a list of all
 
[[Commands|BaseX commands]]. Several commands can be separated by semicolons.</p>
 
 
<p>
 
To evaluate commands without entering the console mode, you can use the
 
<code>-c</code> option on the command line:
 
</p>
 
 
<pre>
 
basex -Vc "create db input input.xml; xquery /"
 
  
Database 'input' created in 53.64 ms.
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* Run one of the {{Code|basex}} or {{Code|basex.bat}} scripts.
<html>
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* If you have installed BaseX on ''Windows'', click on the '''BaseX Standalone''' icon.
  <!-- Header -->
 
  <head id="0">
 
    <title>XML</title>
 
  </head>
 
  <!-- Body -->
 
  <body id="1" bgcolor="#FFFFFF" text="#000000" link="#0000CC">
 
    <h1>Databases &amp; XML</h1>
 
    <div align="right">
 
      <b>Assignments</b>
 
      <ul>
 
        <li>Exercise 1</li>
 
        <li>Exercise 2</li>
 
      </ul>
 
    </div>
 
  </body>
 
  <?pi bogus?>
 
</html>
 
  
Query: /
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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).
  
Compiling:
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Please note that 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.
  
Result: root()
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=Operations=
  
Parsing: 0.19 ms
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==Create a Database==
Compiling: 9.27 ms
 
Evaluating: 0.33 ms
 
Printing: 3.08 ms
 
Total Time: 12.88 ms
 
Results: 1 Item
 
Updated: 0 Items
 
Printed: 375 Bytes
 
Memory: 5834 KB
 
  
Query executed in 13.25 ms.
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* To create a database you need an XML document, e.g. [https://files.basex.org/xml/factbook.xml factbook.xml].
</pre>
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* Save this document to your working directory.
 +
* Type in the following command to create and open the database:
 +
<code>
 +
> [[Commands#CREATE DB|CREATE DB]] factbook factbook.xml
 +
</code>
  
==See also ==
+
: '''factbook''' is the name of the database <br/>
[[GUI Tutorial]], [[Server Tutorial]], [[Getting Started]]
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: '''factbook.xml''' is the initial input of the database<br/>
[[Category:Beginner]]
+
 
 +
; Where is the database stored?
 +
 
 +
By default, databases are stored in the <code>basex/data</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.
 +
 
 +
==Execute a Query==
 +
 
 +
The [[Commands#XQUERY|XQUERY]] command lets you run a query.
 +
* For example, the following query returns all country nodes in the currently opened factbook database.
 +
<code>
 +
> [[Commands#XQUERY|XQUERY]] //country
 +
</code>
 +
 
 +
* You can also run queries in files:
 +
<code>
 +
> [[Commands#RUN|RUN]] /Users/John/query.xq
 +
</code>
 +
 
 +
==Database Commands==
 +
 
 +
* The following command lists all databases than can be opened by the currently logged in user:
 +
<code>
 +
> [[Commands#LIST|LIST]]
 +
</code>
 +
 
 +
* To open an existing database, execute the following:
 +
<code>
 +
> [[Commands#OPEN|OPEN]] factbook
 +
</code>
 +
 
 +
* To get information on the currently opened database, type:
 +
<code>
 +
> [[Commands#INFO|INFO]]
 +
</code>
 +
 
 +
* You can also address a database within your query with the [[Database Module#db:open|db:open]] function:
 +
<code>
 +
> [[Commands#XQUERY|XQUERY]] db:open("factbook")//country
 +
</code>
 +
 
 +
* To [[Commands|close]] the current database, please type:
 +
<code>
 +
> [[Commands#CLOSE|CLOSE]]
 +
</code>
 +
 
 +
* Use the [[Commands#DROP DB|DROP DB]] command to delete a database:
 +
<code>
 +
> [[Commands#DROP DB|DROP DB]] factbook
 +
</code>
 +
 
 +
==Multiple Resources==
 +
 
 +
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:
 +
 
 +
<code>
 +
> [[Commands#CREATE DB|CREATE DB]] store
 +
</code><br/>
 +
<code>
 +
> [[Commands#ADD|ADD]] factbook.xml
 +
</code><br/>
 +
<code>
 +
> [[Commands#ADD|ADD]] http://files.basex.org/xml/xmark.xml
 +
</code>
 +
 
 +
* Deleting a document from a database is easy, but make sure that the database, which contains the addressed document, is currently opened:
 +
<code>
 +
> [[Commands#DELETE|DELETE]] factbook.xml
 +
</code>
 +
 
 +
==Backup and Restore==
 +
 
 +
* To backup your database, type:
 +
<code>
 +
> [[Commands#CREATE BACKUP|CREATE BACKUP]] factbook
 +
</code>
 +
 
 +
* To restore your database, type:
 +
<code>
 +
> [[Commands#RESTORE|RESTORE]] factbook
 +
</code>
 +
 
 +
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.

Revision as of 11:46, 2 July 2020

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

Startup

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.

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).

Please note that 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

Create a Database

  • To create a database you need an XML document, e.g. factbook.xml.
  • Save this document to your working directory.
  • 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
Where is the database stored?

By default, databases are stored in the basex/data 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 /Users/John, if your name is John.

Execute a Query

The XQUERY command lets you run a query.

  • For example, the following query returns all country nodes in the currently opened factbook database.

> XQUERY //country

  • You can also run queries in files:

> RUN /Users/John/query.xq

Database Commands

  • The following command lists all databases than 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:open function:

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

  • To close the current database, please type:

> CLOSE

  • Use the DROP DB command to delete a database:

> DROP DB factbook

Multiple Resources

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

  • To backup your database, type:

> CREATE BACKUP factbook

  • To restore your database, type:

> 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.