Examples of org.teiid.query.processor.xml.ExecStagingTableInstruction

org.teiid.query.processor.xml.ExecStagingTableInstruction

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

        for (final Iterator i = stagingTables.iterator(); i.hasNext();) {
            final String table = (String)i.next();
            Program currentProgram = (Program)programStack.peek();


            // load staging
            currentProgram.addInstruction(new ExecStagingTableInstruction(table, planEnv.getStagingTableResultsInfo(table)));
            
            // unload sttaging
            String unloadName = planEnv.unLoadResultName(table);
            cleanupProgram.addInstruction(new ExecStagingTableInstruction(unloadName, planEnv.getStagingTableResultsInfo(unloadName)));
        } // for
    }

Related Classes of org.teiid.query.processor.xml.ExecStagingTableInstruction

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