Modifier and Type	Class and Description
pack-priv static class	QueryExpressionTable.CacheKey The key of the index cache for views.

Modifier and Type	Field and Description
private long	lastModificationCheck
private long	maxDataModificationId
private static final long	ROW_COUNT_APPROXIMATION
pack-priv ArrayList<Table>	tables
pack-priv Query	viewQuery

Access	Constructor and Description
pack-priv	QueryExpressionTable(Schema schema, int id, String name)

Method Summary

Modifier and Type	Method and Description
public final void	addDependencies(HashSet<DbObject> the current set of dependencies dependencies) Overrides org.h2.table.Table.addDependencies. Add all objects that this table depends on to the hash set.
public final Index	addIndex(SessionLocal the session session, String the name of the index indexName, int the id indexId, IndexColumn[] the index columns cols, int the count of unique columns uniqueColumnCount, IndexType the index type indexType, boolean whether this is a new index create, String the comment indexComment) Implements abstract org.h2.table.Table.addIndex. Create an index for this table
public final void	addRow(SessionLocal the session session, Row the row row) Implements abstract org.h2.table.Table.addRow. Add a row to the table and all indexes.
public final boolean	canGetRowCount(SessionLocal the session session) Implements abstract org.h2.table.Table.canGetRowCount. Check if the row count can be retrieved quickly.
public final boolean	canReference() Overrides org.h2.table.Table.canReference. Check if this table can be referenced.
public final void	checkSupportAlter() Implements abstract org.h2.table.Table.checkSupportAlter. Check if this table supports ALTER TABLE.
public final void	close(SessionLocal the session session) Implements abstract org.h2.table.Table.close. Close the table object and flush changes.
pack-priv abstract QueryExpressionIndex	createIndex(SessionLocal session, int[] masks)
public static List<Column>	Returns: a list of column object returned by withQuery createQueryColumnTemplateList(String[] - an optional list of column names (can be specified by WITH clause overriding usual select names) cols, Query - the query object we want the column list for theQuery) Creates a list of column templates from a query (usually from WITH query, but could be any query)
public final PlanItem	getBestPlanItem(SessionLocal the session session, int[] per-column comparison bit masks, null means 'always false', see constants in IndexCondition masks, TableFilter[] all joined table filters filters, int the current table filter index filter, SortOrder the sort order sortOrder, AllColumnsForPlan the set of all columns allColumnsSet) Overrides org.h2.table.Table.getBestPlanItem. Get the best plan for the given search mask.
public final ArrayList<Index>	getIndexes() Implements abstract org.h2.table.Table.getIndexes. Get all indexes for this table.
public long	getMaxDataModificationId() Implements abstract org.h2.table.Table.getMaxDataModificationId. Get the last data modification id.
public final int	Returns: the index of the first parameter getParameterOffset(ArrayList<Parameter> additional parameters additionalParameters) Get the index of the first parameter.
public final Query	getQuery()
public abstract QueryScope	Returns: the scope of this table getQueryScope() Returns the scope of this table
public final long	getRowCount(SessionLocal the session session) Implements abstract org.h2.table.Table.getRowCount. Get the row count for this table.
public final long	getRowCountApproximation(SessionLocal the session session) Implements abstract org.h2.table.Table.getRowCountApproximation. Get the approximated row count for this table.
public final Index	getScanIndex(SessionLocal the session session) Implements abstract org.h2.table.Table.getScanIndex. Get the scan index to iterate through all rows.
public Index	getScanIndex(SessionLocal the session session, int[] the search mask masks, TableFilter[] the table filters filters, int the filter index filter, SortOrder the sort order sortOrder, AllColumnsForPlan all columns allColumnsSet) Overrides org.h2.table.Table.getScanIndex. Get the scan index for this table.
public abstract Query	getTopQuery()
pack-priv Column[]	initColumns(SessionLocal session, Column[] columnTemplates, Query query, boolean isDerivedTable)
public boolean	isDeterministic() Implements abstract org.h2.table.Table.isDeterministic. Check if the table is deterministic.
public final boolean	isInsertable() Overrides org.h2.table.Table.isInsertable. Returns whether this table is insertable.
public boolean	isQueryComparable() Overrides org.h2.table.Table.isQueryComparable. Check whether the table (or view) contains no columns that prevent index conditions to be used.
public final boolean	isView() Overrides org.h2.table.Table.isView.
public final void	removeRow(SessionLocal the session session, Row the row row) Implements abstract org.h2.table.Table.removeRow. Remove a row from the table and all indexes.
public final long	truncate(SessionLocal the session session) Implements abstract org.h2.table.Table.truncate. Remove all rows from the table and indexes.

Inherited from org.h2.table.Table:: addConstraint addDependentMaterializedView addDependentView addSequence addSynonym addTrigger canDrop canTruncate checkDeadlock checkWritingAllowed compareValues convertInsertRow convertUpdateRow createRow doesColumnExist dropMultipleColumnsConstraintsAndIndexes findColumn findPrimaryKey fire fireAfterRow fireBeforeRow fireRow getCheckForeignKeyConstraints getChildren getColumn getColumn getColumn getColumns getCompareMode getConstraints getDependentMaterializedViews getDependentViews getDiskSpaceUsed getIdentityColumn getIndex getIndexForColumn getMainIndexColumn getNullRow getOnCommitDrop getOnCommitTruncate getPrimaryKey getRow getRowFactory getRowIdColumn getSQLTableType getTableType getTemplateRow getTemplateSimpleRow getTriggers getType getVisibleColumns hasSelectTrigger isGlobalTemporary isLockedExclusively isLockedExclusivelyBy isPersistData isPersistIndexes isRowLockable lock lockRow removeChildrenAndResources removeColumnExpressionsDependencies removeConstraint removeDependentMaterializedView removeDependentView removeIndex removeIndexOrTransferOwnership removeSequence removeSynonym removeTrigger rename renameColumn setCheckForeignKeyConstraints setColumns setOnCommitDrop setOnCommitTruncate unlock updateRow updateRows

Field Detail

lastModificationCheck	back to summary
private long lastModificationCheck

maxDataModificationId	back to summary
private long maxDataModificationId

ROW_COUNT_APPROXIMATION	back to summary
private static final long ROW_COUNT_APPROXIMATION

tables	back to summary
pack-priv ArrayList<Table> tables

viewQuery	back to summary
pack-priv Query viewQuery

Constructor Detail

QueryExpressionTable	back to summary
pack-priv QueryExpressionTable(Schema schema, int id, String name)

Method Detail

addDependencies	back to summary
public final void addDependencies(HashSet<DbObject> dependencies) Overrides org.h2.table.Table.addDependencies. Doc from org.h2.table.Table.addDependencies. Add all objects that this table depends on to the hash set. Parameters dependencies:HashSet<DbObject> the current set of dependencies Annotations @Override

addDependencies

back to summary

public final void addDependencies(HashSet<DbObject> dependencies)

Overrides org.h2.table.Table.addDependencies.

Doc from org.h2.table.Table.addDependencies.

Add all objects that this table depends on to the hash set.

Parameters

dependencies:HashSet<DbObject>: the current set of dependencies

Annotations

@Override

addIndex	back to summary
public final Index addIndex(SessionLocal session, String indexName, int indexId, IndexColumn[] cols, int uniqueColumnCount, IndexType indexType, boolean create, String indexComment) Implements abstract org.h2.table.Table.addIndex. Doc from org.h2.table.Table.addIndex. Create an index for this table Parameters session:SessionLocal the session indexName:String the name of the index indexId:int the id cols:IndexColumn[] the index columns uniqueColumnCount:int the count of unique columns indexType:IndexType the index type create:boolean whether this is a new index indexComment:String the comment Returns:Index the index Annotations @Override

addIndex

back to summary

public final Index addIndex(SessionLocal session, String indexName, int indexId, IndexColumn[] cols, int uniqueColumnCount, IndexType indexType, boolean create, String indexComment)

Implements abstract org.h2.table.Table.addIndex.

Doc from org.h2.table.Table.addIndex.

Create an index for this table

Parameters

session:SessionLocal: the session
indexName:String: the name of the index
indexId:int: the id
cols:IndexColumn[]: the index columns
uniqueColumnCount:int: the count of unique columns
indexType:IndexType: the index type
create:boolean: whether this is a new index
indexComment:String: the comment

Returns:Index

the index

Annotations

@Override

addRow	back to summary
public final void addRow(SessionLocal session, Row row) Implements abstract org.h2.table.Table.addRow. Doc from org.h2.table.Table.addRow. Add a row to the table and all indexes. Parameters session:SessionLocal the session row:Row the row Annotations @Override

addRow

back to summary

public final void addRow(SessionLocal session, Row row)

Implements abstract org.h2.table.Table.addRow.

Doc from org.h2.table.Table.addRow.

Add a row to the table and all indexes.

Parameters

session:SessionLocal: the session
row:Row: the row

Annotations

@Override

canGetRowCount	back to summary
public final boolean canGetRowCount(SessionLocal session) Implements abstract org.h2.table.Table.canGetRowCount. Doc from org.h2.table.Table.canGetRowCount. Check if the row count can be retrieved quickly. Parameters session:SessionLocal the session Returns:boolean true if it can Annotations @Override

canGetRowCount

back to summary

public final boolean canGetRowCount(SessionLocal session)

Implements abstract org.h2.table.Table.canGetRowCount.

Doc from org.h2.table.Table.canGetRowCount.

Check if the row count can be retrieved quickly.

Parameters

session:SessionLocal: the session

Returns:boolean

true if it can

Annotations

@Override

canReference	back to summary
public final boolean canReference() Overrides org.h2.table.Table.canReference. Doc from org.h2.table.Table.canReference. Check if this table can be referenced. Returns:boolean true if it can Annotations @Override

canReference

back to summary

public final boolean canReference()

Overrides org.h2.table.Table.canReference.

Doc from org.h2.table.Table.canReference.

Check if this table can be referenced.

Returns:boolean

true if it can

Annotations

@Override

checkSupportAlter	back to summary
public final void checkSupportAlter() Implements abstract org.h2.table.Table.checkSupportAlter. Doc from org.h2.table.Table.checkSupportAlter. Check if this table supports ALTER TABLE. Annotations @Override

checkSupportAlter

back to summary

public final void checkSupportAlter()

Implements abstract org.h2.table.Table.checkSupportAlter.

Doc from org.h2.table.Table.checkSupportAlter.

Check if this table supports ALTER TABLE.

Annotations

@Override

close	back to summary
public final void close(SessionLocal session) Implements abstract org.h2.table.Table.close. Doc from org.h2.table.Table.close. Close the table object and flush changes. Parameters session:SessionLocal the session Annotations @Override

back to summary

public final void close(SessionLocal session)

Implements abstract org.h2.table.Table.close.

Doc from org.h2.table.Table.close.

Close the table object and flush changes.

Parameters

session:SessionLocal: the session

Annotations

@Override

createIndex	back to summary
pack-priv abstract QueryExpressionIndex createIndex(SessionLocal session, int[] masks)

createQueryColumnTemplateList	back to summary
public static List<Column> createQueryColumnTemplateList(String[] cols, Query theQuery) Creates a list of column templates from a query (usually from WITH query, but could be any query) Parameters cols:String[] - an optional list of column names (can be specified by WITH clause overriding usual select names) theQuery:Query - the query object we want the column list for Returns:List<Column> a list of column object returned by withQuery

createQueryColumnTemplateList

back to summary

public static List<Column> createQueryColumnTemplateList(String[] cols, Query theQuery)

Creates a list of column templates from a query (usually from WITH query, but could be any query)

Parameters

cols:String[]: - an optional list of column names (can be specified by WITH clause overriding usual select names)
theQuery:Query: - the query object we want the column list for

Returns:List<Column>

a list of column object returned by withQuery

getBestPlanItem	back to summary
public final PlanItem getBestPlanItem(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet) Overrides org.h2.table.Table.getBestPlanItem. Doc from org.h2.table.Table.getBestPlanItem. Get the best plan for the given search mask. Parameters session:SessionLocal the session masks:int[] per-column comparison bit masks, null means 'always false', see constants in IndexCondition filters:TableFilter[] all joined table filters filter:int the current table filter index sortOrder:SortOrder the sort order allColumnsSet:AllColumnsForPlan the set of all columns Returns:PlanItem the plan item Annotations @Override

getBestPlanItem

back to summary

public final PlanItem getBestPlanItem(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet)

Overrides org.h2.table.Table.getBestPlanItem.

Doc from org.h2.table.Table.getBestPlanItem.

Get the best plan for the given search mask.

Parameters

session:SessionLocal: the session
masks:int[]: per-column comparison bit masks, null means 'always false', see constants in IndexCondition
filters:TableFilter[]: all joined table filters
filter:int: the current table filter index
sortOrder:SortOrder: the sort order
allColumnsSet:AllColumnsForPlan: the set of all columns

Returns:PlanItem

the plan item

Annotations

@Override

getIndexes	back to summary
public final ArrayList<Index> getIndexes() Implements abstract org.h2.table.Table.getIndexes. Doc from org.h2.table.Table.getIndexes. Get all indexes for this table. Returns:ArrayList<Index> the list of indexes Annotations @Override

getIndexes

back to summary

public final ArrayList<Index> getIndexes()

Implements abstract org.h2.table.Table.getIndexes.

Doc from org.h2.table.Table.getIndexes.

Get all indexes for this table.

Returns:ArrayList<Index>

the list of indexes

Annotations

@Override

getMaxDataModificationId	back to summary
public long getMaxDataModificationId() Implements abstract org.h2.table.Table.getMaxDataModificationId. Doc from org.h2.table.Table.getMaxDataModificationId. Get the last data modification id. Returns:long the modification id Annotations @Override

getMaxDataModificationId

back to summary

public long getMaxDataModificationId()

Implements abstract org.h2.table.Table.getMaxDataModificationId.

Doc from org.h2.table.Table.getMaxDataModificationId.

Get the last data modification id.

Returns:long

the modification id

Annotations

@Override

getParameterOffset	back to summary
public final int getParameterOffset(ArrayList<Parameter> additionalParameters) Get the index of the first parameter. Parameters additionalParameters:ArrayList<Parameter> additional parameters Returns:int the index of the first parameter

getParameterOffset

back to summary

public final int getParameterOffset(ArrayList<Parameter> additionalParameters)

Get the index of the first parameter.

Parameters

additionalParameters:ArrayList<Parameter>: additional parameters

Returns:int

the index of the first parameter

getQuery	back to summary
public final Query getQuery()

getQueryScope	back to summary
public abstract QueryScope getQueryScope() Returns the scope of this table Returns:QueryScope the scope of this table

getQueryScope

back to summary

public abstract QueryScope getQueryScope()

Returns the scope of this table

Returns:QueryScope: the scope of this table

getRowCount	back to summary
public final long getRowCount(SessionLocal session) Implements abstract org.h2.table.Table.getRowCount. Doc from org.h2.table.Table.getRowCount. Get the row count for this table. Parameters session:SessionLocal the session Returns:long the row count Annotations @Override

getRowCount

back to summary

public final long getRowCount(SessionLocal session)

Implements abstract org.h2.table.Table.getRowCount.

Doc from org.h2.table.Table.getRowCount.

Get the row count for this table.

Parameters

session:SessionLocal: the session

Returns:long

the row count

Annotations

@Override

getRowCountApproximation	back to summary
public final long getRowCountApproximation(SessionLocal session) Implements abstract org.h2.table.Table.getRowCountApproximation. Doc from org.h2.table.Table.getRowCountApproximation. Get the approximated row count for this table. Parameters session:SessionLocal the session Returns:long the approximated row count Annotations @Override

getRowCountApproximation

back to summary

public final long getRowCountApproximation(SessionLocal session)

Implements abstract org.h2.table.Table.getRowCountApproximation.

Doc from org.h2.table.Table.getRowCountApproximation.

Get the approximated row count for this table.

Parameters

session:SessionLocal: the session

Returns:long

the approximated row count

Annotations

@Override

getScanIndex	back to summary
public final Index getScanIndex(SessionLocal session) Implements abstract org.h2.table.Table.getScanIndex. Doc from org.h2.table.Table.getScanIndex. Get the scan index to iterate through all rows. Parameters session:SessionLocal the session Returns:Index the index Annotations @Override

getScanIndex

back to summary

public final Index getScanIndex(SessionLocal session)

Implements abstract org.h2.table.Table.getScanIndex.

Doc from org.h2.table.Table.getScanIndex.

Get the scan index to iterate through all rows.

Parameters

session:SessionLocal: the session

Returns:Index

the index

Annotations

@Override

getScanIndex	back to summary
public Index getScanIndex(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet) Overrides org.h2.table.Table.getScanIndex. Doc from org.h2.table.Table.getScanIndex. Get the scan index for this table. Parameters session:SessionLocal the session masks:int[] the search mask filters:TableFilter[] the table filters filter:int the filter index sortOrder:SortOrder the sort order allColumnsSet:AllColumnsForPlan all columns Returns:Index the scan index Annotations @Override

getScanIndex

back to summary

public Index getScanIndex(SessionLocal session, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder, AllColumnsForPlan allColumnsSet)

Overrides org.h2.table.Table.getScanIndex.

Doc from org.h2.table.Table.getScanIndex.

Get the scan index for this table.

Parameters

session:SessionLocal: the session
masks:int[]: the search mask
filters:TableFilter[]: the table filters
filter:int: the filter index
sortOrder:SortOrder: the sort order
allColumnsSet:AllColumnsForPlan: all columns

Returns:Index

the scan index

Annotations

@Override

getTopQuery	back to summary
public abstract Query getTopQuery()

initColumns	back to summary
pack-priv Column[] initColumns(SessionLocal session, Column[] columnTemplates, Query query, boolean isDerivedTable)

isDeterministic	back to summary
public boolean isDeterministic() Implements abstract org.h2.table.Table.isDeterministic. Doc from org.h2.table.Table.isDeterministic. Check if the table is deterministic. Returns:boolean true if it is Annotations @Override

isDeterministic

back to summary

public boolean isDeterministic()

Implements abstract org.h2.table.Table.isDeterministic.

Doc from org.h2.table.Table.isDeterministic.

Check if the table is deterministic.

Returns:boolean

true if it is

Annotations

@Override

isInsertable	back to summary
public final boolean isInsertable() Overrides org.h2.table.Table.isInsertable. Doc from org.h2.table.Table.isInsertable. Returns whether this table is insertable. Returns:boolean whether this table is insertable Annotations @Override

isInsertable

back to summary

public final boolean isInsertable()

Overrides org.h2.table.Table.isInsertable.

Doc from org.h2.table.Table.isInsertable.

Returns whether this table is insertable.

Returns:boolean

whether this table is insertable

Annotations

@Override

isQueryComparable	back to summary
public boolean isQueryComparable() Overrides org.h2.table.Table.isQueryComparable. Doc from org.h2.table.Table.isQueryComparable. Check whether the table (or view) contains no columns that prevent index conditions to be used. For example, a view that contains the ROWNUM() pseudo-column prevents this. Returns:boolean true if the table contains no query-comparable column Annotations @Override

isQueryComparable

back to summary

public boolean isQueryComparable()

Overrides org.h2.table.Table.isQueryComparable.

Doc from org.h2.table.Table.isQueryComparable.

Check whether the table (or view) contains no columns that prevent index conditions to be used. For example, a view that contains the ROWNUM() pseudo-column prevents this.

Returns:boolean

true if the table contains no query-comparable column

Annotations

@Override

isView	back to summary
public final boolean isView() Overrides org.h2.table.Table.isView. Annotations @Override

isView

back to summary

public final boolean isView()

Overrides org.h2.table.Table.isView.

Annotations

@Override

removeRow	back to summary
public final void removeRow(SessionLocal session, Row row) Implements abstract org.h2.table.Table.removeRow. Doc from org.h2.table.Table.removeRow. Remove a row from the table and all indexes. Parameters session:SessionLocal the session row:Row the row Annotations @Override

removeRow

back to summary

public final void removeRow(SessionLocal session, Row row)

Implements abstract org.h2.table.Table.removeRow.

Doc from org.h2.table.Table.removeRow.

Remove a row from the table and all indexes.

Parameters

session:SessionLocal: the session
row:Row: the row

Annotations

@Override

truncate	back to summary
public final long truncate(SessionLocal session) Implements abstract org.h2.table.Table.truncate. Doc from org.h2.table.Table.truncate. Remove all rows from the table and indexes. Parameters session:SessionLocal the session Returns:long number of removed rows, possibly including uncommitted rows Annotations @Override

truncate

back to summary

public final long truncate(SessionLocal session)

Implements abstract org.h2.table.Table.truncate.

Doc from org.h2.table.Table.truncate.

Remove all rows from the table and indexes.

Parameters

session:SessionLocal: the session

Returns:long

number of removed rows, possibly including uncommitted rows

Annotations

@Override

org.h2.table back to summary

pack-priv final Class QueryExpressionTable.CacheKey

Class Inheritance

extends Object

java.lang.Object
org.h2.table.QueryExpressionTable.CacheKey

The key of the index cache for views.

Field Summary

Modifier and Type	Field and Description
private final int[]	masks
private final QueryExpressionTable	queryExpressionTable

Constructor Summary

Access	Constructor and Description
pack-priv	CacheKey(int[] masks, QueryExpressionTable queryExpressionTable)

Method Summary

Modifier and Type	Method and Description
public boolean	equals(Object the reference object with which to compare. obj) Overrides java.lang.Object.equals. Indicates whether some other object is "equal to" this one.
public int	hashCode() Overrides java.lang.Object.hashCode. Returns a hash code value for this object.

Inherited from java.lang.Object:: clone finalize getClass notify notifyAll toString wait wait wait

Field Detail

masks	back to summary
private final int[] masks

queryExpressionTable	back to summary
private final QueryExpressionTable queryExpressionTable

Constructor Detail

CacheKey	back to summary
pack-priv CacheKey(int[] masks, QueryExpressionTable queryExpressionTable)

Method Detail

equals back to summary

equals	back to summary
public boolean equals(Object obj) Overrides java.lang.Object.equals. Doc from java.lang.Object.equals. Indicates whether some other object is "equal to" this one. The `equals` method implements an equivalence relation on non-null object references: It is reflexive: for any non-null reference value `x`, `x.equals(x)` should return `true`. It is symmetric: for any non-null reference values `x` and `y`, `x.equals(y)` should return `true` if and only if `y.equals(x)` returns `true`. It is transitive: for any non-null reference values `x`, `y`, and `z`, if `x.equals(y)` returns `true` and `y.equals(z)` returns `true`, then `x.equals(z)` should return `true`. It is consistent: for any non-null reference values `x` and `y`, multiple invocations of `x.equals(y)` consistently return `true` or consistently return `false`, provided no information used in `equals` comparisons on the objects is modified. For any non-null reference value `x`, `x.equals(null)` should return `false`. An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes. Parameters obj:Object the reference object with which to compare. Returns:boolean `true` if this object is the same as the obj argument; `false` otherwise. Annotations @Override

public boolean equals(Object obj)

Overrides java.lang.Object.equals.

Doc from java.lang.Object.equals.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

It is reflexive: for any non-null reference value x, x.equals(x) should return true.
It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
For any non-null reference value x, x.equals(null) should return false.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters

obj:Object: the reference object with which to compare.

Returns:boolean

true if this object is the same as the obj argument; false otherwise.

Annotations

@Override

hashCode back to summary

hashCode	back to summary
public int hashCode() Overrides java.lang.Object.hashCode. Doc from java.lang.Object.hashCode. Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by `java.util.HashMap`. The general contract of `hashCode` is: Whenever it is invoked on the same object more than once during an execution of a Java application, the `hashCode` method must consistently return the same integer, provided no information used in `equals` comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application. If two objects are equal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce the same integer result. It is not required that if two objects are unequal according to the `equals` method, then calling the `hashCode` method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables. Returns:int a hash code value for this object Annotations @Override

public int hashCode()

Overrides java.lang.Object.hashCode.

Doc from java.lang.Object.hashCode.

Returns a hash code value for this object. This method is supported for the benefit of hash tables such as those provided by java.util.HashMap.

The general contract of hashCode is:

Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
If two objects are equal according to the equals method, then calling the hashCode method on each of the two objects must produce the same integer result.
It is not required that if two objects are unequal according to the equals method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

Returns:int

a hash code value for this object

Annotations

@Override

public abstract Class QueryExpressionTable

Nested and Inner Type Summary

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail

pack-priv final Class QueryExpressionTable.CacheKey

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail