com.jdc.rdb.sql.ddl.drop
Class Impact

java.lang.Object
  |
  +--com.jdc.lang.Object
        |
        +--com.jdc.rdb.sql.SQLClause
              |
              +--com.jdc.rdb.sql.ddl.DDLClause
                    |
                    +--com.jdc.rdb.sql.ddl.drop.Impact

All Implemented Interfaces:

Clause, DropClause, Serializable

public class Impact

extends DDLClause

implements DropClause

Impact represents a Drop SQL statement impact clause. The impact clause specifies the impact of dropping a Table on other Database objects. Valid options are:

• CASCADE - Dropping a database object causes objects that depend upon it to be dropped as well.
• RESTRICT - The database object is not dropped if one or more dependent objects exist.

Reference:

IBM® DB2 Universal Database™ SQL Reference Volume 2 Version 8, Page 512.

Version:

2.0

Author:

Jay Damon

See Also:

Drop, Serialized Form

Field Summary

static String	CASCADE Dropping a database object causes objects that depend upon it to be dropped as well.
static String	RESTRICT The database object is not dropped if a one or more dependent objects exist.

Fields inherited from class com.jdc.lang.Object

string

Constructor Summary

Impact()
Constructs a new Impact clause object.

Impact(String option)
Constructs a new Impact clause object for the specified impact option.

Method Summary

String	getValue() Returns the Impact clause value.
Impact	setCascade() Sets the Impact clause to drop all database objects that depend upon the object to be dropped
Impact	setRestrict() Sets the Impact clause to not drop the database object if one or more dependent objects exist.
String	toString() Returns a String representation of this Impact clause.

Methods inherited from class com.jdc.rdb.sql.ddl.DDLClause

getKeyword

Methods inherited from class com.jdc.rdb.sql.SQLClause

contains, getKeyword, setKeyword, setValue

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

CASCADE

public static final String CASCADE

Dropping a database object causes objects that depend upon it to be dropped as well.

See Also:

Constant Field Values

RESTRICT

public static final String RESTRICT

The database object is not dropped if a one or more dependent objects exist.

See Also:

Constant Field Values

Constructor Detail

Impact

public Impact()

Constructs a new Impact clause object.

Impact

public Impact(String option)

Constructs a new Impact clause object for the specified impact option. Valid options are CASCADE or RESTRICT.

Throws:

SQLInvalidException - An invalid impact option is specified.

See Also:

setCascade(), setRestrict()

Method Detail

getValue

public String getValue()

Returns the Impact clause value.

Overrides:

getValue in class SQLClause

Returns:

The Impact clause value.

setCascade

public Impact setCascade()

Sets the Impact clause to drop all database objects that depend upon the object to be dropped

Returns:

This Impact clause object.

See Also:

setRestrict

setRestrict

public Impact setRestrict()

Sets the Impact clause to not drop the database object if one or more dependent objects exist.

Returns:

This Impact clause object.

See Also:

setCascade

toString

public String toString()

Returns a String representation of this Impact clause.

Specified by:

toString in interface DropClause

Overrides:

toString in class SQLClause

Returns:

A String representation of this Impact clause.