[HIVE-1478] Non-boolean expression in WHERE should be rejected

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Won't Fix
• Affects Version/s: 0.7.0
• Assignee: Zoltan Haindrich
• Reporter: Paul Yang
• Created: 22/Jul/10 00:13
• Updated: 26/Aug/19 13:02
• Resolved: 09/Dec/16 12:29

Description

Automatically casting strings or other types into boolean may confuse even the user - and somehow it doesn't always work (HIVE-15089)

sql2011 states that "where expression" should accept a boolean expression.

Original reported problem:

If the expression in the where clause does not evaluate to a boolean, the job will fail with the following exception in the task logs:

Query:

SELECT key FROM src WHERE 1;

Exception in mapper:

2010-07-21 17:00:31,460 FATAL ExecMapper: org.apache.hadoop.hive.ql.metadata.HiveException: Hive Runtime Error while processing row

{"key":"238","value":"val_238"}

at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:417)
at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:180)
at org.apache.hadoop.mapred.MapRunner.run(MapRunner.java:50)
at org.apache.hadoop.mapred.MapTask.runOldMapper(MapTask.java:358)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:307)
at org.apache.hadoop.mapred.Child.main(Child.java:159)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Boolean
at org.apache.hadoop.hive.ql.exec.FilterOperator.processOp(FilterOperator.java:84)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:45)
at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:457)
at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:400)
... 5 more

Issue Links

• is related to: HIVE-15089 Error: java.lang.RuntimeException: Hive Runtime Error while closing operators: java.lang.Integer cannot be cast to java.lang.Boolean
• is related to: HIVE-15408 Support auto-casting non-boolean where condition into boolean