Top Description Fields Constructors Methods
org.h2.expression

public final Class SequenceValue

extends Operation0
Class Inheritance
Imports
org.h2.command.Prepared, org.h2.engine.SessionLocal, org.h2.schema.Sequence, org.h2.value.TypeInfo, .Value
Wraps a sequence when used in a statement.

Field Summary

Modifier and TypeField and Description
private final boolean
current

private final Prepared
prepared

private final Sequence
sequence

Constructor Summary

AccessConstructor and Description
public
SequenceValue(Sequence
the sequence
sequence, Prepared
the owner command, or null
prepared)

Creates new instance of NEXT VALUE FOR expression.

public
SequenceValue(Sequence
the sequence
sequence)

Creates new instance of CURRENT VALUE FOR expression.

Method Summary

Modifier and TypeMethod and Description
public int
getCost()

Implements abstract org.h2.expression.Expression.getCost.

Estimate the cost to process the expression.

public TypeInfo
getType()

Implements abstract org.h2.expression.Expression.getType.

Implements org.h2.value.Typed.getType.

Returns the data type.

public StringBuilder
getUnenclosedSQL(StringBuilder
string builder
builder, int
formatting flags
sqlFlags)

Implements abstract org.h2.expression.Expression.getUnenclosedSQL.

Get the SQL statement of this expression.

public Value
getValue(SessionLocal
the session
session)

Implements abstract org.h2.expression.Expression.getValue.

Return the resulting value for the current row.

public boolean
isEverything(ExpressionVisitor
the visitor
visitor)

Implements abstract org.h2.expression.Expression.isEverything.

Check if this expression and all sub-expressions can fulfill a criteria.

Inherited from org.h2.expression.Operation0:
mapColumnsoptimizesetEvaluatableupdateAggregate

Field Detail

currentback to summary
private final boolean current
preparedback to summary
private final Prepared prepared
sequenceback to summary
private final Sequence sequence

Constructor Detail

SequenceValueback to summary
public SequenceValue(Sequence sequence, Prepared prepared)

Creates new instance of NEXT VALUE FOR expression.

Parameters
sequence:Sequence

the sequence

prepared:Prepared

the owner command, or null

SequenceValueback to summary
public SequenceValue(Sequence sequence)

Creates new instance of CURRENT VALUE FOR expression.

Parameters
sequence:Sequence

the sequence

Method Detail

getCostback to summary
public int getCost()

Implements abstract org.h2.expression.Expression.getCost.

Doc from org.h2.expression.Expression.getCost.

Estimate the cost to process the expression. Used when optimizing the query, to calculate the query plan with the lowest estimated cost.

Returns:int

the estimated cost

Annotations
@Override
getTypeback to summary
public TypeInfo getType()

Implements abstract org.h2.expression.Expression.getType.

Implements org.h2.value.Typed.getType.

Doc from org.h2.expression.Expression.getType.

Returns the data type. The data type may be unknown before the optimization phase.

Returns:TypeInfo

the data type

Annotations
@Override
getUnenclosedSQLback to summary
public StringBuilder getUnenclosedSQL(StringBuilder builder, int sqlFlags)

Implements abstract org.h2.expression.Expression.getUnenclosedSQL.

Doc from org.h2.expression.Expression.getUnenclosedSQL.

Get the SQL statement of this expression. This may not always be the original SQL statement, especially after optimization. Enclosing '(' and ')' are never appended.

Parameters
builder:StringBuilder

string builder

sqlFlags:int

formatting flags

Returns:StringBuilder

the specified string builder

Annotations
@Override
getValueback to summary
public Value getValue(SessionLocal session)

Implements abstract org.h2.expression.Expression.getValue.

Doc from org.h2.expression.Expression.getValue.

Return the resulting value for the current row.

Parameters
session:SessionLocal

the session

Returns:Value

the result

Annotations
@Override
isEverythingback to summary
public boolean isEverything(ExpressionVisitor visitor)

Implements abstract org.h2.expression.Expression.isEverything.

Doc from org.h2.expression.Expression.isEverything.

Check if this expression and all sub-expressions can fulfill a criteria. If any part returns false, the result is false.

Parameters
visitor:ExpressionVisitor

the visitor

Returns:boolean

if the criteria can be fulfilled

Annotations
@Override