org.apache.derby.iapi.types
Class SQLLongint

java.lang.Object
  extended by org.apache.derby.iapi.types.DataType
      extended by org.apache.derby.iapi.types.NumberDataType
          extended by org.apache.derby.iapi.types.SQLLongint
All Implemented Interfaces:
java.io.Externalizable, java.io.Serializable, java.lang.Comparable, Formatable, Storable, TypedFormat, DataValueDescriptor, NumberDataValue, Orderable

public final class SQLLongint
extends NumberDataType

SQLLongint satisfies the DataValueDescriptor interfaces (i.e., OrderableDataType). It implements a bigint 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 DataType, SQLLongint can play a role in either a DataType/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 Long more than it probably wants to.

See Also:
Serialized Form

Field Summary
private static int BASE_MEMORY_USAGE
           
private  boolean isnull
           
private  long 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.DataValueDescriptor
UNKNOWN_LOGICAL_LENGTH
 
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
  SQLLongint()
          no-arg constructor, required by Formattable
  SQLLongint(long val)
           
  SQLLongint(java.lang.Long obj)
           
private SQLLongint(long val, boolean isnull)
           
 
Method Summary
 DataValueDescriptor cloneValue(boolean forceMaterialization)
          Clone this DataValueDescriptor.
 NumberDataValue divide(NumberDataValue dividend, NumberDataValue divisor, NumberDataValue result)
          This method implements the / operator for "bigint / bigint".
 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.
 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 a 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 int.
 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()
           
protected  boolean isNegative()
          This method implements the isNegative method.
 boolean isNull()
          Return whether the value is null or not.
 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 bigint.
 NumberDataValue minus(NumberDataValue left, NumberDataValue right, NumberDataValue result)
          This method implements the - operator for "bigint - bigint".
 NumberDataValue mod(NumberDataValue dividend, NumberDataValue divisor, NumberDataValue result)
          mod(bigint, bigint)
 BooleanDataValue notEquals(DataValueDescriptor left, DataValueDescriptor right)
          The <> operator as called from the language module, as opposed to the storage module.
 NumberDataValue plus(NumberDataValue addend1, NumberDataValue addend2, NumberDataValue result)
          This method implements the + operator for "bigint + bigint".
 void readExternal(java.io.ObjectInput in)
           
 void readExternalFromArray(ArrayInputStream in)
          Read the DataValueDescriptor from the stream.
 void restoreToNull()
          Restore this object to its (SQL)null value.
protected  void setFrom(DataValueDescriptor theValue)
          Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor.
 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.
(package private)  void setObject(java.lang.Object theValue)
          Set the value from a correctly typed Long object.
 void setValue(boolean theValue)
          Set the value.
 void setValue(double theValue)
          Set the value of this DataValueDescriptor to the given double value At DataType level just throws an error lower classes will override
 void setValue(float theValue)
          Set the value of this DataValueDescriptor to the given float value At DataType level just throws an error lower classes will override
 void setValue(int theValue)
          Set the value of this DataValueDescriptor to the given int value At DataType level just throws an error lower classes will override
 void setValue(long theValue)
          Set the value of this DataValueDescriptor to the given long value At DataType level just throws an error lower classes will override
 void setValue(java.lang.Number theValue)
          Common code to handle java.lang.Integer as a Number, used for TINYINT, SMALLINT, INTEGER
 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 "bigint * bigint".
 java.lang.String toString()
           
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)
           
 
Methods inherited from class org.apache.derby.iapi.types.NumberDataType
absolute, compare, compare, divide, getDecimalValuePrecision, getDecimalValueScale, normalizeDOUBLE, normalizeREAL, normalizeREAL, objectNull, setBigDecimal, setValue, setValue, sqrt, typeToBigDecimal
 
Methods inherited from class org.apache.derby.iapi.types.DataType
checkHostVariable, cloneHolder, coalesce, compare, compare, compareTo, dataTypeConversion, equals, flip, genericSetObject, getBytes, getDate, getNationalString, getStream, getTime, getTimestamp, getTraceString, getTypeName, hasStream, in, invalidFormat, isNotNull, isNullOp, normalize, outOfRange, recycle, setObjectForCast, setToNull, setValue, 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, cloneHolder, coalesce, compare, compare, getBytes, getDate, getStream, getTime, getTimestamp, getTraceString, hasStream, in, isNotNull, isNullOp, normalize, recycle, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue
 

Field Detail

BASE_MEMORY_USAGE

private static final int BASE_MEMORY_USAGE

value

private long value

isnull

private boolean isnull
Constructor Detail

SQLLongint

public SQLLongint()
no-arg constructor, required by Formattable


SQLLongint

public SQLLongint(long val)

SQLLongint

private SQLLongint(long val,
                   boolean isnull)

SQLLongint

public SQLLongint(java.lang.Long obj)
Method Detail

getInt

public int getInt()
           throws StandardException
Description copied from class: DataType
Gets the value in the data value descriptor as a int. Throws an exception if the data value is not receivable as a int.

Specified by:
getInt in interface DataValueDescriptor
Overrides:
getInt in class DataType
Returns:
The data value as a int.
Throws:
StandardException - thrown on failure to convert

getByte

public byte getByte()
             throws StandardException
Description copied from class: DataType
Gets the value in the data value descriptor as a byte. Throws an exception if the data value is not receivable as a byte.

Specified by:
getByte in interface DataValueDescriptor
Overrides:
getByte in class DataType
Returns:
The data value as a byte.
Throws:
StandardException - thrown on failure to convert

getShort

public short getShort()
               throws StandardException
Description copied from class: DataType
Gets the value in the data value descriptor as a short. Throws an exception if the data value is not receivable as a short.

Specified by:
getShort in interface DataValueDescriptor
Overrides:
getShort in class DataType
Returns:
The data value as a short.
Throws:
StandardException - thrown on failure to convert

getLong

public long getLong()
Description copied from class: DataType
Gets the value in the data value descriptor as a long. Throws an exception if the data value is not receivable as a long.

Specified by:
getLong in interface DataValueDescriptor
Overrides:
getLong in class DataType
Returns:
The data value as a long.

getFloat

public float getFloat()
Description copied from class: DataType
Gets the value in the data value descriptor as a float. Throws an exception if the data value is not receivable as a float.

Specified by:
getFloat in interface DataValueDescriptor
Overrides:
getFloat in class DataType
Returns:
The data value as a float.

getDouble

public double getDouble()
Description copied from class: DataType
Gets the value in the data value descriptor as a double. Throws an exception if the data value is not receivable as a double.

Specified by:
getDouble in interface DataValueDescriptor
Overrides:
getDouble in class DataType
Returns:
The data value as a double.

getBoolean

public boolean getBoolean()
Description copied from class: DataType
Gets the value in the data value descriptor as a boolean. Throws an exception if the data value is not receivable as a boolean.

Specified by:
getBoolean in interface DataValueDescriptor
Overrides:
getBoolean in class DataType
Returns:
The data value as a boolean.

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.

Returns:
The data value as a String.

getObject

public java.lang.Object getObject()
Description copied from class: DataType
Gets the value in the data value descriptor as a int. Throws an exception if the data value is not receivable as a int.

Specified by:
getObject in interface DataValueDescriptor
Overrides:
getObject in class DataType
Returns:
The data value as a int.

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.

Returns:
The length of the data value

getTypeName

public java.lang.String getTypeName()
Description copied from interface: DataValueDescriptor
Get the SQL name of the datatype

Returns:
The SQL name of the datatype

getTypeFormatId

public int getTypeFormatId()
Return my format identifier.

Returns:
The identifier. (A UUID stuffed in an array of 16 bytes).
See Also:
TypedFormat.getTypeFormatId()

isNull

public boolean isNull()
Description copied from interface: Storable
Return whether the value is null or not.

Returns:
true if the value is null and false otherwise.
See Also:
Storable.isNull()

writeExternal

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

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException
Throws:
java.io.IOException
See Also:
Externalizable.readExternal(java.io.ObjectInput)

readExternalFromArray

public void readExternalFromArray(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().

Parameters:
in - The array stream positioned at the beginning of the byte stream to read from.
Throws:
java.io.IOException - Usual error is if you try to read past limit on the stream.

restoreToNull

public void restoreToNull()
Description copied from interface: Storable
Restore this object to its (SQL)null value.

See Also:
Storable.restoreToNull()

typeCompare

protected int typeCompare(DataValueDescriptor arg)
                   throws StandardException
Description copied from class: NumberDataType
Compare this (not null) to a non-null value.

Specified by:
typeCompare in class NumberDataType
Throws:
StandardException - Thrown on error

cloneValue

public DataValueDescriptor cloneValue(boolean forceMaterialization)
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.

Even though the objects can be modified independently regardless of the value of forceMaterialization, both the clone and the original may be dependent on the store state if forceMaterialization is set to false. An example is if you need to access the value you just read using cloneValue after the current transaction has ended, or after the source result set has been closed.

Parameters:
forceMaterialization - any streams representing the data value will be materialized if true, the data value will be kept as a stream if possible if false
Returns:
A clone of the DataValueDescriptor with the same initial value as this.
See Also:
DataValueDescriptor.cloneValue(boolean)

getNewNull

public DataValueDescriptor getNewNull()
Description copied from interface: DataValueDescriptor
Get a new null value of the same type as this data value.

See Also:
DataValueDescriptor.getNewNull()

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.

Parameters:
resultSet - The specified ResultSet.
colNumber - The 1-based column # into the resultSet.
isNullable - Whether or not the column is nullable (No need to call wasNull() if not)
Throws:
java.sql.SQLException - Thrown on error
See Also:
DataValueDescriptor.setValueFromResultSet(java.sql.ResultSet, int, boolean)

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
Throws:
java.sql.SQLException - Error setting value in PreparedStatement

setInto

public final void setInto(java.sql.ResultSet rs,
                          int position)
                   throws java.sql.SQLException
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
Throws:
java.sql.SQLException - thrown by the ResultSet object

setValue

public void setValue(java.lang.String theValue)
              throws StandardException
Description copied from class: DataType
Set the value of this DataValueDescriptor. At DataType level just throws an error lower classes will override

Specified by:
setValue in interface DataValueDescriptor
Overrides:
setValue in class DataType
Parameters:
theValue - The BigDecimal value to set this DataValueDescriptor to
Throws:
StandardException - thrown if string not accepted

setValue

public final void setValue(java.lang.Number theValue)
Description copied from class: NumberDataType
Common code to handle java.lang.Integer as a Number, used for TINYINT, SMALLINT, INTEGER

Specified by:
setValue in interface NumberDataValue
Overrides:
setValue in class NumberDataType
Parameters:
theValue - An Number containing the value to set this NumberDataValue to. Null means set the value to SQL null.
Throws:
StandardException - Thrown on error
See Also:
NumberDataValue.setValue(java.lang.Number)

setValue

public void setValue(long theValue)
Description copied from class: DataType
Set the value of this DataValueDescriptor to the given long value At DataType level just throws an error lower classes will override

Specified by:
setValue in interface DataValueDescriptor
Overrides:
setValue in class DataType
Parameters:
theValue - The value to set this DataValueDescriptor to

setValue

public void setValue(int theValue)
Description copied from class: DataType
Set the value of this DataValueDescriptor to the given int value At DataType level just throws an error lower classes will override

Specified by:
setValue in interface DataValueDescriptor
Overrides:
setValue in class DataType
Parameters:
theValue - The value to set this DataValueDescriptor to

setValue

public void setValue(float theValue)
              throws StandardException
Description copied from class: DataType
Set the value of this DataValueDescriptor to the given float value At DataType level just throws an error lower classes will override

Specified by:
setValue in interface DataValueDescriptor
Overrides:
setValue in class DataType
Parameters:
theValue - The value to set this DataValueDescriptor to
Throws:
StandardException - Thrown on error
See Also:
NumberDataValue.setValue(java.lang.Number)

setValue

public void setValue(double theValue)
              throws StandardException
Description copied from class: DataType
Set the value of this DataValueDescriptor to the given double value At DataType level just throws an error lower classes will override

Specified by:
setValue in interface DataValueDescriptor
Overrides:
setValue in class DataType
Parameters:
theValue - The value to set this DataValueDescriptor to
Throws:
StandardException - Thrown on error
See Also:
NumberDataValue.setValue(java.lang.Number)

setValue

public void setValue(boolean theValue)
Description copied from class: DataType
Set the value. At DataType level just throws an error lower classes will override

Specified by:
setValue in interface DataValueDescriptor
Overrides:
setValue in class DataType
Parameters:
theValue - Contains the boolean value to set this to
See Also:
NumberDataValue.setValue(java.lang.Number)

setObject

void setObject(java.lang.Object theValue)
Set the value from a correctly typed Long object.

Overrides:
setObject in class NumberDataType
Throws:
StandardException

setFrom

protected void setFrom(DataValueDescriptor theValue)
                throws StandardException
Description copied from class: DataType
Set the value of this DataValueDescriptor based on the value of the specified DataValueDescriptor.

Overrides:
setFrom in class DataType
Parameters:
theValue - The DataValueDescriptor that holds the value to which we want to set this DataValueDescriptor's value.
Throws:
StandardException

typePrecedence

public int typePrecedence()
Description copied from class: DataType
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
Returns:
The precedence of this type.
See Also:
DataValueDescriptor.typePrecedence()

equals

public BooleanDataValue equals(DataValueDescriptor left,
                               DataValueDescriptor right)
                        throws 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
Parameters:
left - The value on the left side of the =
right - The value on the right side of the =
Returns:
A SQL boolean value telling whether the two parameters are equal
Throws:
StandardException - Thrown on error

notEquals

public BooleanDataValue notEquals(DataValueDescriptor left,
                                  DataValueDescriptor right)
                           throws 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
Parameters:
left - The value on the left side of the <>
right - The value on the right side of the <>
Returns:
A SQL boolean value telling whether the two parameters are not equal
Throws:
StandardException - Thrown on error

lessThan

public BooleanDataValue lessThan(DataValueDescriptor left,
                                 DataValueDescriptor right)
                          throws 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
Parameters:
left - The value on the left side of the <
right - The value on the right side of the <
Returns:
A SQL boolean value telling whether the first operand is less than the second operand
Throws:
StandardException - Thrown on error

greaterThan

public BooleanDataValue greaterThan(DataValueDescriptor left,
                                    DataValueDescriptor right)
                             throws 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
Parameters:
left - The value on the left side of the >
right - The value on the right side of the >
Returns:
A SQL boolean value telling whether the first operand is greater than the second operand
Throws:
StandardException - Thrown on error

lessOrEquals

public BooleanDataValue lessOrEquals(DataValueDescriptor left,
                                     DataValueDescriptor right)
                              throws 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
Parameters:
left - The value on the left side of the <=
right - The value on the right side of the <=
Returns:
A SQL boolean value telling whether the first operand is less than or equal to the second operand
Throws:
StandardException - Thrown on error

greaterOrEquals

public BooleanDataValue greaterOrEquals(DataValueDescriptor left,
                                        DataValueDescriptor right)
                                 throws 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
Parameters:
left - The value on the left side of the >=
right - The value on the right side of the >=
Returns:
A SQL boolean value telling whether the first operand is greater than or equal to the second operand
Throws:
StandardException - Thrown on error

plus

public NumberDataValue plus(NumberDataValue addend1,
                            NumberDataValue addend2,
                            NumberDataValue result)
                     throws StandardException
This method implements the + operator for "bigint + bigint".

Specified by:
plus in interface NumberDataValue
Overrides:
plus in class NumberDataType
Parameters:
addend1 - One of the addends
addend2 - The other addend
result - The result of a previous call to this method, null if not called yet
Returns:
A SQLLongint containing the result of the addition
Throws:
StandardException - Thrown on error

minus

public NumberDataValue minus(NumberDataValue left,
                             NumberDataValue right,
                             NumberDataValue result)
                      throws StandardException
This method implements the - operator for "bigint - bigint".

Specified by:
minus in interface NumberDataValue
Overrides:
minus in class NumberDataType
Parameters:
left - The value to be subtracted from
right - The value to be subtracted
result - The result of a previous call to this method, null if not called yet
Returns:
A SQLLongint containing the result of the subtraction
Throws:
StandardException - Thrown on error

times

public NumberDataValue times(NumberDataValue left,
                             NumberDataValue right,
                             NumberDataValue result)
                      throws StandardException
This method implements the * operator for "bigint * bigint".

Parameters:
left - The first value to be multiplied
right - The second value to be multiplied
result - The result of a previous call to this method, null if not called yet
Returns:
A SQLLongint containing the result of the multiplication
Throws:
StandardException - Thrown on error

divide

public NumberDataValue divide(NumberDataValue dividend,
                              NumberDataValue divisor,
                              NumberDataValue result)
                       throws StandardException
This method implements the / operator for "bigint / bigint".

Specified by:
divide in interface NumberDataValue
Overrides:
divide in class NumberDataType
Parameters:
dividend - The numerator
divisor - The denominator
result - The result of a previous call to this method, null if not called yet
Returns:
A SQLLongint containing the result of the division
Throws:
StandardException - Thrown on error

mod

public NumberDataValue mod(NumberDataValue dividend,
                           NumberDataValue divisor,
                           NumberDataValue result)
                    throws StandardException
mod(bigint, bigint)

Specified by:
mod in interface NumberDataValue
Overrides:
mod in class NumberDataType
Parameters:
dividend - The numerator
divisor - The denominator
result - The result of the previous call to this method, null if not called yet.
Returns:
dividend / divisor
Throws:
StandardException - Thrown on error, if result is non-null then its value will be unchanged.

minus

public NumberDataValue minus(NumberDataValue result)
                      throws StandardException
This method implements the unary minus operator for bigint.

Parameters:
result - The result of a previous call to this method, null if not called yet
Returns:
A SQLLongint containing the result of the negation
Throws:
StandardException - Thrown on error

isNegative

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

Specified by:
isNegative in class NumberDataType
Returns:
A boolean. if this.value is negative, return true.
Throws:
StandException - Thrown on error

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

hashCode

public int hashCode()
Overrides:
hashCode in class java.lang.Object

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.

Returns:
the estimated memory usage

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