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Posted to dev@hive.apache.org by "Zoltan Haindrich (JIRA)" <ji...@apache.org> on 2018/10/08 08:33:00 UTC
[jira] [Created] (HIVE-20710) Constant folding may not create null
constants without types
Zoltan Haindrich created HIVE-20710:
---------------------------------------
Summary: Constant folding may not create null constants without types
Key: HIVE-20710
URL: https://issues.apache.org/jira/browse/HIVE-20710
Project: Hive
Issue Type: Bug
Components: CBO
Reporter: Zoltan Haindrich
Assignee: Zoltan Haindrich
During folding on the Hive side; if the resulting contant is null - the rexNode has NULL type - which will cause problems for operators with strict contracts: like AND.
https://github.com/apache/hive/blob/61a027af3a652f3a324727ec5d603a3cbc32ce7d/ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/translator/RexNodeConverter.java#L825
{code}
create table t (a int);
insert into t values(3),(10);
explain select a from t where
(a>1 and null between 0 and 10) is null;
{code}
exception:
{code}
java.lang.ClassCastException: org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableVoidObjectInspector cannot be cast to org.apache.hadoop.hive.serde2.objectinspector.primitive.BooleanObjectInspector
at org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPAnd.initialize(GenericUDFOPAnd.java:56) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.udf.generic.GenericUDF.initializeAndFoldConstants(GenericUDF.java:148) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc.newInstance(ExprNodeGenericFuncDesc.java:260) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.getXpathOrFuncExprNodeDesc(TypeCheckProcFactory.java:1223) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory$DefaultExprProcessor.process(TypeCheckProcFactory.java:1535) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:105) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:89) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.lib.ExpressionWalker.walk(ExpressionWalker.java:76) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:120) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory.genExprNode(TypeCheckProcFactory.java:241) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
at org.apache.hadoop.hive.ql.parse.TypeCheckProcFactory.genExprNode(TypeCheckProcFactory.java:187) ~[hive-exec-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
{code}
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