Quadcap Embeddable Database

com.quadcap.sql.DropColumn Class Reference

Inheritance diagram for com.quadcap.sql.DropColumn:

List of all members.

---

Detailed Description

Log step to add a column to a table, supplying default values as necessary.

Author:

Stan Bailes

Definition at line 75 of file DropColumn.java.

Public Member Functions
	DropColumn ()
	Default constructor.
	DropColumn (Session session, Table table, Column column)
	Explicit constructor from table and column.
void	redo (Session session) throws IOException, SQLException
	LogStep.redo(), our job is to remove the column definition from the schema.
void	undo (Session session) throws IOException, SQLException
	LogStep.undo(), our job is to update the table's definition to include the new column.
void	prepare (Session session) throws IOException, SQLException
	I'm ready.
void	readExternal (ObjectInput in) throws IOException, ClassNotFoundException
	Read me from a stream.
void	writeExternal (ObjectOutput out) throws IOException
	Write me to a stream.
String	toString ()
	Return a string representation for display/debugging purposes.
void	setExtern (Extern extern)
Extern	getExtern ()
Package Functions
Table	getTable (Database db) throws IOException
	Lazy table accessor.
Package Attributes
transient Table	table
Column	column
String	tableName = null
Static Package Attributes
Extern	extern
	My class's Extern object (see com.quadcap.sql.io.Extern).

---

Constructor & Destructor Documentation

com.quadcap.sql.DropColumn.DropColumn (   )

Default constructor. Definition at line 84 of file DropColumn.java.

com.quadcap.sql.DropColumn.DropColumn (  Session  session, Table  table, Column  column )

Explicit constructor from table and column. Definition at line 89 of file DropColumn.java. References com.quadcap.sql.TupleImpl.getName().

---

Member Function Documentation

Extern com.quadcap.sql.DropColumn.getExtern (   )

Definition at line 174 of file DropColumn.java.

Table com.quadcap.sql.DropColumn.getTable (  Database  db  )  throws IOException [package]

Lazy table accessor. Definition at line 99 of file DropColumn.java. References com.quadcap.sql.DropColumn.getTable(), com.quadcap.sql.DropColumn.table, and com.quadcap.sql.DropColumn.tableName. Referenced by com.quadcap.sql.DropColumn.getTable().

void com.quadcap.sql.DropColumn.prepare (  Session  session  )  throws IOException, SQLException

I'm ready. Reimplemented from com.quadcap.sql.LogStep. Definition at line 132 of file DropColumn.java. References com.quadcap.sql.DropColumn.prepare(). Referenced by com.quadcap.sql.DropColumn.prepare().

void com.quadcap.sql.DropColumn.readExternal (  ObjectInput  in  )  throws IOException, ClassNotFoundException

Read me from a stream. Definition at line 138 of file DropColumn.java. References com.quadcap.sql.DropColumn.readExternal(). Referenced by com.quadcap.sql.DropColumn.readExternal().

void com.quadcap.sql.DropColumn.redo (  Session  session  )  throws IOException, SQLException [virtual]

LogStep.redo(), our job is to remove the column definition from the schema. Implements com.quadcap.sql.LogStep. Definition at line 110 of file DropColumn.java. References com.quadcap.sql.DropColumn.column, com.quadcap.sql.Table.deleteColumn(), com.quadcap.sql.Column.getColumn(), com.quadcap.sql.TupleImpl.getColumn(), com.quadcap.sql.Column.getName(), com.quadcap.sql.DropColumn.redo(), com.quadcap.sql.DropColumn.table, and com.quadcap.sql.Database.updateRelation(). Referenced by com.quadcap.sql.DropColumn.redo().

void com.quadcap.sql.DropColumn.setExtern (  Extern  extern  )

Definition at line 173 of file DropColumn.java. References com.quadcap.sql.DropColumn.setExtern(). Referenced by com.quadcap.sql.DropColumn.setExtern().

String com.quadcap.sql.DropColumn.toString (   )

Return a string representation for display/debugging purposes. Definition at line 159 of file DropColumn.java. References com.quadcap.sql.DropColumn.column, com.quadcap.sql.DropColumn.tableName, and com.quadcap.sql.Column.toString().

void com.quadcap.sql.DropColumn.undo (  Session  session  )  throws IOException, SQLException [virtual]

LogStep.undo(), our job is to update the table's definition to include the new column. Implements com.quadcap.sql.LogStep. Definition at line 122 of file DropColumn.java. References com.quadcap.sql.Table.addColumn(), com.quadcap.sql.DropColumn.column, com.quadcap.sql.Column.getColumn(), com.quadcap.sql.DropColumn.table, com.quadcap.sql.DropColumn.undo(), and com.quadcap.sql.Database.updateRelation(). Referenced by com.quadcap.sql.DropColumn.undo().

void com.quadcap.sql.DropColumn.writeExternal (  ObjectOutput  out  )  throws IOException

Write me to a stream. Definition at line 149 of file DropColumn.java. References com.quadcap.sql.DropColumn.column, com.quadcap.sql.DropColumn.tableName, and com.quadcap.sql.DropColumn.writeExternal(). Referenced by com.quadcap.sql.DropColumn.writeExternal().

---

Member Data Documentation

Column com.quadcap.sql.DropColumn.column [package]

Definition at line 78 of file DropColumn.java. Referenced by com.quadcap.sql.DropColumn.redo(), com.quadcap.sql.DropColumn.toString(), com.quadcap.sql.DropColumn.undo(), and com.quadcap.sql.DropColumn.writeExternal().

Extern com.quadcap.sql.DropColumn.extern [static, package]

My class's Extern object (see com.quadcap.sql.io.Extern). Definition at line 172 of file DropColumn.java.

transient Table com.quadcap.sql.DropColumn.table [package]

Definition at line 76 of file DropColumn.java. Referenced by com.quadcap.sql.DropColumn.getTable(), com.quadcap.sql.DropColumn.redo(), and com.quadcap.sql.DropColumn.undo().

String com.quadcap.sql.DropColumn.tableName = null [package]

Definition at line 79 of file DropColumn.java. Referenced by com.quadcap.sql.DropColumn.getTable(), com.quadcap.sql.DropColumn.toString(), and com.quadcap.sql.DropColumn.writeExternal().