HWC and Hive (HDinsight): reserved keyword as a column name

Core Velocity 1 Reputation point
2021-03-15T15:30:26.08+00:00

with an attempt to save the dataframe for a table which has a column name 'timestamp' and SaveMode.Overwrite, the following exception occurs:

org.apache.hadoop.hive.ql.parse.ParseException:line 1:47 cannot recognize input near 'timestamp' 'timestamp' ',' in column name or constraint

Indeed, 'timestamp' is a reserved keyword, however we have the following quote from Hive documentation:

"Reserved keywords are permitted as identifiers if you quote them as described in Supporting Quoted Identifiers in Column Names (version 0.13.0 and later, see HIVE-6013). Most of the keywords are reserved through HIVE-6617 in order to reduce the ambiguity in grammar (version 1.2.0 and later). There are two ways if the user still would like to use those reserved keywords as identifiers: (1) use quoted identifiers, (2) set hive.support.sql11.reserved.keywords=false. (version 2.1.0 and earlier)|"

Any suggestion from community or should it be submitted to support as a bug?

Azure HDInsight
Azure HDInsight
An Azure managed cluster service for open-source analytics.
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  1. PRADEEPCHEEKATLA-MSFT 76,836 Reputation points Microsoft Employee
    2021-03-19T09:38:11.477+00:00

    Hello @Core Velocity ,

    Hive allows reserved keywords in column name if we use backticks around them or just rename the column name. 

    `timestamp`

    Hope this helps. Do let us know if you any further queries.

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