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https://issues.apache.org/jira/browse/CALCITE-4579?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-4579:
---------------------------------
Summary: Piglet throws ClassCastException if Pig Latin script contains
FLATTEN or STRSPLIT operators (was: In Piglet, conversion of Pig Latin scripts
that contain FLATTEN and STRSPLIT operators fails with ClassCastException)
> Piglet throws ClassCastException if Pig Latin script contains FLATTEN or
> STRSPLIT operators
> -------------------------------------------------------------------------------------------
>
> Key: CALCITE-4579
> URL: https://issues.apache.org/jira/browse/CALCITE-4579
> Project: Calcite
> Issue Type: Bug
> Components: piglet
> Reporter: mahesh kumar behera
> Assignee: Julian Hyde
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.27.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> In the piglet component, while converting a Pig Latin script to SQL, the
> conversion expects the child to be a SqlIdentifier. But a SqlBasicCall is
> returned.
> Script
> {code:java}
> A = LOAD 'scott.DEPT' as (DEPTNO:int, DNAME:chararray, LOC:CHARARRAY);
> B = FOREACH A GENERATE FLATTEN(STRSPLIT(DNAME, ',')) as NAMES;
> {code}
> {noformat}
> java.lang.ClassCastException: org.apache.calcite.sql.SqlBasicCall cannot
> be cast to org.apache.calcite.sql.SqlIdentifier
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:720)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverter.visit(RelToSqlConverter.java:351)
> at org.apache.calcite.util.ReflectUtil$2.invoke(ReflectUtil.java:531)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverter.dispatch(RelToSqlConverter.java:134)
> at
> org.apache.calcite.rel.rel2sql.RelToSqlConverter.visitInput(RelToSqlConverter.java:142)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.visitInput(SqlImplementor.java:185)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.visitInput(SqlImplementor.java:173)
> at
> org.apache.calcite.rel.rel2sql.SqlImplementor.visitRoot(SqlImplementor.java:153)
> at
> org.apache.calcite.piglet.PigConverter.pigToSql(PigConverter.java:244)
> at
> org.apache.calcite.piglet.PigConverter.pigToSql(PigConverter.java:227)
> at
> org.apache.calcite.test.PigRelOpTest$Fluent.assertSql(PigRelOpTest.java:100)
> at
> org.apache.calcite.test.PigRelOpTest$Fluent.access$200(PigRelOpTest.java:64)
> at
> org.apache.calcite.test.PigRelOpTest.testUdf(PigRelOpTest.java:286) {noformat}
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