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https://issues.apache.org/jira/browse/LIVY-754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marco Gaido resolved LIVY-754.
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Fix Version/s: 0.8.0
Assignee: Wing Yew Poon
Resolution: Fixed
Issue resolved by PR: https://github.com/apache/incubator-livy/pull/288.
> precision and scale are not encoded in decimal type
> ---------------------------------------------------
>
> Key: LIVY-754
> URL: https://issues.apache.org/jira/browse/LIVY-754
> Project: Livy
> Issue Type: Bug
> Components: Thriftserver
> Affects Versions: 0.7.0
> Reporter: Wing Yew Poon
> Assignee: Wing Yew Poon
> Priority: Major
> Fix For: 0.8.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> The Livy Thrift server support for decimal type in 0.7 is inadequate.
> Before LIVY-699, decimal is mapped to the catch-all string type. With
> LIVY-699, decimal is mapped to a decimal type that is inadequate in that it
> does not encode the precision and scale. The type in Livy is represented by a
> BasicDataType case class which contains a String field, name; and a DataType
> (an enum) field, dataType. In the case of decimal, the dataType is
> DataType.DECIMAL. The precision and scale of the decimal is not encoded.
> When the DataType is converted to a TTypeDesc for sending a Thrift response
> to a client request for result set metadata, the TTypeDesc contains a
> TPrimitiveTypeEntry(TTypeId.DECIMAL_TYPE) without TTypeQualifiers (which are
> needed to capture the precision and scale). This results in problems for
> clients. E.g., if we connect to the Thrift server in beeline and do a select
> from a table with column of decimal type, we get
> {noformat}
> java.lang.NullPointerException
> at org.apache.hive.jdbc.JdbcColumn.columnPrecision(JdbcColumn.java:310)
> at
> org.apache.hive.jdbc.JdbcColumn.columnDisplaySize(JdbcColumn.java:262)
> at
> org.apache.hive.jdbc.HiveResultSetMetaData.getColumnDisplaySize(HiveResultSetMetaData.java:63)
> at
> org.apache.hive.beeline.IncrementalRows.<init>(IncrementalRows.java:57)
> at
> org.apache.hive.beeline.IncrementalRowsWithNormalization.<init>(IncrementalRowsWithNormalization.java:47)
> at org.apache.hive.beeline.BeeLine.print(BeeLine.java:2322)
> at org.apache.hive.beeline.Commands.executeInternal(Commands.java:1026)
> at org.apache.hive.beeline.Commands.execute(Commands.java:1215)
> at org.apache.hive.beeline.Commands.sql(Commands.java:1144)
> at org.apache.hive.beeline.BeeLine.dispatch(BeeLine.java:1497)
> at org.apache.hive.beeline.BeeLine.execute(BeeLine.java:1355)
> at org.apache.hive.beeline.BeeLine.begin(BeeLine.java:1134)
> at org.apache.hive.beeline.BeeLine.begin(BeeLine.java:1082)
> at
> org.apache.hive.beeline.BeeLine.mainWithInputRedirection(BeeLine.java:546)
> at org.apache.hive.beeline.BeeLine.main(BeeLine.java:528)
> {noformat}
> Note: You have to use "--verbose" with beeline to see the stack trace for the
> NPE.
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