MapD str.to_timestamp() : No translation rule for <class 'ibis.expr.operations.StringToTimestamp'>

[565ee]

expr = ibis.literal('20170206').to_timestamp('%Y%m%d')
client.execute(expr)

ibis.common.OperationNotDefinedError: No translation rule for <class 'ibis.expr.operations.StringToTimestamp'>

Backend=MapD_4.1.1 ibis=0.14 Python=3.6 Ubuntu=18.04 Anaconda=5.1

[xmnlab]

thanks @lzhmhznr for point us that

I am checking the issues related to MapD and we are planing to add new features to ibis-mapd also.

@cpcloud could you add a "MapD" flag to this issue?

[xmnlab]

@lzhmhznr at this moment this operation is not supported by mapd database. I will change to this function to raise Unsupported Exception.