org.apache.derby.impl.sql.catalog
Class SystemColumnImpl

java.lang.Object
  org.apache.derby.impl.sql.catalog.SystemColumnImpl

All Implemented Interfaces:

SystemColumn

public class SystemColumnImpl

extends java.lang.Object

implements SystemColumn

Implements the description of a column in a system table.

Version:

0.1

Author:

Rick Hillegas

Field Summary

private boolean	builtInType
private java.lang.String	dataType
private int	id
private int	maxLength
private java.lang.String	name
private boolean	nullability
private int	precision
private int	scale

Constructor Summary

SystemColumnImpl(java.lang.String name, int id, boolean nullability)
Constructor to create a description of a column in a system table.

SystemColumnImpl(java.lang.String name, int id, int precision, int scale, boolean nullability, java.lang.String dataType, boolean builtInType, int maxLength)
Constructor to create a description of a column in a system table.

Method Summary

boolean	builtInType() Is it a built-in type?
java.lang.String	getDataType() Gets the datatype of this column.
int	getID() Gets the id of this column.
int	getMaxLength() Gets the maximum length of this column.
java.lang.String	getName() Gets the name of this column.
boolean	getNullability() Gets the nullability of this column.
int	getPrecision() Gets the precision of this column.
int	getScale() Gets the scale of this column.

Methods inherited from class java.lang.Object

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

Field Detail

name

private java.lang.String name

id

private int id

precision

private int precision

scale

private int scale

nullability

private boolean nullability

dataType

private java.lang.String dataType

builtInType

private boolean builtInType

maxLength

private int maxLength

Constructor Detail

SystemColumnImpl

public SystemColumnImpl(java.lang.String name,
                        int id,
                        int precision,
                        int scale,
                        boolean nullability,
                        java.lang.String dataType,
                        boolean builtInType,
                        int maxLength)

Constructor to create a description of a column in a system table.

SystemColumnImpl

public SystemColumnImpl(java.lang.String name,
                        int id,
                        boolean nullability)

Constructor to create a description of a column in a system table. This constructor is used for SQL Identifiers (varchar 128).

Method Detail

getName

public java.lang.String getName()

Gets the name of this column.

Specified by:

getName in interface SystemColumn

Returns:

The column name.

getID

public int getID()

Gets the id of this column.

Specified by:

getID in interface SystemColumn

Returns:

The column id.

getPrecision

public int getPrecision()

Gets the precision of this column.

Specified by:

getPrecision in interface SystemColumn

Returns:

The precision of data stored in this column.

getScale

public int getScale()

Gets the scale of this column.

Specified by:

getScale in interface SystemColumn

Returns:

The scale of data stored in this column.

getNullability

public boolean getNullability()

Gets the nullability of this column.

Specified by:

getNullability in interface SystemColumn

Returns:

True if this column is nullable. False otherwise.

getDataType

public java.lang.String getDataType()

Gets the datatype of this column.

Specified by:

getDataType in interface SystemColumn

Returns:

The datatype of this column.

builtInType

public boolean builtInType()

Is it a built-in type?

Specified by:

builtInType in interface SystemColumn

Returns:

True if it's a built-in type.

getMaxLength

public int getMaxLength()

Gets the maximum length of this column.

Specified by:

getMaxLength in interface SystemColumn

Returns:

The maximum length of data stored in this column.