org.teiid.query.processor.relational

Class SubqueryAwareEvaluator

java.lang.Object

org.teiid.query.eval.Evaluator

org.teiid.query.processor.relational.SubqueryAwareEvaluator

public class SubqueryAwareEvaluator
extends Evaluator

This utility handles the work of processing a subquery; certain types of processor nodes will use an instance of this class to do that work.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	SubqueryAwareEvaluator.SubqueryState

Nested classes/interfaces inherited from class org.teiid.query.eval.Evaluator

Evaluator.NameValuePair<T>

Field Summary

Fields inherited from class org.teiid.query.eval.Evaluator

context, dataMgr, elements, REGEX_RESERVED, SIMILAR_TO_REGEX

Constructor Summary

Constructors

Constructor and Description
SubqueryAwareEvaluator(Map elements, ProcessorDataManager dataMgr, CommandContext context, BufferManager manager)

Method Summary

Modifier and Type	Method and Description
void	close()
protected Object	evaluateProcedure(Function function, List<?> tuple, Object[] values) Implements procedure function handling.
protected Object	evaluatePushdown(Function function, List<?> tuple, Object[] values) Implements must pushdown function handling if supported by the source.
protected ValueIterator	evaluateSubquery(SubqueryContainer<?> container, List<?> tuple)
void	reset()

Methods inherited from class org.teiid.query.eval.Evaluator

compare, evaluate, evaluate, evaluate, evaluate, evaluateParameters, evaluateTVL, getInputStreamFactory, initialize, internalEvaluate, jsonArray

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SubqueryAwareEvaluator

public SubqueryAwareEvaluator(Map elements,
                              ProcessorDataManager dataMgr,
                              CommandContext context,
                              BufferManager manager)

Method Detail

reset

public void reset()

close

public void close()

evaluateSubquery

protected ValueIterator evaluateSubquery(SubqueryContainer<?> container,
                                         List<?> tuple)
                                  throws TeiidProcessingException,
                                         BlockedException,
                                         TeiidComponentException

Overrides:

evaluateSubquery in class Evaluator

Returns:

Throws:

TeiidProcessingException

BlockedException

TeiidComponentException

evaluateProcedure

protected Object evaluateProcedure(Function function,
                                   List<?> tuple,
                                   Object[] values)
                            throws TeiidComponentException,
                                   TeiidProcessingException

Implements procedure function handling. TODO: cache results

Overrides:

evaluateProcedure in class Evaluator

Throws:

TeiidComponentException

TeiidProcessingException

evaluatePushdown

protected Object evaluatePushdown(Function function,
                                  List<?> tuple,
                                  Object[] values)
                           throws TeiidComponentException,
                                  TeiidProcessingException

Implements must pushdown function handling if supported by the source. The basic strategy is to create a dummy subquery to represent the evaluation

Overrides:

evaluatePushdown in class Evaluator

Throws:

TeiidComponentException

TeiidProcessingException