SQLSmallint

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org.apache.derby.iapi.types
Class SQLSmallint

java.lang.Object
  org.apache.derby.iapi.types.DataType
      org.apache.derby.iapi.types.NumberDataType
          org.apache.derby.iapi.types.SQLSmallint

All Implemented Interfaces:: CloneableObject, DataValueDescriptor, java.io.Externalizable, org.apache.derby.iapi.services.io.Formatable, NumberDataValue, Orderable, java.io.Serializable, org.apache.derby.iapi.services.io.Storable, org.apache.derby.iapi.services.io.TypedFormat

public final class SQLSmallint
extends NumberDataType

SQLSmallint satisfies the DataValueDescriptor interfaces (i.e., OrderableDataType). It implements a smallint column, e.g. for storing a column value; it can be specified when constructed to not allow nulls. Nullability cannot be changed after construction, as it affects the storage size and mechanism.

Because OrderableDataType is a subtype of ValueColumn, SQLSmallint can play a role in either a ValueColumn/Row or a OrderableDataType/Row, interchangeably.

We assume the store has a flag for nullness of the value, and simply return a 0-length array for the stored form when the value is null.

PERFORMANCE: There are likely alot of performance improvements possible for this implementation -- it new's Short more than it probably wants to.

Field Summary

private static int BASE_MEMORY_USAGE


private boolean isnull


(package private) static int SMALLINT_LENGTH


private short value


Fields inherited from class org.apache.derby.iapi.types.NumberDataType

MAXLONG_PLUS_ONE, MINLONG_MINUS_ONE, ZERO_DECIMAL

Fields inherited from interface org.apache.derby.iapi.types.NumberDataValue

MAX_DECIMAL_PRECISION_SCALE, MIN_DECIMAL_DIVIDE_SCALE

Fields inherited from interface org.apache.derby.iapi.types.Orderable

ORDER_OP_EQUALS, ORDER_OP_GREATEROREQUALS, ORDER_OP_GREATERTHAN, ORDER_OP_LESSOREQUALS, ORDER_OP_LESSTHAN

Constructor Summary

SQLSmallint()
          No-arg constructor, required by Formattable.

SQLSmallint(short val)


SQLSmallint(short val, boolean isnull)


Method Summary

BooleanDataValue equals(DataValueDescriptor left, DataValueDescriptor right)
          The = operator as called from the language module, as opposed to the storage module.

int estimateMemoryUsage()
          Estimate the memory usage in bytes of the data value and the overhead of the class.

boolean getBoolean()
          Gets the value in the data value descriptor as a boolean.

byte getByte()
          Gets the value in the data value descriptor as a byte.

DataValueDescriptor getClone()
          Clone this DataValueDescriptor.

double getDouble()
          Gets the value in the data value descriptor as a double.

float getFloat()
          Gets the value in the data value descriptor as a float.

int getInt()
          Gets the value in the data value descriptor as an int.

int getLength()
          Gets the length of the data value.

long getLong()
          Gets the value in the data value descriptor as a long.

DataValueDescriptor getNewNull()
          Get a new null value of the same type as this data value.

java.lang.Object getObject()
          Gets the value in the data value descriptor as a Java Object.

short getShort()
          Gets the value in the data value descriptor as a short.

java.lang.String getString()
          Gets the value in the data value descriptor as a String.

int getTypeFormatId()
          Return my format identifier.

java.lang.String getTypeName()
          Get the SQL name of the datatype

BooleanDataValue greaterOrEquals(DataValueDescriptor left, DataValueDescriptor right)
          The >= operator as called from the language module, as opposed to the storage module.

BooleanDataValue greaterThan(DataValueDescriptor left, DataValueDescriptor right)
          The > operator as called from the language module, as opposed to the storage module.

int hashCode()
          Get a value that represents this Object, as uniquely as possible within the confines of an int.

protected boolean isNegative()
          This method implements the isNegative method.

boolean isNull()
          always false for non-nullable columns

BooleanDataValue lessOrEquals(DataValueDescriptor left, DataValueDescriptor right)
          The <= operator as called from the language module, as opposed to the storage module.

BooleanDataValue lessThan(DataValueDescriptor left, DataValueDescriptor right)
          The < operator as called from the language module, as opposed to the storage module.

NumberDataValue minus(NumberDataValue result)
          This method implements the unary minus operator for smallint.

NumberDataValue mod(NumberDataValue dividend, NumberDataValue divisor, NumberDataValue result)
          mod(smallint, smallint)

BooleanDataValue notEquals(DataValueDescriptor left, DataValueDescriptor right)
          The <> operator as called from the language module, as opposed to the storage module.

void readExternal(java.io.ObjectInput in)
          This method restores an object's state by reading in the instance data for the object from the passed in stream.

void readExternalFromArray(org.apache.derby.iapi.services.io.ArrayInputStream in)
          Read the DataValueDescriptor from the stream.

void restoreToNull()
          Restore this object to its (SQL)null value.

protected void setFrom(DataValueDescriptor theValue)


void setInto(java.sql.PreparedStatement ps, int position)
          Set the value into a PreparedStatement.

void setInto(java.sql.ResultSet rs, int position)
          Set this value into a ResultSet for a subsequent ResultSet.insertRow or ResultSet.updateRow.

void setValue(boolean theValue)
          Set the value.

void setValue(byte theValue)
          Common code to handle converting a byte to this value by using the int to this value conversion.

void setValue(double theValue)
          Set the value of this DataValueDescriptor to the given double value

void setValue(float theValue)
          Set the value of this DataValueDescriptor to the given double value

void setValue(int theValue)
          Set the value of this DataValueDescriptor to the given int value

void setValue(long theValue)
          Set the value of this DataValueDescriptor to the given long value

void setValue(java.lang.Object theValue)
          Set the value of this DataValueDescriptor to the given value

void setValue(short theValue)
          Common code to handle converting a short to this value by using the int to this value conversion.

void setValue(java.lang.String theValue)
          Set the value of this DataValueDescriptor.

void setValueFromResultSet(java.sql.ResultSet resultSet, int colNumber, boolean isNullable)
          Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.

NumberDataValue times(NumberDataValue left, NumberDataValue right, NumberDataValue result)
          This method implements the * operator for "smallint * smallint".

java.lang.String toString()
          Convert this Object to a human-readable String.

protected int typeCompare(DataValueDescriptor arg)
          Compare this (not null) to a non-null value.

int typePrecedence()
          Each built-in type in JSQL has a precedence.

void writeExternal(java.io.ObjectOutput out)
          This method is responsible for writing the instance data of an object to the passed in stream.

Methods inherited from class org.apache.derby.iapi.types.NumberDataType

absolute, compare, compare, divide, divide, getDecimalValuePrecision, getDecimalValueScale, minus, normalizeDOUBLE, normalizeREAL, normalizeREAL, objectNull, plus, setBigDecimal, setValue, sqrt, typeToBigDecimal

Methods inherited from class org.apache.derby.iapi.types.DataType

checkHostVariable, cloneObject, coalesce, dataTypeConversion, equals, flip, genericSetObject, getBytes, getDate, getNationalString, getStream, getTime, getTimestamp, in, invalidFormat, isNotNull, isNullOp, normalize, outOfRange, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, throwLangSetMismatch

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.derby.iapi.types.DataValueDescriptor

checkHostVariable, coalesce, getBytes, getDate, getStream, getTime, getTimestamp, in, isNotNull, isNullOp, normalize, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue

Field Detail

SMALLINT_LENGTH

static final int SMALLINT_LENGTH

See Also:: Constant Field Values

BASE_MEMORY_USAGE

private static final int BASE_MEMORY_USAGE

value

private short value

isnull

private boolean isnull

Constructor Detail

SQLSmallint

public SQLSmallint()

No-arg constructor, required by Formattable. // This constructor also gets used when we are // allocating space for a short.

SQLSmallint

public SQLSmallint(short val)

SQLSmallint

public SQLSmallint(short val,
                   boolean isnull)

Method Detail

getInt

public int getInt()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as an int. Throws an exception if the data value is not an int.

Specified by:: getInt in interface DataValueDescriptor
Overrides:: getInt in class DataType

getByte

public byte getByte()
             throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a byte. Throws an exception if the data value is not a byte.

Specified by:: getByte in interface DataValueDescriptor
Overrides:: getByte in class DataType

getShort

public short getShort()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a short. Throws an exception if the data value is not a short.

Specified by:: getShort in interface DataValueDescriptor
Overrides:: getShort in class DataType

getLong

public long getLong()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a long. Throws an exception if the data value is not a long.

Specified by:: getLong in interface DataValueDescriptor
Overrides:: getLong in class DataType

getFloat

public float getFloat()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a float. Throws an exception if the data value is not a float.

Specified by:: getFloat in interface DataValueDescriptor
Overrides:: getFloat in class DataType

getDouble

public double getDouble()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a double. Throws an exception if the data value is not a double.

Specified by:: getDouble in interface DataValueDescriptor
Overrides:: getDouble in class DataType

getBoolean

public boolean getBoolean()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a boolean. Throws an exception if the data value is not a boolean. For DataValueDescriptor, this is the preferred interface for BIT, but for this no-casting interface, it isn't, because BIT is stored internally as a Bit, not as a Boolean.

Specified by:: getBoolean in interface DataValueDescriptor
Overrides:: getBoolean in class DataType

getString

public java.lang.String getString()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a String. Throws an exception if the data value is not a string.

getLength

public int getLength()

Description copied from interface: DataValueDescriptor

Gets the length of the data value. The meaning of this is implementation-dependent. For string types, it is the number of characters in the string. For numeric types, it is the number of bytes used to store the number. This is the actual length of this value, not the length of the type it was defined as. For example, a VARCHAR value may be shorter than the declared VARCHAR (maximum) length.

getObject

public java.lang.Object getObject()

Description copied from interface: DataValueDescriptor

Gets the value in the data value descriptor as a Java Object. The type of the Object will be the Java object type corresponding to the data value's SQL type. JDBC defines a mapping between Java object types and SQL types - we will allow that to be extended through user type definitions. Throws an exception if the data value is not an object (yeah, right).

Specified by:: getObject in interface DataValueDescriptor
Overrides:: getObject in class DataType

getTypeName

public java.lang.String getTypeName()

Description copied from interface: DataValueDescriptor

Get the SQL name of the datatype

getTypeFormatId

public int getTypeFormatId()

Return my format identifier.

isNull

public boolean isNull()

always false for non-nullable columns

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Description copied from interface: java.io.Externalizable

This method is responsible for writing the instance data of an object to the passed in stream. Note that this stream is not a subclass of OutputStream, but rather is a class that implements the ObjectOutput interface. That interface provides a number of methods for writing Java data values to a stream.

Not that the implementation of this method must be coordinated with the implementation of readExternal.

readExternalFromArray

public void readExternalFromArray(org.apache.derby.iapi.services.io.ArrayInputStream in)
                           throws java.io.IOException

Description copied from interface: DataValueDescriptor

Read the DataValueDescriptor from the stream.

Initialize the data value by reading it's values from the ArrayInputStream. This interface is provided as a way to achieve possible performance enhancement when reading an array can be optimized over reading from a generic stream from readExternal().

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException

Description copied from interface: java.io.Externalizable

This method restores an object's state by reading in the instance data for the object from the passed in stream. Note that this stream is not a subclass of InputStream, but rather is a class that implements the ObjectInput interface. That interface provides a mechanism for reading in Java data types from a stream.

Note that this method must be compatible with writeExternal. It must read back the exact same types that were written by that method in the exact order they were written.

If this method needs to read back an object instance, then the class for that object must be found and loaded. If that operation fails, then this method throws a ClassNotFoundException

restoreToNull

public void restoreToNull()

Description copied from interface: org.apache.derby.iapi.services.io.Storable

Restore this object to its (SQL)null value.

typeCompare

protected int typeCompare(DataValueDescriptor arg)
                   throws org.apache.derby.iapi.error.StandardException

Description copied from class: NumberDataType

Compare this (not null) to a non-null value.

Specified by:: typeCompare in class NumberDataType

getClone

public DataValueDescriptor getClone()

Description copied from interface: DataValueDescriptor

Clone this DataValueDescriptor. Results in a new object that has the same value as this but can be modified independently.

getNewNull

public DataValueDescriptor getNewNull()

Description copied from interface: DataValueDescriptor

Get a new null value of the same type as this data value.

setValueFromResultSet

public void setValueFromResultSet(java.sql.ResultSet resultSet,
                                  int colNumber,
                                  boolean isNullable)
                           throws java.sql.SQLException

Description copied from interface: DataValueDescriptor

Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.

setInto

public final void setInto(java.sql.PreparedStatement ps,
                          int position)
                   throws java.sql.SQLException

Set the value into a PreparedStatement.

Specified by:: setInto in interface DataValueDescriptor
Overrides:: setInto in class DataType

setInto

public final void setInto(java.sql.ResultSet rs,
                          int position)
                   throws java.sql.SQLException,
                          org.apache.derby.iapi.error.StandardException

Set this value into a ResultSet for a subsequent ResultSet.insertRow or ResultSet.updateRow. This method will only be called for non-null values.

Specified by:: setInto in interface DataValueDescriptor
Overrides:: setInto in class DataType

setValue

public void setValue(java.lang.String theValue)
              throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Set the value of this DataValueDescriptor.

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setValue

public void setValue(short theValue)

Description copied from class: NumberDataType

Common code to handle converting a short to this value by using the int to this value conversion. Simply calls setValue(int).

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class NumberDataType

setValue

public void setValue(byte theValue)

Description copied from class: NumberDataType

Common code to handle converting a byte to this value by using the int to this value conversion. Simply calls setValue(int).

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class NumberDataType

setValue

public void setValue(int theValue)
              throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Set the value of this DataValueDescriptor to the given int value

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setValue

public void setValue(long theValue)
              throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Set the value of this DataValueDescriptor to the given long value

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setValue

public void setValue(float theValue)
              throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Set the value of this DataValueDescriptor to the given double value

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setValue

public void setValue(double theValue)
              throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Set the value of this DataValueDescriptor to the given double value

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setValue

public void setValue(boolean theValue)

Description copied from interface: DataValueDescriptor

Set the value.

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setValue

public void setValue(java.lang.Object theValue)
              throws org.apache.derby.iapi.error.StandardException

Description copied from interface: DataValueDescriptor

Set the value of this DataValueDescriptor to the given value

Specified by:: setValue in interface DataValueDescriptor
Overrides:: setValue in class DataType

setFrom

protected void setFrom(DataValueDescriptor theValue)
                throws org.apache.derby.iapi.error.StandardException

Overrides:: setFrom in class DataType

typePrecedence

public int typePrecedence()

Description copied from interface: DataValueDescriptor

Each built-in type in JSQL has a precedence. This precedence determines how to do type promotion when using binary operators. For example, float has a higher precedence than int, so when adding an int to a float, the result type is float. The precedence for some types is arbitrary. For example, it doesn't matter what the precedence of the boolean type is, since it can't be mixed with other types. But the precedence for the number types is critical. The SQL standard requires that exact numeric types be promoted to approximate numeric when one operator uses both. Also, the precedence is arranged so that one will not lose precision when promoting a type.

Specified by:: typePrecedence in interface DataValueDescriptor
Overrides:: typePrecedence in class DataType

equals

public BooleanDataValue equals(DataValueDescriptor left,
                               DataValueDescriptor right)
                        throws org.apache.derby.iapi.error.StandardException

The = operator as called from the language module, as opposed to the storage module.

Specified by:: equals in interface DataValueDescriptor
Overrides:: equals in class DataType

notEquals

public BooleanDataValue notEquals(DataValueDescriptor left,
                                  DataValueDescriptor right)
                           throws org.apache.derby.iapi.error.StandardException

The <> operator as called from the language module, as opposed to the storage module.

Specified by:: notEquals in interface DataValueDescriptor
Overrides:: notEquals in class DataType

lessThan

public BooleanDataValue lessThan(DataValueDescriptor left,
                                 DataValueDescriptor right)
                          throws org.apache.derby.iapi.error.StandardException

The < operator as called from the language module, as opposed to the storage module.

Specified by:: lessThan in interface DataValueDescriptor
Overrides:: lessThan in class DataType

greaterThan

public BooleanDataValue greaterThan(DataValueDescriptor left,
                                    DataValueDescriptor right)
                             throws org.apache.derby.iapi.error.StandardException

The > operator as called from the language module, as opposed to the storage module.

Specified by:: greaterThan in interface DataValueDescriptor
Overrides:: greaterThan in class DataType

lessOrEquals

public BooleanDataValue lessOrEquals(DataValueDescriptor left,
                                     DataValueDescriptor right)
                              throws org.apache.derby.iapi.error.StandardException

The <= operator as called from the language module, as opposed to the storage module.

Specified by:: lessOrEquals in interface DataValueDescriptor
Overrides:: lessOrEquals in class DataType

greaterOrEquals

public BooleanDataValue greaterOrEquals(DataValueDescriptor left,
                                        DataValueDescriptor right)
                                 throws org.apache.derby.iapi.error.StandardException

The >= operator as called from the language module, as opposed to the storage module.

Specified by:: greaterOrEquals in interface DataValueDescriptor
Overrides:: greaterOrEquals in class DataType

times

public NumberDataValue times(NumberDataValue left,
                             NumberDataValue right,
                             NumberDataValue result)
                      throws org.apache.derby.iapi.error.StandardException

This method implements the * operator for "smallint * smallint".

mod

public NumberDataValue mod(NumberDataValue dividend,
                           NumberDataValue divisor,
                           NumberDataValue result)
                    throws org.apache.derby.iapi.error.StandardException

mod(smallint, smallint)

Specified by:: mod in interface NumberDataValue
Overrides:: mod in class NumberDataType

minus

public NumberDataValue minus(NumberDataValue result)
                      throws org.apache.derby.iapi.error.StandardException

This method implements the unary minus operator for smallint.

isNegative

protected boolean isNegative()

This method implements the isNegative method.

Specified by:: isNegative in class NumberDataType

toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

hashCode

public int hashCode()

Description copied from class: java.lang.Object

Get a value that represents this Object, as uniquely as possible within the confines of an int.

There are some requirements on this method which subclasses must follow:

Semantic equality implies identical hashcodes. In other words, if a.equals(b) is true, then a.hashCode() == b.hashCode() must be as well. However, the reverse is not necessarily true, and two objects may have the same hashcode without being equal.
It must be consistent. Whichever value o.hashCode() returns on the first invocation must be the value returned on all later invocations as long as the object exists. Notice, however, that the result of hashCode may change between separate executions of a Virtual Machine, because it is not invoked on the same object.

Notice that since hashCode is used in java.util.Hashtable and other hashing classes, a poor implementation will degrade the performance of hashing (so don't blindly implement it as returning a constant!). Also, if calculating the hash is time-consuming, a class may consider caching the results.

The default implementation returns System.identityHashCode(this)

estimateMemoryUsage

public int estimateMemoryUsage()

Description copied from interface: DataValueDescriptor

Estimate the memory usage in bytes of the data value and the overhead of the class.

Overview

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Field Summary
`private static int`	`BASE_MEMORY_USAGE`
`private boolean`	`isnull`
`(package private) static int`	`SMALLINT_LENGTH`
`private short`	`value`

Constructor Summary
`SQLSmallint()` No-arg constructor, required by Formattable.
`SQLSmallint(short val)`
`SQLSmallint(short val, boolean isnull)`

Method Summary
`BooleanDataValue`	`equals(DataValueDescriptor left, DataValueDescriptor right)` The = operator as called from the language module, as opposed to the storage module.
`int`	`estimateMemoryUsage()` Estimate the memory usage in bytes of the data value and the overhead of the class.
`boolean`	`getBoolean()` Gets the value in the data value descriptor as a boolean.
`byte`	`getByte()` Gets the value in the data value descriptor as a byte.
`DataValueDescriptor`	`getClone()` Clone this DataValueDescriptor.
`double`	`getDouble()` Gets the value in the data value descriptor as a double.
`float`	`getFloat()` Gets the value in the data value descriptor as a float.
`int`	`getInt()` Gets the value in the data value descriptor as an int.
`int`	`getLength()` Gets the length of the data value.
`long`	`getLong()` Gets the value in the data value descriptor as a long.
`DataValueDescriptor`	`getNewNull()` Get a new null value of the same type as this data value.
`java.lang.Object`	`getObject()` Gets the value in the data value descriptor as a Java Object.
`short`	`getShort()` Gets the value in the data value descriptor as a short.
`java.lang.String`	`getString()` Gets the value in the data value descriptor as a String.
`int`	`getTypeFormatId()` Return my format identifier.
`java.lang.String`	`getTypeName()` Get the SQL name of the datatype
`BooleanDataValue`	`greaterOrEquals(DataValueDescriptor left, DataValueDescriptor right)` The >= operator as called from the language module, as opposed to the storage module.
`BooleanDataValue`	`greaterThan(DataValueDescriptor left, DataValueDescriptor right)` The > operator as called from the language module, as opposed to the storage module.
`int`	`hashCode()` Get a value that represents this Object, as uniquely as possible within the confines of an int.
`protected boolean`	`isNegative()` This method implements the isNegative method.
`boolean`	`isNull()` always false for non-nullable columns
`BooleanDataValue`	`lessOrEquals(DataValueDescriptor left, DataValueDescriptor right)` The <= operator as called from the language module, as opposed to the storage module.
`BooleanDataValue`	`lessThan(DataValueDescriptor left, DataValueDescriptor right)` The < operator as called from the language module, as opposed to the storage module.
`NumberDataValue`	`minus(NumberDataValue result)` This method implements the unary minus operator for smallint.
`NumberDataValue`	`mod(NumberDataValue dividend, NumberDataValue divisor, NumberDataValue result)` mod(smallint, smallint)
`BooleanDataValue`	`notEquals(DataValueDescriptor left, DataValueDescriptor right)` The <> operator as called from the language module, as opposed to the storage module.
`void`	`readExternal(java.io.ObjectInput in)` This method restores an object's state by reading in the instance data for the object from the passed in stream.
`void`	`readExternalFromArray(org.apache.derby.iapi.services.io.ArrayInputStream in)` Read the DataValueDescriptor from the stream.
`void`	`restoreToNull()` Restore this object to its (SQL)null value.
`protected void`	`setFrom(DataValueDescriptor theValue)`
`void`	`setInto(java.sql.PreparedStatement ps, int position)` Set the value into a PreparedStatement.
`void`	`setInto(java.sql.ResultSet rs, int position)` Set this value into a ResultSet for a subsequent ResultSet.insertRow or ResultSet.updateRow.
`void`	`setValue(boolean theValue)` Set the value.
`void`	`setValue(byte theValue)` Common code to handle converting a byte to this value by using the int to this value conversion.
`void`	`setValue(double theValue)` Set the value of this DataValueDescriptor to the given double value
`void`	`setValue(float theValue)` Set the value of this DataValueDescriptor to the given double value
`void`	`setValue(int theValue)` Set the value of this DataValueDescriptor to the given int value
`void`	`setValue(long theValue)` Set the value of this DataValueDescriptor to the given long value
`void`	`setValue(java.lang.Object theValue)` Set the value of this DataValueDescriptor to the given value
`void`	`setValue(short theValue)` Common code to handle converting a short to this value by using the int to this value conversion.
`void`	`setValue(java.lang.String theValue)` Set the value of this DataValueDescriptor.
`void`	`setValueFromResultSet(java.sql.ResultSet resultSet, int colNumber, boolean isNullable)` Set the value based on the value for the specified DataValueDescriptor from the specified ResultSet.
`NumberDataValue`	`times(NumberDataValue left, NumberDataValue right, NumberDataValue result)` This method implements the * operator for "smallint * smallint".
`java.lang.String`	`toString()` Convert this Object to a human-readable String.
`protected int`	`typeCompare(DataValueDescriptor arg)` Compare this (not null) to a non-null value.
`int`	`typePrecedence()` Each built-in type in JSQL has a precedence.
`void`	`writeExternal(java.io.ObjectOutput out)` This method is responsible for writing the instance data of an object to the passed in stream.

org.apache.derby.iapi.types Class SQLSmallint

SMALLINT_LENGTH

BASE_MEMORY_USAGE

value

isnull

SQLSmallint

SQLSmallint

SQLSmallint

getInt

getByte

getShort

getLong

getFloat

getDouble

getBoolean

getString

getLength

getObject

getTypeName

getTypeFormatId

isNull

writeExternal

readExternalFromArray

readExternal

restoreToNull

typeCompare

getClone

getNewNull

setValueFromResultSet

setInto

setInto

setValue

setValue

setValue

setValue

setValue

setValue

setValue

setValue

setValue

setFrom

typePrecedence

equals

notEquals

lessThan

greaterThan

lessOrEquals

greaterOrEquals

times

mod

minus

isNegative

toString

hashCode

estimateMemoryUsage

org.apache.derby.iapi.types
Class SQLSmallint