[jira] [Created] (CALCITE-2900) RewriteRexShuttle generates wring type for structured type when visitInputRef

["Will Yu (JIRA)" <ji...@apache.org>]

Will Yu created CALCITE-2900:
--------------------------------

             Summary: RewriteRexShuttle generates wring type for structured type when visitInputRef
                 Key: CALCITE-2900
                 URL: https://issues.apache.org/jira/browse/CALCITE-2900
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.18.0
            Reporter: Will Yu


When we leverage Calcite to parse a SQL and generates a RelNode tree on top of a table with *structured* columns, Calcite throws an error about type mismatch shown at bottom.

After a bit of debugging, the issue is suspected to happen in RewriteRexShuttle.visitFieldAccess. When the input is RexInputRef, such as $36.target_column, the newField type is calculated based on ONLY the index 36, WITHOUT considering the offset of target_column. The result is new field type is the type of the first sub-column of column $36, which causes the type mismatch.

 

Error and stacktrace:

java.lang.AssertionError: type mismatch:
ref:
INTEGER NOT NULL
input:
VARCHAR CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary" NOT NULL

at org.apache.calcite.util.Litmus$1.fail(Litmus.java:31)
 at org.apache.calcite.plan.RelOptUtil.eq(RelOptUtil.java:1832)
 at org.apache.calcite.rex.RexChecker.visitInputRef(RexChecker.java:125)
 at org.apache.calcite.rex.RexChecker.visitInputRef(RexChecker.java:57)
 at org.apache.calcite.rex.RexInputRef.accept(RexInputRef.java:112)
 at org.apache.calcite.rel.core.Project.isValid(Project.java:186)
 at org.apache.calcite.rel.core.Project.<init>(Project.java:83)
 at org.apache.calcite.rel.logical.LogicalProject.<init>(LogicalProject.java:62)
 at org.apache.calcite.rel.logical.LogicalProject.create(LogicalProject.java:112)
 at org.apache.calcite.rel.logical.LogicalProject.create(LogicalProject.java:100)
 at org.apache.calcite.rel.core.RelFactories$ProjectFactoryImpl.createProject(RelFactories.java:140)
 at org.apache.calcite.tools.RelBuilder.project(RelBuilder.java:1248)
 at org.apache.calcite.tools.RelBuilder.projectNamed(RelBuilder.java:1304)
 at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewriteRel(RelStructuredTypeFlattener.java:506)
 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:759)
 at org.apache.calcite.rel.SingleRel.childrenAccept(SingleRel.java:72)
 at org.apache.calcite.rel.RelVisitor.visit(RelVisitor.java:44)
 at org.apache.calcite.sql2rel.RelStructuredTypeFlattener$RewriteRelVisitor.visit(RelStructuredTypeFlattener.java:754)
 at org.apache.calcite.sql2rel.RelStructuredTypeFlattener.rewrite(RelStructuredTypeFlattener.java:194)
 at org.apache.calcite.sql2rel.SqlToRelConverter.flattenTypes(SqlToRelConverter.java:466)
 at org.apache.calcite.prepare.PlannerImpl.rel(PlannerImpl.java:236)

 



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