com.metamatrix.query.processor.relational
Class SelectNode
java.lang.Object
com.metamatrix.query.processor.relational.RelationalNode
com.metamatrix.query.processor.relational.SubqueryAwareRelationalNode
com.metamatrix.query.processor.relational.SelectNode
- All Implemented Interfaces:
- Describable, java.lang.Cloneable
public class SelectNode
- extends SubqueryAwareRelationalNode
Fields inherited from interface com.metamatrix.query.processor.Describable |
PROP_BINDINGS, PROP_CHILDREN, PROP_CONDITIONS, PROP_CRITERIA, PROP_DATA_COL, PROP_DEFAULT, PROP_DEFAULT_PROGRAM, PROP_ELSE, PROP_ENCODING, PROP_EXECUTION_PLAN, PROP_EXPRESSION, PROP_FORMATTED, PROP_GROUP, PROP_GROUP_COLS, PROP_IN_MEMORY, PROP_INTO_GROUP, PROP_IS_STAGING, PROP_JOIN_CRITERIA, PROP_JOIN_STRATEGY, PROP_JOIN_TYPE, PROP_MESSAGE, PROP_MODEL_NAME, PROP_NAMESPACE, PROP_NAMESPACE_DECL, PROP_NODE_COST_ESTIMATES, PROP_NODE_STATS_LIST, PROP_NODE_STATS_PROPS, PROP_OPTIONAL, PROP_OUTPUT_COLS, PROP_PROGRAM, PROP_PROGRAMS, PROP_RECURSE_DIR, PROP_REMOVE_DUPS, PROP_RESULT_SET, PROP_ROW_LIMIT, PROP_ROW_OFFSET, PROP_SELECT_COLS, PROP_SORT_COLS, PROP_SQL, PROP_TAG, PROP_THEN, PROP_TYPE, PROP_VARIABLE |
Methods inherited from class com.metamatrix.query.processor.relational.RelationalNode |
addBatchRow, addChild, copy, createLookupMap, getBatchSize, getBufferManager, getChildDescriptionProperties, getChildPlans, getChildren, getClassName, getConnectionID, getContext, getDataManager, getElements, getEstimateNodeCardinality, getID, getNodeStatistics, getParent, hasPendingRows, isBatchFull, isClosed, nextBatch, nodeToString, open, projectTuple, pullBatch, setContext, setElements, setEstimateDepAccessCardinality, setEstimateDepJoinCost, setEstimateJoinCost, setEstimateNodeCardinality, setEstimateNodeSetSize, setID, setParent, terminateBatches, toString |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
SelectNode
public SelectNode(int nodeID)
reset
public void reset()
- Overrides:
reset
in class SubqueryAwareRelationalNode
setCriteria
public void setCriteria(Criteria criteria)
getCriteria
public Criteria getCriteria()
initialize
public void initialize(CommandContext context,
BufferManager bufferManager,
ProcessorDataManager dataMgr)
- Overrides:
initialize
in class RelationalNode
nextBatchDirect
public TupleBatch nextBatchDirect()
throws BlockedException,
MetaMatrixComponentException,
MetaMatrixProcessingException
- Description copied from class:
RelationalNode
- Template method for subclasses to implement.
- Specified by:
nextBatchDirect
in class RelationalNode
- Returns:
-
- Throws:
BlockedException
MetaMatrixComponentException
MetaMatrixProcessingException
- if exception related to user input occured- See Also:
RelationalNode.nextBatchDirect()
getNodeString
protected void getNodeString(java.lang.StringBuffer str)
- Overrides:
getNodeString
in class RelationalNode
clone
public java.lang.Object clone()
- Description copied from class:
RelationalNode
- All the implementation of Cloneable interface need to implement clone() method.
The plan is only clonable in the pre-execution stage, not the execution state
(things like program state, result sets, etc). It's only safe to call that method in between query processings,
in other words, it's only safe to call clone() on a plan after nextTuple() returns null,
meaning the plan has finished processing.
- Specified by:
clone
in class RelationalNode
copy
protected void copy(SelectNode source,
SelectNode target)
getDescriptionProperties
public java.util.Map getDescriptionProperties()
- Description copied from interface:
Describable
- Get a description as a set of properties of primitive types such
as String, Integer, etc.
- Specified by:
getDescriptionProperties
in interface Describable
- Overrides:
getDescriptionProperties
in class RelationalNode
- Returns:
- Map of properties
getLanguageObjects
public java.util.Collection<? extends LanguageObject> getLanguageObjects()
- Overrides:
getLanguageObjects
in class RelationalNode
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