Hi All,

I have a very big table t with billions of rows and it is partitioned on a 
column p. Column p  has datatype text and values like '201601', '201602'...upto 
'201612'.
And, I am running a query like : Select columns from t where p='201604'.

My question is : Can there be a scenario/condition/probability that my query 
will do a complete table scan on t instead of only reading data for specified 
partition key. If yes, please put some light on those scenario.

I'm asking this because someone told me that there is a probability that the 
query will ignore the partitioning and do a complete table scan to fetch output.

Thanks & Regards,
Abhishek Dubey

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