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
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:
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Field Summary
Fields inherited from class org.apache.derby.impl.store.access.btree.index.B2I
baseConglomerateId, FORMAT_NUMBER, rowLocationColumn
Fields inherited from class org.apache.derby.impl.store.access.btree.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 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
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
Return my format identifier.void
Store the stored representation of the column value in the stream.Methods inherited from class org.apache.derby.impl.store.access.btree.index.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 org.apache.derby.impl.store.access.btree.BTree
addColumn, create, createTemplate, getContainerid, getDynamicCompiledConglomInfo, getId, isNull, isTemporary, isUnique, isUniqueWithDuplicateNulls, restoreToNull, setUniqueWithDuplicateNulls, toString
Methods inherited from class org.apache.derby.impl.store.access.conglomerate.GenericConglomerate
cloneValue, compare, getLength, getNewNull, getObject, getString, getTypeName, hasCollatedColumns, setFrom, setValueFromResultSet
Methods inherited from class org.apache.derby.iapi.types.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 java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.derby.iapi.types.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
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Constructor Details
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B2I_v10_2
public B2I_v10_2()No arg constructor, required by Formatable.
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Method Details
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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 interfaceTypedFormat
- Overrides:
getTypeFormatId
in classB2I
- Returns:
- The identifier. (A UUID stuffed in an array of 16 bytes).
- See Also:
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writeExternal
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 interfaceExternalizable
- Overrides:
writeExternal
in classB2I
- Throws:
IOException
- thrown by writeObject()- See Also:
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