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70 lines
2.0 KiB
ReStructuredText
70 lines
2.0 KiB
ReStructuredText
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.. _sql-tab:
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SQLite Tables Reference
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=======================
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In addition to the tables generated for each log format, **lnav** includes
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the following tables:
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* environ
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* lnav_views
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* all_logs
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* http_status_codes
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These extra tables provide useful information and can let you manipulate
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**lnav**'s internal state. You can get a dump of the entire database schema
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by executing the '.schema' SQL command, like so::
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;.schema
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environ
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-------
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The **environ** table gives you access to the **lnav** process' environment
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variables. You can SELECT, INSERT, and UPDATE environment variables, like
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so::
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;SELECT * FROM environ WHERE name = 'SHELL'
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name value
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SHELL /bin/tcsh
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;UPDATE environ SET value = '/bin/sh' WHERE name = 'SHELL'
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Environment variables can be used to store simple values or pass values
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from **lnav**'s SQL environment to **lnav**'s commands. For example, the
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"open" command will do variable substitution, so you can insert a variable
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named "FILENAME" and then open it in **lnav** by referencing it with
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"$FILENAME"::
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;INSERT INTO environ VALUES ('FILENAME', '/path/to/file')
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:open $FILENAME
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lnav_views
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----------
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The **lnav_views** table allows you to SELECT and UPDATE information related
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to **lnav**'s "views" (e.g. log, text, ...). The following columns are
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available in this table:
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:name: The name of the view.
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:top: The line number at the top of the view. This value can be UPDATEd to
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move the view to the given line.
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:left: The left-most column number to display. This value can be UPDATEd to
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move the view left or right.
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:height: The number of lines that are displayed on the screen.
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:inner_height: The number of lines of content being displayed.
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all_logs
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--------
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The **all_logs** table lets you query the format derived from the **lnav**
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log message parser that is used to automatically extract data, see
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:ref:`data-ext` for more details.
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http_status_codes
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-----------------
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The **http_status_codes** table is a handy reference that can be used to turn
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HTTP status codes into human-readable messages.
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