Derby 工具
Apache Derby 为您提供了诸如
sysinfo、ij 和
dblook 之类的工具。
系统信息工具
使用此工具,您可以获得有关 Java 和 Derby 环境的信息。
浏览Derby安装目录的bin文件夹,执行sysinfo命令如下图-
C:\Users\MY_USER>cd %DERBY_HOME%/bin
C:\Derby\bin>sysinfo
在执行时,它会为您提供有关 java 和 derby 的系统信息,如下所示-
------------------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
使用此工具,您可以运行 apache Derby 的脚本和查询。
浏览Derby安装目录的bin文件夹,执行ij命令如下图-
C:\Users\MY_USER>cd %DERBY_HOME%/bin
C:\Derby\bin>ij
这将为您提供
ij shell,您可以在其中执行 derby 命令和脚本,如下所示-
使用
help命令,你可以得到这个shell支持的命令列表。
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
此工具用于生成数据定义语言。
浏览Derby安装目录的bin文件夹,执行
dblook命令如下图-
C:\Users\MY_USER>cd %DERBY_HOME%/bin
C:\Derby\bin>dblook-d myURL
其中,
myURL 是您需要为其生成 DDL 的数据库的连接 URL。