org.teiid.query.processor.xml
Class ExecStagingTableInstruction

java.lang.Object
  org.teiid.query.processor.xml.ProcessorInstruction
      org.teiid.query.processor.xml.ExecStagingTableInstruction

public class ExecStagingTableInstruction
extends ProcessorInstruction

This instruction is to start loading a staging table. The difference between the loading the staging table and execute sql node is that sql node will capture the results and save them in the context object, where as staging does not care about the results, beacuse they are actully stored in the temp table store, will be accessed by required query directly from there, as these results are nothing do with producing the document directly. NOTE: In future we can improve this to load parallelly, if there are more than single staging table defined on the mapping document

Constructor Summary

ExecStagingTableInstruction(java.lang.String resultName, ResultSetInfo info)

Method Summary

PlanNode	getDescriptionProperties()
org.teiid.query.processor.xml.XMLContext	process(XMLProcessorEnvironment env, org.teiid.query.processor.xml.XMLContext context) Allow this ProcessorInstruction to do whatever processing it needs, and to in turn manipulate the running program.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ExecStagingTableInstruction

public ExecStagingTableInstruction(java.lang.String resultName,
                                   ResultSetInfo info)

Method Detail

process

public org.teiid.query.processor.xml.XMLContext process(XMLProcessorEnvironment env,
                                                        org.teiid.query.processor.xml.XMLContext context)
                                                 throws BlockedException,
                                                        TeiidComponentException,
                                                        TeiidProcessingException

Description copied from class: ProcessorInstruction

Allow this ProcessorInstruction to do whatever processing it needs, and to in turn manipulate the running program. A typical instruction should simply increment the program counter of the current program, but specialized instructions may add sub programs to the stack or not increment the counter (so that they are executed again.)

Specified by:

process in class ProcessorInstruction

Parameters:

env - instance of ProcessorEnvironment which is being used for the processing of the XML document model query

Throws:

BlockedException - if data is not available now but may be at a later time

TeiidComponentException - for non-business exception

TeiidProcessingException - for business exception due to user input or model

See Also:

ProcessorInstruction.process(org.teiid.query.processor.xml.XMLProcessorEnvironment, org.teiid.query.processor.xml.XMLContext)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getDescriptionProperties

public PlanNode getDescriptionProperties()

Specified by:

getDescriptionProperties in class ProcessorInstruction