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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.store.access.conglomerate

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Class Diagram

Java Document (Java Doc)

java.lang .Object

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

OpenConglomerateScratchSpace
public class OpenConglomerateScratchSpace implements DynamicCompiledOpenConglomInfo(Code)
	A utility class to store and use temporary scratch space associated with a conglomerate.

Constructor Summary
public	OpenConglomerateScratchSpace(int[] format_ids)

Method Summary
public DataValueDescriptor[]	get_row_for_export() Return an empty template (possibly partial) row to be given back to a client.
public DataValueDescriptor[]	get_scratch_row() Return an empty template (possibly partial) row to be used and reused internally for processing. The main use of this is for qualifying rows where a row has not been provided by the client.
public DataValueDescriptor[]	get_template() Return a complete empty row.
public void	init(FormatableBitSet export_column_list) Initialize scratch space for reuse by possibly different template.

Constructor Detail

OpenConglomerateScratchSpace
public OpenConglomerateScratchSpace(int[] format_ids)(Code)
	Constructors for This class:

Method Detail

get_row_for_export

public DataValueDescriptor[] get_row_for_export() throws StandardException(Code)

Return an empty template (possibly partial) row to be given back to a client.

The main use of this is for fetchSet() and fetchNextGroup() which allocate rows and then give them back entirely to the caller.

The row to use.
exception:
StandardException - Standard exception policy.

get_scratch_row

public DataValueDescriptor[] get_scratch_row() throws StandardException(Code)

Return an empty template (possibly partial) row to be used and reused internally for processing.

The main use of this is for qualifying rows where a row has not been provided by the client. This routine cache's a single row for reuse by the caller, if the caller needs 2 concurrent scratch rows, some other mechanism must be used.

The row to use.
exception:
StandardException - Standard exception policy.

get_template

public DataValueDescriptor[] get_template() throws StandardException(Code)

Return a complete empty row.

The main use of this is for searching a tree where a complete copy of the row is needed for searching.

The template to use.
exception:
StandardException - Standard exception policy.

init
public void init(FormatableBitSet export_column_list)(Code)
	Initialize scratch space for reuse by possibly different template. Some data is only valid per statement.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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