Amruth S created HIVE-19225: ------------------------------- Summary: Class cast exception while running certain queries with UDAF like rank on internal struct columns Key: HIVE-19225 URL: https://issues.apache.org/jira/browse/HIVE-19225 Project: Hive Issue Type: Bug Components: Hive Affects Versions: 2.3.2 Reporter: Amruth S
Certain queries with rank function is causing class cast exception. {noformat} Caused by: java.lang.ClassCastException: org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryStruct cannot be cast to org.apache.hadoop.hive.serde2.io.TimestampWritable at org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableTimestampObjectInspector.getPrimitiveJavaObject(WritableTimestampObjectInspector.java:39) at org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableTimestampObjectInspector.getPrimitiveJavaObject(WritableTimestampObjectInspector.java:25) at org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.copyToStandardObject(ObjectInspectorUtils.java:412) at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFRank.copyToStandardObject(GenericUDAFRank.java:219) at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFRank$GenericUDAFAbstractRankEvaluator.iterate(GenericUDAFRank.java:153) at org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.aggregate(GenericUDAFEvaluator.java:192) at org.apache.hadoop.hive.ql.udf.ptf.WindowingTableFunction.processRow(WindowingTableFunction.java:407) at org.apache.hadoop.hive.ql.exec.PTFOperator$PTFInvocation.processRow(PTFOperator.java:325) at org.apache.hadoop.hive.ql.exec.PTFOperator.process(PTFOperator.java:139) at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:897) at org.apache.hadoop.hive.ql.exec.SelectOperator.process(SelectOperator.java:95) at org.apache.hadoop.hive.ql.exec.mr.ExecReducer.reduce(ExecReducer.java:236) ... 7 more 2018-03-29 09:28:43,432 INFO [main] org.apache.hadoop.mapred.Task: Runnning cleanup for the task {noformat} The following changes fixes this. The evaluator seem to skip the case where the primary obj emitted is struct. Modified the code to find the field inside struct {code:java} diff --git a/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/StandardStructObjectInspector.java b/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/StandardStructObjectInspector.java index 36a500790a..e7731e99d7 100644 --- a/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/StandardStructObjectInspector.java +++ b/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector/StandardStructObjectInspector.java @@ -22,6 +22,7 @@ import java.util.Arrays; import java.util.List; +import org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryStruct; import org.slf4j.Logger; import org.slf4j.LoggerFactory; @@ -171,6 +172,10 @@ public Object getStructFieldData(Object data, StructField fieldRef) { // so we have to do differently. boolean isArray = data.getClass().isArray(); if (!isArray && !(data instanceof List)) { + if (data instanceof LazyBinaryStruct + && fieldRef.getFieldObjectInspector().getCategory() == Category.PRIMITIVE) { + return ((LazyBinaryStruct) data).getField(((MyField) fieldRef).fieldID); + } if (!warned) { LOG.warn("Invalid type for struct " + data.getClass()); LOG.warn("ignoring similar errors."); {code} Let me know your thoughts -- This message was sent by Atlassian JIRA (v7.6.3#76005)