Difference between revisions of "DISPLAY SCHEMAS"
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Revision as of 13:36, 23 October 2009
Purpose
Display the currently available databases
Syntax
DISPLAY SCHEMAS [TO FILE <.txt filename> | (<expC>)] | [TO PRINT]
See Also
ADATABASES(), ADD TABLE, ALTER INDEX, ALTER TABLE, BACKUP DATABASE, CLOSE DATABASES, CLOSE TABLES, COMPILE DATABASE, CREATE DATABASE, CREATE TABLE, CREATE INDEX, CREATE VIEW, DATABASE EVENTS, DATABASE(), DB_DATADIR, DB_MAXWKA, DB_PRINT, DBUSED(), DISPLAY DATABASE, DISPLAY INDEXES, DISPLAY STATUS, DISPLAY STRUCTURE, DISPLAY TABLES, DROP DATABASE, DROP INDEX, DROP TABLE, Function Keys, GETENV(), LIST DATABASE, LIST INDEXES, LIST SCHEMAS, LIST TABLES, LOCK TABLE, OPEN DATABASE, PACK DATABASE, REBUILD DATABASE, REINDEX DATABASE, RESTORE DATABASE, SET AUTOCATALOG, SET EXCLUSIVE, SET PAGELENGTH, SET PAGEWIDTH, SET PRINTER, USE
Description
The DISPLAY SCHEMAS command displays the currently available databases.
Databases in Recital are implemented as directories containing files that correspond to the tables and associated files in the database. Operating System file protection can be applied individually to the files for added security. The directories are sub-directories of the Recital data directory. The environment variable / symbol DB_DATADIR points to the current Recital data directory and can be queried using the GETENV() function. Files from other directories can be added to the database using the ADD TABLE command or via the database catalog and SET AUTOCATALOG functionality.
DISPLAY commands differ from LIST commands in that they pause every 17 lines until a key is pressed. You can cancel any further output at this point by pressing the [ABANDON] key. Where the output is sent to a file or printer, the pause is disabled.
| Keyword | Description |
|---|---|
| TO <file> | The display output will be sent to the specified file. The filename can be substituted with a <expC>, enclosed in round brackets, which returns a valid filename. If no file extension is specified, then ".txt" will be used. The command SET PAGELENGTH governs the output file pagination and SET PAGEWIDTH defines the width of each page. Page numbers are centered on the bottom of the page according to width. |
| TO PRINT | The display output will be sent to a printer. The TO PRINT option will default to a local printer unless the command SET PRINTER TO \\SPOOLER is issued. The print request will then be spooled to the system printer, which is defined by the environment variable DB_PRINT. |
Example
display schemas
Products
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
