ValueNull

java.lang.Object
- org.h2.value.Value
- - org.h2.value.ValueNull

```
public class ValueNull
extends Value
```
Implementation of NULL. NULL is not a regular data type.

Nested Class Summary
- Nested classes/interfaces inherited from class org.h2.value.Value
  Value.ValueBlob, Value.ValueClob

Field Summary

Fields
Modifier and Type	Field and Description
`static ValueNull`	`DELETED` This special instance is used as a marker for deleted entries in a map.
`static ValueNull`	`INSTANCE` The main NULL instance.

Fields inherited from class org.h2.value.Value
ARRAY, BLOB, BOOLEAN, BYTE, BYTES, CLOB, DATE, DECIMAL, DOUBLE, ENUM, FLOAT, GEOMETRY, INT, JAVA_OBJECT, LONG, NULL, RESULT_SET, SHORT, STRING, STRING_FIXED, STRING_IGNORECASE, TIME, TIMESTAMP, TIMESTAMP_TZ, TYPE_COUNT, UNKNOWN, UUID

Method Summary

Methods
Modifier and Type	Method and Description
`protected int`	`compareSecure(Value v, CompareMode mode)` Compare the value with another value of the same type.
`Value`	`convertTo(int type)` Compare a value to the specified type.
`boolean`	`equals(java.lang.Object other)` Check if the two values have the same hash code.
`java.math.BigDecimal`	`getBigDecimal()`
`java.lang.Boolean`	`getBoolean()`
`byte`	`getByte()`
`byte[]`	`getBytes()`
`java.sql.Date`	`getDate()`
`int`	`getDisplaySize()` Get the display size in characters.
`double`	`getDouble()`
`float`	`getFloat()`
`java.io.InputStream`	`getInputStream()`
`int`	`getInt()`
`long`	`getLong()`
`java.lang.Object`	`getObject()` Get the value as an object.
`long`	`getPrecision()` Get the precision.
`java.io.Reader`	`getReader()`
`short`	`getShort()`
`java.lang.String`	`getSQL()` Get the SQL expression for this value.
`java.lang.String`	`getString()` Get the value as a string.
`java.sql.Time`	`getTime()`
`java.sql.Timestamp`	`getTimestamp()`
`int`	`getType()` Get the value type.
`int`	`hashCode()`
`void`	`set(java.sql.PreparedStatement prep, int parameterIndex)` Set the value as a parameter in a prepared statement.

Methods inherited from class org.h2.value.Value
add, checkPrecision, clearCache, compareTo, compareTypeSafe, convertPrecision, convertScale, copy, copyToResult, copyToTemp, divide, getBytesNoCopy, getDataHandler, getHigherOrder, getMemory, getResultSet, getScale, getSignum, getSmall, getTableId, getTraceSQL, isLinkedToTable, modulus, multiply, negate, remove, subtract, throwUnsupportedExceptionForType, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - INSTANCE
```
public static final ValueNull INSTANCE
```
    The main NULL instance.
  - DELETED
```
public static final ValueNull DELETED
```
    This special instance is used as a marker for deleted entries in a map. It should not be used anywhere else.
- Method Detail
  - getSQL
```
public java.lang.String getSQL()
```
    Description copied from class: Value
    
    Get the SQL expression for this value.
    
    Specified by:
    
    getSQL in class Value
    
    Returns:
    the SQL expression
  - getType
```
public int getType()
```
    Description copied from class: Value
    
    Get the value type.
    
    Specified by:
    
    getType in class Value
    
    Returns:
    the type
  - getString
```
public java.lang.String getString()
```
    Description copied from class: Value
    
    Get the value as a string.
    
    Specified by:
    
    getString in class Value
    
    Returns:
    the string
  - getBoolean
```
public java.lang.Boolean getBoolean()
```
    Overrides:
    
    getBoolean in class Value
  - getDate
```
public java.sql.Date getDate()
```
    Overrides:
    
    getDate in class Value
  - getTime
```
public java.sql.Time getTime()
```
    Overrides:
    
    getTime in class Value
  - getTimestamp
```
public java.sql.Timestamp getTimestamp()
```
    Overrides:
    
    getTimestamp in class Value
  - getBytes
```
public byte[] getBytes()
```
    Overrides:
    
    getBytes in class Value
  - getByte
```
public byte getByte()
```
    Overrides:
    
    getByte in class Value
  - getShort
```
public short getShort()
```
    Overrides:
    
    getShort in class Value
  - getBigDecimal
```
public java.math.BigDecimal getBigDecimal()
```
    Overrides:
    
    getBigDecimal in class Value
  - getDouble
```
public double getDouble()
```
    Overrides:
    
    getDouble in class Value
  - getFloat
```
public float getFloat()
```
    Overrides:
    
    getFloat in class Value
  - getInt
```
public int getInt()
```
    Overrides:
    
    getInt in class Value
  - getLong
```
public long getLong()
```
    Overrides:
    
    getLong in class Value
  - getInputStream
```
public java.io.InputStream getInputStream()
```
    Overrides:
    
    getInputStream in class Value
  - getReader
```
public java.io.Reader getReader()
```
    Overrides:
    
    getReader in class Value
  - convertTo
```
public Value convertTo(int type)
```
    Description copied from class: Value
    
    Compare a value to the specified type.
    
    Overrides:
    
    convertTo in class Value
    
    Parameters:
    type - the type of the returned value
    
    Returns:
    the converted value
  - compareSecure
```
protected int compareSecure(Value v,
                CompareMode mode)
```
    Description copied from class: Value
    
    Compare the value with another value of the same type.
    
    Specified by:
    
    compareSecure in class Value
    
    Parameters:
    v - the other value
    mode - the compare mode
    
    Returns:
    0 if both values are equal, -1 if the other value is smaller, and 1 otherwise
  - getPrecision
```
public long getPrecision()
```
    Description copied from class: Value
    
    Get the precision.
    
    Specified by:
    
    getPrecision in class Value
    
    Returns:
    the precision
  - hashCode
```
public int hashCode()
```
    Specified by:
    
    hashCode in class Value
  - getObject
```
public java.lang.Object getObject()
```
    Description copied from class: Value
    
    Get the value as an object.
    
    Specified by:
    
    getObject in class Value
    
    Returns:
    the object
  - set
```
public void set(java.sql.PreparedStatement prep,
       int parameterIndex)
         throws java.sql.SQLException
```
    Description copied from class: Value
    
    Set the value as a parameter in a prepared statement.
    
    Specified by:
    
    set in class Value
    
    Parameters:
    prep - the prepared statement
    parameterIndex - the parameter index
    
    Throws:
    
    java.sql.SQLException
  - getDisplaySize
```
public int getDisplaySize()
```
    Description copied from class: Value
    
    Get the display size in characters.
    
    Specified by:
    
    getDisplaySize in class Value
    
    Returns:
    the display size
  - equals
```
public boolean equals(java.lang.Object other)
```
    Description copied from class: Value
    
    Check if the two values have the same hash code. No data conversion is made; this method returns false if the other object is not of the same class. For some values, compareTo may return 0 even if equals return false. Example: ValueDecimal 0.0 and 0.00.
    
    Specified by:
    
    equals in class Value
    
    Parameters:
    other - the other value
    
    Returns:
    true if they are equal

Class ValueNull

Nested Class Summary

Nested classes/interfaces inherited from class org.h2.value.Value

Field Summary

Fields inherited from class org.h2.value.Value

Method Summary

Methods inherited from class org.h2.value.Value

Methods inherited from class java.lang.Object

Field Detail

INSTANCE

DELETED

Method Detail

getSQL

getType

getString

getBoolean

getDate

getTime

getTimestamp

getBytes

getByte

getShort

getBigDecimal

getDouble

getFloat

getInt

getLong

getInputStream

getReader

convertTo

compareSecure

getPrecision

hashCode

getObject

set

getDisplaySize

equals