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java.lang.Objectorg.objectweb.medor.eval.lib.UnnestEvaluatedTC
This class represent a TupleCollection Result of the Unnest Operation. We don't store buffers in this operation because all Tuples of the sub TupleCollection will be in this TupleCollection, there no filtering.
Constructor Summary | |
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UnnestEvaluatedTC(UnnestQueryNode unnestQueryTree,
NodeEvaluator subNodeEvaluator,
ParameterOperand[] parameters)
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Method Summary | |
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int |
card()
|
void |
close()
It closes the TupleCollection, relaeases used resources (example : ResultSet). |
void |
first()
Moves the cursor to the first Tuple, row number 1. |
TupleStructure |
getMetaData()
It contains metadata of fields wich will be projected |
int |
getRow()
Retrieves the current row Number. |
Tuple |
getTuple()
Returns the Tuple value of the current row of this TupleCollection object. |
Tuple |
getTuple(int numTuple)
Returns the Tuple value of the designeted row of this TupleCollection object. |
boolean |
isEmpty()
Tell whether the current TupleCollection Object is empty or no. |
boolean |
isLast()
Indicates whether the cursor is on the last row of this TupleCollection object. |
boolean |
next()
Moves the cursor down one row from its current position to the next tuple of this TupleCollection object. |
boolean |
row(int row)
Moves the cursor to the given row number in this TupleCollection object. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public UnnestEvaluatedTC(UnnestQueryNode unnestQueryTree, NodeEvaluator subNodeEvaluator, ParameterOperand[] parameters) throws MedorException
Method Detail |
public void close() throws MedorException
TupleCollection
close
in interface TupleCollection
MedorException
public TupleStructure getMetaData() throws MedorException
getMetaData
in interface TupleCollection
MedorException
- if a data source access error occurspublic boolean isLast() throws MedorException
TupleCollection
isLast
in interface TupleCollection
MedorException
- if data source access errorpublic boolean next() throws MedorException
TupleCollection
next
in interface TupleCollection
MedorException
- if data source access errorpublic void first() throws MedorException
TupleCollection
first
in interface TupleCollection
MedorException
- if data source access errorpublic int getRow() throws MedorException
TupleCollection
getRow
in interface TupleCollection
MedorException
- if data source access error.public Tuple getTuple() throws MedorException
TupleCollection
getTuple
in interface TupleCollection
MedorException
- if data source access error.public Tuple getTuple(int numTuple) throws MedorException
TupleCollection
getTuple
in interface TupleCollection
numTuple
- :int
MedorException
- if data source access error.public boolean row(int row) throws MedorException
TupleCollection
row
in interface TupleCollection
MedorException
- if row number is invelid or data source access errorpublic int card() throws MedorException
MedorException
public boolean isEmpty() throws MedorException
TupleCollection
isEmpty
in interface TupleCollection
MedorException
- if data source access error.
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