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From "Ali Alsuliman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ASTERIXDB-2011) Subquery as index when selecting element from a list
Date Wed, 02 Aug 2017 21:31:00 GMT
Ali Alsuliman created ASTERIXDB-2011:
----------------------------------------

             Summary: Subquery as index when selecting element from a list
                 Key: ASTERIXDB-2011
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-2011
             Project: Apache AsterixDB
          Issue Type: Bug
          Components: COMP - Compiler
            Reporter: Ali Alsuliman


These are some examples where an internal error (null pointer exception) occurs
(["a", "b", "c"])[  (SELECT * FROM [1,2] AS foo)[0]   ];
(["a", "b", "c"])[  (SELECT value count(*) FROM Users)  ]; (Users dataset is empty and would
return 0. So it's within the bound of the list)

Here is the log:
java.lang.NullPointerException
	at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.getActualType(TypeComputeUtils.java:186)
	at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.getActualType(TypeComputeUtils.java:165)
	at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.resolveResultType(TypeComputeUtils.java:85)
	at org.apache.asterix.om.typecomputer.base.AbstractResultTypeComputer.computeType(AbstractResultTypeComputer.java:42)
	at org.apache.asterix.dataflow.data.common.ExpressionTypeComputer.getTypeForFunction(ExpressionTypeComputer.java:80)
	at org.apache.asterix.dataflow.data.common.ExpressionTypeComputer.getType(ExpressionTypeComputer.java:53)
	at org.apache.hyracks.algebricks.core.algebra.operators.logical.AssignOperator.computeOutputTypeEnvironment(AssignOperator.java:92)
	at org.apache.hyracks.algebricks.core.rewriter.base.AlgebricksOptimizationContext.computeAndSetTypeEnvironmentForOperator(AlgebricksOptimizationContext.java:298)
	at org.apache.hyracks.algebricks.rewriter.rules.InferTypesRule.rewritePost(InferTypesRule.java:42)
	at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:126)
	at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:100)
	at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:100)
	at org.apache.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialOnceRuleController.rewriteWithRuleCollection(SequentialOnceRuleController.java:44)
	at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.runOptimizationSets(HeuristicOptimizer.java:102)
	at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.optimize(HeuristicOptimizer.java:82)
	at org.apache.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder$1$1.optimize(HeuristicCompilerFactoryBuilder.java:90)
	at org.apache.asterix.api.common.APIFramework.compileQuery(APIFramework.java:267)
	at org.apache.asterix.app.translator.QueryTranslator.rewriteCompileQuery(QueryTranslator.java:1805)
	at org.apache.asterix.app.translator.QueryTranslator.lambda$handleQuery$1(QueryTranslator.java:2290)
	at org.apache.asterix.app.translator.QueryTranslator.createAndRunJob(QueryTranslator.java:2390)
	at org.apache.asterix.app.translator.QueryTranslator.deliverResult(QueryTranslator.java:2323)
	at org.apache.asterix.app.translator.QueryTranslator.handleQuery(QueryTranslator.java:2302)
	at org.apache.asterix.app.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:370)
	at org.apache.asterix.app.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:253)
	at org.apache.asterix.api.http.server.ApiServlet.post(ApiServlet.java:153)
	at org.apache.hyracks.http.server.AbstractServlet.handle(AbstractServlet.java:78)
	at org.apache.hyracks.http.server.HttpRequestHandler.handle(HttpRequestHandler.java:70)
	at org.apache.hyracks.http.server.HttpRequestHandler.call(HttpRequestHandler.java:55)
	at org.apache.hyracks.http.server.HttpRequestHandler.call(HttpRequestHandler.java:36)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

java.lang.NullPointerException
	at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.getActualType(TypeComputeUtils.java:186)
	at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.getActualType(TypeComputeUtils.java:165)
	at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.resolveResultType(TypeComputeUtils.java:85)
	at org.apache.asterix.om.typecomputer.base.AbstractResultTypeComputer.computeType(AbstractResultTypeComputer.java:42)
	at org.apache.asterix.dataflow.data.common.ExpressionTypeComputer.getTypeForFunction(ExpressionTypeComputer.java:80)
	at org.apache.asterix.dataflow.data.common.ExpressionTypeComputer.getType(ExpressionTypeComputer.java:53)
	at org.apache.hyracks.algebricks.core.algebra.operators.logical.AssignOperator.computeOutputTypeEnvironment(AssignOperator.java:92)
	at org.apache.hyracks.algebricks.core.rewriter.base.AlgebricksOptimizationContext.computeAndSetTypeEnvironmentForOperator(AlgebricksOptimizationContext.java:298)
	at org.apache.hyracks.algebricks.rewriter.rules.InferTypesRule.rewritePost(InferTypesRule.java:42)
	at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:126)
	at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:100)
	at org.apache.hyracks.algebricks.core.rewriter.base.AbstractRuleController.rewriteOperatorRef(AbstractRuleController.java:100)
	at org.apache.hyracks.algebricks.compiler.rewriter.rulecontrollers.SequentialOnceRuleController.rewriteWithRuleCollection(SequentialOnceRuleController.java:44)
	at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.runOptimizationSets(HeuristicOptimizer.java:102)
	at org.apache.hyracks.algebricks.core.rewriter.base.HeuristicOptimizer.optimize(HeuristicOptimizer.java:82)
	at org.apache.hyracks.algebricks.compiler.api.HeuristicCompilerFactoryBuilder$1$1.optimize(HeuristicCompilerFactoryBuilder.java:90)
	at org.apache.asterix.api.common.APIFramework.compileQuery(APIFramework.java:267)
	at org.apache.asterix.app.translator.QueryTranslator.rewriteCompileQuery(QueryTranslator.java:1805)
	at org.apache.asterix.app.translator.QueryTranslator.lambda$handleQuery$1(QueryTranslator.java:2290)
	at org.apache.asterix.app.translator.QueryTranslator.createAndRunJob(QueryTranslator.java:2390)
	at org.apache.asterix.app.translator.QueryTranslator.deliverResult(QueryTranslator.java:2323)
	at org.apache.asterix.app.translator.QueryTranslator.handleQuery(QueryTranslator.java:2302)
	at org.apache.asterix.app.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:370)
	at org.apache.asterix.app.translator.QueryTranslator.compileAndExecute(QueryTranslator.java:253)
	at org.apache.asterix.api.http.server.ApiServlet.post(ApiServlet.java:153)
	at org.apache.hyracks.http.server.AbstractServlet.handle(AbstractServlet.java:78)
	at org.apache.hyracks.http.server.HttpRequestHandler.handle(HttpRequestHandler.java:70)
	at org.apache.hyracks.http.server.HttpRequestHandler.call(HttpRequestHandler.java:55)
	at org.apache.hyracks.http.server.HttpRequestHandler.call(HttpRequestHandler.java:36)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)



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