What is timestamp in hive?

Hive timestamps are an interpret to be time-zone less and stored as an offset in UNIX format. The hive timestamp format is YEAR-Month-Day-Hours-Minutes-seconds [YYYY-MM-DD HH:MM:SS] with an optional fraction of seconds. Anything else that will come with the above format should be read as a string and converted later.

How do I get a timestamp on my hive?

Hive provides few date functions to get the current timestamp values. The functions are current_timestamp() and unix_timestamp(). The format of the timestamp value is ‘YYYY-MM-DD HH:MM:SS. sss’.

Does Hive support timestamp?

It supports timestamp, date, and interval data types. Hive provides Timestamp and Date data types to UNIX timestamp format. TIMESTAMP- It uses nanosecond precision and is denoted by yyyy-mm-dd hh:mm: ss format.

How do I add seconds to timestamp in hive?

Instead of using UDF, you can add seconds to datetime, converted it to unix_timestamp() and then convert the result back to datetime. So, in case of minutes addition you shall add number of minutes*60.

Does parquet support timestamp?

UnsupportedOperationException: Parquet does not support timestamp.

How is hive time difference calculated?

1 Answer

1. Convert both dates to seconds from 1970-01-01.
2. Substract them.
3. Divide by 60 to get minutes.

How is Hive time difference calculated?

How is timestamp stored in parquet?

When Hive stores a timestamp value into Parquet format, it converts local time into UTC time, and when it reads data out, it converts back to local time. Impala, however on the other hand, does no conversion when reads the timestamp field out, hence, UTC time is returned instead of local time.

Does parquet support date data type?

Use the DATE data type to store date values. The DATE type is supported for Avro, HBase, Kudu, Parquet, and Text. Parquet and Avro considerations: Parquet and Avro use DATE logical type for dates.