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https://issues.apache.org/jira/browse/CALCITE-2220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16409204#comment-16409204
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Shuyi Chen commented on CALCITE-2220:
-------------------------------------
[~julianhyde] , can you help take a look at this JIRA and PR?
> Wrong ordinal when flattening multiple input records during converting to REL
> -----------------------------------------------------------------------------
>
> Key: CALCITE-2220
> URL: https://issues.apache.org/jira/browse/CALCITE-2220
> Project: Calcite
> Issue Type: Task
> Components: core
> Reporter: Shuyi Chen
> Assignee: Shuyi Chen
> Priority: Major
>
> *Issue can be reproduced as follows*:
> MockTable deptNestedTable =
> MockTable.create(this, salesSchema, "DEPT_NESTED", false, 4);
> deptNestedTable.addColumn("DEPTNO", f.intType, true);
> deptNestedTable.addColumn("NAME", f.varchar10Type);
> deptNestedTable.addColumn("SKILLRECORD", f.skillRecordType);
> deptNestedTable.addColumn("EMPLOYEES", f.empListType);
> registerTable(deptNestedTable);
> Run the following test:
> @Test public void testArrayOfRecord() {
> sql("select employees[1] from dept_nested").ok();
> }
> The following error gets thrown when run:
> java.lang.AssertionError: type mismatch:
> ref:
> RecordType(INTEGER NOT NULL EMPNO, VARCHAR(10) CHARACTER SET "ISO-8859-1"
> COLLATE "ISO-8859-1$en_US$primary" NOT NULL ENAME, RecordType(VARCHAR(10)
> CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary" NOT NULL TYPE,
> VARCHAR(20) CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary" NOT
> NULL DESC) NOT NULL ARRAY NOT NULL SKILLS) NOT NULL ARRAY NOT NULL
> input:
> VARCHAR(20) CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary" NOT
> NULL
> at org.apache.calcite.util.Litmus$1.fail(Litmus.java:31)
> at org.apache.calcite.plan.RelOptUtil.eq(RelOptUtil.java:1838)
> at org.apache.calcite.rex.RexChecker.visitInputRef(RexChecker.java:125)
> at org.apache.calcite.rex.RexChecker.visitInputRef(RexChecker.java:57)
> at org.apache.calcite.rex.RexInputRef.accept(RexInputRef.java:112)
> at org.apache.calcite.rex.RexChecker.visitCall(RexChecker.java:140)
> at org.apache.calcite.rex.RexChecker.visitCall(RexChecker.java:57)
> at org.apache.calcite.rex.RexCall.accept(RexCall.java:107)
> at
> org.apache.calcite.rex.RexVisitorImpl.visitFieldAccess(RexVisitorImpl.java:98)
> at
> org.apache.calcite.rex.RexChecker.visitFieldAccess(RexChecker.java:149)
> at
> org.apache.calcite.rex.RexChecker.visitFieldAccess(RexChecker.java:57)
> at org.apache.calcite.rex.RexFieldAccess.accept(RexFieldAccess.java:81)
> at org.apache.calcite.rel.core.Project.isValid(Project.java:187)
> at org.apache.calcite.rel.core.Project.<init>(Project.java:84)
> at
> org.apache.calcite.rel.logical.LogicalProject.<init>(LogicalProject.java:65)
> at
> org.apache.calcite.rel.logical.LogicalProject.create(LogicalProject.java:120)
> at
> org.apache.calcite.rel.logical.LogicalProject.create(LogicalProject.java:103)
> at
> org.apache.calcite.rel.core.RelFactories$ProjectFactoryImpl.createProject(RelFactories.java:127)
> at org.apache.calcite.tools.RelBuilder.project(RelBuilder.java:1064)
> at
> org.apache.calcite.plan.RelOptUtil.createProject(RelOptUtil.java:2956)
> at
> org.apache.calcite.plan.RelOptUtil.createProject(RelOptUtil.java:2873)
> at
> org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewriteRel(RelStructuredTypeFlattener.java:477)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.calcite.util.ReflectUtil.invokeVisitorInternal(ReflectUtil.java:257)
> at
> org.apache.calcite.util.ReflectUtil.invokeVisitor(ReflectUtil.java:214)
> at
> org.apache.calcite.util.ReflectUtil$1.invokeVisitor(ReflectUtil.java:464)
> at
> org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRelVisitor.visit(RelStructuredTypeFlattener.java:721)
> at
> org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewrite(RelStructuredTypeFlattener.java:177)
> at
> org.apache.calcite.sql2rel.SqlToRelConverter.flattenTypes(SqlToRelConverter.java:462)
> at
> org.apache.calcite.test.SqlToRelTestBase$TesterImpl.convertSqlToRel(SqlToRelTestBase.java:585)
> at
> org.apache.calcite.test.SqlToRelTestBase$TesterImpl.assertConvertsTo(SqlToRelTestBase.java:690)
> at
> org.apache.calcite.test.SqlToRelConverterTest$Sql.convertsTo(SqlToRelConverterTest.java:2784)
> at
> org.apache.calcite.test.SqlToRelConverterTest$Sql.ok(SqlToRelConverterTest.java:2776)
> at
> org.apache.calcite.test.SqlToRelConverterTest.testArrayOfRecord(SqlToRelConverterTest.java:1059)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at
> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at
> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at
> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at
> org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:117)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
> *Below is a brief analysis*:
> Calcite is trying to remove all structured type in the plan right below, so
> optimizer and codegen rules never have to deal with structured types.
> LogicalProject(EXPR$0=[ITEM($3, 1)])
> LogicalTableScan(table=[[CATALOG, SALES, DEPT_NESTED]])
> First, it flatten the LogicalTableScan, and generate the following:
> LogicalProject(DEPTNO=[$0], NAME=[$1], TYPE=[$2.TYPE], DESC=[$2.DESC],
> EMPLOYEES=[$3])
> LogicalTableScan(table=[[CATALOG, SALES, DEPT_NESTED]])
> Then it tries to flatten "LogicalProject(EXPR$0=[ITEM($3, 1)])", and generate
> the following:
> LogicalProject(EXPR$0$0=[ITEM($3, 1).EMPNO], EXPR$0$1=[ITEM($3, 1).ENAME],
> EXPR$0$2=[ITEM($3, 1).SKILLS])
> However, when it combines the 2 flattening results, it did not correctly
> adjust the ordinal post-flattening, which should be $4 now, not $3. So this
> cause the exception since it is a type mismatch.
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