Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> iapi >> [ types overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---

org.apache.derby.iapi.types
Class SQLBlob  

java.lang.Object
  org.apache.derby.iapi.types.DataType
      org.apache.derby.iapi.types.SQLBinary
          org.apache.derby.iapi.types.SQLBlob

All Implemented Interfaces:

BitDataValue, CloneableObject, ConcatableDataValue, DataValueDescriptor, java.io.Externalizable, org.apache.derby.iapi.services.io.Formatable, Orderable, java.io.Serializable, org.apache.derby.iapi.services.io.Storable, org.apache.derby.iapi.services.io.StreamStorable, org.apache.derby.iapi.services.io.TypedFormat, VariableSizeDataValue

---

public class SQLBlob

extends SQLBinary

SQLBlob satisfies the DataValueDescriptor, interfaces (i.e., OrderableDataType). It uses the SQLLongVarbit implementation, which implements a String holder, e.g. for storing a column value; it can be specified when constructed to not allow nulls. Nullability cannot be changed after construction.

Because LOB types are not orderable, we'll override those methods...

---

Field Summary

 

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

dataValue, PAD, stream, streamLength

 

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

 

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

IGNORE_PRECISION

 

Constructor Summary

SQLBlob()

SQLBlob(byte[] val)

 

Method Summary
DataValueDescriptor	getNewNull()           Get a new null value of the same type as this data value.
int	getTypeFormatId()           Return my format identifier.
java.lang.String	getTypeName()           Get the SQL name of the datatype
void	normalize(DataTypeDescriptor desiredType, DataValueDescriptor source)           Normalization method - this method may be called when putting a value into a SQLBit, for example, when inserting into a SQLBit column.
void	setInto(java.sql.PreparedStatement ps, int position)           Adding this method to ensure that super class' setInto method doesn't get called that leads to the violation of JDBC spec( untyped nulls ) when batching is turned on.
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.
DataValueDescriptor	setWidth(int desiredWidth, int desiredScale, boolean errorOnTrunc)
int	typePrecedence()           Each built-in type in JSQL has a precedence.

 

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

charLength, checkHostVariable, cloneObject, compare, compare, concatenate, equals, estimateMemoryUsage, getBytes, getClone, getLength, getStream, getString, getValue, greaterOrEquals, greaterThan, hashCode, isNull, lessOrEquals, lessThan, loadStream, notEquals, objectNull, readExternal, readExternalFromArray, restoreToNull, returnStream, setFrom, setStream, setValue, setValue, substring, toString, writeExternal

 

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

coalesce, dataTypeConversion, equals, flip, genericSetObject, getBoolean, getByte, getDate, getDouble, getFloat, getInt, getLong, getNationalString, getObject, getShort, getTime, getTimestamp, in, invalidFormat, isNotNull, isNullOp, outOfRange, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, throwLangSetMismatch, typeToBigDecimal

 

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

coalesce, getBoolean, getByte, getDate, getDouble, getFloat, getInt, getLong, getObject, getShort, getTime, getTimestamp, in, isNotNull, isNullOp, setBigDecimal, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, typeToBigDecimal

 

Constructor Detail

SQLBlob

public SQLBlob()

---

SQLBlob

public SQLBlob(byte[] val)

Method Detail

getTypeName

public java.lang.String getTypeName()

Description copied from interface: DataValueDescriptor

Get the SQL name of the datatype

---

getNewNull

public DataValueDescriptor getNewNull()

Description copied from interface: DataValueDescriptor

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

---

normalize

public void normalize(DataTypeDescriptor desiredType,
                      DataValueDescriptor source)
               throws org.apache.derby.iapi.error.StandardException

Normalization method - this method may be called when putting a value into a SQLBit, for example, when inserting into a SQLBit column. See NormalizeResultSet in execution.

Specified by:

normalize in interface DataValueDescriptor

Overrides:

normalize in class DataType

---

setWidth

public DataValueDescriptor setWidth(int desiredWidth,
                                    int desiredScale,
                                    boolean errorOnTrunc)
                             throws org.apache.derby.iapi.error.StandardException

---

getTypeFormatId

public int getTypeFormatId()

Return my format identifier.

---

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.

---

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

---

setInto

public void setInto(java.sql.PreparedStatement ps,
                    int position)
             throws java.sql.SQLException,
                    org.apache.derby.iapi.error.StandardException

Description copied from class: SQLBinary

Adding this method to ensure that super class' setInto method doesn't get called that leads to the violation of JDBC spec( untyped nulls ) when batching is turned on.

Specified by:

setInto in interface DataValueDescriptor

Overrides:

setInto in class SQLBinary

---

Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> iapi >> [ types overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

---