Class B2I_v10_2

java.lang.Object

org.apache.derby.iapi.types.DataType

org.apache.derby.impl.store.access.conglomerate.GenericConglomerate

org.apache.derby.impl.store.access.btree.BTree

org.apache.derby.impl.store.access.btree.index.B2I

org.apache.derby.impl.store.access.btree.index.B2I_v10_2

All Implemented Interfaces:

Externalizable, Serializable, Comparable, Formatable, Storable, TypedFormat, Conglomerate, DataValueDescriptor, Orderable

public class B2I_v10_2
extends B2I

Class used to instantiate 10.2 version of the B2I object. This class implements the format of the B2I object as existed in the 10.2 and previous releases of Derby. In subsequent releases the format was enhanced to store the Collation Id of the columns in the index. Collation can be configured on a per column basis to allow for alter sort ordering of each column. One use of this is to allow a column to be sorted according to language based rules rather than the default numerical ordering of the binary value. For upgrade purpose all columns stored with ACCESS_B2I_V3_ID format are assumed to be USC_BASIC collation id (ie. the default numerical ordering, rather than any alternate collation). This class reads and writes the V3 version to/from disk and reads/writes current in-memory version of the data structure.

See Also:

• Serialized Form

Field Summary

Fields inherited from class B2I

baseConglomerateId, FORMAT_NUMBER, rowLocationColumn

Fields inherited from class BTree

ascDescInfo, collation_ids, conglom_format_id, format_ids, hasCollatedTypes, id, nKeyFields, PROPERTY_ALLOWDUPLICATES, PROPERTY_MAX_ROWS_PER_PAGE_PARAMETER, PROPERTY_NKEYFIELDS, PROPERTY_NUNIQUECOLUMNS, PROPERTY_PARENTLINKS, PROPERTY_UNIQUE_WITH_DUPLICATE_NULLS, ROOTPAGEID

Fields inherited from interface DataValueDescriptor

UNKNOWN_LOGICAL_LENGTH

Fields inherited from interface Orderable

ORDER_OP_EQUALS, ORDER_OP_GREATEROREQUALS, ORDER_OP_GREATERTHAN, ORDER_OP_LESSOREQUALS, ORDER_OP_LESSTHAN

Constructor Summary

Constructors

Constructor	Description
B2I_v10_2()	No arg constructor, required by Formatable.

Method Summary

Modifier and Type	Method	Description
int	getTypeFormatId()	Return my format identifier.
void	writeExternal(ObjectOutput out)	Store the stored representation of the column value in the stream.

Methods inherited from class B2I

compressConglomerate, create, defragmentConglomerate, drop, estimateMemoryUsage, fetchMaxOnBTree, getBtreeLockingPolicy, getStaticCompiledConglomInfo, load, lockTable, open, openScan, openStoreCost, purgeConglomerate, readExternal, writeExternal_v10_2, writeExternal_v10_3

Methods inherited from class BTree

addColumn, create, createTemplate, getContainerid, getDynamicCompiledConglomInfo, getId, isNull, isTemporary, isUnique, isUniqueWithDuplicateNulls, restoreToNull, setUniqueWithDuplicateNulls, toString

Methods inherited from class GenericConglomerate

cloneValue, compare, getLength, getNewNull, getObject, getString, getTypeName, hasCollatedColumns, setFrom, setValueFromResultSet

Methods inherited from class DataType

checkHostVariable, cloneHolder, coalesce, compare, compare, compare, compareTo, dataTypeConversion, equals, equals, flip, getBoolean, getByte, getBytes, getDate, getDouble, getFloat, getInt, getLong, getShort, getStream, getTime, getTimestamp, getTraceString, greaterOrEquals, greaterThan, hasStream, in, invalidFormat, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, outOfRange, readExternalFromArray, recycle, setBigDecimal, setInto, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, throwLangSetMismatch, typePrecedence, typeToBigDecimal

Methods inherited from class Object

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

Methods inherited from interface DataValueDescriptor

checkHostVariable, cloneHolder, coalesce, compare, compare, compare, equals, getBoolean, getByte, getBytes, getDate, getDouble, getFloat, getInt, getLong, getShort, getStream, getTime, getTimestamp, getTraceString, greaterOrEquals, greaterThan, hasStream, in, isNotNull, isNullOp, lessOrEquals, lessThan, normalize, notEquals, readExternalFromArray, recycle, setBigDecimal, setInto, setInto, setObjectForCast, setToNull, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, setValue, typePrecedence, typeToBigDecimal

Constructor Details

B2I_v10_2

public B2I_v10_2()

No arg constructor, required by Formatable.

Method Details

getTypeFormatId

public int getTypeFormatId()

Return my format identifier.

This identifier was used for B2I in all Derby versions prior to and including 10.2. Databases hard upgraded to a version subsequent to 10.2 will write the new format, see B2I. Databases created in a version subsequent to 10.2 will also write the new formate, see B2I.

Specified by:

getTypeFormatId in interface TypedFormat

Overrides:

getTypeFormatId in class B2I

Returns:

The identifier. (A UUID stuffed in an array of 16 bytes).

See Also:

• TypedFormat.getTypeFormatId()

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Store the stored representation of the column value in the stream.

For more detailed description of the format see documentation at top of file.

Specified by:

writeExternal in interface Externalizable

Overrides:

writeExternal in class B2I

Throws:

IOException - thrown by writeObject()

See Also:

• Externalizable.writeExternal(ObjectOutput)