Apache Derby - Strumenti
Apache Derby fornisce strumenti come sysinfo, ij e, dblook.
strumento sysinfo
Utilizzando questo strumento, è possibile ottenere informazioni sull'ambiente Java e Derby.
Sfoglia la cartella bin della directory di installazione di Derby ed esegui il comando sysinfo come mostrato di seguito -
C:\Users\MY_USER>cd %DERBY_HOME%/bin
C:\Derby\bin>sysinfoDurante l'esecuzione, fornisce informazioni di sistema su java e derby come indicato di seguito:
------------------ Java Information ------------------
Java Version: 1.8.0_101
Java Vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.8.0_101\jre
Java classpath: C:\Users\Tutorialspoint\Google
Drive\Office\Derby\derby_zip\New folder\db-derby-10.12.1.1-
bin\lib;C:\EXAMPLES_\Task\jars\*;C:\EXAMPLES\jars\mysql-connector-java-5.1.40-
bin.jar;C:\Users\Tutorialspoint\Google Drive\Office\37.Junit
Update\jars;C:\Program Files\Apache Software Foundation\Tomcat
8.5\lib\*;C:\Derby\lib\derby.jar;C:\Derby\lib\derbyclient.jar;C:\Derby\lib\derb
yLocale_cs.jar;C:\Derby\lib\derbyLocale_de_DE.jar;C:\Derby\lib\derbyLocale_es.j
ar;C:\Derby\lib\derbyLocale_fr.jar;C:\Derby\lib\derbyLocale_hu.jar;C:\Derby\lib
\derbyLocale_it.jar;C:\Derby\lib\derbyLocale_ja_JP.jar;C:\Derby\lib\derbyLocale
_ko_KR.jar;C:\Derby\lib\derbyLocale_pl.jar;C:\Derby\lib\derbyLocale_pt_BR.jar;C
:\Derby\lib\derbyLocale_ru.jar;C:\Derby\lib\derbyLocale_zh_CN.jar;C:\Derby\lib\
derbyLocale_zh_TW.jar;C:\Derby\lib\derbynet.jar;C:\Derby\lib\derbyoptionaltools
.jar;C:\Derby\lib\derbyrun.jar;C:\Derby\lib\derbytools.jar;;C:\Derby/lib/derby.
jar;C:\Derby/lib/derbynet.jar;C:\Derby/lib/derbyclient.jar;C:\Derby/lib/derbyto
ols.jar;C:\Derby/lib/derbyoptionaltools.jar
OS name: Windows 10
OS architecture: amd64
OS version: 10.0
Java user name: Tutorialspoint
Java user home: C:\Users\Tutorialspoint
Java user dir: C:\Derby\bin
java.specification.name: Java Platform API Specification
java.specification.version: 1.8
java.runtime.version: 1.8.0_101-b13
--------- Derby Information --------
[C:\Derby\lib\derby.jar] 10.14.2.0 - (1828579)
[C:\Derby\lib\derbytools.jar] 10.14.2.0 - (1828579)
[C:\Derby\lib\derbynet.jar] 10.14.2.0 - (1828579)
[C:\Derby\lib\derbyclient.jar] 10.14.2.0 - (1828579)
[C:\Derby\lib\derbyoptionaltools.jar] 10.14.2.0 - (1828579)
------------------------------------------------------
----------------- Locale Information -----------------
Current Locale : [English/United States [en_US]]
Found support for locale: [cs]
version: 10.14.2.0 - (1828579)
Found support for locale: [de_DE]
version: 10.14.2.0 - (1828579)
Found support for locale: [es]
version: 10.14.2.0 - (1828579)
Found support for locale: [fr]
version: 10.14.2.0 - (1828579)
Found support for locale: [hu]
version: 10.14.2.0 - (1828579)
Found support for locale: [it]
version: 10.14.2.0 - (1828579)
Found support for locale: [ja_JP]
version: 10.14.2.0 - (1828579)
Found support for locale: [ko_KR]
version: 10.14.2.0 - (1828579)
Found support for locale: [pl]
version: 10.14.2.0 - (1828579)
Found support for locale: [pt_BR]
version: 10.14.2.0 - (1828579)
Found support for locale: [ru]
version: 10.14.2.0 - (1828579)
Found support for locale: [zh_CN]
version: 10.14.2.0 - (1828579)
Found support for locale: [zh_TW]
version: 10.14.2.0 - (1828579)
------------------------------------------------------
------------------------------------------------------ijtool
Usando questo strumento, puoi eseguire script e query di apache Derby.
Sfoglia la cartella bin della directory di installazione di Derby ed esegui il comando ij come mostrato di seguito -
C:\Users\MY_USER>cd %DERBY_HOME%/bin
C:\Derby\bin>ijQuesto ti darà ij shell dove puoi eseguire il comando e gli script derby, come mostrato di seguito -
ij version 10.14
ij>Utilizzando help comando, puoi ottenere l'elenco dei comandi supportati da questa shell.
C:\Derby\bin>cd %DERBY_HOME%/bin
C:\Derby\bin>ij
ij version 10.14
ij> help;
Supported commands include:
PROTOCOL 'JDBC protocol' [ AS ident ];
-- sets a default or named protocol
DRIVER 'class for driver'; -- loads the named class
CONNECT 'url for database' [ PROTOCOL namedProtocol ] [ AS connectionName ];
-- connects to database URL
-- and may assign identifier
SET CONNECTION connectionName; -- switches to the specified connection
SHOW CONNECTIONS; -- lists all connections
AUTOCOMMIT [ ON | OFF ]; -- sets autocommit mode for the connection
DISCONNECT [ CURRENT | connectionName | ALL ];
-- drop current, named, or all connections;
-- the default is CURRENT
SHOW SCHEMAS; -- lists all schemas in the current database
SHOW [ TABLES | VIEWS | PROCEDURES | FUNCTIONS | SYNONYMS ] { IN schema };
-- lists tables, views, procedures, functions or
synonyms
SHOW INDEXES { IN schema | FROM table };
-- lists indexes in a schema, or for a table
SHOW ROLES; -- lists all defined roles in the database,
sorted
SHOW ENABLED_ROLES; -- lists the enabled roles for the current
-- connection (to see current role use
-- VALUES CURRENT_ROLE), sorted
SHOW SETTABLE_ROLES; -- lists the roles which can be set for the
-- current connection, sorted
DESCRIBE name; -- lists columns in the named table
COMMIT; -- commits the current transaction
ROLLBACK; -- rolls back the current transaction
PREPARE name AS 'SQL-J text'; -- prepares the SQL-J text
EXECUTE { name | 'SQL-J text' } [ USING { name | 'SQL-J text' } ] ;
-- executes the statement with parameter
-- values from the USING result set row
REMOVE name; -- removes the named previously prepared
statement
RUN 'filename'; -- run commands from the named file
ELAPSEDTIME [ ON | OFF ]; -- sets elapsed time mode for ij
MAXIMUMDISPLAYWIDTH integerValue;
-- sets the maximum display width for
-- each column to integerValue
ASYNC name 'SQL-J text'; -- run the command in another thread
WAIT FOR name; -- wait for result of ASYNC'd command
HOLDFORCONNECTION; -- sets holdability for a connection to HOLD
-- (i.e. ResultSet.HOLD_CURSORS_OVER_COMMIT)
NOHOLDFORCONNECTION; -- sets holdability for a connection to NO HOLD
-- (i.e. ResultSet.CLOSE_CURSORS_AT_COMMIT)
GET [SCROLL INSENSITIVE] [WITH { HOLD | NOHOLD }] CURSOR name AS 'SQL-J
query';
-- gets a cursor (JDBC result set) on the query
-- the default is a forward-only cursor with
holdability
NEXT name; -- gets the next row from the named cursor
FIRST name; -- gets the first row from the named scroll
cursor
LAST name; -- gets the last row from the named scroll
cursor
PREVIOUS name; -- gets the previous row from the named scroll
cursor
ABSOLUTE integer name; -- positions the named scroll cursor at the
absolute row number
-- (A negative number denotes position from the
last row.)
RELATIVE integer name; -- positions the named scroll cursor relative to
the current row
-- (integer is number of rows)
AFTER LAST name; -- positions the named scroll cursor after the
last row
BEFORE FIRST name; -- positions the named scroll cursor before the
first row
GETCURRENTROWNUMBER name; -- returns the row number for the current
position of the named scroll cursor
-- (0 is returned when the cursor is not
positioned on a row.)
CLOSE name; -- closes the named cursor
LOCALIZEDDISPLAY [ ON | OFF ];
-- controls locale sensitive data representation
EXIT; -- exits ij
HELP; -- shows this message
Any unrecognized commands are treated as potential SQL-J commands and executed
directly.dblooktool
Questo strumento viene utilizzato per generare il linguaggio di definizione dei dati.
Sfoglia la cartella bin della directory di installazione di Derby ed esegui il file dblook comando come mostrato di seguito -
C:\Users\MY_USER>cd %DERBY_HOME%/bin
C:\Derby\bin>dblook -d myURLDove, myURL è l'URL di connessione del database per il quale è necessario generare DDL.